Seasonal-Changes In The Physiology Reproductive Condition And Carbohydrate Content Of The Cockle Cardium (=Cerastoderma) Edule (Bivalvia Cardiidae)

Newell, RIE and Bayne, BL 1980 Seasonal-Changes In The Physiology Reproductive Condition And Carbohydrate Content Of The Cockle Cardium (=Cerastoderma) Edule (Bivalvia Cardiidae). Marine Biology, 56 (1). Nov-19. https://doi.org/10.1007/BF00390589

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Abstract/Summary

Pronounced seasonal cycles in the rates of oxygen consumption and feeding were found for Cardium (=Cerastoderma) edule L. measured in the field under ambient conditions. The cockles had a maximum rate of oxygen consumption (0.89 ml O2 g-1 h-1) in April which declined to a minimum of 0.35 ml O2 g-1 h-1 in March. Their feeding rate was variable but had a maximum value (3.91 l g-1 h-1) in April and a minimum value (0.73 l g-1 h-1) in October. There was no apparent seasonal variation in absorption efficiency, with a mean value of 67.6%. Gametogenesis was initiated in January and the population reached a peak in reproductive condition in April/May, followed by a 3 month spawning period. Carbohydrate reserves were synthesised during spawning, and were then utilised during the winter and early spring. An adaptive function for a reduction in time spent feeding is postulated, and correlations between the rates of certain physiological processes and some exogenous and endogenous variables are discussed.

Item Type:	Publication - Article
Divisions:	Plymouth Marine Laboratory > Other (PML)
Depositing User:	EPrints Services
Date made live:	11 Feb 2014 15:54
Last Modified:	06 Jun 2017 16:03
URI:	https://plymsea.ac.uk/id/eprint/2798

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