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Short‐term physiological response of the Pacific oyster, Crassostrea gigas , on exposure to varying levels of polycyclic aromatic hydrocarbon
Author(s) -
Kim MuChan,
Cho SangMan,
Jeong WooGeon
Publication year - 2007
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2007.01821.x
Subject(s) - crassostrea , polycyclic aromatic hydrocarbon , oyster , biology , acclimatization , aromatic hydrocarbon , zoology , pacific oyster , perna viridis , environmental chemistry , respiration , ostreidae , excretion , shellfish , ecology , fishery , mussel , aquatic animal , chemistry , botany , biochemistry , fish <actinopterygii> , astrobiology , catalysis
Abstract In the present study, we investigate the short‐term adaptive physiological strategies to polycyclic aromatic hydrocarbon (PAH) of Pacific oysters, Crassostrea gigas , by exposing the oysters to varying levels of PAH (0, 50, 100 and 200 μg L −1 ) for 7 days with a 3‐day acclimation period under laboratory conditions. The filtration rate ( FR ) and respiration rate ( R ) increased significantly at 50 μg L −1 PAH and decreased at 100 and 200 μg L −1 compared with the control. The absorption efficiency ( Abs. eff .) was significantly impaired at 200 μg L −1 PAH. Ammonia excretion ( E ) increased with increasing PAH levels, with a significant elevation at 200 μg L −1 . Although a significantly elevated FR was observed, oysters exposed to 50 μg L −1 PAH showed scope for growth (SFG) similar to the control. This indicates that even at nominal levels, PAH contamination is a possible cause of reduced oyster production because of increased food demand. The oysters exposed to 200 μg L −1 PAH showed negative SFG values, which could be a possible cause of growth stagnation or even mortality when the exposure is chronic.