Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
A Procrustean assessment of the European eel stock
Dekker, W. (2000). A Procrustean assessment of the European eel stock. ICES J. Mar. Sci./J. Cons. int. Explor. Mer 57: 938-947
In: ICES Journal of Marine Science. Academic Press: London. ISSN 1054-3139; e-ISSN 1095-9289
|  |
| Abstract |
No assessment of the state of the European eel stock is available due to the absence of adequate data for many areas of the continent. In contrast to past efforts which turned to complete the traditional catch composition data, and which met with little success, we will try to develop a simplified cohort-model (based on life stage, rather than age or size), simple enough for the available data. Under the (incorrect) assumption of stable recruitment and exploitation, the catch-at-life-stage analysis yields a preliminary assessment of the entire European stock, and for the glass eel importing and exporting countries. Recruitment is estimated at about 2000 million eels annually, most of whom enter countries around the Bay of Biscay, supporting intensive glass eel fisheries. Elsewhere, the natural recruitment is outnumbered by imported and transported glass eel. The fishing mortality rate accumulated over the total life span is estimated at 5.21 (=99%) for glass eel exporting countries and 3.25 (=96%) for glass eel importing countries. This Procrustean assessment provides a limited view on continent-wide stock. Substantially improved assessments are unlikely at the time-scale at which management action is required. However, the development of a co-ordinated system of inter and intra-national management (i.e., the only effective levels) will benefit the assessment of the European eel stock. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
