Spatial and temporal trends of muscle lipid content in Great Lakes fishes: 1970s–2008

An evaluation of spatial and temporal trends in fish lipid content may provide insight into trends of lipophilic contaminant levels, fish population health, and nutritional benefits to fish consumers. Currently, little is known about lipid content in fishes of the Great Lakes, where commercial and r...

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Bibliographic Details
Published in:Canadian journal of fisheries and aquatic sciences 2012-12, Vol.69 (12), p.2007-2017
Main Authors: NEFF, Margaret R, BHAVSAR, Satyendra P, JANICE XIN YAN CHIN
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
Contaminants
Coregonus clupeaformis
Cyprinus carpio
Environmental aspects
Environmental changes
Esox lucius
Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.)
Fish
Fish populations
Fisheries
Fishes, Fresh-water
Food contamination & poisoning
Fresh water ecosystems
Freshwater
Fundamental and applied biological sciences. Psychology
Health aspects
Lakes
Lipids
Measurement
Muscular system
Oncorhynchus
Oncorhynchus kisutch
Oncorhynchus mykiss
Oncorhynchus tshawytscha
Perca flavescens
Physiological aspects
Salmo trutta
Salvelinus namaycush
Sander vitreus
Synecology
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Summary:An evaluation of spatial and temporal trends in fish lipid content may provide insight into trends of lipophilic contaminant levels, fish population health, and nutritional benefits to fish consumers. Currently, little is known about lipid content in fishes of the Great Lakes, where commercial and recreational fisheries are important. We examined 35+ years of muscle lipid content data for ten Great Lakes fishes from Canadian waters and found lipid content to have significantly (p < 0.05) declined in 2/6 species in Lake Superior, 3/8 species in Lake Huron, 1/8 species in Lake Erie, and 5/10 species in Lake Ontario. Lake Erie showed the least number of declining trends and most increasing trends (2/8 populations, p < 0.1). For most species, recent (2000–2008) muscle lipid values for Lakes Erie and Ontario are significantly higher compared with Lakes Superior and Huron. These observed trends may be linked to a number of environmental changes within the Great Lakes, and the mechanism(s) of decline are likely to be complex.
ISSN:0706-652X
1205-7533
DOI:10.1139/f2012-121