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
| one publication added to basket [210709] |
Genetic and morphometric heterogeneity among recruits of the European eel, Anguilla anguilla
Pujolar, J.M.; Maes, G.E.; Volckaert, F.A.M.J. (2007). Genetic and morphometric heterogeneity among recruits of the European eel, Anguilla anguilla. Bull. Mar. Sci. 81(2): 297-308
In: Bulletin of Marine Science. University of Miami Press: Coral Gables. ISSN 0007-4977; e-ISSN 1553-6955
|   |
| Auteurs | | Top |
- Pujolar, J.M.
- Maes, G.E.
- Volckaert, F.A.M.J.
|
|
|
| Abstract |
The recognition of the vulnerability of marine species to environmental conditions throughout their life-cycle has broadened the scope of investigations on factors influencing their population dynamics and demographics. The European eel Anguilla anguilla (Linnaeus, 1758) stock is declining rapidly due to overfishing, pollution, habitat degradation, diseases, and oceanic conditions. We analyzed arrival waves of glass eels collected in the Bay of Biscay and the western Mediterranean area during the period 2001-2003. We observed significant differences in length, weight, and condition between Atlantic and Mediterranean samples, and among arrival waves within sites. All samples were screened for genetic variation using ten allozyme and six microsatellite loci. We observed a pattern of genetic patchiness among arrival waves, namely a highly significant genetic differentiation without a temporal grouping of samples. Although natural selection and gene flow could also play a role, we suggest that the pattern observed results from the high variance in reproductive success in each spawning season. A low effective population size might have contributed to the current decline in the abundance of European eel. A precautionary approach to fisheries should be implemented in order to preserve maximal genetic potential to cope with changing anthropogenic and environment pressures. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
