Feeding Ecology of the Tidewater Goby
- 1 November 1996
- journal article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 125 (6) , 956-970
- https://doi.org/10.1577/1548-8659(1996)125<0956:feottg>2.3.co;2
Abstract
We investigated the feeding ecology of the tidewater goby Eucyclogobius newberryi, a California estuarine fish that is federally listed as an endangered species. We compared the diet during three seasons (April, August, and November 1992) in three habitats (lagoon, creek, and marsh). Tidewater gobies (N = 331; standard lengths [SL], 15–46 mm) fed on benthic invertebrates, principally ostracods, chironomid larvae, and the gammarid amphipod Corophium spinicorne. Other prey taxa included polychaetes, oligochaetes, isopods, the gammarid amphipod Eogammarus ramellus, copepods, mysids, and invertebrate eggs. Diet variability within samples was low, but diet varied across seasons and sometimes habitats. The tidewater goby appeared to be a specialist that can forage opportunistically in some circumstances. Comparisons between the diet and available resources in August indicated selectivity in the lagoon and marsh (albeit for different prey), but general feeding in the creek. Laboratory observations of fe...Keywords
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