Results 31 to 40 of about 3,658 (231)

Reproductive biology of the eyespot skate atlantoraja cyclophora (Elasmobranchii: Arhynchobatidae) an endemic species of the southwestern atlantic ocean (34ºs - 42ºS) [PDF]

, 2018
Atlantoraja cyclophora is an endemic skate to the continental shelf of the Southwestern Atlantic Ocean (22ºS-47ºS) and a bycatch species in commercial bottom trawl fisheries. The morphometric relationships, the size at maturity and the reproductive cycle
Colonello, Jorge Horacio, Galíndez, Elena Juana, Macchi, Gustavo Javier, Wehitt, Anahi   +3 more
core   +3 more sources

Resolving taxonomic uncertainty in vulnerable elasmobranchs : are the Madeira skate (Raja maderensis) and the thornback ray (Raja clavata) distinct species? [PDF]

, 2016
Skates and rays constitute the most speciose group of chondrichthyan fishes, yet are characterised by remarkable levels of morphological and ecological conservatism.
A Lynghammar, AK Finnegan, AM Griffiths, AM Griffiths, Andrew F. Johnson, Andrew M. Griffiths, AP Martin, B Serra-Pereira, Barbara Serra-Pereira, C Moritz, Catherine S. Jones, CR Darwin, D Bickford, D Darriba, D Ebert, David W. Sims, DJ Futuyma, E Mabragaña, E Mayr, E Mayr, E Mayr, E Valsecchi, F Rogl, Francis Neat, G Hoarau, GJ Naylor, Gui Menezes, IB Spies, J Mallet, J Provan, J Rozas, JA Coyne, JD McEachran, Jennifer Lewis, Jim Ellis, JL Olsen, K Brander, K Tamura, K Tamura, KL Chiquillo, L Excoffier, Leslie R. Noble, M Chevolot, M Gonzalez-Wanguemert, M Hasegawa, M Kimura, M Kroese, M Pritchard, M Stehmann, Martin J. Genner, MW Coulson, N Mnasri, NK Dulvy, NK Dulvy, NK Dulvy, P Pasolini, P Villesen, PA Walker, PDN Hebert, R Meier, Rachel E. Ball, RD Ward, RD Ward, RE Ball, Rob Leslie, S Duggen, S Gavrilets, S Guindon, S Stefanni, Samuel Iglésias, SP Iglésias, Stefano Mariani, TA Hall, W Salzburger, WF Cannon   +74 more
core   +8 more sources

The contribution of isopods in the feeding of Sympterygya spp (pisces: rajidae) with a description of Ancinus gaucho sp. n. (isopoda: sphaeromatidae)

Brazilian Journal of Oceanography, 1987
The present paper deals with the isopods present in the stomach content of Sympterygia acuta and S. bonapartei, two species of Rajidae frequently found along Rio Grande do Sul coast.
Ana Maria Setubal Pires
doaj   +1 more source

Morphology of the unique egg cases of hornsharks (Heterodontiformes: Heterodontidae). [PDF]

J Fish Biol
Abstract Many of the egg cases of oviparous chondrichthyans remain unknown and undescribed in the literature. Egg cases can be a useful taxonomic character for species distinction and can be a valuable indicator of a species distribution in the field.
O'Neill HL, Tokunaga K, White WT.
europepmc   +2 more sources

Revision of the fossil batomorphs from the Cretaceous of Lebanon, and their impact on our understanding of the early step of the evolution of the clade [PDF]

Research & Knowledge, 2017
Lebanon is endowed with its outstanding preservation lagerstätten of fossil fish from the Upper Cretaceous. The batomorphs are represented by 16 species of Rajiformes belonging to 9 genera and 4 families however, their phylogeny remains poorly understood.
Georges Kachacha, Gilles Cuny, Dany Azar, Pierre Abi Saad   +3 more
doaj   +1 more source

Feeding ecology of elasmobranch species in southeastern Brazil

Neotropical Ichthyology, 2017
The feeding ecology of five elasmobranch species was studied on the southern coast of Rio de Janeiro, southwestern Atlantic Ocean. The specimens were caught with a trawl or bottom longline between January 2006 and August 2007.
Alessandra F. Viana, Jean L. Valentin, Marcelo Vianna   +2 more
doaj   +1 more source

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

Growth and reproduction in captivity unveils remarkable life-history plasticity in the smallnose fanskate, Sympterygia bonapartii (Chondrichthyes: Rajiformes) [PDF]

, 2018
Analizamos el crecimiento y la reproducción de ejemplares de raya marmorada, Sympterygia bonapartii nacidas en cautiverio. Se obtuvieron ovicápsulas a partir de la oviposición de dos hembras capturadas en la naturaleza y mantenidas en el Acuario Temaikèn.
Abraham, Carolina, Argemi, Federico, Jañez, Julieta, Lucifora, Luis Omar, Meijide, Fernando Javier   +4 more
core   +3 more sources

Effects of hypoxia on benthic macrofauna and bioturbation in the Estuary and Gulf of St. Lawrence, Canada [PDF]

, 2010
The bottom water in the 4300 m deep Lower St. Lawrence Estuary (LSLE) is persistently hypoxic in contrast to the normoxic bottom waters in the Gulf of St. Lawrence (GSL). We photographed the seabed at 11 stations in the Estuary and Gulf of St.
Archambault, Philippe, Belley, Rénald, Gagnon, Jean-Marc, Gilbert, Franck, Sundby, Bjorn   +4 more
core   +4 more sources

The role of sand lances (Ammodytes sp.) in the Northwest Atlantic ecosystem: a synthesis of current knowledge with implications for conservation and management [PDF]

, 2020
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Staudinger, M. D., Goyert, H., Suca, J. J., Coleman, K., Welch, L., Llopiz, J.
Altman, Irit, Applegate, Andew, Auster, Peter J., Baumann, Hannes, Beaty, Julia, Boelke, Deirdre, Coleman, Kaycee, Goyert, Holly, Kaufman, Les, Llopiz, Joel K., Loring, Pam, Moxley, Jerry, Paton, Suzanne, Powers, Kevin, Richardson, David E., Robbins, Jooke, Runge, Jeffrey A., Smith, Brian, Spiegel, Caleb, Staudinger, Michelle D., Steinmetz, Halley, Suca, Justin J., Welch, Linda, Wiley, David N.   +23 more
core   +1 more source