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The short-finned pilot whale research news section presents studies conducted by other researchers of the marine mammal scientific community.

It is often the case that cited studies are not just focused on short-finned pilot whales but rather had a broader research interest. However, short summaries are reduced to informations given for Globicephala macrorhynchus. Please visit the journals' websites to download full articles.


Recent update: 14.03.2014


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(30.01.2014) Hearing
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Source: Greenhow et al. (2014) Hearing threshold measurements of five stranded short-finned pilot whales (Globicephala macrorhynchus). Journal of the Acoustical Society of America 135: 531-536.

The authors analysed hearing capacities of five stranded short-finned pilot whales from Florida and Curacao using auditory evoked potentials. Peak sensitivities were found for frequencies around 40 kHz with threshold levels ranging 70-80 dB among adult, juvenile and newborn animals. Cut-off frequencies were around 80-120 kHz.

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(27.01.2014) Distribution
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Source: Whitt et al. (2011) A review of marine mammal records of Cuba. Latin American Journal of Aquatic Mammals 9: 65-122.

The authors reviewed -next to other cetacean species- short-finned pilot whale occurrences off Cuba from recent stranding, sighting and capture data.

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(27.01.2014) Distribution
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Source: Jimιnez-Pinedo et al. (2011) Cetacean occurrence in the Tayrona National Park, a marine protected area in the Colombian Caribbean. Latin American Journal of Aquatic Mammals 9: 154-159.

The authors reported a single sighting of a group of 60 short-finned pilot whales on the east side of Gayraca Bay during 32 systematic cetacean surveys between February-June 2006.

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(13.11.2013) Diving
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Source: Alves et al (2013) Daytime dive characteristics from six short-finned pilot whales Globicephala macrorhynchus off Madeira Island. Arquipelago 31: 1-8.

The authors deployed six time-depth recorders on short-finned pilot whales off Madeira from 2005-2011. During daytime, the whales spent a considerable amount of time at the surface (mean=76.3%) and presented a low diving rate (mean=6.8 dives per hour). Maximum dive depth recorded was 988 m, and dives deeper than 500 m suggest foraging activity along their preferred habitat area.

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(04.11.2013) Distribution
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Source: Silva et al. (2014) Spatial and temporal distribution of cetaceans in the mid-Atlantic waters around the Azores. Marine Biology Research 10: 123-137.

The authors reported cetacean occurrence around the Azores using a long term dataset collected from boat surveys and land-based observations from 1999 to 2009. Among twenty-four species which were recorded, short-finned pilot whales showed a mean group size of 9.4 (range: 3-18) animals. They were encountered in waters with a mean depth of about 1,500m.

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(01.11.2013) Distribution
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Source: Sohou et al. (2013) Biodiversity and status of cetaceans in Benin, West Africa: an initial assessment. West African Journal of Applied Ecology 21: 121-131.

Short-finned pilot whales were found to occur among seven cetacean species in Benin waters.

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(02.10.2013) Behavior / biopsy sampling
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Source: Crain et al. (2013) A quantitative analysis of the response of short-finned pilot whales,
Globicephala macrorhynchus, to biopsy sampling. Marine Mammal Science.

The authors studied the immediate responses to 12 biopsy attempts of 8 different short-finned pilot whales off Cape Hatteras, North Carolina, USA in 2010-2011. Short-finned pilot whales responded by increasing the group vocalization rate after a biopsy attempt. No change in surface time, body orientation, foraging behavior and fluke amplitude and rate was observed.

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(26.08.2013) Habitat use and abundance
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Source: Baird et al. (2013) Odontocete cetaceans around th main Hawaiian Islands: habitat use and relative abundance from small-boat sighting surveys. Aquatic Mammals 39: 253-269.

From 2000 to 2012 the authors conducted small-boat sighting surveys around the main Hawaiian Islands. Short-finned pilot whales were found in slope waters (500-2,500m depth) and year-round during all oceanographic seasons. Among 20 identified species, pilot whales were generally the most commonly sighted species with 8.33 sightings per 100h, mainly in water depths <2,000m. Mean group size was 20 (min 1 and max 195).

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(19.08.2013) Genetics
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Source: Miralles et al. (2013) Interspecific introgression in cetaceans: DNA markers reveal post-F1 status of a pilot whale. PLoS ONE 8(8): e69511.

