Stream and ocean hydrodynamics mediate partial migration strategies in an amphidromous Hawaiian goby.

ABSTRACT: Partial migration strategies, in which some individuals migrate but others do not, are widely observed in populations of migratory animals. Such patterns could arise via variation in migratory behaviors made by individual animals, via genetic variation in migratory predisposition, or simply by variation in migration opportunities mediated by environmental conditions. Here we use spatiotemporal variation in partial migration across populations of an amphidromous Hawaiian goby to test whether stream or ocean conditions favor completing its life cycle entirely within freshwater streams rather than undergoing an oceanic larval migration. Across 35 watersheds, microchemical analysis of otoliths revealed that most adult Awaous stamineus were freshwater residents (62% of n = 316 in 2009, 83% of n

SUBMITTER: Lisi PJ 

PROVIDER: S-EPMC9788201 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature