|
|
|
| Registros recuperados: 34 | |
|
| |
|
|
| The stages of fishes that are discussed in this conference are those that are collected by hauling plankton nets in the oceans. These are the eggs, larvae and less frequently the juveniles of marine fishes. There are three principal reasons why ichthyoplankton surveys are made. Firstly, the surveys are often directed toward a single target species in order to use the distribution and abundance of the pelagic eggs to obtain an estimate of the biomass of the adult spawning population. Secondly, the larvae of a target species are studied in order to estimate the success of the year brood resulting from its spawn and hopefully to understand the factors underlying fluctuations in survival. The third reason is to use ichthyoplankton surveys to evaluate fish... |
| Tipo: Text |
Palavras-chave: Fishery biology; Ichthyoplankton surveys. |
| Ano: 1976 |
URL: http://archimer.ifremer.fr/doc/1976/publication-1996.pdf |
| |
|
| |
|
| |
|
| |
|
|
| Kane, A.. |
| L'aptitude et l'efficience à induire la maturation finale de Prochilodus magdalenae (Steindachner 1878) ont été testées avec deux inducteurs chez des femelles et mâles de bocachico sélectionnés avec des critères morphologiques externes . Leurs effets ont été testés avec deux types de doses (hypothèse de dose définitive haute avec 10 mgkg et 0,075 mg/kg respectivement pour CPE et LHRHa associée à du pimozide à 5 mgkg; hypothèse de dose définitive basse avec e g k g et 0,05 mgkg pour respectivement CPE et LHRHa) et deux schémas d'injections dont l'une avec une seule dose préliminaire (contenant le diième de la dose définitive et espacée de 15 à 16 heures de celle ci) et le second avec deux injections préliminaires (espacées de 24 h). Parallèlement, nous... |
| Tipo: Theses and Dissertations |
Palavras-chave: Fishery; Fishery biology; Fishery biology; Http://aims.fao.org/aos/agrovoc/c_2937. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/2613 |
| |
|
| |
|
|
| Jerez, G.; Olguín, A.. |
| El presente documento es una herramienta útil para todo usuario ligado al sector pesquero, pudiendo ser además consultado como material de apoyo por profesores que busquen conceptos breves y fáciles de entender. La serie entrega un conjunto de 11 fichas de diferentes recursos bentónicos, todos de importancia comercial. Cada una de las fichas abarca conceptos que van desde su nombre científico, pasando por aspectos de su biología, ecología, pesquería y mercado. Junto con lo anterior se proporciona una breve bibliografía de consulta en la cual el usuario puede obtener antecedentes de mayor especificidad según sean sus requerimientos. Al final se entrega un listado de páginas web de interes asociados a las especies contenidas en las fichas. |
| Tipo: Book |
Palavras-chave: Benthos; Fishery biology; Benthos; Fishery biology; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_2937. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/1402 |
| |
|
| |
|
|
| de Moussac, G.. |
| Commercial catches of the crabe girafe, Ranina ranina in the Seychelles are analyses. Male crabs are dominant in the catch (65_310= male to 35_310= female) Large individuals present in the catch (exceeding 115mm) are all males. The size at first maturity for female crabs is 89.5mm. One spawning season is observed annually, around December Von Bertalanffy growth estimates obtained from length frequency data using the Hasselblad method to separate the modes followed by modal progressions, are as follows: Males: L oo = 160mm, k = 0.24 per year: Females: L oo = 137mm, k = 0.12 per year. Alternative estimates are also given using the Von, Bertalanffy equation assuming seasonally oscillating growth. The total mortality which corresponds to the natural mortality... |
| Tipo: Report |
Palavras-chave: Fishery statistics; Catch statistics; Fishery biology. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/5115 |
| |
|
| |
|
|
| González, N.; Solís, E.. |
| En Ecuador se han reportado cuatro especies de pinchagua: Opisthonema bulleri, O. libertate , O. medirastre, O. berlangai, difíciles de distinguir a través de sus características morfológicas externas durante los desembarques, por lo que para estas investigaciones se las ha agrupado a nivel de género (Opisthonema spp.). Su captura se la destina para la elaboración de enlatados, prohibiéndose su utilización para la elaboración de harina de pescado. Se ha registrado una considerable declinación de este recurso a partir de 1985, hasta llegar a un mínimo desembarcado de 6 895 t durante el 2003; en el 2009 acumuló 22 528 t. El rango de longitudes fluctúa entre 9 y 33 cm LT. Por lo general, un gran porcentaje de los individuos capturados no alcanzan la talla... |
| Tipo: Journal Contribution |
Palavras-chave: Pelagic fish; Processed fishery products; Catch composition; Sexual maturity; Fishery biology. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4792 |
| |
|
|
| Pineda, S.E.; Brunetti, N.E.; Scarlato, N.A.. |
