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Registros recuperados: 6
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Distribution des tailles de homard (Homarus gammarus L.) le long des côtes bas-normandes ArchiMer
Bertrand, Jacques.
Observations on lobsters catch with pots along the coasts of Basse-Normadie prove that large variations in the distribution of weight appear on adjoining zones. Influence of factors as environement, particularly substrat and tide, as also fishing effort are analysed. Effects of the evolutions in the year of animals catchability are also expected.
Tipo: Text Palavras-chave: Crustacés; Crustacea; Homard; Homarus gammarus; Normandie; Pêche; Distribution; Basse Normandie.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/00009/11984/8688.pdf
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Donnees cytologiques, electrophysiologiques et biochimiques relatives au phenomene de fecondation chez le homard (Homarus gammarus ). Implication du processus d'activation sur le mecanisme d'attache des oeufs pondus ArchiMer
Goudeau, M; Lachaise, F; Kubisz, P; Goudeau, H.
Electrophysiological measurements and related cytological controls were done on immature and submature oocytes of Homarus gammarus . By chromatography (HPLC) and radio-immunoassays (RIA) it was established that submature oocytes displayed different ecdysteroids. Furthermore, the structure of the stalk (funiculus) for the laid eggs attachment was analyzed. it consisted of the two superimposed vitelline envelopes which were likely modified by the cortical reaction exudate during the fertilization process. In addition, the successive secretory phases, regarding to the embryonic envelopes were evidenced. Finally, the ecdysteroid titers of embryonic stages were measured.
Tipo: Text Palavras-chave: Homarus gammarus; Malacostraca; Biological attachment; Hormones; Electrophysiology; Biochemistry; Cytology; Eggs; Embryonic development; Cell membranes; Oocytes; Fecundity; Homard; Decapode; Crustacé; Funicule; Mues embryonnaires; Enveloppe de fécondation; Ecdystéroîdes; Potentiel membranaire; Ovocyte.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1190.pdf
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Données sur la reproduction et la taille de première maturité du homard Homarus gammarus d'Iroise et du golfe de Gascogne ArchiMer
Latrouite, Daniel; Leglise, Michel; Raguenes, Gérard.
This paper deals with the lobsters caught by French fishermen off the "Conquet" (Iroise sea) and off "Ile d'Yeu" (Biscay Bay) on the French atlantic coast. The size at first maturity, defined as the size at which 50 % of female are able to reproduce, is deduced from the analysis of size frequency in landings. It is also shown that more than 50 % of the mature female are spawing each year ; the periods of hatching in the natural environment are also established.
Tipo: Text Palavras-chave: Size at maturity; Western Channel; Reproduction; Homarus gammarus; Lobster; Atlantic; Biscay Bay; Iroise sea; Golfe de Gascogne; Iroise; Manche; Taille de maturité; Reproduction; Homarus gammarus; Homard.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/acte-1414.pdf
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Etude préalable à la gestion des stocks de crustacés en Bretagne ArchiMer
Autissier, Isabelle; Coum, Andrée; Cuillandre, Jean Pierre; Veron, Gerard; Latrouite, Daniel.
At the end of the seventies, as fishing abundance (based on Catch Per Unit Effort) in crabs and lobster fishery steadily declined, operating expenses increased, and fishing boats changed strategy (changing metiers, covering larger distance to fishing areas, fishing seasons being extended, ...) professionals and scientists aimed to consider reinforcing management measures. To enlighten and support potential related decisions, the Comité Régional des Pêches et Cultures Marines de Bretagne (Regional Committee for fishing and farming in Brittany), together with the ISTPM (Ifremer since 1984), conducted a survey on the exploited populations and gave a review of the involved Breton fleet. This report shows the results of a survey conducted among fishermen,...
Tipo: Text Palavras-chave: Landings; Catch rates; Fishing area; Fishing effort; Fleet; Brittany; Edible crab; Lobster; Spider crab; Apport; Rendement; Zone de pêche; Effort de pêche; Flottille; Bretagne; Tourteau; Homard; Araignée.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/rapport-1548.pdf
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Expérience de repeuplement des fonds à partir de produits d'écloserie ArchiMer
Audouin, Jacques; De Kergariou, Gabriel.
Over the last decades, the fishing effort focused on crustaceans and especially on the lobster has continued to increase. This way, the number of pots used by each boat has grown from a few dozen to several hundred. This process lead to an overexploitation of the seabed and the catches do not go over 400 tonnes/years despite the increase of the means involved. Consequently, it has been necessary to implement a number of new measures to protect the lobster stock, and some restricted areas have been created off the French coasts.
Tipo: Text Palavras-chave: Homard; Crustacés; Ecloserie; Reproduction; Repeuplement.
Ano: 1977 URL: http://archimer.ifremer.fr/doc/1977/acte-6578.PDF
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Fécondités individuelle et par recrue du homard européen Homarus gammarus (L.) des cotes françaises ArchiMer
Latrouite, Daniel; Morizur, Yvon; Raguenes, Gerard.
Several relationships between the fecundity and the weight or the size of females have been studied for three different (based on "eye-index") stages of incubation. The relationship between the average weight of eggs at the beginning of incubation and the size of the females shows that the egg size varies according to the female's size. Loss of eggs during incubation has been studied ; the average loss between the two extreme stages of incubation is around 27%. This is a lowered value of what accurs during the whole incubation period. Egg losses are greater for small females than for big females. The annual frequency of spawning and size at first maturity have been determined in for differents fishing effort than by the commercial size.
Tipo: Text Palavras-chave: Maturity; Fecundity per recruit.; Reproduction; Europe; France; Lobster; Aquiculture; Homarus gammarus; Fecundity; Fécondité par recrue; Fécondité; Maturité; Reproduction; Homarus gammarus; Homard.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1404.pdf
Registros recuperados: 6
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