Results 31 to 40 of about 1,859 (226)

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

open access: yes, 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   +3 more
core   +3 more sources

From coexistence to competitive exclusion: can overfishing change the outcome of competition in skates (Chondrichthyes, Rajidae)?

open access: yesLatin American Journal of Aquatic Research, 2012
Competition for food could be a major force driving changes in the community structure of skates (Rajidae) subjected to fishing exploitation. Under this hypothesis, small skates are released from competition with larger skates after fishing has depleted ...
Natalia L Ruocco   +5 more
doaj   +1 more source

On little known deep-sea skate Bathyraja abyssicola (Gilbert, 1896) from the waters of Russia

open access: yesИзвестия ТИНРО, 2014
Morphological description is given for 38 specimens of rare skate Bathyraja abyssicola caught in the North-West Pacific in the 1974-1989, including juveniles and adults of both sexes.
Vladimir N. Dolganov, Talija T. Ginanova
doaj   +1 more source

Age and growth of Zapteryx brevirostris (Elasmobranchii: Rhinobatidae) in southern Brazil [PDF]

open access: yes, 2018
Age and growth studies are fundamental to successful fisheries management. Zapteryx brevirostris (Muller & Henle, 1841) is distributed off the Brazilian continental shelf and this species is assessed as "Vulnerable" in the Red List of the International ...
Carmo, Wanessa P. D.   +2 more
core   +4 more sources

Development and evolution of dentition pattern and tooth order in the Skates and Rays (Batoidea; Chondrichthyes) [PDF]

open access: yes, 2015
Shark and ray (elasmobranch) dentitions are well known for their multiple generations of teeth, with isolated teeth being common in the fossil record.
Fraser, G.J.   +7 more
core   +12 more sources

Nuevos ejemplares y nuevos registros de peces cartilaginosos (Vertebrata: Chondrichthyes) de la costa del Pacífico mexicano

open access: yesRevista Mexicana de Biodiversidad, 2010
Se reportan nuevos ejemplares y nuevos registros de concurrencia para 10 especies de elasmobranquios previamente desconocidos o con muy poca documentación en aguas del Pacífico mexicano.
Gorgonio Ruiz-Campos   +4 more
doaj   +1 more source

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

open access: yes, 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   +3 more
core   +1 more source

The diet of Antarctic fur seals Arctocephalus gazella (Peters) during the breeding season at Heard Island [PDF]

open access: yes, 1989
Between September 1987 and February 1988, Antarctic fur seals Arctocephalus gazella (Peters) at Heard Island fed mainly on fish with an average 95.2% of scats in monthly collections containing fish remains. Pelagic myctophids constituted more than 50% of
Burton, H.R., Green, K., Williams, R.
core   +1 more source

Species biology of elasmobranch by-catch in bottom-trawl fishery on the northern Patagonian shelf, Argentina

open access: yesAquatic Biology, 2013
The present study analyzes the species composition of elasmobranch by-catch of bottom trawlers that targeted common hake Merluccius hubbsi on the northern and central Patagonian shelf during 2001, 2002 and 2003. Six surveys were conducted, and a total of
AC Crespi-Abril   +3 more
doaj   +1 more source

A nursery site of the Alaska skate (Bathyraja parmifera) in the eastern Bering Sea [PDF]

open access: yes, 2008
A nursery site for the Alaska skate (Bathyraja parmifera) was sampled seasonally from June 2004 to July 2005. At the small nursery site (~2 km2), located in a highly productive area near the shelf-slope interface at the head of Bering Canyon in the ...
Hoff, Gerald R.
core  

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