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  • 1
    Publication Date: 2021-05-19
    Description: The results are given of a study of the dolphinfish Coryphaena hippurus fishery production in coastal waters of Tunisia; catches were caught during a survey which lasted 3-4 months. Spatio-temporal fluctuations of the production were analyzed with respect to physico-chemical parameters (temperature and salinity) and exploitation data (recording of contributions, increase of landing sites). Details are given of the catching techniques using fish aggregating devices. The total size at recruitment was estimated at 15 cm. The average sizes were determined throughout the duration of the survey.
    Description: Published
    Keywords: Marine fisheries ; Fishery surveys ; Catching methods ; Exploitation ; Coryphaena hippurus ; Marine
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp. 1-14
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  • 2
    Publication Date: 2021-05-19
    Description: Des donnees de production et d'effort de peche ont ete recueillies aupres des services de la Direction Generale de la Peche et de l'Aquaculture (DGPA). Ces donnees s'etendent sur onze ans (1987-1997). L'unite d'effort selectionnee est le produit du nombre de jours en mer et de la jauge brute (JM*JB). L'application des modeles de production (Fox et Shaefer) a ces donnees montre que les stocks de chevrette actuellement exploites sont proches de leur optimum d'exploitation. Ainsi, un leger accroissement d'effort pourrait etre envisage mais le developpement de la peche de la chevrette passe, inevitablement, par l'exploration de nouvelles zones de peche
    Description: Production and fishing effort data have been collected at services of the Tunisian Fisheries and Aquaculture General Direction DGPA. These data concern eleven years (1987-1997). The selected effort unit is the fishing days and gauge tonnage (FD*GT), which combine fishing days and stored capacity of boat. The application of production models (Fox and Shaefer) to these data shows that stocks of deep-water pink-shrimps P. longirostris currently exploited are close to their optimum exploitation. Thus, a light increase of effort should be envisaged but the development of the fishing stocks of this species must be passing by the exploration of new fishing zones
    Description: Published
    Keywords: Evaluation des stocks ; Fishing vessels ; Shrimp culture ; Shrimp fisheries ; Abundance ; Stock assessment ; Marine aquaculture ; Fishing effort ; Biomass ; Parapenaeus longirostris ; Marine
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp. 5-16
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  • 3
    Publication Date: 2021-05-19
    Description: En vue de realiser une premiere evaluation du stock des especes halieutiques benthiques exploitees dans le golfe de Gabes, des donnees de production et d'effort de peche ont ete recueillies et analysees. Ces donnees s'etendant sur une periode de 9 annees (1980-1988) concernant les differents types de flottilles operant dans cette region. De nombreuses correlations ont ete testees afin de selectionner l'unite d'effort adequate a employer dans la presente etude. L'ajustement des modeles synthetiques (SCHAEFER et FOX) aux donnees de production et d'effort a montre que la situation d'exploitation optimale est depasee, depuis 1988, d'environ 20 p. 100.
    Description: In order to realize a first assessment of exploited stock of benthic species in the gulf of Gabes, data on production and fishing effort have been collected and analysed. These data cover a period of 9 years (1980-1988) for differents types of the fleets operating in the region. A number of correlations were tested in order to select the adequate fishing effort unit to use in this evaluation. The ajustment of synthetic models (Schaefer and Fox) to the data on production and fishing effort unit emonstrated that optimal exploitation has been passed since 1988 by 20%
    Description: Published
    Keywords: Stock benthique ; Marine fisheries ; Overexploitation ; Stock assessment ; Statistical analysis ; Fishing effort ; Fishery resources ; Benthos ; Marine
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp. 23-38
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