Results 31 to 40 of about 370 (97)

The DNA Barcoding of Several Commercial Fish from Simeulue Islands Coast of Aceh Using Cytochrome Oxidase Sub Unit I (COI) Gene Marker

open access: yesBudapest International Research in Exact Sciences (BirEx) Journal, 2019
Simeulue is a cluster of islands that rich of commercial fisheries in Aceh waters. Management of the fisheries products is highly related to species identification in order to ascertain the appropriate steps to manage the resources sustainably ...
Edwarsyah Edwarsyah   +2 more
semanticscholar   +1 more source

Relação entre peso do fígado, tamanho corporal e atividade reprodutiva em Atlantoraja cyclophora (Elasmobranchii: Rajidae: Arhynchobatinae) em águas oceânicas do Rio Grande do Sul, Brasil [PDF]

open access: yes, 2021
Samples of Atlantoraja cyclophora were obtained by bottom-trawling surveys on the outer continental shelf and upper slope of the Rio Grande do Sul State, Brazil, at depths between 100 and 300 m.
Oddone, Maria Cristina, Velasco, Gonzalo
core   +1 more source

Polymorphism in Conservative Structures? The Scapulocoracoids in Skates Genus Psammobatis (Chondrichthyes, Arhynchobatidae) and the Validity of P. parvacauda [PDF]

open access: yes, 2020
Skeletal structures, especially the claspers, neurocrania, and scapulocoracoids have been widely used to characterize and describe new species of elasmobranchs.
Díaz de Astarloa, Juan Martín   +4 more
core   +1 more source

Reproduction in cartilaginous fish. A review of some reproductive adaptations [PDF]

open access: yes, 2016
En este trabajo se presenta una revisión sucinta de la morfología de algunas especializaciones reproductivas de Condrictios, que han contribuido a la supervivencia del grupo desde sus orígenes.
Galíndez, Elena Juana
core   +2 more sources

Los parásitos como marcadores biológicos para la discriminación de poblaciones de rayas (chondrichthyes: rajiformes) del Mar Argentino [PDF]

open access: yes, 2022
Esta Tesis tiene como objetivo principal: caracterizar las comunidades parasitarias de batoideos en el Atlántico Sudoccidental, determinando patrones geográficos a nivel regional, e identificar los procesos que los originan; con énfasis en su potencial ...
Irigoitia, Manuel
core  

Revisão taxonômica da família Rajidae no Brasil (Chondrichthyes, Elasmobranchii, Rajiformes) [PDF]

open access: yes, 2002
A taxonomic review of the rajid fishes occurring in Brazilian waters were held. The taxonomic arrangement as well as recent captures of deep water specimens included in this study, increased in 37% the number of Brazilian Rajidae. New taxons and also new
Gomes, Ulisses Leite
core   +1 more source

Reproductive Biology of the Tiger Shark in the Western Atlantic Ocean [PDF]

open access: yes, 2018
Although tiger sharks are an important apex predator in many ecosystems, little is known about their reproduction. The goal of this study was to determine the size-at-maturity and the reproductive seasonality of tiger sharks in the western Atlantic Ocean.
Shields, Chelsea
core   +1 more source

Oviposition rate of the fanskate Sympterygia bonapartii (Elasmobranchii, Rajidae) (Müller & Henle, 1841) held in captivity

open access: yes, 2009
The oviposition rate in captive Sympterygia bonapartii was reported. In a year period one female laid a total of 152 egg cases at a rate of 0.4 egg cases per day and a second one laid a total of 200 egg cases at a rate of 0.5 egg cases per day.
Jañez, Julieta A., Sueiro, Maria Cruz
openaire   +1 more source

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