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Mar Pollut Bull. 2014 Jan 15;78(1-2):137-45. doi: 10.1016/j.marpolbul.2013.10.050. Epub 2013 Dec 2.

Physiological disturbance of the Manila clam, Ruditapes philippinarum, by altered environmental conditions in a tidal flat on the west coast of Korea.

Author information

1
Ocean Science and Technology Institute, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea.
2
School of Marine Biomedical Science and Marine and Environmental Research Institute, Jeju National University, Jeju 690-756, Republic of Korea.
3
Marine Environment Research Division, National Fisheries Research and Development Institute, Busan 619-705, Republic of Korea.
4
Ocean Science and Technology Institute, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea. Electronic address: ckkang@postech.ac.kr.

Abstract

To examine the influence of habitat alteration by tideflat reclamation on the physiological ecology of Ruditapes philippinarum, seasonal variations in its condition, gross biochemical composition, and reproductive cycle were compared for a yearly cycle between a reclaimed flat (Gomsohang, GS) and a natural flat (Hajun, HJ) in Gomso Bay, Korea. Concentrations of chlorophyll a and seston (as well as its energy value 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, their spring gametogenic development and spawning were advanced at HJ compared with GS. Our results suggest that the Manila clam encounters nutritionally stressful environmental conditions in altered habitats after tideflat reclamation that lead to lowered nutrient accumulation and a changing reproductive cycle.

KEYWORDS:

Biochemical composition; Food availability; Habitat alteration; Physiological disturbance; Reproductive cycle; Ruditapes philippinarum

PMID:
24295594
DOI:
10.1016/j.marpolbul.2013.10.050
[Indexed for MEDLINE]
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