Growth, Reproductive Output, and Energy Partitioning in Weathervane Scallops, Patinopecten caurinus, from British Columbia
Citations Over Time
Abstract
Major differences in population growth and reproductive characteristics of Patinopecten caurinus were related to water temperatures and food sources associated with collection sites in the Strait of Georgia and off the west coast of Vancouver Island. Inshore populations were dominated by larger, faster growing scallops that apparently live longer than offshore scallops. Individuals from the inshore site exhibited enhanced reproductive output total production, and turnover ratios compared with offshore scallops. Histological and stereological techniques were used to assess the annual reproductive cycle. Results revealed a single but protracted spawning period for inshore scallops beginning in mid-April and ending in mid-June whereas offshore scallops spawned during July and August. As scallops grew older there was a gradual shift in emphasis from growth to reproduction in addition to periods when gametogenesis proceeded at the expense of somatic tissue. The quantity of available energy invested m reproduction may restrict growth periods and limit the amount of growth for bivalve species from various habitats.
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