Apport des methodes d'ordination en typologie des flottilles

Biseau, Alain; Gondeaux, E.

doi:10.1093/icesjms/44.3.286

Cited by 38 publications

(35 citation statements)

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“…Multivariate methodology is used by a variety of authors to describe métiers using data on species composition in the catch (Murawski et al, 1983;Lewy and Vintheer, 1994;He et al, 1997;Biseau and Gondeaux, 1988;Jabeur et al, 2000;Silva et al, 2002), on relative catch composition profiles (Rogers and Pikitch, 1992), on catch per unit of effort (Bertignac, 1992) or combined approaches (Pelletier and Ferraris, 2000). The methodology used by Pelletier and Ferraris (2000) was modified for the data and purposes of this study.…”

Section: Analysis Methodologymentioning

confidence: 99%

Composition, temporal dynamics and regional characteristics of small-scale fisheries in Greece

Dimitriou²,

et al. 2005

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Section: Analysis Methodologymentioning

confidence: 99%

Composition, temporal dynamics and regional characteristics of small-scale fisheries in Greece

Dimitriou²,

et al. 2005

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“…The next step in the multivariate analysis was to apply principal component analysis (PCA) to the percentage data (Biseau and Gondeaux 1988). All the factorial axes were retained and the PCA scores (or factorial coordinates) were classified with hierarchical cluster analysis (HCA, using Euclidean distance and Ward's aggregation method, Pelletier and Ferraris 2000).…”

Section: Multivariate Analysismentioning

confidence: 99%

“…To make this decision, the skipper usually takes into account the season of the year (which is an indicator of target species availability), weather and market prices (Salas and Gaertner 2004). Following Pelletier and Ferraris (2000) and Laloë and Samba (1991) we term these combinations fishing tactics, although other names, such as métiers (Biseau and Gondeaux 1988) or fishing strategies (He et al 1997) can also be found in the literature. In practice, the number of fishing tactics that can be practiced by a boat in a small-scale fleet segment is constrained by the technological possibilities of a small boat (generally 6 to 14 m in length), the possibilities of investing in different gear types (boasts usually have a maximum of 2 or 3 main gear types plus a few secondary ones), the knowledge or tradition of the skipper, and in some cases the fishing gears that are legal in an area.…”

Section: Introductionmentioning

confidence: 99%

Fishing tactics dynamics of a Mediterranean small-scale coastal fishery

Maynou

Recasens

Lombarte

2011

Aquat. Living Resour.

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-We analyzed the small-scale fishery in the port of Vilanova i la Geltrú (NW Mediterranean) to assess the fishing practices in this fishery and produce economic indicators of its status. We defined the fishing tactics (or métiers) of this fishery with a multivariate analysis approach for evaluating the main fishery resources and fishing gears employed. Our results show that netters in this fishery practice 7 types of fishing tactics. Five of these fishing tactics, in terms of target species, gear and seasonality, are also used in other small-scale Mediterranean fisheries. The main types of fishing gear (trammel nets, gillnets) and target species (Sepia officinalis, Solea vulgaris, Mullus surmuletus and Merluccius merluccius), and a well defined seasonality, are also observed in other studies of Mediterranean small-scale fisheries. We show that the seasonal rotation of fishing tactics is determined by the availability of different fish species rather than market price. Identifying the fishing tactics, which in the Mediterranean are relatively limited in number, of small-scale fisheries provides information for developing monitoring and management strategies for these fisheries. We also assessed the economic performance of the small-scale fishery in Vilanova i la Geltrú and its conflicts with other uses of the coastal zone. We conclude that small-scale fisheries are an economically viable activity although seriously threatened by concurrent uses of the coastal zone (conflict with other extractive activities; competition for space with tourism and leisure activities; pollution). The integrated management of the uses of the coastal zone is necessary in order to sustain small-scale fisheries, which have become less important in economic terms, but which are an important social component of local coastal communities and are a source of high quality seafood with a low ecological impact.

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“…Principal component analysis (PCA) is a useful tool to describe a fishery, since it provides information about the relative importance of the main species in the catch composition, as well as about the variance explained by the single components obtained (Afifi and Clark, 1984). Consequently, a PCA (Biseau and Gordeaux, 1988;Laurec et al, 1989) with covariance scaling was performed on the transformed original data. As data contained the daily catch profiles per species and per boat for the studied period, we obtained a square matrix relating the 25 selected species (variables) with 25 principal components.…”

Section: Data Ordinationmentioning

confidence: 99%