Results 21 to 30 of about 1,528 (194)

Shearing Tooth Morphology May Allow Sharks to Access Higher Trophic Levels at Smaller Sizes. [PDF]

Ecol Evol
Predator morphology imposes limitations on prey selection due to biomechanical constraints, making some prey functionally inaccessible and thereby constraining predator trophic niches. We assessed how two key components of trophic morphology—tooth shape and body size—affect prey selectivity and trophic niche in two sympatric sharks with contrasting ...
Riverón S, Raoult V, Slip DJ, Mas F, Laporta M, Pereyra I, Silveira S, Harcourt RG.   +7 more
europepmc   +2 more sources

Triakidae J.E.Gray 1851

, 2021
Family Triakidae Three houndshark species have been previously recorded from Bangladesh, i.e. Mustelus manazo, M. mosis and Iago garricki (Hoq et al. 2011; Habib et al. 2020).A total of 31 specimens of a second species of the Iago omanensis complex (which includes the poorly defined I. mangalorensis, if considered valid (Sen et al.
Haque, Alifa Bintha, White, William T., Cavanagh, Rachel D., Biswas, Aparna Riti, Hossain, Nazia   +4 more
openaire   +2 more sources

Multiple paternity and hybridization in two smooth-hound sharks [PDF]

, 2015
Multiple paternity appears to be a common trait of elasmobranch mating systems, with its occurrence likely driven by convenience, due to females seeking to minimize the stress of male harassment.
Gristina, Michele, Marino, ILARIA ANNA MARIA, Mazzoldi, Carlotta, Rasotto, MARIA BERICA, Riginella, Emilio, Zane, Lorenzo   +5 more
core   +1 more source

Consumption of shark products: The interface of sustainability, trade (mis)labelling, human health and human rights

Fish and Fisheries, Volume 24, Issue 5, Page 777-795, September 2023., 2023
Abstract Sharks and rays evolved 450 million years ago, during the Late Ordovician Period. However, during the modern Anthropocene, shark populations have declined at considerable rates, and recent global assessments indicate about one in three species is threatened with extinction.
Md Robiul Hasan, Jennifer A. Chaplin, Peter B. Spencer, Matias Braccini   +3 more
wiley   +1 more source

Shark and ray teeth from the Hauterivian (Lower Cretaceous) of north-east England [PDF]

, 1999
Sampling of hiatal horizons within the Hauterivian part of the Speeton Clay Formation of north-east England has produced teeth of several species of sharks and rays, four of which are previously unnamed.
Mitchell, S.F., Underwood, Charlie J., Veltkamp, K.J.   +2 more
core   +1 more source

Tight spatial coupling of a marine predator with soniferous fishes: Using joint modelling to aid in ecosystem approaches to management

Diversity and Distributions, Volume 29, Issue 8, Page 1074-1089, August 2023., 2023
Abstract Aim Understanding the distribution of marine organisms is essential for effective management of highly mobile marine predators that face a variety of anthropogenic threats. Recent work has largely focused on modelling the distribution and abundance of marine mammals in relation to a suite of environmental variables.
Sarah M. Roberts, Ann‐Marie Jacoby, Jason J. Roberts, Jaelyn Leslie, Khadijah L. Payne, Andrew J. Read, Patrick N. Halpin, Susan Barco, Lance Garrison, William McLellan, Debra Palka, Janet A. Nye   +11 more
wiley   +1 more source

Age and growth of the highly exploited narrownose smooth-hound (Mustelus schmitti) (Pisces: Elasmobranchii) [PDF]

, 2017
The narrownose smoothhound (Mustelus schmitti) is the most exploited elasmobranch of Argentina, Brazil, and Uruguay and is considered endangered (IUCN Red List of Threatened Species).
Blasina, Gabriela Elizabeth, Lopez Cazorla, Andrea Cecilia, Molina, Juan Manuel   +2 more
core   +1 more source

Operant conditioning as a tool to assess hearing abilities in sharks

Journal of Fish Biology, Volume 103, Issue 2, Page 411-424, August 2023., 2023
Abstract Sharks (elasmobranchs) are an ancient, diverse group of fishes, representing a basal stage in the evolution of vertebrate hearing. Yet, our understanding of behavioural measures of hearing abilities in sharks is limited. To address this, an operant conditioning paradigm was designed, and scalloped hammerhead Sphyrna lewini and rig (spotted ...
Carolin Nieder, Jimmy Rapson, Kim Holland, Carl Meyer, John Montgomery, Craig Radford   +5 more
wiley   +1 more source

Barremian and Aptian (Cretaceous) sharks and rays from Speeton, Yorkshire, north-east England [PDF]

, 2004
Bulk sampling of a number of horizons within the upper part of the Speeton Clay Type section has produced teeth and other remains of sharks and rays from several poorly studied horizons.
Applegate, Ayres, Batchelor, Berg, Biddle, Biddle, Bonaparte, C. J. Underwood, Cappetta, Cappetta, Cappetta, Cappetta, Casier, Compagno, de Blainvile, Duffin, Gill, Glickman, Herman, Herman, Kriwet, Müller, Pictet, Regan, Schmitz, Siverson, Siverson, Stinton, Thies, Thies, Thiolliere, Underwood, Underwood, Ward, Woodward   +34 more
core   +1 more source

A preliminary study of age and growth of the smoothhound shark Mustelus mustelus (Triakidae) [PDF]

South African Journal of Marine Science, 1997
Age and growth of the smoothhound shark Mustelus mustelus was investigated from banding patterns in sectioned vertebral centra of 136 specimens, using a modified Alizarin red S technique to stain bands on thecentra. Fabensf method (Lt = L‡ . (L‡ .
Goosen, AJJ, Smale, MJ
openaire   +2 more sources