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Factors influencing mercury accumulation in three species of forage fish from Caddo Lake, Texas, USA 被引量:3
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作者 Matthew M Chumchal Ray W Drenner +1 位作者 david R Cross k david hambright 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2010年第8期1158-1163,共6页
Most studies that have examined mercury (Hg) contamination of fish have focused on game species feeding near the top of the food web, while studies that examine forage fish that feed near the base of the food web ar... Most studies that have examined mercury (Hg) contamination of fish have focused on game species feeding near the top of the food web, while studies that examine forage fish that feed near the base of the food web are rare. We conducted a survey of Hg contamination in three species of forage fish, brook silverside (Labidesthes sicculus), threadfin shad (Dorosoma petenense) and gizzard shad (Dorosoma cepedianum), from Caddo Lake, Texas, USA and found species-specific differences in Hg concentrations. We examined total length, age, trophic position (determined using δ15N), and growth rate of forage fish as factors that could have influenced within-and between-species differences in Hg concentration. Total length and age were the best predictors of within-species differences in Hg concentration. Between-species differences in Hg concentrations were most strongly influenced by trophic position. 展开更多
关键词 MERCURY trophic position forage fish
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