The authors document a post-F1 hybrid between Globicephala melas and Globicephala macrorhynchus which stranded at the Galician coast.

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(15.08.2013) Distribution and residency
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Source: Aurioles-Gamboa et al. (2013) Habitat, trophic level, and residence of marine mammals in the Gulf of California assessed by stable isotope analysis. Marine Ecology Progress Series 488: 275–290.

By using stable isotope analysis, the authors showed that resident and non-resident short-finned pilot whales share their habitat in the Gulf of California.

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(29.04.2013) Distribution
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Source: Luksenburg (2013) The cetaceans of Aruba, southern Caribbean. Journal of the Marine Biological Association of the United Kingdom.

In 2010 and 2011, the author conducted boat-based surveys off Aruba. She had 117 positively-identified sightings and found short-finned pilot whales to be one out of eight occurring species in the area.

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(15.04.2013) Relative abundance
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Source: Pardo et al. (2013) Role of environmental seasonality in the turnover of a cetacean community in the southwestern Gulf of California. Marine Ecology Progress Series 487: 245-260

As a result of survey and environmental condition data, the authors examined the annual overturn of the cetacean community in the Gulf of California. Short-finned pilot whales were numerically dominant in late summer and autumn (July-November).

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(15.04.2013) Toxicology
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Source: Ende et al. (2013) Carbon and nitrogen stable isotope ratios and mercury concentration in the scalp hair of residents from Taji, a whaling town. Marine Pollution Bulletin 69: 116-121.

The authors analysed stable isotop ratios from the hairs of Japanes consuming whale meat. The mercury concentration was significantly higher for meat-eaters than for non-eaters. High levels of mercury have been found in red meat products from short-finned pilot whales sold in and around Taiji.

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(01.04.2013) Acoustics / Foraging
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Source: Au et al. (2013) Nighttime foraging by deep diving echolocating odontocetes off the Hawaiian islands of Kauai and Ni'ihau as determined by passive acoustic monitors. Journal of the Acoustical Society of America 133 (5): 3119-3127.

By using passive acoustic autonomous recorders in 2010-11, the authors detected echolocation signals of short-finned pilot whales at both locations. In comparison with four other species, pilot whales were detected most often for the SW recording location of Kauai though their daily detection rates can be extremely variable. 73% of their recorded biosonar clicks were observed during twilight-night time detections (6:00 p.m.-6:00 a.m.) suggesting that foraging mainly occurs at night.

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(26.03.2013) Pathology / Strandings
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Source: Arbelo et al. (2013) Pathology and causes of death if stranded cetaceans in the Canary Islands (1999-2005). Diseases of Aquatic Organisms 103: 87-99.

The authors examined 233 carcasses of 19 stranded cetacean species in the Canary Islands from 1999-2005, and defined pathological categories resulting from anthropogenic (e.g. foreign body pathology, collisions with vessels, military manoeuvres) and non-anthropogenic impacts (e.g. pathology associated with significant loss of nutritional status, traumatic intra- and interspecific interactions). Among 6 stranded short-finned pilot whales the authors found 5 carcasses with non-anthropogenic causes of mortality such as significant loss of nutritional status (n=4), pathology with good nutritional status (n=1) and one animal with a non-defined cause of death.

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(04.03.2013) Site fidelity/ social structure
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Source: Alves et al. (2013) Population structure of short-finned pilot whales in the oceanic archipelago of Madeira based on photo-identification and genetic analyses: implications for conservation. Aquatic Conservation: Marine and Freshwater Ecosystems.

By using a combination of photo-identification and molecular genetics, the authors examined site fidelity, residency and association patterns of short-finned pilot whales off Madeira between 2003- 2011. They found that the local population consists of long-term residents, regular visitors and transients. Group size averaged 15 individuals and ranged 4-29. Their genetic analysis suggests that small groups consist of related animals and mating occurs between animals of different groups. The authors further propose that the population consists of clans each consisting of matrilinear pods.

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(01.03.2013) Stranding/satellite-tracking
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Source: Wells et al. (2013) Movements and dive patterns of short-finned pilot whales (Globicephala macrorhynchus) released from a mass stranding in the Floria Keys. Aquatic Mammals 39 (1).

The authors tagged two stranded short-finned pilot whales off Florida and monitored spatial movements, dive patterns and inter-individual proximity after release for 67 days via satellite-telemetry. They found that the animals remained together and conducted 40 minute dives to more than 1,000m. However, more than 60% of dives were less than 50m and had a duration of less than 10min. Daily movement rates ranged 0-7,5 km/h. Deeper dives occurred mostly at dawn, dusk or night.

