Data acquisition of fishing captures in the management of fish populations, constraints and methods as a function of objectives: the eel example

The manager often needs to have information on fishermen's activity and their captures on variable scales, depending on the ecology of the species, with regard to fish species that exhibit some fishing interest. In France, an important delay exists in terms of collecting social-economic data on...

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Bibliographic Details
Main Authors: Elie, Pierre, Rochard, Eric, Babin, Didier
Other Authors: Aquaculture et pêche (UR APBX), Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF)
Format: Conference Object
Language:French
Published: HAL CCSD 1994
Subjects:
Online Access:https://hal.inrae.fr/hal-02574855
Description
Summary:The manager often needs to have information on fishermen's activity and their captures on variable scales, depending on the ecology of the species, with regard to fish species that exhibit some fishing interest. In France, an important delay exists in terms of collecting social-economic data on these activities in continental waters. However, after experimentation, it was found that access to this type of information was possible, should adapted techniques and methods be developed. It seems also that, if some precautions are taken, these data can be collected from fishermen and they can be used to demonstrate and understand particular biological phenomena. To illustrate this, the eel, Anguilla anguilla L., a amphihaline migratory fish, that has a particularly complex cycle and that is used at any of its life stages in continental waters, has been selected. Two very different examples are voluntarily developed. The first consits in evaluating eel production by fluvial professional fishermen at the national level, using certain survey and result interpretation techniques. The second consist in characterizing and quantifying glass-eel migration, using the "Captures par l'Unité d'Effort" (CPUE) obtained through monitoring of a professional fishery in a fluvio-estuarine system. Vis-à-vis des espèces de poissons d'intérêt halieutique, le gestionnaire a souvent besoin d'obtenir des informations sur l'activité des pêcheurs et les prélèvements qu'elles occasionnent, à des échelles variables selon l'écologie de l'espèce. En France, un retard important existe actuellement en matière de collecte de données socio-économiques sur ces activités dans les eaux continentales. Pourtant, après expérimentation, il s'avère que l'accès à ce type d'information est envisageable si l'on développe des techniques et des méthodes adaptées. Il semble également que moyennant certaines précautions, les données pouvant être récupérées auprès des pêcheurs peuvent permettre la mise en évidence et la compréhension de phénomènes biologiques ...