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| Registros recuperados: 27 | |
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| Mancera-P., J.E.. |
| Un estudio ecológico de la salina marina Pozos Colorados se llevó a cabo entre enero y agosto de 1987. Si bien las dos estaciones de muestreo presentaron amplias diferencias entre si; en general la dinámica del ecosistema dependió aparentemente de la salinidad, la cual varió entre 75 y 341 °/oo; su incremento y la disminución del nivel de agua, al parecer generaron aumento de la temperatura y disminución del oxígeno disuelto, con rangos de 26,3 y 41 °C para la primera y O y 5,4 mg/l para el segundo. Aunque en promedio el pH fue neutro (7,5), este sistema reductor, caracterizado además por abundante materia orgánica, generó en ocasiones una ligera acidez (6,7). La producción primaria neta fue negativa en la mayoría de los casos, como resultado de una... |
| Tipo: Journal Contribution |
Palavras-chave: Salinity effects; Ecosystems; Temperature effects; Primary production; Population structure; Ecology; Ecosystems; Primary production; Population structure; Ecology; Http://aims.fao.org/aos/agrovoc/c_2482; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_2467. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/3887 |
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| Chavance, P.. |
| En 1987, 59 chalutiers pélagiques (62-102 m, 2000 – 3880 cv) ont opéré dans la ZEE mauritanienne. Trois pays sont représentés : l’URSS, la Roumanie et l’Allemagne de l’Est. Les captures totales atteignent 441473 tonnes dont 66,5% est pêchée par les soviétiques, 26,3% par les roumains et 7,2% par les allemands de l’Est. Les chinchards (<Trachirus sp et Decapterus rhonchus>) prédominent dans les captures avec 50,8%, les sardinelles en représentent 14,9% et la sardine 7,7%. L’activité des flottilles est apparue, comme en 1986, très marquée par les saisons hydrologiques. |
| Tipo: Journal Contribution |
Palavras-chave: Chalutiers pélagiques; Flottilles industrielles; Captures; Saisons hydrologiques; Commercial fishing; Environmental impact; Fishing effort; Fishing fleet; Pelagic fisheries; Seasonal distribution; Seasonal variations; Temperature effects; Temporal variations; Trawling; Upwelling; Environmental impact; Trawling; Fishing effort; Pelagic fisheries. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/1147 |
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| Murphy, S; Oliver, J. |
| Of the several bacterial diseases which may result from consumption of shellfish, those caused by marine bacteria of the genus Vibrio are the most abundant. In the United States, up to 10,000 non-fatal cases per year are estimated to be caused by the various members of this genus. More than 95% of all deaths in the United States which result from seafood consumption are caused by a single bacterium, Vibrio vulnificus. The bacterium is a normal inhabitant of estuarine waters, and occurs naturally in especially high numbers in molluscan shellfish. Infections following consuption of raw or undercooked shellfish, especially oysters, result in fatality rates of over 60%. Because most oysters in the United States are transported large distances before marketing,... |
| Tipo: Text |
Palavras-chave: USA Coasts; Vibrio cholerae; Vibrio vulnificus; Crassostrea virginica; Bivalvia; Bacteria; Temperature effects; Food technology; Fish poisoning; Oyster culture. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1622.pdf |
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| Suarez Alvarez, G.. |
| La distribución del camarón blanco Penaeus schmitti puede interpretarse basándonos en el análisis de factores ecológicos y parámetros fisiológicos que pueden limitar su vida. Se estudiaron los datos de la distribución del oxígeno, salinidad, temperatura y los factores rhopicos Cl/SO4; Na/Ca y Cl/Ca) en muestras de agua del fondo de la bahía de Cienfuegos, los cuales se comparan con las áreas camaroneras de mayor rendimiento. Estas relaciones iónicas también se estudiaron en la hemolinfa de los camarones y se realizaron bioensayos de supervivencia a diferentes concentraciones iónicas del medio, determinándose las concentraciones óptimas para su presencia y después de compararlos con los valores del medio se recomiendan las mejores áreas para la captura del... |
| Tipo: Journal Contribution |
Palavras-chave: Shrimp fisheries; Temperature effects; Salinity effects; Zonal distribution; Capture fisheries; Survival; Bays. |