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(07.02.2013) Morphology
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Source: Velten et al. (2013) Novel locomotor muscle design in extreme deep-diving whales. Journal of Experimental Biology 216: 1862-1871.

Short-finned pilot whales have been shown to perform high-speed sprints at depth. The authors showed that they have a rare mammal muscle morphology which supports high activity events.

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(01.02.2013) Ecology
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Source: Wenzel & Lσpez Suαrez (2012) What is known about cookiecutter shark (Isistius spp.) interactions with cetaceans in Cape Verde seas?. Zoologia Caboverdiana 3 (2): 57-66

The authors report and illustrate cookiecutter shark bites for short-finned pilot whales in Cap Verde waters.


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(30.11.2012) Stranding/rehabilitation
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Source: Wells et al. (2012) Evaluating postintervention survival of free-ranging odontocete cetaceans. Marine Mammal Science.

The authors evaluated postintervention survival of free-ranging cetaceans receiving aid from humans and reviewed 69 cases of strandings, mass strandings, rescue and rehabilitation, entanglements and so on. The authors reported and discussed 5 cases of postintervention survival of short-finned pilot whales after mass strandings.

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(30.11.2012) Depredation
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Source: Rabearisoa et al. (2012) Pelagic longline fishing trials to shape a mitigation device of the depredation by toothed whales. Journal of Experimental Marine Biology and Ecology 432-433: 55-63.

Among others, short-finned pilot whales are subject to regular depradation in longline fisheries targeting swordfish and tuna. In 2007-08, the authors examined the efficiancy of a depradation mitigation device which hides hooked fish to predators. By applying this new technique, the authors found that the number of sets impacted by shark depredation was significantly greater than the number of sets involving toothed whale depredation. However, when depredation occurred, the proportion of fish damaged by toothed whales was significantly greater.

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(26.11.2012) Acoustics/abundance
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Source: Hodge et al. (2012) The influence of habitat and time of day on the occurrence of odontocete vocalizations in Onslow Bay, North Carolina. Marine Mammal Science.

The authors examined the occurrence and duration of odontocete vocal events in relation to depth and time of day in Onslow Bay in 2008. The vocalizations of short-finned pilot whales were detected and analysed in the general category of delphinid vocalizations. Pilot whales were rather detected in deeper waters which agrees with sighting data and the findings of deep water prey in the animals' stomachs.

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(01.11.2012) Physiology
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Source: Bagge et al. (2012). Lipid class and depth-specific thermal properties in the blubber of the short-finned pilot whale and the pygmy sperm whale. The Journal of Experimental Biology 215: 4330-4339.

The authors examined thermal insulation of blubber of seven short-finned pilot whales. They found that the whales are capable of storing heat in their blubber.

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(01.11.2012) Distribution
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Source: Clark et al. (2012) Cetacean sightings and acoustic detections in the offshore waters of the Maldives during the northeast monsoon seasons of 2003 and 2004. Journal of Cetacean Research and Management 12: 227-234.

The authors examined the offshore cetacean fauna of the Maldives. They only sighted one group with 15 individuals of short-finned pilot whales in 2004 (none in 2003) whereas this species could be acoustically detected 19 times

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(01.11.2012) Distribution
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Source: Anderson et al. (2012) Cetaceans in the Maldives: a review. Journal of Cetacean Research and Management 12: 219-225.

The authors reviewed cetacean occurrences in the Maldives. Among stranded cetaceans, short-finned pilot whales were found just once. Among 1,921 on-effort encounters, this species had a rate of 4.2% and among altogether 71,276 sighted individuals, pilot whales were represented by 1.9%.

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(19.07.2012) Acoustics
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Source: DeRuiter et al. (2012) Delphinid whistle production and call matching during playback of simulated military sonar. Marine Mammal Science.

In 2007-2008, the authors studied acoustic responses of three cetacean species to simulated mid-frequency actice sonar (MFA). The authors used Dtags to study acoustic and movement data. During 3h 15min of tag deployment, the authors obtained 173 pilot whale whistles. The authors did not find any relationships between short-finned pilot whale whistle rates and MFA sounds within the exposure period.

