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Now showing items 21-30 of 31
Descripción de la pesquería artesanal de peces, en tres puertos pesqueros de la IV región, Coquimbo, Chile
(Universidad Nacional (Costa Rica), 2002)
Se realizó un seguimiento de la pesca artesanal de peces en las caletas de Coquimbo, Guanaqueros y Tongoy en la IV región, Chile, entre junio de 1995 y junio de 1996. El estudio comprendió un análisis de las especies ...
Saxitoxin Poisoning in Green Turtles (Chelonia mydas) Linked to Scavenging on Mass Mortality of Caribbean Sharpnose Puffer Fish (Canthigaster rostrata-Tetraodontidae)
(Frontiers Media (Suiza), 2019-12-17)
Fish within the family Tetraodontidae are potential sources of both endogenous
tetrodotoxins (TTXs) and dietary derived saxitoxins (STXs). Ingestion of fish tissues
containing these toxins by other vertebrates can lead ...
Variación mensual del índice de gonadosomatico de Colossoma macropomum relacionado a factores ambientales en Cañas, Costa Rica
(Universidad Nacional (Costa Rica), 2000)
Con el fin de determinar la variación mensual en el índice gonadosomático de Colossoma macropomum en estanques, se tomaron muestras mensuales de 10 individuos desde setiembre de 1993 hasta setiembre de 1994. Se midieron ...
Citotaxonomía comparativa de tres especies de Cichlasoma (Pisces: Cichlidae) nativas de Costa Rica
(Universidad de Costa Rica, 1991)
The karyotype oí three species oí CichlasofM: C. dOllii, C. managwmse and C. friedrichstali were studied.
The number of diploid chromosomes is 2n=48 in the fust two species. Their karyotypes are composed of four pairs ...
Hormone-induced spawning of wild and captive-grown spotted rose snapper Lutjanus guttatus using carp pituitary suspension and human chorionic gonadotropin
(Universidad Autónoma de Baja California, México, 2011)
Hormone-induced spawning of the spotted rose snapper Lutjanus guttatus was studied using wild and cage-grown fish. Carp
pituitary suspension (CPS) and human chorionic gonadotropin (hCG) were assessed. Wild females (0.7–2.1 ...
Nitrogen budget and fluxes in Colossoma macropomum ponds
(Blackwell Publishing Ltd., 2005-07-01)
This study quanti¢ed the accumulation of nitrogen (N) in the water column, sediments, ¢sh and seepage water during a production cycle of Colossoma macropomum. By combining estimates of the deposition rates of uneaten feed, ...
Organic matter sedimentation and resuspension in tilapia (Oreochromis niloticus) ponds during a production cycle
(2002-07-01)
The rates of sedimentation and resuspension of organic carbon and total nitrogen were
measured in earthen fishponds, based on nutrient input, water quality parameters and fish size and biomass. Material collected in ...
Influencia del pez León (Pterois miles y Pterois volitans) en la cadena de valor de la pesca artesanal, Caribe sur de Costa Rica
(Universidad Estatal a Distancia (Costa Rica), 2019-08-23)
“Lionfish (Pterois miles and Pterois volitans) influence on
the artisanal fishing value chain, Southern Caribbean of Costa Rica”.
Introduction: The “Lionfish” are actually two invasive species that occur
in several parts ...
Growth and alkaline digestive proteases activity of Parachromis dovii larvae fed live prey and formulated diets with different protein sources
(Universidad Técnica de Manabí (Ecuador), 2022-07-16)
Parachromis dovii is a carnivorous cichlid fish from Central America, which easily accepts formulated feeds since exogenous feeding starts; however, its larval growth is lower than that obtained using live food. For this ...
Composición, diversidad y abundancia de peces en el embalse Arenal, Guanacaste, Costa Rica
(Universidad de Costa Rica (Costa Rica), 1989-11-01)
The abundance, species diversity. richneiS, dominance, evenness and similarity índices of the fish cornmunities at two stations in the Arenal Reservoir, Guanacaste, Costa Rica, were estimated between April 1984 and April ...