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Temperature-related changes in species composition of juvenile finfish on a rock reef in Long Island Sound
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2020
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Source: Fishery Bulletin, 118
[PDF-1.02 MB]
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Journal Title:Fishery Bulletin
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Description:We assessed changes in relative abundance of juvenile fish on a natural cobble and boulder reef near
Milford, Connecticut, in summer (June–August) during the years 2004–2008 and in 2016. Fish traps, used to sample
structure-oriented fish, were soaked for~24 h 2–3 times per week. Catch per unit of effort was used as an index of
fish abundance and to standardize differences in sampling effort among study years. Juvenile finfish assemblages
during 2004 and 2005 differed most in species composition from the assemblage in 2016. Abundance of 2 warmadapted species, the black sea bass
(Centropristis striata) and the oyster toadfish (Opsanus tau), was observed to increase over the study period, and numbers of cunner (Tautogolabrus adspersus) and other cold-adapted species declined. Water temperature was a statistically significant predictor of changes in finfish assemblage over the
period of this study, explaining 8.6% of the observed variation in species composition in the data set. A widely documented trend of gradually warming
water temperatures from a local, longterm temperature record was consistent with observations from this study of warm-adapted and cold-adapted fish species on a natural rock reef in Long Island Sound
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Source:Fishery Bulletin, 118
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Rights Information:CC BY
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