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Volume 1 (Issue #3), 1993 X-RADIOGRAPHY IN FEEDING AND GROWTH STUDIES
<br />The method of Talbot and Higgins does, however, have many applications in
<br />studies where accurate estimations of feed intake are required. Because the method
<br />is noninvasive and allows repeated sampling of individual and groups of fish, it would
<br />appear to have particular application in experiments designed to investigate the effects
<br />of various biotic and abiotic factors on feed-growth relationships and energy partition-
<br />ing (Jobling et al., 1989; Christiansen et al., 1992, Jorgensen et al., 1993).
<br />ACKNOWLEDGMENTS
<br />The support of the Norwegian Council of Fisheries Research (NFFR Project Nos. V
<br />403.088 and V 500.016) is gratefully acknowledged.
<br />REFERENCES
<br />Alanara, A. Demand feeding as aself-regulating feeding system for rainbow trout (Oncorhynchus
<br />mykiss) in net-pens. Aquaculture, 108:347-356 (1992a).
<br />Alanara, A. The effect of time-restricted demand feeding on feeding activity, growth and feed
<br />conversion in rainbow trout (Oncorhynchus mykiss). Aquaculture, 108:357-368 (1992b).
<br />Amesen, A. M., E. H. Jorgensen, and M. Jobling. Feed intake, growth and osmoregulation in
<br />Arctic chary, Salvelinus alpinus (L.), following abrupt transfer from freshwater to more
<br />saline water. Aquaculture, (1993).
<br />Beamish, F. W. H. Swimming capacity. In: Fish Physiology, Vol. VII. pp. 101-187 (Hoar, W. S.
<br />and D. J. Randall, Eds.). London: Academic Press (1978).
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<br />Fishes, 35:109-131 (1992).
<br />Boujard, T., X. Dugy, D. Genner, C. Gosset, and G. Grig. Description of a modular, low cost,
<br />eater meter for the study of feeding behavior and food preferences in fish. Physiol.
<br />Behav., 52:1101-1106 (1992).
<br />Brett, J. R. The respiratory metabolism and swimming performance of young sockeye salmon.
<br />J. Fish. Res. Board Can., 21:1183-1226 (1964).
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<br />performance. J. Fish. Res. Board Can., 30:1799-1809 (1973).
<br />Brett, J. R. and T. D. D. Groves. Physiological energetics. )(n: Fish Physiology, Vol. VIII. pp.
<br />279-352 (Hoar, W. S., D. J. Randall, and J. R. Brett, Eds.). London: Academic Press (1979).
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<br />in relation to swimming speed. J. Fish. Res. Board Can., 22:405-409 (1965).
<br />Carter, C. G., D. F. Houlihan, I. D. McCarthy, and A. E. Brafield. Variation in the food intake
<br />of grass carp, Ctenopharyngodon idella (Val.), fed singly or in groups. Aquat. Living Res.,
<br />5:225-228 (1992).
<br />Christiansen, J. S. and M. Jobling. The behaviour and the relationship between food intake
<br />and growth of juvenile Arctic chary, Salvelinus alpinus L., subjected to sustained exercise.
<br />Can. J. Zool., 68:2185-2191 (1990).
<br />Christiansen, J. S., E. H. Jmrgensen, and M, Jobling. Oxygen consumption in relation to
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<br />260:149-156 (1991).
<br />Christiansen, J. S., E. Ring, and M. Jobling. Effects of sustained exercise on growth and body
<br />composition of first-feeding fry of Arctic chary, Salvelinus alpinus (L.). Aquaculture,
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