1. The relative weight of traditions, economics, and catch plans in New Zealand fleet dynamics
- Author
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Marchal, Paul, Lallemand, Philippe, and Stokes, Kevin
- Subjects
Fishers (Persons) -- Practice ,Bioeconomics -- Research ,Fishery management -- Environmental aspects ,Earth sciences - Abstract
We investigate the relative weights of catch plans, expected profit, and traditions in fishers' decision-making for five New Zealand fleets subject to an individual transferable quota (ITQ) management regime. Metiers were defined for these fleets as a combination of gears, management units, and a targeting index (either target species or statistical area). A nested logit random utility model was used to model the metier allocation of fishing effort in relation to catch plans, expected profit, and past fishing allocations. This study showed that traditions and catch plans appeared to be important determinants of fishers' behavior for these New Zealand fleets. The model developed in this study fitted the data generally well and was also able to predict, in most cases, future effort allocation both one month and one year ahead. Nous etudions le poids relatif des portefeuilles de captures, du profit attendu et des traditions dans le processus de prise de decision des pecheurs, dans le cas de six flottilles neo-zelandaises gerees par des quotas individuels transferables (ITQ). Plusieurs metiers ont ete definis pour ces flottilles, en utilisant une combinaison des engins de peche, des unite s de gestion et d?un indice de ciblage (soit les especes recherchees ou les regions statistiques). Un modele de choix discrets imbrique (<< random utility model >>) a ete utilise pour modeliser l'allocation de l'effort de peche en metiers, en utilisant les plans de peche, le profit attendu et les allocations de peche passees comme variables explicatives. Nous montrons que les traditions et les plans de peche sont d'importants determinants du comportement de peche dans le cas des flottilles neo-zelandaises etudiees. Le modele developpe dans cette etude est bien calibre par les donnees disponibles et peut permettre dans la plupart des cas de prevoir raisonnablement quelle sera l'allocation de l'effort de peche un mois, et meme un an a l'avance., Introduction Fleet dynamics, the key process bridging fisheries decision-makers and fish resources, has been subject to increased attention by the scientific community over the past 25 years (Hilborn 1985; Gillis [...]
- Published
- 2009