Theoretical analysis of introgression between released fish and wild fish populations considering sex differences.

• KANAIWA MINORU

  Faculty of Bioresources, Mie University

• HARADA YASUSHI

  Faculty of Bioresources, Mie University

Abstract

The genetic effects of hatchery release on natural populations were studied using simple mathematical models. We focused on the effect of sex differences in the number of released fish, the contribution to natural reproduction of released fish and/or in the fitness of released fish. A method for reducing introgression is discussed and we showed that the former two factors may reduce introgression, although the most effective bias for reduction depends on stocking density and fitness. We also showed that the dynamics can have multiple stable equilibria, which may result in irreversible introgression due to high stocking density in a single year.

Journal

• Fisheries science

  Fisheries science 66 (4), 686-694, 2000

  The Japanese Society of Fisheries Science

Keywords

• introgression
• sex difference
• stocking
• theoretical analysis

Details

• CRID: 1390282679405014784
• NII Article ID: 130003903479
• NII Article ID: 10004859428
• NII Book ID: AA10993718
• DOI: 10.1046/j.1444-2906.2000.00109.x
• ISSN: 14442906
• ISSN: 09199268
• NDL BIB ID: 5501143
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5501143
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed