Fishing top predators indirectly affects condition and reproduction in a reef-fish community

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Walsh, S. M., Hamilton, S. L., Ruttenberg, B. I., Donovan, M. K., & Sandin, S. A. (2012). Fishing top predators indirectly affects condition and reproduction in a reef-fish community. Journal of Fish Biology, 80(3), 519-537. doi:10.1111/j.1095-8649.2011.03209.x
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TitleFishing top predators indirectly affects condition and reproduction in a reef-fish community
AuthorsS. Walsh, S. Hamilton, B. Ruttenberg, M. Donovan, S. Sandin
AbstractTo examine the indirect effects of fishing on energy allocation in non-target prey species, condition and reproductive potential were measured for five representative species (two-spot red snapper Lutjanus bohar, arc-eye hawkfish Paracirrhites arcatus, blackbar devil Plectroglyphidodon dickii, bicolour chromis Chromis margaritifer and whitecheek surgeonfish Acanthurus nigricans) from three reef-fish communities with different levels of fishing and predator abundance in the northern Line Islands, central Pacific Ocean. Predator abundance differed by five to seven-fold among islands, and despite no clear differences in prey abundance, differences in prey condition and reproductive potential among islands were found. Body condition (mean body mass adjusted for length) was consistently lower at sites with higher predator abundance for three of the four prey species. Mean liver mass (adjusted for total body mass), an indicator of energy reserves, was also lower at sites with higher predator abundance for three of the prey species and the predator. Trends in reproductive potential were less clear. Mean gonad mass (adjusted for total body mass) was high where predator abundance was high for only one of the three species in which it was measured. Evidence of consistently low prey body condition and energy reserves in a diverse suite of species at reefs with high predator abundance suggests that fishing may indirectly affect non-target prey-fish populations through changes in predation and predation risk. © 2012 The Authors. Journal of Fish Biology © 2012 The Fisheries Society of the British Isles.
JournalJournal of Fish Biology
Date2012
Start page519
End page537
ISSN00221112 (ISSN)
Subjectsanimal, article, coral reef, fish, food chain, food industry, gonad, histology, liver, organ size, Pacific islands, physiology, population density, population dynamics, predation, reproduction, Animals, Coral Reefs, Fisheries, Fishes, Gonads, Predatory Behavior, Acanthurus nigricans, Chromis chromis, Chromis margaritifer, Lutjanus bohar, Paracirrhites arcatus, Plectroglyphidodon dickii
NoteCited By (since 1996):1, Export Date: 24 September 2013, Source: Scopus, CODEN: JFIBA

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