Chondrichthyes
Mostrando 1-12 de 64 artigos, teses e dissertações.
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1. Reproductive biology of the Brazilian blind electric ray Benthobatis kreffti (Chondrichthyes: Narcinidae)
RESUMO Este estudo apresenta informações sobre a biologia reprodutiva da raia elétrica cega brasileira Benthobatis kreffti, endêmica do sul e sudeste brasileiros. Os indivíduos foram capturados com arrasto de fundo, em 2003 e 2007, a 492-501 m de profundidade no talude continental do Estado de São Paulo. Um total de 152 fêmeas (115-299 mm) e 144 macho
Neotrop. ichthyol.. Publicado em: 25/04/2019
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2. Checklist of marine demersal fishes captured by the pair trawl fisheries in Southern (RJ-SC) Brazil
Resumo: Nas costas tropicais e subtropicais, sobre as plataformas continentais, os recursos pesqueiros demersais são abundantes e considerados uma parcela importante do ambiente marinho. Os recursos pesqueiros demersais marinhos são capturados por diversas modalidades de pesca, muitas vezes de forma insustentável, o que vem provocando o esgotamento de seu
Biota Neotrop.. Publicado em: 21/01/2019
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3. Growth and reproduction in captivity unveils remarkable life-history plasticity in the smallnose fanskate, Sympterygia bonapartii (Chondrichthyes: Rajiformes)
ABSTRACT We analyzed growth and reproduction of captive-born smallnose fanskates Sympterygia bonapartii. Egg cases were obtained from oviposition of two females caught in the wild and held at Temaikèn Aquarium. Following hatching, growth was analyzed in 13 females and 21 males until sexual maturity. Pattern of oviposition activity and reproductive performan
Neotrop. ichthyol.. Publicado em: 06/12/2018
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4. Uma nova espécie de Acanthobothrium (Eucestoda: Onchobothriidae) em Aetobatus cf. narinari (Myliobatidae) de Campeche, México
Resumo O exame helmintológico do trato digestivo de nove espécimes de Aetobatus cf. narinari (arraia pintada) revelou a presença de uma nova espécie de cestódeo do gênero Acanthobothrium. As arraias foram coletadas de quatro locais no México: Laguna Términos, ao sul de Isla del Carmen e nas águas marinhas ao norte de Isla del Carmen e Champotón, no
Rev. Bras. Parasitol. Vet.. Publicado em: 12/03/2018
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5. Reproductive biology of the cockfish, Callorhinchus callorynchus (Chondrichthyes: Callorhinchidae), in coastal waters of the northern Argentinean Sea
ABSTRACT The cockfish, Callorhinchus callorynchus, is a widely distributed holocephalan in the south-western Atlantic and an important resource for Argentinean fisheries. The reproductive characteristics of this species were studied in northern Argentinean coastal waters, where specimens arrive seasonally (winter-spring). Sexual dimorphism in maximum precaud
Neotrop. ichthyol.. Publicado em: 22/05/2017
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6. Reproductive biology of Sympterygia bonapartii (Chondrichthyes: Rajiformes: Arhynchobatidae) in San Matías Gulf, Patagonia, Argentina
ABSTRACT This study estimates and analyses the reproductive parameters and cycle of Sympterygia bonapartii in San Matías Gulf, northern Patagonia, Argentina. A total of 827 males and 1,299 females were analysed. Males ranged from 185 to 687 mm of total length (TL) and females from 180 to 742 mm TL. Sexual dimorphism was detected; females were larger, heavie
Neotrop. ichthyol.. Publicado em: 03/04/2017
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7. Early Devonian (Late Emsian) shark fin remains (Chondrichthyes) from the Paraná Basin, southern Brazil
ABSTRACT We report on the pioneering discovery of Devonian fish remains in the Paraná Basin, which represents the southernmost record of fishes from that period in mainland South America. The material comes from an outcrop at the lower portion of the São Domingos Formation, within Sequence C of the Paraná-Apucarana sub-basin in Tibagi, State of Paraná. M
An. Acad. Bras. Ciênc.. Publicado em: 2017-03
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8. Teratogenic processes in an embryo without gills and low yolk absorption of Zapteryx brevirostris (Elasmobranchii: Rhinobatidae)
Resumo Este é o primeiro relato de anomalias morfológicas em embriões de Zapteryx brevirostris, espécie comum no Brasil. As brânquias estiveram ausentes, e as nadadeiras peitorais mostraram-se assimétricas e não totalmente formadas e fundidas à cabeça. A nadadeira esquerda, a maior, se projetou destacadamente em direção à cabeça, quase alcançan
Braz. j. oceanogr.. Publicado em: 2015-12
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9. Determination of limited histotrophy as the reproductive mode in Mustelus schmitti Springer, 1939 (Chondrichthyes: Triakidae): analysis of intrauterine growth of embryos
ABSTRACT 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 2006 and 2007. Differences in total length and total mass between sexes were not significant.
Neotrop. ichthyol.. Publicado em: 2015-12
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10. Morphology and dynamics of male gametogenesis in Sympterygia bonapartii (Chondrichthyes, Rajidae) from Northern Patagonia
ABSTRACT The smallnose fanskate, Sympterygia bonapartii Müller & Henle, 1841 is one of the most disembarked items in commercial harbors in Argentina. In this work, the microscopic architecture of mature male gonads and the dynamics of cysts development are analyzed as a contribution to awareness of the reproductive biology of the species. Some biological da
Iheringia, Sér. Zool.. Publicado em: 2015-09
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11. Histochemical study of the oviducal gland and analysis of the sperm storage tubules of Mustelus schmitti Springer, 1939 (Chondrichthyes, Triakidae)
Abstract: The paired oviducal glands of immature and mature females of Mustelus schmitti were examined macro and microscopically. Findings indicate that these glands possessed the same zonation as in most chondrichthyans from anterior to posterior: club, papillary, baffle and terminal zones. The whole gland is composed by simple tubular glands that connect w
Pesq. Vet. Bras.. Publicado em: 2015-08
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12. Inventário das espécies de Chondrichthyes e Actinopterygii coletadas no litoral central do estado de São Paulo, Brasil
Este inventário comentado da biodiversidade do litoral central do estado de São Paulo apresenta as espécies de peixes demersais e pelágicas da baía de Santos, do canal de Bertioga e da plataforma continental adjacente, entre Peruíbe e São Sebastião, da costa até 100 m de profundidade. Os exemplares foram capturados durante campanhas oceanográficas,
Biota Neotrop.. Publicado em: 23/06/2015