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Mostrando ítems 31-40 de 43
Characterization of Gonadotropin-Releasing Hormone (GnRH) Genes From Cartilaginous Fish: Evolutionary Perspectives
(Frontiers Media S.A., 2018-09)
The neuropeptide gonadotropin-releasing hormone (GnRH) plays an important role in the control of reproductive functions. Vertebrates possess multiple GnRH forms that are classified into three main groups, namely GnRH1, ...
Persistent organic pollutants and chlorpyrifos in the cockfish Callorhinchus callorynchus (Holocephali: Callorhynchidae) from Argentine coastal waters: Influence of sex and maturity
(Elsevier Science, 2021-11)
Organic contaminants are of great environmental concern due to their negative impacts on coastal ecosystems, especially on highly vulnerable species as chondrichthyans. Accumulation of organochlorine pesticides (OCPs), ...
Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica
(Society of Vertebrate Paleontology, 2016-07)
The Eocene La Meseta Formation on Seymour Island, Antarctic Peninsula, is known for its remarkable wealth of fossil remains of chondrichthyans and teleosts. Chondrichthyans seemingly were dominant elements in the Antarctic ...
Diversidad y afinidades biogeográficas de los tiburones, rayas y quimeras (Chondrichthyes: Elasmobranchii, Holocephali) de México
(Universidad de Costa Rica, 2016)
Feeding habits of the cockfish, callorhinchus callorynchus (Holocephali: Callorhinchidae) from off northern argentina
(Sociedade Brasileira de Ictiologia, 2020-04)
Los hábitos alimentarios de Callorhinchus callorynchus fueron investigados en las aguas costeras del norte de Argentina. Se evaluó el efecto del tamaño del cuerpo, la temporada y la región sobre la composición de la dieta ...
Amino terminal sequence of heavy and light chains from ratfish immunoglobulin
(1989)
The ratfish,Callorhinchus callorhinchus, a representative of the Holocephali, has a natural serum hemagglutinin (Mr 960 000), composed of heavy (Mr 71000), light (Mr 22 500), and J (Mr 16 000) chains. To approach the ...
Observations of follicle cell processes in a holocephalan
(Wiley Blackwell Publishing, Inc, 2018-06-27)
The presence of follicular cellular processes (FCP) that cross the zona pellucida, has been recorded in the ovarian follicles of Callorhinchus callorhynchus. This constitutes the first report describing the presence of ...
Towards regionalization of the chondrichthyan fauna of the Southwest Atlantic: a spatial framework for conservation planning
(Oxford University Press, 2020-09)
Biogeographic regionalization identifies natural species assemblages of a given region. In this study, the geographic distribution of chondrichthyan species richness and species assemblages for the Southwest Atlantic were ...