Results 71 to 80 of about 1,448 (172)

Pesquería y biología de Rhinobatos percellens (Rajiformes: Rhinobatidae) capturados por la pesquería artesanal de playa La Pared, Venezuela Fishery and biology of Rhinobatos percellens (Rajiformes: Rhinobatidae) caught by the artisanal fishery at La Pared beach, Venezuela

open access: yesRevista de Biología Tropical, 2013
Rhinobatos percellens es capturada en Venezuela por la flota artesanal que opera con redes de fondo. Está clasificada por la IUCN como casi amenazada, y no existen estudios sobre su biología o pesquería en el país. Por ello, se analizaron desembarques de
Alejandro Tagliafico   +2 more
doaj  

Shark fishing in India [PDF]

open access: yes, 1996
From time immemorial sharks have been the object of amusement for the sea faring men and anglers and they were fished for sports. At certain times of history they were dreaded as monsters of the sea because of the ravage they wrought on bathers ...
Devadoss, P
core  

Lamniform shark teeth from the Late Cretaceous of southernmost South America (Santa Cruz Province, Argentina) [PDF]

open access: yes, 2014
Here we report multiple lamniform shark teeth recovered from fluvial sediments in the (Campanian-Maastrichtian) Cerro Fortaleza Formation, Santa Cruz Province, Argentina.
Egerton, Victoria M.   +3 more
core   +2 more sources

Length-weight relationships of commercially important marine fishes and shellfishes of the southern coast of Karnataka, India [PDF]

open access: yes
The parameters of the length-weight relationship of the form W = aLb are presented for 51 species of commercially important marine fishes and shellfishes caught along the southern coast of Karnataka, India.
Abdulrahiman, K.P.   +3 more
core  

The eyes of suckermouth armoured catfish (Loricariidae, subfamily Hypostomus): pupil response, lenticular longitudinal spherical aberration and retinal topography [PDF]

open access: yes, 2002
The dilated, round pupils of a species of suckermouth armoured catfish (Liposarcus pardalis) constrict slowly on illumination (over 35-40 min) to form crescent-shaped apertures. Ray tracing of He-Ne laser beams shows that the lenses of a related species (
Collin, S. P.   +2 more
core  

Dinâmica populacional das raias-violas, Rhinobatos horkelli, Rhinobatidae percellens e Zapteryx brerostris (Chondrichthyes, Rhinobatidae) da plataforma continental de São Paulo

open access: yes, 2015
Guitarfishes (Elamobranchii, Rhinobatiformes) are usually components of the multispecific fishery as by-catch of double-rig, pair and single bottom trawls in the southeast and south of Brazil (Martins & Schwingel, 2003). Considering the lack of life history parameters on the age and population structure studies of these species there is therefore a ...
openaire   +2 more sources

Multiple Cone Visual Pigments and the Potential for Trichromatic Colour Vision in Two Species of Elasmobranch [PDF]

open access: yes, 2004
Elasmobranchs (sharks, skates and rays) are the modern descendents of the first jawed vertebrates and, as apex predators, often occupy the highest trophic levels of aquatic (predominantly marine) ecosystems.
Collin, Shaun P.   +3 more
core   +1 more source

Unusual heavy landing of rays and skates at Tuticorin Fisheries Harbour [PDF]

open access: yes, 2010
Tuticorin coast is known for the rich elasmobranch resources consisting of sharks, rays and skates. However, the landing of the resource was declining over the years. Elasmobranchs are mainly caught by trawlers, hooks and line and gillnets.
Kanthan, K P, Zacharia, P U
core  

Molecular taxonomy of guitarfishes (Rhinobatidae: Acroteriobatus)

open access: yes
Abstract Guitarfish species (genus Acroteriobatus) display restricted distributions in undermanaged regions of intense fishing pressure, which is exacerbated by taxonomic uncertainty due to morphological similarity. The importance of accurate specimen identification is well established, especially in the context of conservation management ...
Mia Jo Groeneveld   +9 more
openaire   +1 more source

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