Use of otolith chemistry to discriminate juvenile Chinook salmon (Oncorhynchus tshawytscha) from different wild populations and hatcheries in Lake Huron |
| |
Authors: | Stephen AC Marklevitz Brian J Fryer |
| |
Affiliation: | a Department of Biology, University of Western Ontario, 1151 Richmond St., London, Ontario, Canada N6A 5B7b Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Ave., Windsor, Ontario, Canada N9B 3P4c Upper Great Lakes Management Unit, Ontario Ministry of Natural Resources, 1450 Seventh Ave. East, Owen Sound, Ontario, Canada N4K 2Z1d Alpena Fisheries Research Station, Michigan Department of Natural Resources, 160 East Fletcher St., Alpena MI 49707-2344, USAe Department of Biological Sciences, Lake Superior State University, 650 West Easterday Ave. Sault Ste. Marie, MI 49783, USA |
| |
Abstract: | Chinook salmon (Oncorhynchus tshawytscha) in Lake Huron consist of wild and hatchery-reared fish distributed among several populations. This study tested whether otolith chemistry can be used to identify the natal origin of Chinook salmon in this system. Concentrations of nine elements (Mg, K, Mn, Fe, Zn, Rb, Sr, Ba, and Pb) in the otoliths of Chinook salmon juveniles from 24 collection sites (17 streams and 7 hatcheries) around Lake Huron were analyzed using laser-ablation inductively-coupled mass spectrometry. Differences in otolith chemistry were found between rearing environments (wild and hatchery), among geological regions (Precambrian, Ordovician, Silurian, Devonian, and Carboniferous), and among collection sites. Discriminant function analysis showed high classification accuracies of juveniles to their rearing environment (wild versus hatchery, 82%), geological region (84%), and collection site (87%) of origin. With these values, there is excellent potential for otolith chemistry to be used to predict the natal origin of adults, and thus inform research and management of Chinook salmon in Lake Huron. |
| |
Keywords: | Elemental concentration Natal origin Tagging Fisheries management Population structure Freshwater lake |
本文献已被 ScienceDirect 等数据库收录! |
|