Fine scale relationships between sex, life history, and dispersal of masu salmon
Ecology and Evolution
By: Shigeru Kitanishi, Toshiaki Yamamoto, Itsuro Koizumi, Jason B. Dunham, and Seigo Higashi
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Abstract
Identifying the patterns and processes driving dispersal is critical for understanding population structure and dynamics. In many organisms, sex-biased dispersal is related to the type of mating system. Considerably less is known about the influence of life history variability on dispersal. Here we investigated patterns of dispersal in masu salmon (Oncorhynchus masou) to evaluate influences of sex and life history on dispersal. As expected, assignment tests and isolation by distance analysis revealed that dispersal of marine-migratory masu salmon was male-biased. However, dispersal of resident and migratory males did not follow our expectation and marine-migratory individuals dispersed more than residents. This may be because direct competition between marine-migratory and resident males is weak or that the cost of dispersal is smaller for marine-migratory individuals. This study revealed that both sex and migratory life history influence patterns of dispersal at a local scale in masu salmon.
Suggested Citation
Kitanishi, S., Yamamoto, T., Koizumi, I., Dunham, J., Higashi, S., 2012, Fine scale relationships between sex, life history, and dispersal of masu salmon: Ecology and Evolution, v. 2, no. 5, p. 920-929, https://doi.org/10.1002/ece3.228.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Fine scale relationships between sex, life history, and dispersal of masu salmon |
| Series title | Ecology and Evolution |
| DOI | 10.1002/ece3.228 |
| Volume | 2 |
| Issue | 5 |
| Publication Date | April 08, 2012 |
| Year Published | 2012 |
| Language | English |
| Publisher | Wiley |
| Publisher location | Hoboken, NJ |
| Contributing office(s) | Forest and Rangeland Ecosystem Science Center |
| Description | 10 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Ecology and Evolution |
| First page | 920 |
| Last page | 929 |