| A bibliographical review of the taxonomy and biology of the two most important loliginid species, Loligo sanpaulensis and Loligo gahi, of the Argentine Sea is presented. The external morphology and the anatomy of the reproductor system for both sexes are described, as well as the larval period, nutrition, age and growth for both species. The geographical distribution and the relative abundance in relation to the size structure and maturity stage are analized. Abundance estimations of L.gahi, in the Southpatagonian shelf, were obtained from two research cruises data. Catch data for the two species is also presented. |
| Tipo: Book Section |
Palavras-chave: Taxonomy; Animal morphology; Fishery biology; Taxonomy; Animal morphology; Fishery biology; Http://aims.fao.org/aos/agrovoc/c_7631; Http://aims.fao.org/aos/agrovoc/c_421; Http://aims.fao.org/aos/agrovoc/c_2937. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/2577 |
| |
|
| |
|
|
| Bautil, B.R.R.. |
| Spiny lobster fishing in the Seychelles is an artisanal done essentially by skin divers operating at night in the shallow waters surrounding by the islands. Because of human population distribution lobster fishing grounds are concentrated on the inner granitic islands. In September 1992, a random stratified samoling program was set up to gather biological information from the entire granitic Mahe plateau. Direct census of fishery resources by Scuba divers swimming underwater transects was selected as the most feasible and expedient means by which to enact the Resource Survey. This report present partial result gathered for the survey around Mahe Island only and provides an estimate of the Maximum sustainable yield for the granitic plateau by extrapolation... |
| Tipo: Report |
Palavras-chave: Fishery surveys; Fishery biology; Population characteristics; Panulirus. |
| Ano: 1992 |
URL: http://hdl.handle.net/1834/5118 |
| |
|
|
| Morsan, E.. |
| The purple clam, Amiantis purpurata, inhabits the warm-temperate waters of the southwestern Atlantic, from Espírito Santo (Brazil) to the San Matías Gulf (Argentina). There are no previous studies dealing with its biology and populations dynamics. Astock located in Playa Villarino (San Antonio Este, San Matías Gulf) supports the only artisanal fishery targeting this species. Some peculiar aspects of its dynamics revealed by this study have significant implications for management: 1. It constitutes the southernmost population of this species, and appears to be isolated from other populations located to the north 2. Individuals are slow-growing 3. It seems to be composed of just one or a few annual classes, which are older than 10 years . 4. The spatial... |
| Tipo: Theses and Dissertations |
Palavras-chave: Population dynamics; Artisanal fishing; Fishery biology; Clam fisheries; Fishery resources; Resource exploitation. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/5034 |
| |
|
|
| Abdulhadi, H.A.. |
| The present work was carried out on ten mature Tilapia (Tilapia spilurus) and ten mature Bream fish (Mylio cuvieri) and the specimens were processed for histological studies. The oesophagus of Bream fish is characterized by the presence of numerous mucous cells which react positively to P.A.S. and alcian blue. While oesophagus of Tilapia is completely filled with mucous cells that react positively to P.A.S. only. The stomach of Bream consists of one part while that of Tilapia consists of two parts (cardiac and pyloric). The mucosa of stomach of both types of fish reacted positively to P.A.S. the pyloric caeci of Bream fish showed numerous mucous cells that react positively to Alsain blue. The small intestine of bream has thicker tunica muscularis than that... |
| Tipo: Journal Contribution |
Palavras-chave: Fishery biology; Fishery biology; Http://aims.fao.org/aos/agrovoc/c_2937. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1085 |
| |
|
| |
|
|
| Kroeck, M.A.. |
| Los moluscos bivalvos son organismos sedentarios que establecen una relación íntima no sólo entre ellos, sino también con el espacio que ocupan y con sus condiciones fisicoquímicas. Sus poblaciones pueden ser hospedadoras de múltiples organismos patógenos (virus,bacterias, hongos, protistas y metazoos), cuya presencia es regulada eficazmente a niveles infra, meta y suprapoblacionales en ambientes silvestres, no provocando, salvo excepcionalmente, impactos severos. Los cultivos a escala comercial producen concentraciones de individuos, con la consiguiente alteración del medio y del equilibrio natural en la relación parásito-hospedador, generándose condiciones apropiadas para el desarrollo de enfermedades. Entre los años 1995 y 1996 se instala, en la zona... |
| Tipo: Theses and Dissertations |
Palavras-chave: Fishery biology; Marine molluscs; Parasitology; Protozoan diseases; Histopathology; Spatial distribution; Environmental conditions; Methodology; Examinations. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/5244 |
| |
| Registros recuperados: 34 | |
|
|
|
