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Developing An Invasive Carp-Based Aquaculture Feed To Benefit Louisiana Ecosystems And Economies: Assessing Carp Body Size, Lipid Content, And Diet Proxies Of Fish Harvested In Louisiana And Illinois
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2022
[PDF-254.28 KB]
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Description:Non-native, Invasive carp pose a threat to Louisiana ecosystems as they can out compete local fisheries species and alter the structure of aquatic food webs. One solution is to increase the use of Invasive carp as feedstock, but this requires assessing the viability and quality of Invasive carp harvested in Louisiana as a protein and oil source for aquaculture feed. To inform this knowledge gap, our study analyzed the size, lipid content (a proxy for nutrient quality), and isotope values of invasive carp fish from sampling sites in Louisiana and Illinois. ANOVA analyses were conducted to measure statistically significant differences of the carp among the Louisiana and Illinois sites. We found differences in Louisiana and Illinois carp relative to body size, isotope values (i.e., diet and trophic level), but not lipid content. Larger Louisiana fish would be advantageous and will yield more aquaculture feed product per fish. However, differences in body size and diets among Invasive carp in Louisiana and Illinois have the potential to influence the bioaccumulation and trophic magnification of contaminants, respectively. Further investigation focused on nutrient and contaminant profiles will allow us to determine if and how body size and diet variation may impact the potential for Invasive carp from Louisiana to be used as aquaculture feed.
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Rights Information:CC0 Public Domain
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