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(09.07.2012) Acoustics
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Source: Sayigh et al. (2012) Repeated call types in short-finned pilot whales, Globicephala macrorhynchus. Marine Mammal Science.

The authors tagged (DTAGs) four short-finned pilot whales in the Bahamas in 2007. From 4,098 calls, 1,737 were placed into 173 call types. Though the authors found that repetitive calls were mainly produced by a single animal in row, some calls of the same type overlapped or were recorded on more than one tag which suggests that at least some calls are shared by members of a group or subgroup.

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(04.06.2012) Physiology
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Source: Bernaldo de Quirσs et al. (2012) Decompression vs. Decomposition: distribution, amount, and gas composition of bubbles in stranded marine mammals. Frontiers in Physiology 3: 1-19.

The authors examined gas embolic lesions (which are linked to military sonar) in stranded cetaceans in the Canary Islands which were found between 2006-10. Short-finned pilot whales as deep divers were found to show higher abundance of gas bubbles in comparison with non-deep diving species and in summary, a clear difference was found in gas composition of bubbles in animals with different decomposition codes.

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(01.05.2012) Acoustics/distribution
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Source: Klinck et al. (2012) Near-real-time acoustic monitoring of beaked whales and other cetaceans using a seaglieder ™. PloS ONE 7: e36128

During 3 weeks in 2009 the authors used an automatic underwater vehicle for passive acoustic monitorings of cetaceans off the Kona coast of Hawaii. The analysis is focused on click vocalizations of Cuvier's and Blainville's beaked whales. The number of delphinid vocalizations was significantly hiher during night-time. Based on previous studies in the area showing diel activity patterns of pantropical spotted dolphins and short-finned pilot whales, the authors resume that their recorded clicks were generated by short-finned pilot whales during foraging activities at night.

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(01.05.2012) Behaviour/acoustics
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Source: Crain (2012) A quantitative analysis of the response of short-finned pilot whales, Globicephala macrorhynchus, to biopsy attempts. M.Sc. Thesis, Duke University, 17 pages.

The authors studied the immediate responses to 12 biopsy attempts of 8 different short-finned pilot whales off Cape Hatteras, North Carolina, USA in 2010-2011. Short-finned pilot whales responded by increasing the group vocalization rate after a biopsy attempt. No change in surface time, body orientation, foraging behavior and fluke amplitude and rate was observed.

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(01.04.2012) Distribution/abundance
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Source: Palacios et al. Cetacean distribution and relative abundance in Colombia's Pacific EEZ from survey cruises and platforms of opportunity. Journal of Cetacean Research and Management 12: 45-60-

The authors reported data gained during the years 1986-2008 off the west coast of Colombia. Among 19 cetacean species found, short-finned pilot whale encounter rates were ranked low. Average group size was 16 and ranged 1-80.

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(17.03.2012) Social structure/site fidelity
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Source: Mahaffy, S.D. (2012) Site fidelity, associations and long-term bonds of short-finned pilot whales off the island of Hawai‘i. M.Sc. Thesis, Portland State University. 151 pp.

Short-finned pilot whales are the most sighted odontocete species of Hawai'i. Among these the author photo-identified 448 individuals (durint the years 2003-2007) from which 305 were seen more than oonce and 250 were seen in >1 year. The data suggests that only some individuals exhibit high site fideilty. Based on multi-year site fidelity to the study area, 154 individuals were defined to be core residents, residents (150 individuals) and visitors (142 individuals). Assigment of age and sex classes to unit members indicated some level of segregation between adult males and female/calf pairs. The auhtor suggests that the waters off Hawai'i are frequented by different populations.

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(01.03.2012) Distribution
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Source: Guedes Batista et al. (2012) Cetaceans registered on the coast of Ilhιus (Bahia), northeastern Brazil. Biota Neotropica 12(1)

The authors report live or dead dead cezaceans found ashore along the coast of Ilhιus, Brazil which were collected during a campaign from 1997 to 2007. Data was reported by local people such as fishermen. During the greatest numbers of records from 2000-2003, 38 cetaceans from 10 species were found in the area. Only one dead 2.5m long short-finned pilot whale was found among these.

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(29.02.2012) Distribution
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Source: Ponnampalam (2012) Opportunistic observations on the distribution of cetaceans in the Malaysian South China, Sulu and Sulawesi Seas and an updated checklist of marine mammals in Malaysia. The Raffles Bulletin of Zoology 60: 221-231.

