Sibling-size variation in brown trout Salmo trutta in relation to egg size and stream size.
J Fish Biol
; 74(6): 1259-68, 2009 Apr.
Article
en En
| MEDLINE
| ID: mdl-20735629
Sibling-size variation (SSV), estimated as the coefficient of variation of egg size, was investigated for 13 populations of brown trout Salmo trutta. SSV was negatively correlated with mean egg size both at the population and individual levels. After correction for the effect of mean egg size, SSV was also negatively correlated with stream size. These results provide new information about how salmonid SSV can vary at different ecological scales (individual, population and region). The results are discussed in light of competing theories for explaining SSV: (1) the passive effect hypothesis, stating that egg size variation follows passively from selection on egg size and (2) the bet-hedging hypothesis, stating that high SSV is adaptive in unpredictable environments.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Óvulo
/
Trucha
/
Ríos
/
Tamaño Corporal
Límite:
Animals
Idioma:
En
Revista:
J Fish Biol
Año:
2009
Tipo del documento:
Article
País de afiliación:
Noruega
Pais de publicación:
Reino Unido