Boldness and aggressiveness in early and late hatched three-spined sticklebacks Gasterosteus aculeatus.

Abstract excerpt

Levels of boldness and the degree of aggressiveness were compared in juvenile three-spined sticklebacks Gasterosteus aculeatus that had hatched early and late in the breeding season. The most striking result found in this study was that early hatched individuals were bolder when exploring a novel environment than were late-hatched individuals. No differences in levels of aggression between early and late...

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