ISSN:
1365-3121
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Geosciences
Notes:
Late Cretaceous rudist bivalves have been well studied in terms of taxonomy, stratigraphy and sedimentological context, but their palaeobiological aspects are poorly known and important questions remain unanswered such as those relating to reproduction and population dynamics. The analysis of a three-dimensional high-resolution dataset allowed a detailed evaluation of the ecology and population dynamics of the rudist Hippuritella vasseuri (Douvillé). Our research demonstrates that significant turnover of generations and a stable packing rate characterizes stable and healthy ecological conditions whereas decreasing packing rate, increasing larval mortality and the arrival of non-hippuritid organisms characterize an association in decline. H. vasseuri reproduced in a cyclical (annual or biannual) pattern, as shown in vertical projection by five equidistant peaks of larval recruitment density within 60 mm of section. Survival chances of rudist larvae appear to have been unrelated to initial available space for settling but are favoured by subsequent increasing space and a low number of coeval competitors.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1046/j.1365-3121.2003.00515.x
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