Affordable Access

Comparison of events in the seasonal cycle for Donax vittatus and D. trunculus in european waters

Publication Date
  • Biology
  • Chemistry


Comparison of events in the seasonal cycle for Donax vittatus and D. trunculus in european waters ReprùJted from CYCLIC PHENOMENA IN MARINE PLANTS AND ANI MALS Edited by E. NAYLOR and R. G. HARTNOLL PERGA MON PRESS OXFORD and NEW YORK 1979 • , . Comparison of Events in the Seasonal Cycle for Donax vittatus and D. trunculus in European Waters Alan D. Ansell· and A. Bodoy· • • Dunstaffnage Marine Research Labaratory. p.o. Box No. 3, Oban. Scotland •• Station Marine d 'Endoume, Marseille 13007, France ARSTRACT The events of the sessonal cyc 1~ ~r, r Q. vittatus from the Firth of Forth , S~otland , and ] . trunculus from the Camarque coast, France, are described with relation ta population structure, rate of snell growth, reproductive activities and sessons1 changes in tissue weight and bjochemical composition. The Mediterraneen species sho":s a longer reproduc t ive period , and an extend ed growing Be8son, accompanied by smaller sessonsl fluctuations in rates of change of tissue weight reflecting a reduced dependence on reserve storage in the sessonsl cycle. The role of tem perature and food supply in the cycles are discussed. INTRODUCTION The results described here form a part of conti nuing studies of the effects of temperature on the biology of mo11uscs from sandy sediments of the European Mediterranean and Atlantic coasts. These studies comprise determinations of the extrerue upper limits of thermal tolerance. and of the upper temperature limits at which normal activities, such as the burrowing response, are retainedj and the Evaluation of effects of variation in temperature below these limits on as pects of reproduct ion, biology and energetics of common species of biva lves and gastropods. They are based on collaborative comparative investigations of the same or c10sely related species from the Kediterranean coast, near Marseille, and from the Scottish coast, made on the one hand at the Station Marine d'Endoume, Marseille, and on the other,

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times