Results 11 to 20 of about 342 (115)

Clicks of dwarf sperm whales (Kogia sima) [PDF]

Marine Mammal Science, 2018
AbstractThe two species of the genusKogiaare widely distributed throughout the world's temperate and tropical oceans, but because they are small and highly cryptic, they are difficult to monitor. The acoustic signals ofK. brevicepshave been described previously, but the signals ofK. simahave remained unknown. Here we present three recordings ofK. sima,
Karlina Merkens, David Mann, Vincent M. Janik, Diane Claridge, Marie Hill, Erin Oleson   +5 more
  +17 more sources

Metagenomic Insights Into the Role of Gut Microbes in the Defensive Ink "Tsunabi" of Physeteroid Whales. [PDF]

Ecol Evol
Whales of the superfamily Physeteroidea exhibit a unique visual defense mechanism involving the release of dark reddish‐brown feces (locally called “tsunabi‐ink” in Japan) into the water. This study proposes that tsunabi‐ink is a metabolic byproduct of shifts in the gut microbial community, influenced by the host's digestive physiology and foraging ...
Takeuchi H, Matsuishi TF, Hayakawa T.
europepmc   +2 more sources

Size Disparity in Putative Primate Adaptive Radiations and Other Mammalian Clades. [PDF]

Am J Biol Anthropol
ABSTRACT Introduction Adaptive radiation is commonly viewed as the rapid production of phenotypic disparity and taxonomic diversity. Among primates, two clades have been identified as potential adaptive radiations: the lemurs of Madagascar and the platyrrhines of the Americas. This study examines these clades for one of the proposed signals of adaptive
Scott JE.
europepmc   +2 more sources

Female, juvenile, and calf sperm whale Physeter macrocephalus (Linnaeus 1758) records from Ireland. [PDF]

Ecol Evol
Ireland has historically been viewed as a region where only male sperm whales were present. There have however been historical records of female and calf sperm whales from 1910 and 1916. More recently, there has been a trend of female strandings in Ireland since 1995 where 7 of the 10 events have taken place since 2013 indicating a shift in the sperm ...
O'Callaghan SA, Griffin B, Levesque S, Gammell M, O'Brien J.   +4 more
europepmc   +2 more sources

Magnetic resonance images of the brain of a dwarf sperm whale (Kogia simus) [PDF]

Journal of Anatomy, 2003
AbstractCetacean (dolphin, whale and porpoise) brains are among the least studied mammalian brains because of the difficulty of collecting and histologically preparing such relatively rare and large specimens. Among cetaceans, there exist relatively few studies of the brain of the dwarf sperm whale (Kogia simus). Magnetic resonance imaging (MRI) offers
L, Marino, K, Sudheimer, D A, Pabst, W A, McLellan, J I, Johnson   +4 more
openaire   +2 more sources

Leveraging Synteny to Generate Reference Genomes for Conservation: Assembling the Genomes of Hector's and Māui Dolphins. [PDF]

Mol Ecol Resour
ABSTRACT Escalating concern regarding the impacts of reduced genetic diversity on the conservation of endangered species has spurred efforts to obtain chromosome‐level genomes through consortia such as the Vertebrate Genomes Project. However, assembling reference genomes for many threatened species remains challenging due to difficulties obtaining ...
Alvarez-Costes S, Baker CS, Constantine R, Carroll EL, Guhlin J, Dutoit L, Ferreira S, Heimeier D, Gemmell NJ, Gillum J, Hamner RM, Rayment W, Roe W, Te Aikā B, Urban L, Alexander A.   +15 more
europepmc   +2 more sources

Records of kogiid whales in Namibia, including the first record of the dwarf sperm whale (Kogia sima) [PDF]

Marine Biodiversity Records, 2013
Dwarf ( Kogia sima ) and pygmy ( K. breviceps ) sperm whales occur in pelagic waters around southern Africa. Here we report the first record of K. sima from Namibia and provide information on the basic morphometrics and diet of that record and of two recent strandings of K. breviceps . All known records (N = 29) of K.
Elwen, Simon Harvey, Gridley, Tess, Roux, J.P. (Jacobus Petrus), Best, Peter B., Smale, Malcolm J.   +4 more
openaire   +2 more sources

Genetic Diversity and Inter-Specific Phylogeny of Three Sympatric Cetacean Species (<i>Stenella</i> spp.) in Thai Territorial Waters Based on Mitochondrial and Nuclear DNA Markers. [PDF]

Ecol Evol
This study investigated the genetic diversity, population structure, and hybridization among three Stenella dolphin species (S. longirostris, S. attenuata, S. coeruleoalba) in Thailand's Andaman Sea using microsatellite loci and mitochondrial DNA from 113 stranded specimens.
Piboon P, Brown JL, Kaewmong P, Kittiwattanawong K, Klinhom S, Yamamoto T, Nganvongpanit K.   +6 more
europepmc   +2 more sources

Histochemical indications for a chemically complex signal produced by the cervical gill slit gland of the pygmy sperm whale (Kogia breviceps). [PDF]

Anat Rec (Hoboken)
Abstract The pygmy sperm whale (Kogia breviceps) possesses an exocrine gland associated with its false gill slit pigmentation pattern. The cervical gill slit gland is a compound tubuloalveolar gland that produces a holocrine secretion and displays maturational changes in size and secretory histology. While the morphology of the cervical gill slit gland
Keenan TF, McLellan WA, Rommel SA, Costidis AM, Harms CA, Thewissen JGM, Rehorek SJ, Rotstein DS, Gay MD, Taylor AR, Koopman HN, Wang Y, Kamel S, Pabst DA.   +13 more
europepmc   +2 more sources

First records of dwarf sperm whale (Kogia sima) from the Union of the Comoros [PDF]

Marine Biodiversity Records, 2016
The world distribution of dwarf and pygmy sperm whales (Cetacea: Kogiidae) [Kogia spp.] is poorly known, and derived mostly from records of stranded animals. At sea, both species are elusive and difficult to identify. We photo-documented the presence of dwarf sperm whale (Kogia sima) in the waters of the Union of the Comoros. All three occurrences were
Bonato, Marco, Webber, Marc A., Attoumane, Artadji, Giacoma, Cristina   +3 more
openaire   +2 more sources