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Spatial heterogeneity in gross biochemical composition and reproductive cycle of the Manila clam Ruditapes philippinarum in a macrotidal embayment of Korea

Title
Spatial heterogeneity in gross biochemical composition and reproductive cycle of the Manila clam Ruditapes philippinarum in a macrotidal embayment of Korea
Authors
백민정
Date Issued
2013
Publisher
포항공과대학교
Abstract
To examine the influence of habitat disturbance by tideflat reclamation on phenology of Ruditapes philippinarum, seasonal variations in its condition, gross biochemical composition, and reproductive cycle were compared for a year between an adjacent site (GS) to the reclaimed flat and a reference site (HJ) of natural flat in Gomso Bay of Korea. Concentrations of chlorophyll a, seston, and food energy as food available to the clam were consistently higher at HJ than at GS. Condition, dry tissue weight, and energy reserves (proteins and carbohydrates) of the clams were much higher at HJ than at GS during spring−summer when fast growth and gametogenic development occur. Furthermore, clams gametogenic development in spring were advanced at HJ and thereby spawning delayed a month at GS. Our results suggested that the Manila clam in the altered habitats meet with nutritionally stressful environmental conditions that lead to lowered nutrient accumulation and changing reproductive cycle.
URI
http://postech.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000001628585
http://oasis.postech.ac.kr/handle/2014.oak/2026
Article Type
Thesis
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