Rapid Evolution of Egg Size in Captive Salmon
| Autor: | Charles W. Fox, Rachel M Johnson, Colleen A Bryden, John W. Heath, Daniel D. Heath |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Conservation of Natural Resources
Fisheries Zoology Captivity Marine Biology Breeding Environment Biology Salmon Captive breeding Animals Juvenile Selection Genetic Biochemistry Biophysics and Structural Biology Salmonidae Ovum Multidisciplinary Natural selection Body Weight Life Sciences Biodiversity biology.organism_classification Biological Evolution Hatchery Fertility Body Constitution Fecundity selection Female Adaptation |
| Zdroj: | Great Lakes Institute for Environmental Research Publications |
| ISSN: | 1095-9203 0036-8075 |
| DOI: | 10.1126/science.1079707 |
| Popis: | Captive breeding and release programs, widely used to supplement populations of declining species, minimize juvenile mortality to achieve rapid population growth. However, raising animals in benign environments may promote traits that are adaptive in captivity but maladaptive in nature. In chinook salmon, hatchery rearing relaxes natural selection favoring large eggs, allowing fecundity selection to drive exceptionally rapid evolution of small eggs. Trends toward small eggs are also evident in natural populations heavily supplemented by hatcheries, but not in minimally supplemented populations. Unintentional selection in captivity can lead to rapid changes in critical life-history traits that may reduce the success of supplementation or reintroduction programs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|