Gonadal Maturation
Mostrando 13-24 de 49 artigos, teses e dissertações.
-
13. Biologia reprodutiva da baúna de fogo Lutjanus alexandrei (Moura &Lindeman, 2007) capturada na costa Norte do Estado de Pernambuco
The study presents information about the reproductive characteristics of baúna de fogo Lutjanus alexandrei. Ware obtained 540 samples of this species in north coast of Pernambuco state from 2004 to 2006. Ware realized 250 (150 females and 100 males) histological cuts and observations of the presents oocytes and spermatogonias, analyzed with microscopy to de
Publicado em: 2010
-
14. Dinâmica do desenvolvimento das gônadas de Parastacus varicosus (Crustacea, Decapoda, Parastacidae) / Dynamics of gonadal development of Parastacus varicosus (Crustacea, Decapoda, Parastacidae)
O desenvolvimento das gônadas de uma espécie pode ser avaliado pela determinação do índice gonadossomático e hepatossomático. O hepatopâncreas é o maior centro de reservas em decápodos e essas reservas podem ser transferidas para as gônadas durante o seu desenvolvimento. O objetivo desta pesquisa foi avaliar, no lagostim Parastacus varicosus Faxon
Publicado em: 2010
-
15. Determinação da concentração espermática para melhor taxa de fertilização do híbrido tambacu (Colossoma macropomum X Piaractus mesopotamicus)
The techniques of artificial reproduction by inducing reproductive fish that inhabit running waters(reofílicos) is part of everyday life in the fish farms in Goiás.These techniques must be refine in order to provide a better fertilization rate of sperm/oocyte.The hybrid tambacu is one of the most grown fish in Brazil, from the cross of tambaquis female(Col
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/03/2009
-
16. Reproductive biology of Oligosarcus argenteus (Gunther, 1864) adult males and description of the gonadal maturation stages
Oligosarcus argenteus é uma espécie pertencente à subfamília Acestrorhynchinae, restrita à América do Sul, sendo comumente encontrada nas várias bacias hidrográficas brasileiras, em ambientes lóticos e lênticos, onde se reproduzem. Com o objetivo de estudar a biologia reprodutiva de machos desta espécie, vários parâmetros morfológicos foram ana
Brazilian Archives of Biology and Technology. Publicado em: 2009-02
-
17. Biologia reprodutiva da tainha Mugil liza Valenciennes e do Parati Mugil curema Valencienns (Actinopterygii, Mugilidae) na Baia de Sepetiba, RJ, Brasil
The reproductive biology of the mullets Mugil curema and Mugil liza was determined mainly by observing gonad development, size at maturation and fecundity. The objective of this study was to learn about the strategies developed by these species to maintain their exploited populations in an increasingly altered system. It was hypothesized that there are diffe
Publicado em: 2009
-
18. Dinâmica reprodutiva e parasitária de quatro espécies de peixes das águas costeiras do Sudoeste do Oceano Atlântico, Brasil
The present study investigated the reproductive dynamics and parasitism of four species of marine fishes: serra Spanish mackerel, Scomberomorus brasiliensis, Atlantic leatherjacks, Oligoplites saurus and O. palometa,, and Atlantic bumper, C. chrysurus, during the period of August, 2005 to July, 2007, in the coastal waters of Southwest Atlantic Ocean, Brazil.
Publicado em: 2008
-
19. Maturidade sexual e relações morfométricas do caranguejo Goniopsis cruentata (Latreille, 1803) Crustacea: Brachyura: Grapsidae) do estuário do Rio Jaguaribe (Aracati - Ceará) / Sexual maturity and relationships morphometric crab Goniopsis cruentata (Latreille, 1803) Crustacea: Brachyura: Grapsidae) from the estuary of the River Jaguaribe (Aracati - Ceará)
The species Goniopsis cruentata has an important commercial value in Northeast Brazil. The objective of the present study was to determine the size in which this species reaches sexual maturity and, through the analysis of relative growth, to establish relationships between the structures related to secondary sexual characteristics and the stages of reproduc
Publicado em: 2008
-
20. Rare data on a rocky shore fish reproductive biology: sex ratio, length of first maturation and spawning period of Abudefduf saxatilis (Linnaeus, 1758) with notes on Stegastes variabilis spawning period (Perciformes: Pomacentridae) in São Paulo, Brazil
Esse estudo apresenta dados sobre a reprodução de Abudefduf saxatilis, uma espécie habitante de costões rochosos no litoral norte do estado de São Paulo. Os peixes foram coletados com anzol e isca num total de 73 indivíduos, foram medidos, pesados, dissecados, seu sexo e maturidade gonadal foram analisados, primeiro macroscopicamente, depois parte dess
Brazilian Journal of Oceanography. Publicado em: 2007-09
-
21. Morpho-functional characteristics of sex reversal in Synbranchidae (Teleostei: Synbranchiformes) / Perfil morfo-funcional da inversão de sexo em Synbranchidae (Teleostei: Synbranchiformes)
Teleost fishes exhibit several sexual patterns during their ontogeny, in which the gonads change into functional ovaries or testes. In distinct Orders, both gonochoristic and hermaphrodite species, simultaneous as well as sequential or consecutive, can be found. In sequential hermaphroditism (protandrous or protogynous), sex change in adult individuais invol
Publicado em: 2006
-
22. Caracterização e zoneamento ambiental da reserva particular do patrimônio natural Parque Ecológico João Medeiros (Fazenda Verde, Rondonópolis, MT).
This study was undertaken at the Lapa microbasin (Itirapina/ Ipeúna), located in the central Cuestas region of the State of São Paulo, Brazil, with the objective to characterize ichthyofauna composition and longitudinal distribution within the basin and to examine the diversity, richness and equability for each of the 12 sample stations. Sampling took plac
Publicado em: 2005
-
23. Descrição do ciclo reprodutivo de Donax hanleyanus (Bivalvia, Donacidae) no sul do Brasil
The changes in gonadal development in male and female of Donax hanleyanus Philippi, 1847 are described. Gonad development and spawning seasons were assessed by monthly sampling of population from Arroio Teixeira beach, southern Brazil. Histological examination of clams showed in the most of the adult population sampled that the spawning is practically contin
Iheringia. Série Zoologia. Publicado em: 2004-09
-
24. Dinâmica reprodutiva de Oligosarcus jenynsii e O. robustus (Characiformes, Characidae) na lagoa Fortaleza, Rio Grande do Sul, Brasil
Oligosarcus jenynsii (Günther, 1864) and O. robustus Menezes, 1969 are fish species distributed in Rio Grande do Sul, Brazil, Uruguay, and northern Argentina. The reproductive period and recruitment, sex ratio, absolute and relative fecundity, and body length at first gonadal maturation of the two carnivorous species from Fortaleza Lagoon were analized. The
Iheringia. Série Zoologia. Publicado em: 2004-03