Results 1 to 10 of about 370 (97)

Reproductive biology of Sympterygia bonapartii (Chondrichthyes: Rajiformes: Arhynchobatidae) in San Matías Gulf, Patagonia, Argentina [PDF]

Neotropical Ichthyology, 2017
This study estimates and analyses the reproductive parameters and cycle of Sympterygia bonapartii in San Matías Gulf, northern Patagonia, Argentina. A total of 827 males and 1,299 females were analysed. Males ranged from 185 to 687 mm of total length (TL)
María L. Estalles, María R. Perier, Edgardo E. Di Giácomo   +2 more
doaj   +5 more sources

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

Neotropical Ichthyology, 2018
We analyzed growth and reproduction of captive-born smallnose fanskates Sympterygia bonapartii. Egg cases were obtained from oviposition of two females caught in the wild and held at Temaikèn Aquarium.
Julieta A. Jañez, Fernando J. Meijide, Luis O. Lucifora, Carolina Abraham, Federico Argemi   +4 more
doaj   +10 more sources

Morphological study of the oviductal gland in the smallnose fanskate Sympterygia bonapartii (Müller and Henle, 1841) (Chondrichthyes, Rajidae) [PDF]

Brazilian Journal of Biology, 2010
The oviductal gland is an exclusive structure of cartilaginous fishes that produces the egg jelly, forms the tertiary egg envelopes and stores sperm.
EJ Galíndez, MC. Díaz-Andrade, MS. Avaca, S. Estecondo   +3 more
doaj   +6 more sources

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

International Journal of Morphology, 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   +6 more sources

Características histológicas del útero de Sympterygia acuta (Garman, 1877) y Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes; Rajidae) [PDF]

International Journal of Morphology, 2013
Los condrictios constituyen un clado sumamente conservado y vulnerable a la explotación, que ha cobrado una importancia creciente en los últimos años. Sin embargo, existe poca información sobre los aspectos morfológicos relacionados con la reproducción ...
Díaz Andrade, María Constanza, Galíndez, Elena Juana, Lopez Cazorla, Andrea Cecilia   +2 more
core   +6 more sources

Reproductive biology of the skates Sympterygia acuta Garman, 1877 and S. bonapartii Müller & Henle, 1841 (Chondrichthyes: Rajoidei) in south Brazil [PDF]

Neotropical Ichthyology, 2014
The present study analyzed the sexual development, sizes at maturity and morphometric relationships for both sexes of Sympterygia acutaand S. bonapartii, endemic of south-western Atlantic Ocean.
Alexander Basallo, Maria Cristina Oddone
doaj   +4 more sources

Comparative assessment of digestive enzyme activities of five fish species from the southwestern Atlantic Ocean [PDF]

Marine and Fishery Sciences
Due to the scarcity of data cited in the literature, digestive enzyme profiles of fish species from the southwestern Atlantic Ocean are of particular interest.
María Cecilia Bonadero, María Victoria Laitano, Juana Cristina del Valle, Yamila Eliana Rodriguez, Nair de los Angeles Pereira, Analia Fernández-Gimenez   +5 more
doaj   +4 more sources

Tapeworms (Platyhelminthes, Cestoda) from marine chondrichthyans of the Southwestern Atlantic Ocean, and the sub-Antarctic and Antarctic islands: a checklist. [PDF]

Zookeys, 2023
A parasite-host list of cestodes parasitizing chondrichthyans in the Southwest Atlantic off Argentina and surrounding waters of Antarctica is compiled based on the available literature.
Franzese S, Facal GG, Menoret A.
europepmc   +4 more sources

Morfología de los estados embrionarios tardíos y cápsula ovígera de Sympterygia brevicaudata (Rajiformes: Arhynchobatidae) en el norte de Chile [PDF]

Revista de biologia marina y oceanografia
The morphology of the egg capsule and embryonic stages of Sympterygia brevicaudata are described. A total of 144 egg capsules were collected stranded on the beach and by scuba diving at a depth between 3 and 10 m, from Arica and Taltal, northern Chile ...
Mundaca, Enrique A., Méndez-Abarca, Felipe, Pepe-Victoriano, Renzo   +2 more
core   +3 more sources

From fresh water to the slope: fish community ecology in the Río de la Plata and the sea beyond [PDF]

, 2010
The spatial pattern of fish assemblages and its relationship with factors along an environment gradient, from fresh to marine water environment along the Río de la Plata estuary (36ºS, 56ºW) the shelf and part of the slope, was examined using data from ...
García, Mirta L., Jaureguizar, Andrés Javier, Protogino, Lucila C.   +2 more
core   +13 more sources