Results 11 to 20 of about 134 (73)

Urophysial and pituitary extracts for spawning induction in teleosts Extratos urofisário e hipofisário para indução da desova em teleósteos

open access: yesCiência Rural, 2000
Several studies have suggested that the caudal neurosecretory system could act on fish reproduction. The aim of this study was to compare the effect of urophysial extract (UE) and carp pituitary homogenate (CPH) on the induction of spawning in Hoplias ...
Everton Rodolfo Behr   +4 more
doaj   +2 more sources

Influência do fotoperí­­odo natural na reprodução induzida do tambaqui, Colossoma macropomum (Cuvier, 1818)

open access: yesBoletim do Instituto de Pesca, 2018
Caracterí­­sticas importantes como sabor, rusticidade e rápido crescimento, dentre outras qualidades, fazem do tambaqui, Colossoma macropomum, um dos peixes mais importantes da piscicultura brasileira.
José Antônio Salgado de Moura Muniz   +2 more
doaj   +2 more sources

The influence of water renewal rates on the reproductive and molting cycles of Penaeus paulensis in captivity [PDF]

open access: yesBrazilian Archives of Biology and Technology, 2003
The present study analyzed the reproduction of wild-caught Penaeus paulensis in relation to its molt cycle. The experimental design consisted of two treatments (continuous water flow and batch renewal) with two replicates.
Sílvio Peixoto   +2 more
doaj   +4 more sources

Gonadal steroids levels and vitellogenesis in the formation of oocytes in Prochilodus lineatus (Valenciennes) (Teleostei: Characiformes)

open access: yesNeotropical Ichthyology, 2012
The objective of this study was to obtain information about the possible mechanisms related to poor reproductive performance in tropical rheophilic fish.
Patrick Hainfellner   +4 more
doaj   +1 more source

Seleção de fêmeas de pacu para indução hormonal: efeito da idade e dos métodos de avaliação

open access: yesBoletim do Instituto de Pesca, 2016
Neste estudo, investigamos o ciclo reprodutivo e a época de desova de fêmeas "velhas” (FVs) e fêmeas "jovens” (FJs) de P. mesopotamicus, visando melhorar o processo de seleção de peixes para a indução hormonal.
Marianne SCHORER   +2 more
doaj   +1 more source

Recent advances in fish hatchery management Avanços recentes em larvicultura

open access: yesRevista Brasileira de Zootecnia, 2010
The advancement of aquaculture has often been bottlenecked because of the lack of seed, but once that bottleneck was overcome there was rapid growth. Recent examples of advances in hatchery technology leading to increased production are sea bream and ...
Ronald P. Phelps
doaj   +1 more source

Biotechnology applied to salmoniculture Biotecnologia aplicada à salmonicultura

open access: yesRevista Brasileira de Zootecnia, 2009
This work presents a conceptual analysis of the main biotechnologies used in Chilean salmoniculture, which is based on the production of Atlantic salmon (Salmo salar, 356.407 t),silver salmon or coho (Oncorhynchus kisutch, 116.481 t), (O.
Iván Valdebenito Isler
doaj   +1 more source

Effect of Light Intensity on Initial Survival of Fat Snook (Centropomus parallelus, Pisces: Centropomidae) Larvae

open access: yesBrazilian Archives of Biology and Technology, 2001
Different light intensities were tested during the larval rearing of fat snook (Centropomus parallelus) to evaluate its influence on survival and functional swim bladder rate.
Vinicius Ronzani Cerqueira   +1 more
doaj   +1 more source

Determinação da razão ótima de espermatozóides por ovócitos de piabanha Brycon insignis (pisces - characidae) Determination of the optimum ratio of spermatozoa per oocyte of the piabanha Brycon insignis

open access: yesArquivo Brasileiro de Medicina Veterinária e Zootecnia, 2007
Determinou-se a razão ótima de espermatozóides por ovócitos da piabanha Brycon insignis, utilizando-se dois machos e duas fêmeas da espécie, submetidos ao procedimento de desova induzida.
E. Shimoda   +4 more
doaj   +1 more source

Uso continuado de plantel de tambaqui (Colossoma macropomum) durante o ciclo reprodutivo anual. [PDF]

open access: yes, 2021
O tambaqui (Colossoma macropomum) caracídeo da bacia Amazônica, atualmente é a espécie nativa mais produzida na piscicultura no Brasil e em alguns países vizinhos.
OLIVEIRA, R. G. de S. de   +2 more
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