Buscar
Mostrando ítems 1-10 de 266
Gamete interactions in teleost fish: the egg envelope. Basic studies and perspectives as environmental biomonitor
(Sociedad de Biología de Chile, 2011)
Drifting in a free-flowing river: Distribution of fish eggs and larvae in a small tributary of a Neotropical reservoir
(Revista Biota Neotropica, 2021-01-01)
We investigated spatial and temporal variations in the distribution of fish eggs and larvae in the Guarei River, a free-flowing tributary located in the upper section of the Jurumirim Reservoir, Paranapanema River, Brazil. ...
Structural analysis of fertilization in the fish Brycon orbignyanus
(Cambridge University Press, 2009-05-01)
In the present work, we analyzed the structure of oocytes and fertilized eggs of the piracanjuba fish (Brycon orbignyanus) under light and scanning electron microscopy. After inducing spawning, samples were collected at ...
Dispersal of fish eggs and larvae in a cascade of small hydropower plants with fish ladders
(Springer, 2020-10-10)
This study was conducted to investigate fish eggs and larvae dispersal in a river stretch influenced by small hydropower plants in Southeast Brazil. The main hypothesis is that the downstream dispersal of free-flowing eggs ...
Egg surface structure of the freshwater toadfish Thalassophryne amazonica (Teleostei: Batrachoididae) with information on its distribution and natural habitat
(SOC BRASILEIRA ICTIOLOGIASAO PAULO, 2012)
The egg surface structure of Thalassophryne amazonica, a freshwater toadfish from the Amazon basin is described. Eggs of this species show a remarkable, highly unusual system of parallel ridges and intermittent grooves ...
Trophic eggs in the foam nests of Leptodactylus labyrinthicus (Anura, Leptodactylidae): An experimental approach
(2005-10-01)
The South American pepper frog, Leptodactylus labyrinthicus, is a large species that lays eggs in foam nests in holes dug out of the banks of different bodies of water. Recently, it was reported that only 6-10% of eggs are ...
Reproductive migration of fish and movement in a series of reservoirs in the Upper Parana River basin, Brazil
(Wiley-Blackwell, 2013-10-01)
AbstractThis study evaluates the effectiveness of two fish passes at two hydropower dams (Canoas I and II) in the Upper Parana basin, which form part of a cascade of three reservoirs. Fish from 12 migratory species (3089 ...
Effects of photoperiod on reproduction of Siamese fighting fish Betta splendens
(Sociedade Brasileira de Zootecnia, 2012-04-01)
This study investigated the effect of different photoperiods (24 h of light (L):0 h of darkness (D); 20L:4D; 16L:8D; 12L:12D; and 8L:16D) on the reproduction and growth of Betta splendens. The results showed that spawning ...
Effect of the incubation temperature on the embryonic development and hatching time of eggs of the red porgy Pagrus pagrus (Linne, 1758) (Pisces: Sparidae)
(Universidad de Valparaíso. Facultad de Ciencias del Mar, 2005)