Metabolic Capacities and Immunocompetence of Sea Scallops (Placopecten magellanicus, Gmelin) at Different Ages and Life Stages

Nicolas Pichaud; Sandrine Briatte; Véronique Desrosiers; Jocelyne Pellerin; Michel Fournier; Pierre Ulrich Blier

doi:10.2983/035.028.0416

Translator Disclaimer

1 December 2009 Metabolic Capacities and Immunocompetence of Sea Scallops (Placopecten magellanicus, Gmelin) at Different Ages and Life Stages

Nicolas Pichaud, Sandrine Briatte, Véronique Desrosiers, Jocelyne Pellerin, Michel Fournier, Pierre Ulrich Blier

Author Affiliations +

J. of Shellfish Research, 28(4):865-876 (2009). https://doi.org/10.2983/035.028.0416

Abstract

We evaluated the development of metabolic capacities, immunocompetence, and growth patterns according to sex, age, and gametogenesis stages among scallops Placopecten magellanicus from the Magdalen Islands (Québec, Canada). Our 2-y study allowed us to evaluate in detail both seasonality and interannual variability of their physiological state. Enzymes— namely, phosphoglucose isomerase, phosphomannose isomerase, pyruvate kinase, aspartate aminotransferase, citrate synthase, chymotrypsin, and lipase were assessed in muscles and digestive glands of scallops. Immunocompetence was evaluated by measuring hemocyte activity in hemolymph and the efficiency of phagocytic cells. The various reproductive stages were identified with histological examination, and growth was estimated using digestive gland and gonadosomatic indices. Lipase and phagocytosis appeared to be good biomarkers of the physiological state of scallops in relation to their age and reproductive stage: Lipase activity is higher in young scallops (2 y old) as well as during the development and the ripe stages, and is associated with low phagocytic activity. Results suggest that the lipid digestion capacity may increase to improve lipid conversion during the development and ripe stages. After this period, metabolic reserves were presumably used to synthesize hemocytes at a higher rate and to rebuild gonadal tissue. The regulation of the reproductive cycle and immunocompetence was observed to depend directly on the environmental parameters without concomitant changes in the activity of the measured enzymes of the energy metabolism.

Citation Download Citation

Nicolas Pichaud, Sandrine Briatte, Véronique Desrosiers, Jocelyne Pellerin, Michel Fournier and Pierre Ulrich Blier "Metabolic Capacities and Immunocompetence of Sea Scallops (Placopecten magellanicus, Gmelin) at Different Ages and Life Stages," Journal of Shellfish Research 28(4), (1 December 2009). https://doi.org/10.2983/035.028.0416

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Password Forgot your password?

Show

Remember Email on this computer

Remember Password

No BioOne Complete account? Create an account
or Access Institutional Sign In via Shibboleth or OpenAthens

PURCHASE THIS CONTENT

PURCHASE SINGLE ARTICLE

Price: $10.00 ADD TO CART

Includes PDF & HTML, when available

RIGHTS & PERMISSIONS

Show All Keywords

KEYWORDS/PHRASES

PUBLICATION TITLE:

PUBLICATION YEARS