During 21 days at sea in 2009 the author opportunistically surveyed Malaysian waters and mainly encountered bottlenose, spinner and pantropical spotted dolphins. Though short-finned pilot whales have been previousely sighted (from live sightings and strandings) in the area, the author did not detect this species during her survey. However, the low variety of species encountered might be the result of ship noise impacts of the large survey vessel, distribution shifts or migration patterns.

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(01.08.2011) Distribution
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Source: Fulling et al (2011) Distribution and abundance estimates for cetaceans in the waters off Guam and the Commonwealth of the Northern Mariana Islands. Pacific Science 65: 321-343.

Using line transect visual surveys in waters off Guam and CNMI in 2007, the authors encountered short-finned pilot whales 5 times from a total of 153 sightings. Animal were once found in coastal (>927m deep) waters off Guam and in deep (>2,500m) more offshore waters. Group sizes ranged 5-43 animals with a mean size of 17.5.

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(07.07.2011) Photo-identification
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Source: Rone & Pace (2011) A simple photograph-based approach for discriminating between free-ranging long-finned (Globicephala melas) and short-finned (G. macrorhynchus) pilot whales off the east coast of the United States. Marine Mammal Science.

Long- and short-finned pilot whales overlap in distribution in the study area. Based on relatively similar external body features, both species are hard to distinguish at sea. Using skin samples and morphometric measurements obtained from photographs, the authors developed a tool to distinguish between both species.

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(09.06.2011) Distribution
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Source: Rosales-Nanduca et al (2011) Macroecology of marine mammal species in the Mexican Pacific Ocean: diversity and distribution. Marine Ecology Progress Series 431: 281-291.

During 11,145 marine mammal sightings made between 1981 and 2008, short-finned pilot whales were found to be a common species in the area.

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(01.06.2011) Abundance
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Source: Kanaji et al. (in press) Long-term abundance trends of the northern form of the short-finned pilot whale (Globicephala macrorhynchus) along the Pacific coast of Japan. Marine Mammal Science.

The authors estimate the abundance trends of short-finned pilot whales in Japanese waters from 1985-2006 conducting ship-based line transect surveys and by analysing data from previous sighting surveys. The authors found school sizes ranging 8-1,500 animals whereas schools supposingly are aggregations of several groups which use food patches collectively. The authors calculated that the abundance was greatest in 1985 which was followed by a drastic decline in 1986-1988 and a slight recovery in 1991-2006. The decline in abundance in the late 1980s may imply that the whaling harvest in the early years seriously depleted the abundance of the northern form of short-finned pilot whales.

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(09.05.2011) Captivity
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Source: Zhang et al (2011) Historical and current records of aquarium cetaceans in China. Zoo Biology 30: 1-14.

The authors report 2 short-finned pilot whales currently held in captivity in Chinese aquaria. A male and female specimen of unknown age are held in the Hangzhou Polar Ocean Park (near Shanghai) since 2008 and were caught in the wild.

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(02.04.2011) Pathology
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Source: Belliθre et al. (2011) Phylogenetic analysis of a new Cetacean morbillivirus from a short-finned pilot whale stranded in the Canary Islands. Research in Veterinary Science 90: 324-328.

The authors found a new strain of morbillivirus in a stranded speciman of short-finned pilot whale. The paper describes the molecular characterization of a strain which they detect in the pilot whale's brain.

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(01.04.2011) Diving and swim speeds
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Source: Sakai et al. (2011) Swim speed and acceleration measurements of short-finned pilot whales (Globicephala macrorhynchus) in Hawai'i. Mammal Study 36: 55-59.

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(01.03.2011) Vessel-whale collisions
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Source: Carillo & Ritter (2010) Increasing numbers of ship strikes in the Canary Islands: proposal for immediate action to reduce risk of vessel-whale collisions. Journal of Cetacean Research and Management 11: 131-138.

The authors reviewed collisions of cetaceans and commercial ferries in the Canary Islands. Short-finned pilot whales were found to be -next to six other- one of the most affected species with six reported cases (10% of all collisions) from 1992-2007. Data was obtained from stranded specimen which all showed lethal injuries resulting from ship strikes.

