Results 81 to 90 of about 1,443 (143)

Age validation, growth, mortality, and demographic modeling of spotted gully shark (Triakis megalopterus) from the southeast coast of South Africa [PDF]

open access: yes, 2011
This study documents validation of vertebral band-pair formation in spotted gully shark (Triakis megalopterus) with the use of fluorochrome injection and tagging of captive and wild sharks over a 21-year period.
Booth, Anthony J.   +2 more
core   +1 more source

Two new species of Halysioncum Caira, Marques, Jensen, Kuchta et Ivanov, 2013 (Cestoda, Diphyllidea) from Indo-Pacific rays of the genus Aetomylaeus Garman (Myliobatiformes, Myliobatidae) [PDF]

open access: yes, 2013
: Recent collections of cestode parasites from two species of the myliobatid genus Aetomylaeus Garman from several localities in the Pacific Ocean resulted in the discovery of two new species of Halysioncum Caira, Marques, Jensen, Kuchta et Ivanov ...
Euzet   +9 more
core   +1 more source

Field guide to requiem sharks (Elasmobranchiomorphi: Carcharhinidae) of the Western North Atlantic [PDF]

open access: yes, 2001
Identification problems are common for many sharks due to a general lack of meristic characteristics that are typically useful for separating species. Other than number of vertebrae and number and shape of teeth, identifications are frequently based on ...
Grace, Mark
core  

Determination of limited histotrophy as the reproductive mode in Mustelus schmitti Springer, 1939 (Chondrichthyes: Triakidae): analysis of intrauterine growth of embryos

open access: yesNeotropical Ichthyology
This work analyzed length-mass relationship, growth in length, mass variations and dynamic of yolk sac depletion of Mustelus schmitti embryos, extracted from females catched by the artisanal fishery acting off La Paloma (34°39'S, 54°10'W, Uruguay) during
Luis Orlando   +5 more
doaj   +1 more source

Eutetrarhynchid trypanorhynchs (Cestoda) from elasmobranchs off Argentina, including the description of Dollfusiella taminii sp. n. and Parachristianella damiani sp. n., and amended description of Dollfusiella vooremi (São Clemente et Gomes, 1989) [PDF]

open access: yes, 2014
During a parasitological survey of teleosts and elasmobranchs in the Argentine Sea, 3 species of eutetrarhynchids were collected from the batoids Myliobatis goodei Garman and Psammobatis bergi Marini, and the shark Mustelus schmitti Springer.
Andreeva, Elena   +5 more
core   +5 more sources

Testicular histology of Mustelus schmitti springer, 1939 (Elasmobranchii, triakidae) [PDF]

open access: yes, 2013
Mustelus schmitti presenta unos testiculos de desarrollo diametrico en la que espermatocistos forma redonda muestran una disposición zonal. Cada zona tiene espermatocistos que contienen células germinales en una sola fase de desarrollo.
Rojas, Fernando Oscar
core   +1 more source

Reflexions sur la systematique des Galeoidei et sur les affinités du genre Cetorhinus à l'occasion de la découverte d'elements de la denture d'un exemplaire fossile dans les sables du Kattendijk à Kallo (Pliocene inferieur, Belgique) [PDF]

open access: yes, 1979
The discovery of some two hundred and one teeth and of a lot of poorly scattered gill rakers referable to a single specimen of Cetorhinus drive us to express a lot of reflexions concerning affinities of genus Cetorhinus and the systematic of the ...
Herman, J.
core  

Length-weight relationships of marine fishes from the central Brazilian coast [PDF]

open access: yes
Parameters of the length-weight relationship are presented for 85 fish species from the marine and estuarine regions of the central Brazilian coast (latitude 13° to 23° S). Three different methods were used. A non-linear iterative process using the quasi-
Braga, A.C., Costa, P.A.S., Frota, L.O.
core  

Adriatic chondrichthyes [PDF]

open access: yes, 2018
Hrskavičnjače (Chondrichtyes) su evolucijski stari razred koji se dijeli na dva podrazreda: prečnouste (Elasmobranchii) u koje spadaju morski psi (Selachii) i raže (Batoidea) te cjeloglavke (Holocephali).
Horvat Velić, Emina
core   +2 more sources

El estado actual de los tiburones y rayas sujectos a explotación comercial en el Golfo de California: una investigación aplicada al mejoramiento de su manejo pesquero y conservación [PDF]

open access: yes, 2009
Se realizaron prospecciones estacionales durante 1998–1999 en Baja California, Baja California Sur, Sonora y Sinaloa para determinar la dimensión y las actividades de las pesquerías artesanales de elasmobranquios dentro del Golfo de California.
Bizzarro, Joseph J.   +7 more
core  

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