Body size scaling relationships in bivalves: a comparison of field data with predictions by Dynamic Energy Budgets (DEB theory)
Cardoso, J. F. M. F., Veer, H. W. van der and Kooijman, S. A. L. M. 2006.
Body size scaling relationships in bivalves: a comparison of field data with predictions by Dynamic Energy Budgets (DEB theory).
J. Sea Research, 56: 125 - 139
Abstract
In this paper, we apply the Dynamic Energy Budget (DEB) theory to
bivalve species (1) to provide basic body-size scaling relationships
that can be used to predict species characteristics when basic
information is lacking, and (2) to analyse the discrepancy between DEB
predictions based on energetic constraints and field observations, in
order to identify potentially important factors in life history
strategy of bivalves. Body-size scaling relationships were identified
for size at first reproduction, Von Bertalanffy growth parameter, and
egg and larval development time in relation to egg and larval volume
and temperature conditions. Due to their small egg volume, bivalve
species are characterised by a relatively short pelagic larval
stage. The main discrepancy between field observations and DEB
predictions was in the relationship between egg and larval volume and
adult body volume. In bivalves, the characteristics of the early life
stages are not related to body size of the species. Since the minimum
size of settling larvae is always larger than 125 µm, it is suggested
that successful settlement might be the key factor. Settlement size or
volume of the fragile larvae must be in balance with the sediment
composition, i.e. similar to or larger than that of the sediment grain
size.