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(23.02.2011) Acoustics and diving
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Source: Jensen et al. (2011) Calling under pressure: short-finned pilot whales make social calls during deep foraging dives. Proceedings of the Royal Society B

The authors examined the impacts of hydrostatic pressure during deep dives on the calling behaviour of short-finned pilot whales southwest off Tenerife by using DTAGs attached to altogether 12 whales. The found that whales produced tonal calls at depths of up to 800m. Surprisingly the whales decreased their calling rate during dives though increasing their distance to group members. Frequency content of calls were unaffected during dives but call duration decreased at depth, apparantly because of lung collapse induced by hydrostatic pressure. Calling rate increases during dive ascents and may help to locate group members at the surface.

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(01.02.2011) Acoustics
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Source: Schlundt et al. (2011) Auditory evoked potentials in two short-finned pilot whales (Globicephala macrorhynchus). Journal of the Acoustical Society of America 129: 1111-1116.

The authors tested hearing sensitivities by measuring auditory evoked potentials generated in response to clicks and sinusoidal tones for two individuals: one adult female held in captivity at Sea World for 27 years and a recently stranded juvenile male. The authors found a region of best hearing sensitivity near 40 kHz and the upper limit of functional hearing was between 80 and 100 kHz. The stranded whale was found to suffer severe hearing loss above 10 kHz.

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(01.01.2011) Distribution
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Source: Weir (2011) Distribution and seasonality of cetaceans in tropical waters between Angola and the Gulf of Guinea. African Journal of Marine Science 33: 1-15.

Between 2004 and 2009 the author used geophysical platforms to opportunistically surveying the area. Short-finned pilot whales are reported to be one of the most frequently sighted delphinid species. Density was highest in waters off the Northern coast of Angola with a year-round occurrence. Mean group size was 23.1 and groups were found in waters with a mean depth of 1,673 m.

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(03.11.2010) / Hearing
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Source: Mann et al. (2010) Hearing loss in stranded odontocete dolphins and whales. PLoS ONE 5(11): e13824, 5 pages.

The authors obtained an audiogram from 1 stranded short-finned pilot whale which had profound hearing loss.

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(01.11.2010) / Acoustics
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Source: Baumann-Pickering et al. (2010) Characterization of marine mammal recordings from the Hawaii range complex. Technical report NPS-OC-10_004CR. 50 pages.

During passive acoustic monitoring from 2007 to 2009 obtained and analysed more than 9,665 echolocation clicks from three recording sessions. Clicks showed mean peak frequencies of 17.5-20.7 kHz and mean signal durations of 0.32 – 0.37 msec.

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(01.11.2010) / Strandings and distribution
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Source: Hazevoet et al. (2010) Recent data on whales and dolphins (Mammalia: Cetacea) from the Cape Verde Islands, including records of four taxa new to the archipelago. Zoologia Caboverdiana 1: 75-99.

The authors report seven short-finned pilot whale stranding events on several islands during the last decade with 5-50 individuals per stranding.

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(07.10.2010) / Distribution
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Source: Carrillo et al. (2010) Cetacean diversity and distribution off Tenerife (Canary Islands). Marine Biodiversity Records 3: e97.

From surveys southwest and northeast between 1997-2006 off Tenerife the authors sighted short-finned pilot whales as the second most abundant species with a year-round occurrence. In more than the half of all encounters groups contained single or more calves.

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(01.09.2010) / Diet
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Source: Kiszka et al. (2010) The use of stable isotope analyses from skin biopsy samples to assess trophic relationships of sympatric delphinids off Moorea (French Polynesia). Journal of Experimental Marine Biology and Ecology 395: 48-54.

The authors showed that sympatric delphinid species (spinner and rough-toothed dolphin, melon-headed and short-finned pilot whale) have somehow different feeding niches although statistical analyses do not always show significant differences among species.

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(28.07.2010) / Distibution
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Source: de Boer (2010) Cetacean distribution and relative abundance in offshore Gabonese waters. Journal of the Marine Biological Association of the United Kingdom 90: 1613-1621.

During March and August 2009 the author encountered three groups of short-finned pilot whales off Gabon.

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(01.07.2010) Strandings and distribution
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Source: Danil et al (2010) Cetacean strandings in San Diego County, California, USA: 1851-2008. Journal of Cetacean Research and Management 11: 163-184.

Between 1851 and 2008, 20 specimen of short-finned pilot whales stranded along the coast of San Diego County. 3 animals stranded alive and 17 were already dead. The authors documented a stranding decline of this species since the 1960s and this reflects a decline in density of pilot whales in the Southern California Bight after the strong El Nino event in 1982-83.

