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Gill damage to juvenile orange‐spotted grouper E pinephelus coioides ( H amilton, 1822) following exposure to suspended sediments
Author(s) -
Wong Chong Kim,
Pak Ivy Ah Pan,
Jiang Liu Xiang
Publication year - 2013
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.1365-2109.2012.03173.x
Subject(s) - epinephelus , gill , biology , grouper , juvenile , fishery , zoology , environmental chemistry , veterinary medicine , fish <actinopterygii> , ecology , chemistry , medicine
Juvenile E pinephelus coioides were exposed to three nominal concentrations (8, 32, 128 mg wet sediments L −1 ) of suspended sediments ( SS ) from P ort S helter ( PS ), Mirs Bay ( MB ) and Victoria Harbour ( VH ) for 10 and 30 days using semi‐static system. Sediments from VH contained higher concentrations of Cu and polycyclic aromatic hydrocarbons ( PAH s) than sediments from PS and MB . Gill damages including lamellar blood sinus dilation and vascular congestion were prevalent after just 10 days of exposure to SS . Fish exposed to SS at the highest concentration of 128 mg L −1 showed higher incidence of lamellar aneurism. Hyperplasia in the base of lamellae was recorded in fish that had been exposed to contaminated SS from VH . Significant increases in the density of chloride cells and mucous cells were found on the gills of fish that had been exposed to 128 mg L −1 of SS from PS . Clogging of gills by SS produced hypoxic‐like responses in fish. Polluted sediments from VH produced addictive or synergistic effects between SS and chemical contaminants on fish.