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The digestibility of four ingredients in rainbow trout (Oncorhynchus mykiss Walbaum) diets

Published online by Cambridge University Press:  05 November 2021

R.N. Weatherup ,
K.J. McCracken ,
D.A. Rice ,
J. McKendry  and
R. Hoey
R.N. Weatherup
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, Northern Ireland
K.J. McCracken
Affiliation:
Department of Agriculture for Northern Ireland, Newforge Lane, Belfast BT9 5PX, Northern Ireland
D.A. Rice
Affiliation:
Nutrition Services International, 211 Castle Road, Randalstown, Co Antrim BT42 2EB, Northern Ireland
J. McKendry
Affiliation:
Nutrition Services International, 211 Castle Road, Randalstown, Co Antrim BT42 2EB, Northern Ireland
R. Hoey
Affiliation:
R. Hoey & Sons Ltd, 212 Moorfields Road, Kells, Co Antrim BT42 3EG, Northern Ireland
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Extract

The marker technique has been used widely in trout digestibility studies due to practical difficulties in obtaining “true” faeces samples directly from fish. However this technique is also relatively difficult and there are few good systems for faeces collection. Reliable data on raw material digestibilities are therefore scarce. Traditionally, chromic oxide has been used as a marker. However this substance can give rise to skin allergies in humans and has been implicated as a carcinogen. Jagger et al., (1992) suggested that titanium dioxide could be used successfully as a digestibility marker in pig diets. The present study was designed to determine the digestibility of four feed ingredients for trout (prairie meal, maize distillers, soya 50 and extruded wheat) and to evaluate the use of chromic oxide or titanium dioxide as a digestibility marker in fish diets.

Each test ingredient was included in a basal diet at 0, 100, 200, 300 and 400 g/kg. Titanium dioxide and chromic oxide were included in the basal diet at 1 and 3.7 g/kg respectively.

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Information
Proceedings of the British Society of Animal Science , Volume 1998 , 1998 , pp. 135
Copyright
Copyright © The British Society of Animal Science 1998

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References

Choubert, G., De La Noüe, J. and Luquet, P. 1982. Digestibility in fish: improved device for the automatic collection of faeces. Aquaculture, 29: 185–189.10.1016/0044-8486(82)90048-5CrossRefGoogle Scholar
Hajen, W.E., Higgs, D.A., Beames, R.M. and Dosanjh, B.S. 1993. Digestibility of various feedstuffs by post-juvenile chinook salmon (Oncorhynchus tshawytscha) in sea water. 2. Measurement of digestibility. Aquaculture, 112, 333–348.10.1016/0044-8486(93)90394-ECrossRefGoogle Scholar
Jagger, S., Wiseman, J., Cole, D.J.A. and Craigon, J. 1992. Evaluation of inert markers for the determination of ileal and faecal apparent digestibility values in the pig. British Journal of Nutrition, 68: 729–739.10.1079/BJN19920129CrossRefGoogle Scholar
Maynard, L.A. and Loosli, J.K. 1969. Animal Nutrition, 6th Edition. McGraw-Hill, New York.Google Scholar