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(01.06.2010) / Distribution
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Source: Yoshida et al. (2010) Cetacean sightings in the eastern Caribbean and adjacent waters, spring 2004. Aquatic Mammals 36: 154-161.

The authors encountered 4 groups of short-finned pilot whales with altogether 132 individuals in the eastern Caribbean Sea and the adjacent southwestern North Atlantic Ocean.

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(01.06.2010) / Distribution
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Source: Salvadeo et al. (2009) The odontocete community and its environment in the southwestern Gulf of California. Latin American Journal of Aquatic Mammals 7: 23-32.

The authors found short-finned pilot whales to be a common species during the warm seasons of 2003-2006 in the La Paz Bay. Their seasonal appearances seemed to correlate with the appearance of jumbo squids as their main food.

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(02.03.2010) / Distribution
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Source: Kiszka et al. (2010) Preliminary account of cetacean diversity and humpback whale (Megaptera novaeangliae) group characteristics around the Union of the Comoros (Mozambique Channel). Mammalia 74: 51-56.

During a survey and opportunistic sightings from 2000 to 2003 short-finned pilot whales -among 11 other species- were encountered around the Comoros. The authors found one group with 60 individuals.

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(01.01.2010) / Behavior
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Source: Oremland et al. (2010) Mandibular fractures in short-finned pilot whales. Marine Mammal Science 26(1): 1-16.

From 50 mass-stranded short-finned pilot whales the authors investigated mandibular fractures in order to test the hypothesis a) whether males should suffer more frequent and substantial fractures than females, and b) whether occurrences increases with male reproductive maturity. The authors found that fractures were relatively common in males (71%) and females (47%). The authors assume that fractures in females originate from a combination of intra- and interspecific interactions and life history characteristics.

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(01.01.2010) Distribution
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Source: Weir (2010) A review of cetacean occurrence in West African water from the Gulf of Guinea to Angola. Mammal Review 40: 2-39.

Short-finned pilot whales were sighted at sea off the coasts of Cote d'Ivoire, Sao Tomι & Principe, Gabon and Angola. Off Cote d'Ivoire and Ghana, specimen were captured. Off Angola group size were reported to be 4-200 individuals and might occur year-round in the area.

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(04.12.2009) / Noise impacts
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Source: Jensen et al. (2009) Vessel noise effects on delphinid communication. Marine Ecology Progress Series 395: 161-175.

The authors discuss potential impacts of vessel noise on the communication system of short-finned pilot whales. Pilot whales, as a deep-water inhabitant, were calculated to suffer a reduction in their communication range within 50m of 58% in response to small vessels travelling at 5 knots.

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(23.11.2009) / Distribution and taxonomy
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Source: Oremus et al. (2009) Wordlwide mitochondrial DNA diversity and phylogeography of pilot whales (Globicephala spp.). Biological Journal of the Linnean Society 98(4): 729-744.

The authors examined the evolution and biogeography of both pilot whale species using mitochondrial DNA. They found that short-finned pilot whales off south Japan appear to represent genetically-distinct forms. The data further suggest that the Japanese southern form of short-finned pilot whales may represent a distinct subspecies.

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(01.09.2009) Distribution
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Source: Van Waerebeek et al (2009) The cetacean fauna of Ghana, a validated faunal checklist. West African Journal of Applied Ecology 15: 61-90.

The authors periodically monitored artisanal fisheries for bycatches in seven Ghanaian fishing ports and landing sites 1996-2004.Short-finned pilot whales were sighted and sometimes taken or by-caught in low numbers by fishermen or killed for research purposes off the coast off Ghana.

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(28.02.2009) / Strandings
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Source: Kusuma Mustika et al. (2009) Whale strandings in Indonesia, including the first record of a humpback whale (Megaptera novaeangliae) in the archipelago. The Raffles Bulletin of Zoology 57(1): 199-206.

The authors reviewed whale strandings in Indonesian waters from 1987-2007. Next to sperm whales, short-finned pilot whales were the most identified stranding species.

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(01.01.2009) / Distribution
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Source: Galindo et al. (2009) Cetacean diversity, distribution, and abundance in northern Veracruz, Mexico. Aquatic Mammals 35(1): 12-18.

During surveys conducted from 2005-2006, the authors observed solely a single short-finned pilot whale in 1.500m deep waters off Veracruz, Gulf of Mexico.

