Details

Autor(en) / Beteiligte

• Baek, Min Jeong
• Lee, Young-Jae
• Choi, Kwang-Sik
• Lee, Won Chan
• Park, Hyun Je
• Kwak, Jung Hyun
• Kang, Chang-Keun

Titel

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

Ist Teil von

• Marine pollution bulletin, 2014-01, Vol.78 (1-2), p.137-145

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2014

Quelle

MEDLINE

Beschreibungen/Notizen

• •Phenology of the Manila clam was examined at the reclaimed and the natural flats.•Condition, biochemical composition, and reproductive cycle of the clams were compared.•Energy reserves in the clam tissues were lowered at the reclaimed flat in spring.•Gonadal development and spawning were delayed at the reclaimed flat.•Nutritionally stressful conditions at the reclaimed flat altered the clam phenology. 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.