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Title: Gadoid feeding: an empirical and theoretical study of factors affecting food consumption and composition in North Sea gadoids, with emphasis on juvenile cod, Gadus morhua (L.) and whiting, Merlangius merlangus (L.)
Author: Singh-Renton, Susan
Awarding Body: University of Buckingham
Current Institution: University of Buckingham
Date of Award: 1990
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Laboratory experiments were conducted to estimate and compare the gastric evacuation rates, in small cod. Gadus morhua and whiting. Merlangius merlangus (Total length (TL): 20-35 cm), of different types of prey, prey sizes and water temperatures. In addition, the stomach contents of 899 whiting (TL: 18-33 cm), sampled from various parts of the southern and central North Sea , were analysed to determine diet composition, the existence of a diel feeding rhythm and an estimate of the average daily intake of Cranqon vulgaris. Alternative methods for (i) a more direct estimation of relative prey suitability, (ii) treatment of catch-At-age and feeding data in providing estimates of stock size, fishing and predation mortalities, and (iii) smoothing of predation mortality estimates produced within MSVPA, were also investigated.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available