Results 21 to 30 of about 680 (176)

A new record of Squalus montalbani (Chondrichthyes: Squaliformes: Squalidae) from the Nansha (Spratly) Islands, South China Sea [PDF]

Acta Ichthyologica et Piscatoria, 2023
The Indonesian greeneye spurdog (or a dogfish shark), Squalus montalbani Whitley, 1931, is widely distributed in the warm temperate to tropical waters of Indonesia, Philippines, the island of Taiwan, and Australia.
Mengyi Zhang, Binbin Shan, Yan Liu, Liangming Wang, Changping Yang, Manting Liu, Qijian Xie, Dianrong Sun   +7 more
doaj   +3 more sources

The Phenomenon of Piebaldism in Sharks: A Review of Global Sightings and Patterns. [PDF]

Ecol Evol
Chromatic disorders like piebaldism—a rare form of leucism causing partial pigment loss—have been documented in 25 wild shark cases across 17 species and 11 families, with varying anatomical distribution. This study compiles published and unpublished records to better understand the taxonomic and geographical spread of piebaldism and its potential ...
Whitehead DA, Parmegiani A, Gobbato J, Mizyan M, Askin A, Scroglieri S, Galli P, Seveso D, Montano S, Gayford JH.   +9 more
europepmc   +2 more sources

DNA Barcoding and Species Delimitation for Dogfish Sharks Belonging to the Squalus Genus (Squaliformes: Squalidae)

Diversity, 2022
The Squalus genus comprises a group of small demersal sharks occurring circumglobally, popularly known as dogfish sharks. This genus exhibits a conserved morphology, thus making correct morphological identification difficult.
Ailton A. Ariza, Aisni M. C. L. Adachi, Pollyana Roque, Fabio H. V. Hazin, Marcelo Vianna, Matheus M. Rotundo, Sergio M. Delpiani, Juan M. Díaz de Astarloa, Gabriela Delpiani, Claudio Oliveira, Fausto Foresti, Vanessa P. Cruz   +11 more
doaj   +1 more source

Análise das mordidas de tubarões-charuto, Isistius spp. (Squaliformes: Dalatiidae) em cetáceos (Mammalia: Cetacea) no litoral da Bahia, Nordeste do Brasil. [PDF]

Biotemas, 2007
Poucos estudos registraram sinais de mutilações em cetáceos no Brasil, especialmente aqueles provenientes de ataques de tubarões. O presente trabalho descreve interações entre tubarões-charuto, Isistius spp., e cetáceos através dos registros e análises ...
Luciano Raimundo Alardo Souto, Janete Gomes Abrão Oliveira, José de Anchieta Cintra da Costa Nunes, Rodrigo Maia-Nogueira, Cláudio L. S. Sampaio   +4 more
doaj   +1 more source

Neogene Caribbean elasmobranchs: diversity, paleoecology and paleoenvironmental significance of the Cocinetas Basin assemblage (Guajira Peninsula, Colombia) [PDF]

Biogeosciences, 2019
The Cocinetas Basin is located on the eastern flank of the Guajira Peninsula, northern Colombia (southern Caribbean). During the late Oligocene through the Pliocene, much of the basin was submerged.
J. D. Carrillo-Briceño, J. D. Carrillo-Briceño, Z. Luz, A. Hendy, L. Kocsis, O. Aguilera, T. Vennemann   +6 more
doaj   +1 more source

Comparative morphology and systematics of the cookiecutter sharks, genus Isistius Gill (1864) (Chondrichthyes: Squaliformes: Dalatiidae). [PDF]

PLoS ONE, 2018
The dalatiid genus Isistius Gill (1864) has three valid species currently recognized in the literature: Isistius brasiliensis Quoy & Gaimard (1824), I. plutodus Garrick & Springer (1964), and I. labialis Meng, Zhu & Li (1985). The most common species, I.
Flávia de Figueiredo Petean, Marcelo R de Carvalho   +1 more
doaj   +1 more source

Backward swimming in elongated-bodied abyssal demersal fishes: Synaphobranchidae, Macrouridae, and Ophidiidae. [PDF]

J Fish Biol
Abstract The deep‐sea demersal fish fauna is characterized by a prevalence of elongated‐body forms with long tapering tails. Using baited camera landers at depths of 4500–6300 m in the Pacific Ocean, we observed multiple instances of backward swimming using reverse undulation of the slender body in four species: the cutthroat eel Ilyophis robinsae ...
Priede IG, Jamieson AJ.
europepmc   +2 more sources

First record of little sleeper shark, Somniosus rostratus (Elasmobranchii: Squaliformes: Somniosidae), from the Tunisian coast, central Mediterranean Sea [PDF]

Acta Ichthyologica et Piscatoria, 2020
The first record of the little sleeper shark, Somniosus rostratus (Risso, 1827), from the Tunisian coast, is presented in this note. It was an adult female measuring 990 mm total length and weighing 4500 g.
C. Capapé, S. Rafrafi-Nouira, Y. Diatta, C. Reynaud   +3 more
doaj   +3 more sources

Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus).

PLoS ONE, 2020
The Greenland shark (Somniosus microcephalus, Squaliformes: Somniosidae) is a long-lived Arctic top predator, which in combination with the high historical and modern fishing pressures, has made it subject to increased scientific focus in recent years ...
Julius Nielsen, Rasmus B Hedeholm, Arve Lynghammar, Leon M McClusky, Bjørn Berland, John F Steffensen, Jørgen S Christiansen   +6 more
doaj   +1 more source

Branching patterns of the afferent branchial arteries and their phylogenetic significance in rays (Batoidea)

Scientific Reports, 2021
Rays of the superorder Batoidea comprise the most diverse group of chondrichthyans in terms of valid species and morphological disparity. Up to the present little agreement is observed in studies based on morphological and molecular data focused on ...
Karla D. A. Soares, Mônica Toledo-Piza
doaj   +1 more source