Results 21 to 30 of about 3,259 (192)

El sistema reproductor femenino de Zearaja chilensis (Guichenot, 1848) (Chondrichthyes, Rajidae): Gametogénesis y validación microscópica de los criterios de madurez [PDF]

, 2015
Los condrictios son extremadamente susceptibles a la explotación pesquera debido, entre otras cosas, a sus adaptaciones reproductivas. Los conocimientos básicos de sus parámetros reproductivos son esenciales, ya sea desde el punto de vista ecológico como
Di Giacomo, Edgardo Ernesto, Galíndez, Elena Juana, Wehitt, Anahi   +2 more
core   +1 more source

Foliculogénesis Ovárica en la Raya Marmorada, Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes, Rajidae) [PDF]

, 2011
Los Condrictios se han convertido en un recurso económico importante en las últimas décadas, siendo Argentina uno de los países que más explota tiburones y rayas, incluso a niveles que exceden los límites de varias especies.
Díaz Andrade, María Constanza, Estecondo, Silvia, Galíndez, Elena Juana, Lopez Cazorla, Andrea Cecilia   +3 more
core   +1 more source

Bacterial community dynamics during embryonic development of the little skate (Leucoraja erinacea)

Animal Microbiome, 2021
Background Microbial transmission from parent to offspring is hypothesized to be widespread in vertebrates. However, evidence for this is limited as many evolutionarily important clades remain unexamined.
Katelyn Mika, Alexander S. Okamoto, Neil H. Shubin, David B. Mark Welch   +3 more
doaj   +1 more source

Description of the egg capsule of Atlantoraja castelnaui (Elasmobranchii, Rajidae)

Brazilian Journal of Oceanography, 2008
María Cristina Oddone, Alejo Mesa, Alberto Ferreira de Amorim   +2 more
doaj   +3 more sources

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

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

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

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

Using citizen science photographs to identify reproductive events in an oviparous elasmobranch. [PDF]

J Fish Biol
Abstract Identifying critical habitats is important for the effective management of vulnerable species. Critical habitats, such as mating or nursery grounds, support populations during key life stages and help to maximise reproductive output and population growth. In elasmobranchs, mating often happens over a defined season, suggesting sites associated
Mawer R, Dodd J, Thorburn J, Burns NM, Bailey DM.   +4 more
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