Effect of feeding regime and fish size on weight gain, feed intake and gastric evacuation in juvenile Australian snapper Pagrus auratus

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dc.contributor.author Booth, Mark en_US
dc.contributor.author Tucker, Bradley en_US
dc.contributor.author Allan, G en_US
dc.contributor.author Fielder, D en_US
dc.contributor.editor en_US
dc.date.accessioned 2012-02-02T08:49:58Z
dc.date.available 2012-02-02T08:49:58Z
dc.date.issued 2008 en_US
dc.identifier 2008004110 en_US
dc.identifier.citation Booth Mark et al. 2008, 'Effect of feeding regime and fish size on weight gain, feed intake and gastric evacuation in juvenile Australian snapper Pagrus auratus', Elsevier Science Bv, vol. 282, no. 1-4, pp. 104-110. en_US
dc.identifier.issn 0044-8486 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/15043
dc.description.abstract We investigated the interactive effects of nine feeding regimes (1 feeding early, 1 feeding late, 2 feedings early, 2 feedings late, 4 feedings, 4 feedings early, 4 feedings late, 6 feedings or 8 feedings per day: hereafter IFE, 1FL, 2FE, 2FL, 4F, 4FE, 4FL, 6F or 817, respectively) and two fish sizes (small approximate to 5 g or large approximate to 20 g) on the harvest weight, feed intake and feed conversion ratio (FCR) of juvenile Australian snapper reared under an 18 L:6D photoperiod at a temperature of 23 degrees C for 42 days. At the completion of the feeding study, small or large fish which had been accustomed to 1FE or 1FL were sacrificed to model gastric evacuation of a single meal, The feeding study indicated that optimum to maximum weight gain and FCR in juvenile snapper can be achieved by feeding fish to apparent satiation twice per day. This regime equated to relative feed intakes of 36 or 47 g kg BW-1 day(-1) for large or small snapper, respectively. In addition, there were no improvements in weight gain as a consequence of feeding a similar number of feeds (i.e. once, twice OF four times) earlier in the day as opposed to later in the day. Size heterogeneity in both groups of snapper measured as the coefficient of variation in harvest weight (CVhw), was not affected by feeding regime, but smaller snapper recorded slightly higher CVhw (0.14) than larger juveniles (0.11). The gastric evacuation rates (GER) of small or large snapper fed a single meal proved to be similar (relative feed content(Combined) = 2.733 +/- 0.195 x exp((-0.139 +/- 0.013)); R-2 = 0.72), with approximately half the meal passed within 5 h and the whole meal cleared from the stomach within 16-20 h. This information will help operators of snapper hatcheries/nurseries plan their feeding regimes and assist with benchmarking performance. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved. en_US
dc.language en_US
dc.publisher Elsevier Science Bv en_US
dc.relation.isbasedon http://dx.doi.org/10.1016/j.aquaculture.2008.06.027 en_US
dc.title Effect of feeding regime and fish size on weight gain, feed intake and gastric evacuation in juvenile Australian snapper Pagrus auratus en_US
dc.parent Aquaculture en_US
dc.journal.volume 282 en_US
dc.journal.number 1-4 en_US
dc.publocation Amsterdam en_US
dc.identifier.startpage 104 en_US
dc.identifier.endpage 110 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 070400 en_US
dc.personcode 0000027881 en_US
dc.personcode 0000029740 en_US
dc.personcode 0000049744 en_US
dc.personcode 0000027883 en_US
dc.percentage 100 en_US
dc.classification.name Fisheries Sciences en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity ISI:000260292000016 en_US
dc.description.keywords en_US
utslib.copyright.status Closed Access
utslib.copyright.date 2015-04-15 12:17:09.805752+10
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