Document Detail
Growth and Reproduction in Bivalves: an energy budget approach
Abstract/OtherAbstract :
In estuarine areas, like the Wadden Sea, there are large differences in environmental conditions (i.e. temperature, salinity, food and currents), which influence growth, survival and reproduction of benthic animals. This thesis studied the effect of environmental conditions on growth and reproduction of five common bivalve species: the Baltic tellin Macoma balthica, the cockle Cerastoderma edule, the mussel Mytilus edulis, the soft-shell clam Mya arenaria and the recently introduced Pacific oyster Crassostrea gigas, which has been strongly increasing in numbers. During more than a year, field data for these species has been collected in different habitats (intertidal and subtidal of the Wadden Sea, and the North Sea coastal zone) and analysed using a general framework, the ‘Dynamic Energy Budget (DEB)’ model. By using this model, food conditions for the various species in the different habitats could be reconstructed. All species presented a seasonal pattern in growth, with body condition increasing in spring and summer and decreasing in winter. Differences in growing period occurred between species and within species in different habitats. The timing of spawning and reproductive investment also differed between species and habitats. DEB model simulations suggested that food limitation occurred and that food conditions were insufficient for maximum growth. Besides, for the Baltic clam Macoma balthica, the current summer temperatures seem to be already too high for optimal growth. These results suggest that food competition must have occurred between species and that climate change may have serious consequences on bivalve productivity in the Wadden Sea.
Authors :
Cardoso, Joana Ferreira Marques Ferreira
Related Documents :
1290949 - Body-size related survival of cladocerans in a trophic gradient: an enclosure study
3472409 - Biology, ecology and trophic interactions of elasmobranchs and other fishes in riverine...
2659649 - Annotated checklist of dung-associated beetles of the savanna ecosystem project study a...
31452239 - Notes on the lesser dung flies emerged from fungi in japan (diptera, sphaeroceridae).
1143779 - The biology of lymnaea peregra (muller) (gastropoda:pulmonata: basommatophora) with spe...
33164629 - Threats to wildlife and their utilizable products in the cross river rainforest, nigeria
1290949 - Body-size related survival of cladocerans in a trophic gradient: an enclosure study
33824269 - Population dynamics of brown shrimp (crangon crangon) in the belgian coastal waters: 2....
469019 - Seasonal food web models for the oregon inner-shelf ecosystem : investigating the role ...
Contributors :
-
Publication Detail :
Publisher :  University of Groningen     Type :  Dissertation     Format :  -    
Date Detail :
2007-01-01
Subject :
Bivalvia, Voortplanting (biologie), Proefschriften (vorm)
Coverage :
-
Relation :
-
Source :
-
Copyright Information :
University of Groningen
Other Details :
Languages :  en_UK    
Export Citation :
APA/MLA Format     Download EndNote     Download BibTex

Previous Document:  Structural studies on a secretion chaperone from Shigella flexneri and crystallographic explorations...
Next Document:  New ways in RGD-peptide mediated drug targeting to angiogenic endothelium: On the nature of drugs, l...