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
Seasonal variability of cephalopod populations: a spatio-temporal approach in the Western Mediterranean Sea
Puerta, P.; Quetglas, A.; Hidalgo, M. (2016). Seasonal variability of cephalopod populations: a spatio-temporal approach in the Western Mediterranean Sea. Fish. Oceanogr. 25(4): 373-389. https://dx.doi.org/10.1111/fog.12159
In: Fisheries Oceanography. Blackwell Science: Oxford. ISSN 1054-6006; e-ISSN 1365-2419
|  |
| Trefwoorden |
Cephalopoda [WoRMS]
Marien/Kust |
| Author keywords |
cephalopods;environmental variability;Mediterranean;population dynamics;seasonality;spatio-temporal trends |
| Auteurs | | Top |
- Puerta, P.
- Quetglas, A.
- Hidalgo, M.
|
|
|
| Abstract |
Cephalopod populations show wide temporal fluctuations in abundance, which have usually been investigated at inter-annual scales related to environmental variability. However, cephalopods are also strongly linked to seasonal environmental fluctuations owing to their short life cycles and single seasonal breeding. Therefore, population abundance critically depends on the success of breeding and recruitment from the previous year and the optimization of resources in a narrow period of favorable conditions. This adaptation of population dynamics is paramount in marked oligotrophic systems, such as the western Mediterranean Sea. We used monthly landings per unit effort (LPUE) to explore the spatio-temporal variability in seasonal patterns of three cephalopod species (Illex coindetii, Eledone cirrhosa and Octopus vulgaris). Common trends across the study area were characterized for each species. In all cases, seasonal patterns were geographically aggregated in relation to differences in local environment (i.e., primary production and surface hydro-climatology). Variability in the mean seasonal pattern over time was also investigated under contrasting environmental or population regimes. The mean seasonal trend was more pronounced in regimes of high-population densities, suggesting a density-dependent control that can modify the strength of the environmental forcing in the seasonal patterns. Our study also evidences a spatial synchrony in the seasonal fluctuations of LPUEs. Scales of synchrony ranged from 70 to 200 km, indicating a patchy-aggregated spatial pattern as a part of complex population structures in the western Mediterranean. Improving our understanding of seasonal dynamics of cephalopods across temporal and spatial scales may lead to improved forecasts and management strategies. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
