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Trophic niche and spatio-temporal changes in the feeding ecology of two sympatric species of coral trout (Plectropomus leopardus and P-laevis)

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dc.contributor Australian Institute Of Marine Science
dc.contributor Coll Sci & Engn
dc.contributor University Of Windsor
dc.contributor James Cook Univ
dc.contributor James Cook University
dc.contributor Great Lakes Inst Environm Res
dc.contributor Australian Inst Marine Sci
dc.contributor Ctr Sustainable Trop Fisheries & Aquaculture
dc.contributor Univ Windsor HEUPEL, M. R. MATLEY, J. K. TOBIN, A. J. SIMPFENDORFER, C. A. FISK, A. T. 2017-04-06T04:57:50Z 2017-04-06T04:57:50Z 2020-09-02T04:12:10Z 2017-04-06T04:57:50Z 2017-04-06T04:57:50Z 2020-09-02T04:12:10Z 2017-01-20
dc.identifier.citation Matley JK, Tobin AJ, Simpfendorfer CA, Fisk AT, Heupel MR (2017) Trophic niche and spatio-temporal changes in the feeding ecology of two sympatric species of coral trout (Plectropomus leopardus and P-laevis). Marine Ecology Progress Series 563: 197-210
dc.identifier.issn 0171-8630
dc.description.abstract Prey selection can influence interactions among species, the composition and abundance of prey, and ultimately the movement of energy within the ecosystem. Different species of the exploited coral trout Plectropomus spp. often co-occur in reef environments, but their foraging behaviour and ecological niches are largely unknown. To explore niche overlap and resource use of sympatric adult coral trout, stable isotopes (delta C-13 and delta N-15) were quantified for 3 tissues (muscle, red blood cells, and plasma) collected between August 2013 and February 2014 from P. leopardus (n = 117) and P. laevis (n = 36) at 4 reefs in eastern Australia. Bayesian standard ellipses were used to show that prey selection of P. leopardus varied considerably from P. laevis, particularly from P. laevis in the blue-spot colour phase. Size of adult individuals had little influence on d13C and d15N values for P. leopardus and both footballer and blue-spot colour phases of P. laevis. Spatiotemporal comparisons of P. leopardus trophic positions, made by adjusting baseline algae and planktonic d15N at each reef and sampling period, demonstrated that trophic positions varied in time and space, and warrants further investigation. This study highlights that sympatric species of coral trout have distinct ecological roles and will likely react differently to environmental disturbances and/or changes in habitat or prey composition.
dc.description.sponsorship This research was conducted under research permits from the Great Barrier Reef Marine Park Authority (G12/35236.1 and G14/36624.1) and Queensland Department of Primary Industries and Fisheries (144482). This project was funded by the Australian Government's National Environmental Research Program (Tropical Ecosystems Hub Project 6.1). M.R.H. was supported by an Australian Research Council Future Fellowship (#FT100101004). Additional funding was granted to J.K.M. from the James Cook University College of Marine and Environmental Sciences and the Graduate Research School; an Australian Coral Reef Society (ACRS) Award and a Natural Sciences and Engineering Research Council (NSERC) PGS D scholarship. All research was conducted under JCU Animal Ethics Permit A1933. Laboratory analysis was assisted by A. Hussey and K. Johnson. The authors thank crew from the R/V 'James Kirby', F. de Faria, S. Moore, P. Yates, M. Espinoza, and E. Ledee.
dc.language English
dc.subject Stable-isotope Ratios
dc.subject Ecology
dc.subject Fisheries
dc.subject Reef Fishes
dc.subject Stable Isotopes
dc.subject Diet
dc.subject Environmental Sciences & Ecology
dc.subject Trophic Position
dc.subject Nitrogen
dc.subject Temporal Variation
dc.subject Niche Partitioning
dc.subject Communities
dc.subject Marine & Freshwater Biology
dc.subject Oceanography
dc.subject Resource Use
dc.subject Serranidae
dc.subject Competition
dc.subject Carbon
dc.subject Foraging
dc.subject Interspecific Competition
dc.title Trophic niche and spatio-temporal changes in the feeding ecology of two sympatric species of coral trout (Plectropomus leopardus and P-laevis)
dc.type journal article
dc.identifier.doi 10.3354/meps11971
dc.identifier.wos WOS:000395424200015

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