gonochoric/gonochoristic/dioecious (sexes separate), Proceedings of the Royal Society of London, "IUCN 2008 Red List - Mesoplodon perrini", 2008, © 2020 Regents of the University of Michigan. However, as this is apparently quite similar in all Mesoplodon, a number of well-founded assumptions can be made. A Comprehensive and Validated Molecular Taxonomy of Beaked Whales, Family Ziphiidae.

All members of this family, except Blainville’s beaked whales, are difficult to distinguish from each other, and study by museum experts is usually necessary for identification. N. (Cetacea: Ziphiidae) Discovered Through Phylogenetic Analyses of Mitochondrial DNA Sequences. However, the combination of small size, appearance and presumed range makes a confusion unlikely. Beaked Whales (Family Hyperoodontidae) These medium-sized to moderately large whales have a single pair of grooves on their throats. The other "Hector's" specimens from California were subsequently confirmed to belong to the same undescribed taxon (Dalebout 2002). "Mesoplodon perrini" (On-line), Animal Diversity Web. Grants DRL 0089283, DRL 0628151, DUE 0633095, DRL 0918590, and DUE 1122742. A New Species of Beaked Whale Mesoplodon perrini Sp. Since 1998, The MarineBio Conservation Society has been a nonprofit volunteer marine conservation and science education group working online together to educate the world about ocean life, marine biology, marine conservation, and a sea ethic. Perrin’s beaked whale As of May 2019, only six specimens of Perrin’s beaked whales have ever been examined. Geographic Range At present, Perrin's beaked whales (Mesoplodon perrini) are only found in the northern Pacific Ocean.Four of the five known specimens of this whale species were found stranded along the coast of southern California within 85 kilometers of one another in the late 1970's.

Beaked whales echolocate on prey. Mammalian Species, 250: 1-6. The coloration is dark gray above and white below in the holotype male, with a lighter gray underside of the tail fluke. The first two specimens were found in May 1975 stranded on the California coast, with two more specimens being found in 1978 and 1979, and the last in September 1997.

From Infogalactic: the planetary knowledge core.

The two species were thought to be the same until as recently as 2002 when genetic data was analyzed based on the 5 individuals found stranded along the coast of California (between 33°55’N, 117°15’W and 36°37’N, 121°55’W from May 1975 to September 1997). (Dalebout, et al., 2002), The only known predators of Mesoplodon perrini are sharks and humans. The adult female was approximately 4.4 meters from nose to tail, while the adult male was 3.9 meters in length. identified as Hector’s beaked whales M. hectori and the fifth as Ziphius cavirostris. Few stomach contents were available for analysis. Members of this species are probably too rare to have a significant negative impact on humans. However, based on the molecular characters, Dalebout et al. Many species are known only from a few specimens, and little is known about the life history and biology of the group. Teeth were not present in the immatures[verification needed], but they are not needed for feeding. Iteroparous animals must, by definition, survive over multiple seasons (or periodic condition changes). (Dalebout, et al., 2002), Although little is known about how Mesoplodon perrini communicates, research on other Marine Mammal Science 18:577-608. These specimens provided data which erroneously has been published as referring to, File:Mesoplodon perrini distribution 1975-1997.png, Whale & Dolphin Conservation Society (WDCS), https://infogalactic.com/w/index.php?title=Perrin%27s_beaked_whale&oldid=508516, Automatic taxoboxes using binomial parameter, Wikipedia articles needing factual verification from July 2007, Creative Commons Attribution-ShareAlike License, About Infogalactic: the planetary knowledge core, Locations and dates of strandings (yellow). Pp. study involving tagged Mesoplodon densirostris found that these animals are very vocal, most frequently emitting ultrasonic clicks that are well outside the range of human hearing. The other three specimens were juvenile males, which were measured at 2.1, 2.2, and 2.4 meters. Although this suggests an eastern distribution within the North Pacific, there is currently too little information to come to any firm conclusions. The causes of death of two animals can be tentatively inferred; the 1997 specimen was starving at the time of death, possibly following a parasite infection (Dalebout et al.