Laboratory Methods in Fish Feeding and Nutritional Studies

Talbot, C.

doi:10.1007/978-94-011-7918-8_5

Cited by 71 publications

(81 citation statements)

References 98 publications

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“…compared to in round 1a. In the low temperatures (8)(9)(10)(11)(12)(13) o C), growth was also significantly higher (SGR and TGC) in round 2b than in round 2a while feed intake was unaffected by experimental round ( Table 3).…”

Section: Discussionmentioning

confidence: 99%

“…The energy requirements of fish has traditionally been estimated by constructing complete energy budgets, balancing energy intake against energy expenditures such as faecal production, nitrogen excretion, metabolism and growth [3][4][5][6]. Despite improvements in methodology, this approach is often associated with several potential sources of error [4,5,7,8] and many of the developed energy budgets prove to deliver inaccurate results when tested [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Growth and Energy Expenditures of Eurasian Perch Perca fluviatilis (Linnaeus) in Different Temperatures and of Different Body Sizes

Strand¹,

Magnhagen²,

Alanärä³

2011

J Aquac Res Development

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Growth and Energy Expenditures of Eurasian Perch Perca fluviatilis (Linnaeus) in Different Temperatures and of Different Body Sizes

Strand¹,

Magnhagen²,

Alanärä³

2011

J Aquac Res Development

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“…The use of radio-opaque markers in feed has been shown to be an accurate way of assessing individual food consumption in fish (Talbot 1985). In a social hierarchy, dominant fish consume a greater proportion of the daily meal (Fausch 1984) and, once the dominance hierarchy is established, available evidence suggests that it tends to be stable (Jenkins 1969, Bachmann 1984, Abbott & Dill 1985.…”

Section: Discussionmentioning

confidence: 99%

Changes in physiological parameters and feeding behaviour of Atlantic salmon Salmo salar infected with sea lice Lepeophtheirus salmonis

Dawson

Pike²,

Houlihan³

et al. 1999

Dis. Aquat. Org.

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ABSTRACT. Atlantic salmon Salmo salar L. artificially infected with salmon lice Lepeophtheirus salmonis (Krpryer 1837) recovered from detrimental physiological changes and skin damage induced by preadult lice as the parasites matured. Growth rates of Atlantic salmon remained unaffected by lice infection, but food consumption decreased wlth increasing feeding and movement of the lice prior to and post-mating, correlating with the appearance of head erosions and detr~mental changes in physiological integrity. Food consumption of the fish increased as the lice moulted to the adult stage and gravid female lice settled in a posterior location on the fish, subsequently reducing the impact of infection and allowing recovery of the skin damage. However, the impact of preadults was limited, as the decrease in food consumption of fish at 21 d post-infection had no effect on either the specific growth rate or condition factor of the flsh. Furthermore, the intensity of lice infections at each of the sample days was not correlated with food consumption, specific growth rate or any of the haematological or physiological parameters measured, either before or after infection, indicating that lice intensity was independent of social dorninance/subordinance. This work has provided the first evidence that infected fish can recover from the detrimental changes caused by lice infection, even when they are still infected with lice. If fish can survive the preadult stage of lice, then the mortal impact of lice infections is greatly reduced.

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“…These techniques permitted repeated measurements of food consumption rates of fish held in groups without any alteration to the feeding regimen. However, for health and safety reasons X-radiography has been the preferred technique (for review, see Talbot, 1985). …”

mentioning

confidence: 99%

Variation in individual food consumption rates of fish and its implications for the study of fish nutrition and physiology

et al. 1993

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The aim of the present paper is to review recent information on food consumption rates of individual fish and to explore the ways in which values for individual food consumption can be used in studies of fish behaviour, nutrition and physiology. There are two main ways of carrying out nutritional studies in fish in which the aim is to investigate how the amount or the composition of the diet influences growth rate. One involves feeding tanks of animals and measuring the growth rates of the groups. This method stresses the importance of the group response to dietary manipulation and the ground rules for carrying out such studies have recently been clearly expounded (Cho, 1992;Cowey, 1992). An alternative method is to measure the food consumption of the individual fish and to construct from the data on individual animals food consumptiongrowth rate relationships for the species. In some species of fish which can be held and fed individually, e.g. cod (Gadus morhua L.; Houlihan et al. 1989) or minnow (Phoxinus phoxinus L.; Cui & Wootton, 1989), there is not a problem in determining food consumption and growth rate relationships. However, in fish feeding in groups a major problem has been to develop a reliable method to make repeated measurements of an individual's food consumption. Early attempts involved direct observations of feeding activity or the examination of gut contents in order to estimate consumption. These techniques have proved unsatisfactory, as the methodologies involved are timeconsuming, stressful or invasive and periods of pre-or postprandial starvation were necessary (for review, see Talbot, 1985). In the 1980s, two non-invasive methods were developed to measure consumption rates of individual fish, held in groups, which employed either feed labelled with the radioisotope I3lI (Storebakken et al. 1981) or with an X-ray opaque particulate marker (Talbot & Higgins, 1983). These techniques permitted repeated measurements of food consumption rates of fish held in groups without any alteration to the feeding regimen. However, for health and safety reasons X-radiography has been the preferred technique (for review, see Talbot, 1985). T H E USE OF RADIOGRAPHY T O MEASURE INDIVIDUAL CONSUMPTION RATES OF FISHA number of studies have reported on food consumption rates of individual fish in groups using X-radiography (Jobling et al.

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Laboratory Methods in Fish Feeding and Nutritional Studies

Cited by 71 publications

References 98 publications

Growth and Energy Expenditures of Eurasian Perch Perca fluviatilis (Linnaeus) in Different Temperatures and of Different Body Sizes

Growth and Energy Expenditures of Eurasian Perch Perca fluviatilis (Linnaeus) in Different Temperatures and of Different Body Sizes

Changes in physiological parameters and feeding behaviour of Atlantic salmon Salmo salar infected with sea lice Lepeophtheirus salmonis

Variation in individual food consumption rates of fish and its implications for the study of fish nutrition and physiology

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