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(01.11.2008) / Distribution and social structure
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Source: Herman, A. & Pistorius, P.A. (2008) Marine mammal diversity in the remote waters of Aldabra Atoll, southern Seychelles. Atoll Research Bulletin 564: 1-7.

The authors sighted 8 groups of short-finned pilot whales from 2000-2007 off the Seychelles. Mean group size was 23.06 animals ranging 4-50.

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(01.09.2008) / Noise impacts
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Source: Weir, C.R. (2008) Short-finned pilot whales (Globicephala macrorhynchus) respond to an airgun ramp-up procedure off Gabon. Aquatic Mammals 34(3): 349-354.

A pod of 15 pilot whales were shown to spatially avoid airgun procedures off the coast of Gabon.

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(28.04.2008) / Foraging and diving
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Source: Aguilar Soto, N. Et al. (2008) Cheetahs of the deep sea: deep foraging sprints in short-finned pilot whales off Tenerife (Canary Islands). Journal of Animal Ecology 77(5): 936-947.

23 short-finned pilot whales off Tenerife were tagged off the southwest coast of Tenerife, Canary Islands. Researchers found them to dive up to 1.018 m in depth and 21 min in duration. Furthermore, the acoustic behavior was recorded during dives which were consistently accompanied by regular echolocation clicks and buzzes. Buzzes were associated with prey capture attempts. Data revealed that pilot whales used deep sprints as a high-risk/high gain foraging tactic, similar to terrestrial predators such as cheetahs.

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(01.04.2008) / Strandings and stomach contents
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Source: Mintzer et al. (2008) Stomach contents of mass-stranded short-finned pilot whales (Globicephala macrorhynchus) from North Carolina. Marine Mammal Science 24(2): 290-302.

The stomach contents of 27 stranded short-finned pilot whales in North Carolina waters were examined in 2005. The diet was composed mainly of squid (49%) but also of fish species.

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(09.02.2008) / Strandings and naval excercises
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Source: Yang et al. (2008) Unusual cetacean mortality event in Taiwan, possibly linkes to naval activities. Veterinary Record 162: 184-186.

From July 19 to August 13 2005 an increase in strandings was reported along the coast of Taiwan. Next to others, one stranded animal was a short-finned pilot whale. The stranding was categorized as 'unusual' because of the amount and temporal concentration of stranded animals which was significant for the area. Furthermore, this unusual mass stranding event can be temporarily correlated with naval excercises held by China and the USA in that region.

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(05.02.2008) / Social structure and life history
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Source: Foote, A.D. (2008) Mortality rate acceleration and post-reporductive lifespan in matrilinear whale species. Biology Letters 4: 189-191.

The author discusses the long post-reproductive lifespan of short-finned pilot whales (similar to killer whales) in contrast to that of long-finned pilot whales. Short-finned pilot whales are believed to form matrilinear stable kinship groups (as killer whales).

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(01.02.2008) Whaling
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Source: Brownell et al (2008) Hunting cetaceans with sound: a worldwide review. Journal of Cetacean Research and Management 10: 81-88.

The authors reviewed globally places where fishermen use sounds to herd whales and dolphins in order to kill them for consumptive utilization or for live captures. The Japanese small cetacean drive fishery mainly hunted -next to some other species- short-finned pilot whales during the 19th and 20th century and used underwater trumpets to herd and drive groups. This method is still being used.

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(01.02.2008) / Distribution
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Source: Sudo et al. (2008) Sighting survey of cetaceans in the Tsugaru Strait, Japan. Fisheries Science 74(1): 211-213.

During a two-year survey from 2003-2004 in the Tsugaru Strait (channel between Honshu and Hokkaido, northern Japan) the authors sighted only a single short-finned pilot whale, indicating a low density for this species in that area.

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(01.01.2008) / Acoustics
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Source: Baron et al. (2008) Differences in acoustic signals from Delphinids in the western North Atlantic and northern Gulf of Mexico. Marine Mammal Science 24 (1): 42-56.

The authors recorded nine groups of short-finned pilot whales in the northern Gulf of Mexico and 31 groups in the western North Atlantic. From altogether 1,392 and 2,444, respectively, pure-tonal whistles they analysed a set of frequency, duration and further spectrographic parameters in order to compare these bioacoustic features between both geographically separated and neighbouring populations.