| Ano: 1973 |
URL: http://hdl.handle.net/1834/4879 |
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| Rimblot, F; Fretey, J; Lescure, J; Pieau, C. |
| Sexual differentiation of the marine leatherback turtle is sensitive to temperature. Incubation of eggs below 29 degree C results in 100% males, whereas incubationa bove 30 degree C results in 100% potential females at hatching. Therefore, the threshold temperature lies between 29 and 30 degree C as has been found for other marine turtles (Caretta caretta, Chelonia mydas ). Among hatchlings from natural nests in French Guiana, 10% were males, 20% were potential females and 70% had an intermediate phenotype. The sand temperature at 60 cm of depth, near one nest, was recorded and was found to vary between 29 and 30 degree C during the presumed thermosensitive period. These results will be useful to marine turtle hatcheries which seek to manipulate sex ratios... |
| Tipo: Text |
Palavras-chave: Dermochelys coriacea; Chelonia mydas; Reptilia; Hatcheries; Natural populations; Incubation; Turtle culture; Eggs; Temperature effects; Sexual dimorphism. |
| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/1983/acte-1241.pdf |
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| Vanhaecke, P.; Siddall, S.E.; Sorgeloos, P.. |
| The brine shrimp inhabits geographically isolated biotopes with specific biotic and abiotic conditions. This has resulted in various geographical strains between which marked genetica, biological and chemical differentiation exists. The response of 13 different <i>Artemia</i> strains to the combined effect of temperature and salinity has been studied. Experimental temperatures tested ranged from 18 to 34°C and salinities from 5 to 120 promille. Except for Chaplin Lake (Canada) <i>Artemia</i> , all strains showed high survival over a wide range of salinities (35-110 promille). For all strains the common temperature optimum was between 20 and 25°C. Interaction between temperature and salinity was negligible or very limited.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salinity effects; Survival; Temperature effects; Artemia. |
| Ano: 1984 |
URL: http://www.vliz.be/imisdocs/publications/261924.pdf |
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| Márquez, J.C.; Zea, S.; López-Victoria, M.. |
| Temperaturas del agua de mar por encima del promedio durante 2005 en el Archipiélago de las Islas del Rosario (Caribe Colombiano) causaron un blanqueamiento coralino masivo en aguas someras (hasta 2-3 m de profundidad). Para confirmar resultados previos en los que el estrés inducido por calentamiento del agua en los corales puede acelerar la velocidad a la que esponjas excavadoras incrustantes le ganan espacio a los corales vivos, se contrastaron las tasas de propagación lateral en individuos de la esponja Cliona tenuis previamente marcados, que estaban colonizando los corales Diploria strigosa y Siderastrea siderea a profundidades de 5 - 6 m. Se hicieron comparaciones pareadas del avance de cada individuo de esponja entre dos intervalos de medida... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Coral; Competitors; Associated species; Temperature effects; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1987 |
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| Gaudy, R; Pagano, M. |
| The zooplankton of an eutrophic brackish lagoon (Etang de Berre), near Marseille (France) was studied during an annual cycle. It was characterized by large populations of a pelagic copepod (Acartia tonsa ). Grazing on natural particles by this species was investigated. Adults were able to use an extended range of particle sizes, but showed selectivity for particles concentration was observed (14 mu m). Temperature and particles concentration appear to modify the selectivity behavior. Juvenile stages could also catch particles of various size but did not show the same selectivity for the peak particles as adults. Daily food ration was high comparatively to open-sea copepods. Taking into account several results obtained on food ration, egg production and... |
| Tipo: Text |
Palavras-chave: Copepoda; Lagoons; Energy budget; Seasonal variations; Particle concentration; Zooplankton; Food availability; Temperature effects; Nutrition. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-1526.pdf |
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| Registros recuperados: 27 | |
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