Observations on a Pygmy Killer Whale (Feresa Attenuata Gray) from Hawaii

Pryor, Taylor A.; Pryor, Karen; Norris, Kenneth S.

doi:10.2307/1377633

Cited by 21 publications

(8 citation statements)

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“…The first live animal known to be of this species was harpooned off Japan only in 1952 (Yamada 1954), and they are naturally rare throughout their range. In Hawaiian waters they were first documented in the wild in 1963 (Pryor et al 1965) and are relatively rare; they represented only 1.7% of odontocete sightings in the Baird et al (2013a) analyses, encountered less often than any of the other 10 species of resident odontocetes. Photo-identification efforts in Hawai'i have revealed the existence of a small population off the island of Hawai'i that exhibits site fidelity ).…”

Section: Pygmy Killer Whalesmentioning

confidence: 99%

Movements and Spatial Use of Odontocetes in the Western Main Hawaiian Islands: Results of a Three-Year Study Off O'ahu and Kaua'i

Baird¹,

Webster²,

Mahaffy³

et al. 2013

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. SPONSOR/MONITOR'S REPORTMonterey, CA 93943-5122 NUMBER(S)NPS-OC-14-001CR DISTRIBUTION / AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTESThe views expressed in this report are those of the authors and do not reflect the official policy or position of the Department of Defense or the US Government. ABSTRACTUnderstanding the impacts of anthropogenic activities on animal populations requires knowledge of their population structure, sizes, and ranges. In Hawaiian waters this type of basic information has been lacking or is restricted to areas where conditions have been more favorable to research efforts, namely the eastern main Hawaiian Islands. As part of an effort to reduce uncertainty regarding the population structure, range, and abundance of odontocetes in the western main Hawaiian Islands, and to help inform Navy impact assessments, we undertook small-boat based research efforts off O'ahu (2010) and Kaua'i (2011Kaua'i ( & 2012. A variety of field methods were used, including photo-identification, collection of biopsy samples for genetic studies, and satellite tagging. There were 191 odontocete sightings, 183 identified to species. 102 biopsy samples were collected from 7 species. 30 satellite tags were deployed on 5 species: pygmy and false killer whales, bottlenose and rough-toothed dolphins, and short-finned pilot whales. Our efforts substantially increased what is known in particular about the movements and habitat use of these 5 species of odontocetes in the western main Hawaiian Islands. SUBJECT TERMSMarine mammals, western Hawaiian Islands, odontocetes, population structure, population size, population range, photo identification, biopsy sampling, satellite tagging, pygmy killer whale, false killer whale, bottlenose dolphin, rough-toothed dolphin, short-finned pilot whale.

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Section: Pygmy Killer Whalesmentioning

confidence: 99%

Movements and Spatial Use of Odontocetes in the Western Main Hawaiian Islands: Results of a Three-Year Study Off O'ahu and Kaua'i

Baird¹,

Webster²,

Mahaffy³

et al. 2013

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“…In reporting a specimen from the eastern tropical Pacific, Perrin and Hubbs (1969) note that the distribution remained almost undetermined until Yamada (1954) described an animal from Japan and Fraser (1960) one from Senegal. Nishiwaki et al (1965) reported that 14 specimens were caught in Japan and Pryor et al (1965) described one caught from Hawaii. Best (1970) recorded strandings in South Africa and Namibia.…”

Section: Pygmy Killer Whale Feresa Attenuatamentioning

confidence: 99%

The distribution of small odontocete cetaceans off the coasts of South Africa and Namibia

Findlay¹,

Best²,

Ross³

et al. 1992

South African Journal of Marine Science

129

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A total of 2 077 records of approximately 49 000 small cetaceans, including dedicated and incidental sightings and specimens, was analysed to define distribution patterns of the 28 species found within southern African waters. Distribution analyses reveal distinct component patterns, including cosmopolitan (found in all waters) and pelagic cosmopolitan (found in all pelagic waters) components, tropical, subtropical and warm temperate components of the Agulhas Current system, an Agulhas Bank component, a South and East Coast inshore component, and West Coast neritic and pelagic components. While the offshore distribution appears to be determined by water depth, possibly through distribution of the principal prey, longshore distribution appears to be determined by water temperature. The high diversity of small cetacean species found within the relatively small study region results from the wide range of zoogeographic components present. These components arise from the wide range of water temperature resulting from the warm Agulhas Current and the upwelling Benguela system.Altesaam 2 077 boekstawings van sowat 49 000 klein walvisagtiges, doelgerigte en toevallige waarnemings en eksemplare ingesluit, is ontleed om die verspreidingpatrone van die 28 spesies wat binne Suider-Afrikaanse waters aangetref word, te omskryf. Verspreidingsontledings toon duidelike patrone van komponente, met inbegrip van kosmopolitiese (in alle waters aangetref) en pelagies kosmopolitiese (in alle pelagiese waters) komponente, tropiese, subtropiese en warmgematigde komponente van die Agulhasslroomstelsel, 'n Agulhasbankkomponent, 'n Suidkus-en Ooskus-aanlandige komponent, en Weskus-neritiese en pelagiese komponente. Die aflandige verspreiding word stellig deur waterdiepte bepaal, moontlik deur die verspreiding van die hoofprooi, maar kuslangse verspreiding word skynbaar deur watertemperatuur bepaal. Die groot verskeidenheid van klein walvisspesies wat binne die betreklik klein slUdiegebied gevind word, is die gevolg van

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“…, Baird et al 2006, 2008 a ; McSweeney et al 2007). The presence of pygmy killer whales in the area has long been known (Pryor et al 1965). When encountered during research on pilot whales, this species and other infrequently encountered odontocetes were photo‐identified.…”

mentioning

confidence: 99%

Site fidelity and association patterns of a rare species: Pygmy killer whales (Feresa attenuata) in the main Hawaiian Islands

McSweeney

Baird

Mahaffy

et al. 2009

Marine Mammal Science

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Most of what we know about cetacean biology and ecology comes from studies of relatively common species. Despite their distribution throughout the tropics and sub-tropics, pygmy killer whales (Feresa attenuata) are rare throughout their range and are one of the most poorly-known species of odontocetes. During a 22-yr study of short-finned pilot whales (Globicephala macrorhynchus) off the island of Hawai'i, we opportunistically photo-identified pygmy killer whales whenever encountered. As part of a directed multi-species study throughout the main Hawaiian Islands from 2000 through 2007, we also photo-identified individuals and obtained information 1 Corresponding author. 557 558 MARINE MAMMAL SCIENCE, VOL. 25, NO. 3, 2009 on habitat use and behavior. This species was extremely uncommon (representing only 1.2% of odontocete sightings in directed efforts). Given the low encounter rates, assessing trends of this population cannot be feasibly done with line-transect surveys. Despite their rarity, 80% of the distinctive individuals within groups documented off the island of Hawai'i were seen on multiple occasions, individuals were resighted over periods of up to 21 yr, and there was evidence of year-round use of the area. Association analyses indicate stable long-term associations in mixedsex groups. High resighting rates indicate a small population of island-associated individuals that may be at risk from anthropogenic impacts.

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Observations on a Pygmy Killer Whale (Feresa Attenuata Gray) from Hawaii

Cited by 21 publications

References 1 publication

Movements and Spatial Use of Odontocetes in the Western Main Hawaiian Islands: Results of a Three-Year Study Off O'ahu and Kaua'i

Movements and Spatial Use of Odontocetes in the Western Main Hawaiian Islands: Results of a Three-Year Study Off O'ahu and Kaua'i

The distribution of small odontocete cetaceans off the coasts of South Africa and Namibia

Site fidelity and association patterns of a rare species: Pygmy killer whales (Feresa attenuata) in the main Hawaiian Islands

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