Large inter-stock differences in catch size-at-age of mature Atlantic salmon observed by using genetic individual origin assignment from catch data

Autor: Michele Masuda, Irma Kallio-Nyberg, Jarmo Koskiniemi, Irma Saloniemi, Marja-Liisa Koljonen
Přispěvatelé: Department of Agricultural Sciences
Jazyk: angličtina
Rok vydání: 2021
Předmět:
0106 biological sciences
Baltic States
Male
Marine and Aquatic Sciences
Social Sciences
01 natural sciences
Salmon
Psychology
Body Size
Marine Fish
Salmo
Multidisciplinary
Animal Behavior
1184 Genetics
developmental biology
physiology
Eukaryota
Freshwater Fish
Osteichthyes
Vertebrates
Freshwater fish
Same sex
Fish
Medicine
Female
Seasons
Research Article
Freshwater Environments
Baltic Sea
Science
Oceans and Seas
Salmo salar
Marine Biology
Biology
Genetic stock
010603 evolutionary biology
Rivers
Genetics
Animals
14. Life underwater
Stock (geology)
Smoltification
Behavior
010604 marine biology & hydrobiology
Ecology and Environmental Sciences
Organisms
Biology and Life Sciences
Aquatic Environments
Bodies of Water
biology.organism_classification
Fishery
Fish
Baltic sea
Earth Sciences
Animal Migration
Zoology
Microsatellite Repeats
Zdroj: PLoS ONE
PLoS ONE, Vol 16, Iss 4, p e0247435 (2021)
ISSN: 1932-6203
Popis: Genetic individual assignment of river stock of origin of mixed stock catch fish offers a tool to analyze size differences among river stocks. Data on the genetically identified river stock of origin of individual fish from commercial mixed stock catches were used to compare the catch size-at-age of mature Atlantic salmon catch fish (Salmo salar) from different rivers in the Baltic Sea. In this application of genetic mixed stock modeling, individual assignments of the river stock of origin were analyzed together with length- and weight-at-age data for individual catch fish. The use of four genetic stock identification based methods was compared for defining the length distributions of caught mature salmon in different river stocks. The catch data included information on maturing salmon in the northern Baltic Sea over the years 2000–2013. DNA microsatellite data on 17 loci and information on the smoltification age were used to assign spawners to their stock of origin. All of the compared methods for using probabilistic stock of origin data in our case yielded very similar estimates of the final mean length distributions of the stocks. The Bayesian mixture model yielded slightly more conservative estimates than the direct probability method, threshold method, or the modified probability method. The catch size between spawners of a same sex and age from river stocks differed significantly and the differences were large. The mean catch weight of 1-sea-winter old mature males in different rivers varied from 1.9 kg to 2.9 kg, from 5.1 kg to 7.5 kg for 2-sea-winter old males, from 5.0 kg to 7.2 kg for 2-sea-winter old females, and from 8.2 kg to 10.8 kg for 3-sea-winter-old females. The mean size of caught wild salmon spawners in each year-class was on average smaller than that of the hatchery-reared and sea ranched stocks.
Databáze: OpenAIRE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje