caa a22 4500 606227539 CHVBK 20210128101158.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s10641-014-0309-9 doi (NATIONALLICENCE)springer-10.1007/s10641-014-0309-9 The effect of multiple spawning events on cohort genetic diversity of lake sturgeon ( Acipenser fulvescens ) in the Kaministiquia River [Elektronische Daten] [Amy Welsh, Melinda Baerwald, Michael Friday, Bernie May] Lake sturgeon Acipenser fulvescens populations have experienced declines throughout much of the Great Lakes. Understanding key demographic characteristics about lake sturgeon populations can help identify potential limiting factors to their recovery. Within a single spawning season, there may be multiple spawning events, which could affect genetic diversity of the resulting cohort. Our objective was to determine whether multiple discrete spawning events resulted in a larger effective number of breeders and higher genetic diversity. Larval samples were collected following the spawning periods in 2005 (n = 479) and 2006 (n = 279). In 2005, there were two discrete spawning events and a longer spawning season; in 2006, the spawning events were less discrete and the spawning season was shorter. Genetic samples from larval sturgeon were analyzed at 12 microsatellite loci. The effective number of breeders (Nb), genetic diversity (observed heterozygosity, expected heterozygosity, allelic richness, inbreeding coefficient), and relatedness were measured for each cohort. The effective population size (Ne) and genetic diversity were also measured in the adult population (n = 85). The larval cohorts had a high Nb (2005: 54; 2006: 73) relative to the Ne of the adult population (Ne = 28). Multiple spawning events did not result in more breeders, but did result in lower relatedness among the resulting offspring. Therefore, environmental factors should be maintained that encourage an extended spawning season, increasing the likelihood of multiple spawning events and decreasing the relatedness among individuals in the cohort. Crown Copyright as represented by: The Province of Ontario, 2014 Lake sturgeon nationallicence Genetic nationallicence Number of breeders nationallicence Multiple spawning events nationallicence Welsh Amy Division of Forestry and Natural Resources, West Virginia University, P.O. Box 6125, 26506, Morgantown, WV, USA aut Baerwald Melinda Department of Animal Science, University of California - Davis, 1 Shields Avenue, 95616, Davis, CA, USA aut Friday Michael Ontario Ministry of Natural Resources, 173 25th Side Road, P7K 0B9, Rosslyn, ON, UK aut May Bernie Department of Animal Science, University of California - Davis, 1 Shields Avenue, 95616, Davis, CA, USA aut Environmental Biology of Fishes Springer Netherlands 98/3(2015-03-01), 755-762 0378-1909 98:3<755 2015 98 10641 https://doi.org/10.1007/s10641-014-0309-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-014-0309-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Welsh Amy Division of Forestry and Natural Resources, West Virginia University, P.O. Box 6125, 26506, Morgantown, WV, USA aut NATIONALLICENCE 700 1- Baerwald Melinda Department of Animal Science, University of California - Davis, 1 Shields Avenue, 95616, Davis, CA, USA aut NATIONALLICENCE 700 1- Friday Michael Ontario Ministry of Natural Resources, 173 25th Side Road, P7K 0B9, Rosslyn, ON, UK aut NATIONALLICENCE 700 1- May Bernie Department of Animal Science, University of California - Davis, 1 Shields Avenue, 95616, Davis, CA, USA aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/3(2015-03-01), 755-762 0378-1909 98:3<755 2015 98 10641