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Migratory flexibility in native Hawai'ian amphidromous fishes
Author(s) -
HeimBallew Heidi,
Moody Kristine N.,
Blum Michael J.,
McIntyre Peter B.,
Hogan James D.
Publication year - 2020
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/jfb.14224
Subject(s) - biology , larva , otolith , life history , zoology , ecology , fishery , fish <actinopterygii>
Abstract We assessed the prevalence of life history variation across four of the five native amphidromous Hawai'ian gobioids to determine whether some or all exhibit evidence of partial migration. Analysis of otolith Sr.: Ca concentrations affirmed that all are amphidromous and revealed evidence of partial migration in three of the four species. We found that 25% of Lentipes concolor ( n = 8), 40% of Eleotris sandwicensis ( n = 20) and 29% of Stenogobius hawaiiensis ( n = 24) did not exhibit a migratory life‐history. In contrast, all individuals of Sicyopterus stimpsoni ( n = 55) included in the study went to sea as larvae. Lentipes concolor exhibited the shortest mean larval duration (LD) at 87 days, successively followed by E. sandwicensis (mean LD = 102 days), S. hawaiiensis (mean LD = 114 days) and S. stimpsoni (mean LD = 120 days). These findings offer a fresh perspective on migratory life histories that can help improve efforts to conserve and protect all of these and other at‐risk amphidromous species that are subject to escalating anthropogenic pressures in both freshwater and marine environments.