Stomach contents of long-finned pilot whales (Globicephala melas) from southern Chile

Mansilla, Lorena; Olavarría, Carlos; Vega, Marco

doi:10.1007/s00300-012-1222-3

Cited by 12 publications

(14 citation statements)

References 17 publications

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“…Contrasting tissue quality was found between both strandings, which we attribute to the time of sampling of each event. Our sampling of the Isla Clemente stranding took place an estimated two to three months after occurring 33 , while the Isla Navarino individuals were sampled five days after stranding 34 , precluding tissue the deterioration encountered in the former event. This highlights the importance of swift responses to stranding events, in order to secure the best tissue quality possible.…”

Section: Discussionmentioning

confidence: 99%

Global phylogeography and genetic diversity of the long-finned pilot whale Globicephala melas, with new data from the southeastern Pacific

Kraft

Pérez-Álvarez

Olavarría

et al. 2020

Sci Rep

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The matrilineal long-finned pilot whale presents an antitropical distribution and is divided into two subspecies, one in the temperate seas of the Southern Hemisphere and the other restricted to the north Atlantic and Mediterranean. Until now, population genetic and phylogeographic studies have included localities of most of its Northern Hemisphere distribution, while only the southwestern Pacific has been sampled in the Southern Hemisphere. We add new genetic data from the southeastern Pacific to the published sequences. Low mitochondrial and nuclear diversity was encountered in this new area, as previously reported for other localities. four haplotypes were found with only one new for the species. fifteen haplotypes were detected in the global dataset, underlining the species' low diversity. As previously reported, the subspecies shared two haplotypes and presented a strong phylogeographic structure. the extant distribution of this species has been related to dispersal events during the Last Glacial Maximum. Using the genetic data and Approximate Bayesian calculations, this study supports this historical biogeographic scenario. from a taxonomic perspective, even if genetic analyses do not support the subspecies category, this study endorses the incipient divergence process between hemispheres, thus maintaining their status and addressing them as Demographically independent populations is recommended. Cetaceans have a diverse-and many times contrasting-array of geographic distributions. Some of the widest ranging species include the cosmopolitan sperm whale Physeter macrocephalus 1 and the orca Orcinus orca 2. Other species, especially small-sized odontocetes, generally present coastal and more restricted distributions, like the extreme case of the vaquita, Phocoena sinus 3. Some cetaceans have a particular distribution pattern known as disjunct or antitropical, in which the taxon is present at high latitudes in both hemispheres while being absent from lower latitudes 4. Examples include the mysticete genus Eubalaena, with E. borealis inhabiting the North Pacific, E. japonica the North Atlantic and their austral equivalent in the Southern Hemisphere, E. australis 5. The phocoenid species pair Phocoena phocoena and P. spinipinnis is another example, found in the Northern Hemisphere and the coasts of South America, respectively 6. Among delphinids, the two Lissodelphis species also present this antitropical distribution pattern; L. peronii is present around the Southern Hemisphere, while L. borealis is found in the North Pacific 7. A similar antitropical distribution is presented by the two subspecies of long-finned pilot whales Globicephala melas, where G. m. edwardii inhabits the temperate to subpolar waters of the Southern Hemisphere, while G. m. melas is restricted to the North Atlantic 8. Extinct populations of long-finned pilot whales have been reported in the North Pacific, from Japan 9 and Alaska 10 , dating back 8 000-12 000 years and 2 500-3 500 years, respectively 9,10. Pilot whales are a highly social ...

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Section: Discussionmentioning

confidence: 99%

Global phylogeography and genetic diversity of the long-finned pilot whale Globicephala melas, with new data from the southeastern Pacific

Kraft

Pérez-Álvarez

Olavarría

et al. 2020

Sci Rep

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“…In southern Chile, an examination of seven stranded false killer whale carcasses reported only empty stomachs (Haro et al, 2015). Similarly, a study on the diet of long-finned pilot whales from southern Chile (Mansilla et al, 2012) found no plastic particles or marine litter (Carlos Olavarría, personal communication). However, the case of a Risso's dolphin Grampus griseus with a plastic bag in its mouth (Photo by M. Bravo) in the Coastal System of Coquimbo, in northern-central Chile, shows that plastic ingestion by cetaceans should not be ruled out.…”

Section: Marine Mammalsmentioning

confidence: 99%

Impacts of Marine Plastic Pollution From Continental Coasts to Subtropical Gyres—Fish, Seabirds, and Other Vertebrates in the SE Pacific

et al. 2018

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Anthropogenic Marine Debris (AMD) in the SE Pacific has primarily local origins from land-based sources, including cities (coastal and inland), beach-goers, aquaculture, and fisheries. The low frequency of AMD colonized by oceanic biota (bryozoans, lepadid barnacles) suggests that most litter items from coastal waters of the Humboldt Current System (HCS) are pulled offshore into the South Pacific Subtropical Gyre (SPSG). The highest densities of floating micro-and macroplastics are reported from the SPSG. An extensive survey of photographic records, unpublished data, conference proceedings, and published studies revealed interactions with plastics for 97 species in the SE Pacific, including 20 species of fish, 5 sea turtles, 53 seabirds, and 19 marine mammals. Sea turtles are most affected by interactions with plastics, underlined by the fact that 4 of the 5 species suffer both from entanglement and ingestion. Reports gathered in this review suggest that interactions along the continental coast are mostly via entanglement. High frequencies of microplastic ingestion have been reported from planktivorous fish and seabirds inhabiting the oceanic waters and islands exposed to high densities of microplastics concentrated by oceanic currents in the SPSG. Our review also suggests that some species from the highly productive HCS face the risk of negative interactions with AMD, because food and plastic litter are concentrated in coastal front systems. In order to improve the conservation of marine vertebrates, especially of sea turtles, urgent measures of plastic reduction are needed.

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“…On the contrary, Globicephala melas edwardii is circumglobal in the Southern Hemisphere, with records as far north as 14ºS in the Pacific and further south than the Antarctic Convergence, with reports off the Argentinean and Chilean coasts (Clarke and Goodall , Bernard and Reilly , Mansilla et al . ). Oremus et al .…”

Section: List Of Skull Measurements Taken On Long‐finned Pilot Whale mentioning

confidence: 97%

“…, Mansilla et al . , Santos et al . ), three dietary patterns have been suggested for different populations inhabiting North Atlantic waters ( G. m. melas ): (1) diverse diet (≥10 prey species) dominated by squid (Gales and Pemberton , Gannon et al .…”

Section: List Of Skull Measurements Taken On Long‐finned Pilot Whale mentioning

confidence: 99%

Long‐finned pilot whale (Globicephala melas, Traill 1809) subspecies in the Atlantic Ocean: Are there differences in their skulls?

Marina

Marchesi

Goodall

2018

Marine Mammal Science

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Stomach contents of long-finned pilot whales (Globicephala melas) from southern Chile

Cited by 12 publications

References 17 publications

Global phylogeography and genetic diversity of the long-finned pilot whale Globicephala melas, with new data from the southeastern Pacific

Global phylogeography and genetic diversity of the long-finned pilot whale Globicephala melas, with new data from the southeastern Pacific

Impacts of Marine Plastic Pollution From Continental Coasts to Subtropical Gyres—Fish, Seabirds, and Other Vertebrates in the SE Pacific

Long‐finned pilot whale (Globicephala melas, Traill 1809) subspecies in the Atlantic Ocean: Are there differences in their skulls?

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