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| Registros recuperados: 11 | |
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| Souza,Liliane de L. G.; Chellappa,Sathyabama; Gurgel,Hélio de C. B.. |
| A biologia reprodutiva do peixe-donzela, Stegastes fuscus Cuvier, 1830 (Perciforemes, Pomacentridae), foi estudada nos arrecifes rochosos da praia de Búzios, Nísia Floresta, Rio Grande do Norte, Brasil. Os peixes foram coletados mensalmente, medidos, pesados, dissecados, as gônadas foram removidas, pesadas e examinadas para identificação do sexo. Avaliação macroscópica dos estádios de maturação gonadal foi realizada. Um total de 549 exemplares foi capturado durante o período de outubro de 2004 a setembro de 2005. Foi registrada uma maior freqüência de fêmeas (78%), em relação aos machos (22%). Foi observado que 50% da população das fêmeas e dos machos iniciaram o processo de maturação gonadal com comprimento de 6,2 cm e 7,0 cm, respectivamente. Em relação... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Desenvolvimento gonadal; Pomacentridae; Relação gonadossomática. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000200020 |
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| Cacho,Maria do Socorro R.F; Yamamoto,Maria Emília; Chellappa,Sathyabama. |
| Acará bandeira, Pterophyllum scalare Cuvier & Valenciennes, 1831 is a Neotropical cichlid fish, which has not been studied under a scientific approach. The objective of this work was to identify and describe the reproductive behaviour involved in the various phases of its reproductive cycle, such as territorial disputes and its establishment, substrate selection for spawning, courtship and mating, selection of mate and parental care. Twenty males and ten females of the study species were observed in the laboratory, over a period of six consecutive months. Behaviour descriptions resulting from these observations were analysed and the results show that the reproductive males are very agressive in the initial phase of reproduction. Agressiveness is a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Osteichthyes; Cichlidae; Pterophyllum scalare. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300006 |
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| Thatcher,Vernon E.; Araújo,Gustavo S. de; Lima,José T. A. X. de; Chellappa,Sathyabama. |
| Cymothoa spinipalpa sp. nov. (Isopoda, Cymothoidae) a buccal cavity parasite of the marine fish, Oligoplites saurus, is described on the basis of eight male specimens and one female. The fish hosts were captured in the coastal waters of Natal, Rio Grande do Norte State, Brazil. In the new species, the anterior margin of the cephalon is doubled ventrally over the bases of the antennae. In this respect, it resembles C. recifea Thatcher & Fonseca, 2005. It differs from that species, however, in being much smaller and having basal carinae on the pereopods 4 to 7 that are small and rounded (not large and pointed). Also, pleopods 2-4 lack the folds and pockets that are present in C. recifea. The new species can be distinguished from all known Cymothoa... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Ocean; Isopod parasite; Marine fish parasite. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000100032 |
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| Araújo,Andréa Soares de; Chellappa,Sathyabama. |
| This study was carried out to investigate the reproductive aspects of the flying fish, Hirundichthys affinis Günther, 1866 considering their importance in the fish production of the Rio Grande do Norte State, Brazil. Fish samples were collected from the Municipality of Caiçara do Norte, northern coast of the state, during the period of April, 1999 to April, 2000. The fish were measured, weighed, dissected and the gonads were examined to separate the sex and to determine the stage of maturation. Histological studies were done for microscopic characterization of the gonads. The results indicated that H. affinis had a sexual proportion of 1:1; condition factor was inversely related to the gonadosomatic index during the reproductive phase; and the highest for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flying fish; Reproductive strategy; Gonadal development. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000300006 |
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| Sá-Oliveira,Júlio César; Chellappa,Sathyabama. |
| During June 1999 to June 2000 one hundred and forty seven females of Hoplosternum littorale Hancock, 1828 were collected from the Curiaú River, Macapá, Amapá, Brazil. The objective of this study was to determine the fecundity and the type of spawning of H. littorale. Analysis of the percentage distribution of the oocyte diameter softh e females, in five different stages of gonadal development, showed that this species is a total spawner. There were two different size graups of oocytes with synchranic development. The total fecundity varied from 9, 144 to 31, 698 mature oocytes.The fecundity, when related to total length and weight, showed that it increases with the enhance in total length and weight. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Osteichthyes; Siluriformes; Hoplosternum littorale; Fecundity; Typeof spawning. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000400009 |
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| Magalhães,Fagner Augusto de; Garri,Rosana Griselda; Tosi,Carolina Herédia; Siciliano,Salvatore; Chellappa,Sathyabama; Silva,Flavio José de Llima. |
| In Brazil only one confirmed stranding is known from an emaciated specimen collected along the southeastern coast. The aim of this work is to report a recent record of a pygmy killer whale from the coast of Maranhão State, northern Brazil. On 22 October 2005, through regular surveys conducted by Projeto Cetáceos do Maranhão team, a beach-worn skull of a pygmy killer whale was found on the Mangue Seco beach, at Caju Island, Maranhão State. The specimen was identified through peculiar features, such as a short beak, 11 teeth per row in the maxile and the distance between the anterorbital notch and the end of the toothrow. This stranding suggests that pygmy killer whales may use oceanic waters close to Maranhão continental shelf. This is the second confirmed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stranding; Pygmy killer whale; Maranhão State; Brazil. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000200036 |
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| Lima,José T. A. X. de; Chellappa,Sathyabama; Thatcher,Vernon E.. |
| Entre Isopodas Crustaceas existem ectoparasitos que são de fácil observação devido ao seu tamanho. Eles causam lesões mecânicas no hospedeiro que podem resultar em morte. Este trabalho verificou a existência de parasitismo por isópodos no peixe serra, Scomberomorus brasiliensis (Collette, Russo & Zavala-Camin, 1978) das águas costeiras do Rio Grande do Norte, Brasil. Os índices de infestação parasitária dos isópodos foram calculados e relacionados com o tamanho, peso e o estado gonadal do hospedeiro. Livoneca redmanni (Leach, 1818) (Cymothoidae) e Rocinela signata (Schioedte & Meinert, 1879) (Aegidae) foram registradas pela primeira vez nas águas costeiras do Rio Grande do Norte. Os locais de fixação de L. redmanni no hospedeiro foram a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Câmara branquial; Cavidade bucal; Isopodas marinhos; Parasitos; Infestação parasitária. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400041 |
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| Registros recuperados: 11 | |
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