Results 51 to 60 of about 316 (140)

Diversity, occurrence and conservation of sharks in the southern South China Sea.

PLoS ONE, 2019
Sharks constitute a vital sector of marine and estuarine nekton and are of great commercial importance all over the world. International concern over the fate of shark fisheries has grown recently.
Takaomi Arai, Azie Azri
doaj   +1 more source

Can denticle morphology help identify southeastern Australian elasmobranchs?

Journal of Fish Biology, Volume 104, Issue 6, Page 1848-1859, June 2024.
Abstract Elasmobranchs are covered in scale‐like structures called dermal denticles, comprising dentine and enameloid. These structures vary across the body of an individual and between species, and are frequently shed and preserved in marine sediments.
Mariah Appleby, Vincent Raoult, Matt K. Broadhurst, Troy Gaston   +3 more
wiley   +1 more source

Comparison of traditional and molecular surveys of fish biodiversity in southern Te Wāhipounamu/Fiordland (Aotearoa/New Zealand)

Environmental DNA, Volume 6, Issue 1, January–February 2024.
At the remote UNESCO Word Heritage Site Te Wāhipounamu, we show that eDNA analysis is a highly sensitive tool with strong potential for biodiversity surveys, which is still limited by the unavailability of local reference data. We hope that by demonstrating the extend of divergence between eDNA and more traditional tools in a real‐life case study of a ...
Paul Czechowski, Michel de Lange, Michael Heldsinger, Anya Kardailsky, Will Rayment, Christopher Hepburn, Monique Ladds, Michael Knapp   +7 more
wiley   +1 more source

БИОСТРАТИГРАФИЯ И ИЗМЕНЕНИЕ ПАЛЕОБИОТЫ НА ГРАНИЦЕ ПАЛЕОЦЕНА И ЭОЦЕНА В РАЗРЕЗЕ ПЕРШИНСКИЙ (СРЕДНЕЕ ЗАУРАЛЬЕ)

Литосфера, 2019
Выполнено описание разреза и биостратиграфическое расчленение палеогеновых отложений в разрезе Першинский, расположенном в южной части Среднего Зауралья (Курганская область). Проанализированы изменения состава морской микро- (динофлагеллаты) и макробиоты

doaj  

Earliest Danian outer neritic elasmobranch assemblages reveal an environmentally controlled faunal turnover at the Cretaceous–Palaeogene boundary in the northern Tethyan Realm (Austria)

Papers in Palaeontology, Volume 10, Issue 1, January/February 2024.
Abstract This study reports elasmobranch remains from two fossil‐rich horizons in the earliest Danian Olching Formation at Waidach, Austria. These outer neritic assemblages complement previous fine‐scale bulk‐sampling of latest Maastrichtian horizons at Waidach and document a regional elasmobranch faunal turnover across the Cretaceous–Palaeogene (K–Pg)
Iris Feichtinger, Jürgen Pollerspöck, Mathias Harzhauser, Gerald Auer, Stjepan Ćorić, Matthias Kranner, Bernhard Beaury, Guillaume Guinot   +7 more
wiley   +1 more source

Occurrence of the narrowmouth catshark Schroederichthys bivius (Chondrichthyes: Scyliorhinidae) in southern Brazil

Marine Biodiversity Records, 2014
The Scyliorhinidae is a large family of sharks distributed in the Atlantic, Pacific and Indian Oceans (Compagno et al., 2005). Four species of catsharks of the genus Schroederichthys are endemic to South America: Schroederichthys tenuis Springer, 1966 (northern Brazil to Suriname); S. chilensis Guichenot, 1848 (southern Chile to Peru); S.
Hugo Bornatowski, Lilyane Santos, Maurício De Castro Robert, Pedro Amadeus Weiser   +3 more
openaire   +1 more source

TRYPANOSOMA HUMBOLDTI EN SCHROEDERICHTHYS CHILENSIS (CHONDRICHTHYES, ELASMOBRANCHII, SCYLIORHINIDAE) COMO INDICADOR NO DESTRUCTIVO DE CONTAMINACION TRYPANOSOMA HUMBOLDTI IN SCHROEDERICHTHYS CHILENSIS (CHONDRICHTHYES, ELASMOBRANCHII, SCYLIORHINIDAE) AS NON DESTRUCTIVE INDICATOR OF CONTAMINATION

Gayana, 2005
La contaminación de las zonas costeras por la actividad humana es un problema que se ha incrementado en Chile, siendo caleta Lenga una de las zonas más contaminadas del país.
Víctor Silva, Ariel Valenzuela, Paulo Ruiz, Ciro Oyarzún   +3 more
doaj  

Dichichthyidae, a New Family of Deepwater Sharks (Carcharhiniformes) from the Indo–West Pacific, with Description of a New Species

Fishes
The genus Dichichthys was resurrected for five species previously allocated to the genus Parmaturus in the family Pentanchidae. Supraorbital crests on the chondrocranium distinguish Dichichthys from Parmaturus and other members of the family Pentanchidae.
William T. White, Andrew L. Stewart, Helen L. O’Neill, Gavin J. P. Naylor   +3 more
doaj   +1 more source

New records of the lollipop catshark Cephalurus cephalus (Scyliorhinidae) from the Gulf of California, Mexico Nuevos registros del tiburón renacuajo Cephalurus cephalus (Scyliorhinidae) en el golfo de California, México

Revista Mexicana de Biodiversidad, 2012
On February 11th 2007, 13 neonates and 4 adults of Cephalurus cephalus were collected using a benthic sledge, during one oceanographic cruise (Talud X, St. 12) in the mid Gulf of California, Mexico (28°01'36" N, 111°51'50" W). The lollipop catsharks were
Hugo Aguirre-Villaseñor, Carolina Salas-Singh   +1 more
doaj  

Temporal niche partitioning as a potential mechanism for coexistence in two sympatric mesopredator sharks

Frontiers in Marine Science
Global marine biodiversity declines require bold and ambitious plans to safeguard ecosystem services. Overfishing, habitat loss and projected climate impacts have yielded deleterious effects on marine predators, in particular, driving increasing threat ...
Neil D. Cook, Abbie Jenkins, Sarah L. Perry, Sarah E. Perkins, Jo Cable   +4 more
doaj   +1 more source