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Biol Bull 155: 259-272. (October 1978)
© 1978 Marine Biological Laboratory
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SEASONAL PATTERNS IN THE BIOCHEMICAL CONSTITUENTS AND BODY COMPONENT INDEXES OF THE MURICID GASTROPOD, THAIS HAEMASTOMA

B. WOLFANGER BELISLE 1 and WILLIAM B. STICKLE 1

1 Department of Zoology and Physiology, Louisiana State University, Baton Rouge, Louisiana 70803 U. S. A.

1. Seasonal changes in the body component indexes of Thais haemastoma were studied over a 15 month period. Seasonal changes in the protein, carbohydrate and lipid level and content were determined for soft components over a 12 month period.

2. The capsule-albumin gland index was determined to be the best indicator of reproductive readiness in Thais haemastoma. This index cycled in a bimodal pattern, peaking in April and July.

3. Male testis-digestive gland and remaining visceral mass indexes cycled seasonally with major peaks in April and secondary peaks in September and October, respectively. The female ovary-digestive gland cycled in a unimodal pattern, peaking in April. Changes in the shell index of both sexes were found to reflect changes in the sum total of the soft body indexes.

4. Seasonal changes in protein, carbohydrate and lipid content were found to be predominantly due to changes in component indexes and not to fluctuations in constituent levels.






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Copyright © 1978 by the Marine Biological Laboratory.