The effect of feeding regime on growth, locomotor activity pattern and the development of food anticipatory activity in greenback flounder

Chen, Weimin; Purser, GJ

doi:10.1111/j.1095-8649.2001.tb00506.x

Cited by 25 publications

(7 citation statements)

References 46 publications

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“…Thus, the weight reduction (energy deficit) was not essential for the expression of FAA in greenback flounder although meal size affected the magnitude and duration of FAA. This is consistent with results in rats (Mistlberger & Rusak, 1987;Stephan & Becker, 1989;Persons et al, 1993) and our previous observations (Chen & Purser, 2000).…”

Section: Discussionsupporting

confidence: 94%

“…Activity of flounder was recorded as in Chen & Purser (2000). Observations were made at intervals of 15 min during the 12 h photophase on days 11,17,21,24,28,30,32,37 and 39, and within the interval of 15 min during 0700-0730 hours (after the onset of light) and 0915-0945 hours (the onset of a rapid increase in activity in some groups) to record the rapid change in activity more accurately during these times.…”

Section: Phase Amentioning

confidence: 99%

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The effect of meal size and meal duration on food anticipatory activity in greenback flounder

Purser¹

2001

Journal of Fish Biology

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Latency of food anticipatory activity (FAA) in greenback flounder Rhombosolea tapirina was about 21 days. Fish fed at meal sizes of 0·25 and 0·5% W day 1 exhibited FAA under meal durations of 1, 3 and 7 h. Fish fed at 1·5% W day 1 showed FAA only at a meal duration of 1 h. At each meal size, FAA was shorter and lower the longer the duration of the meal. The mean durations of FAA and post-feeding activity were correlated positively (r=0·87; P<0·01; n=7). FAA persisted for <3 days during food deprivation. It is suggested that greenback flounder was capable of evaluating the energetic and temporal impacts of a single daily meal. 2001 The Fisheries Society of the British Isles

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Section: Discussionsupporting

confidence: 94%

Section: Phase Amentioning

confidence: 99%

The effect of meal size and meal duration on food anticipatory activity in greenback flounder

Purser¹

2001

Journal of Fish Biology

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“…The carapace colour data were evaluated using the Kruskal±Wallis non-parametric test for rank data. Activity patterns in each of the treatments were compared visually (Chen & Purser 2001). Activity rates in the dark and light periods of the three treatments that had light:dark regimes (6L:18D; 12L:12D; 18L:6D) were compared by t-test (dependent samples).…”

Section: Methodsmentioning

confidence: 99%

The effect of photoperiod on growth, survival, colour and activity of juvenile southern rock lobster, Jasus edwardsii

Crear

Hart

Thomas

2003

Aquaculture Research

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Juvenile (1–10 g) southern rock lobsters, Jasus edwardsii, were subjected to five photoperiods [0L(light):24D(dark); 6L:18D; 12L:12D; 18L:6D; 24L:0D] during a 112‐day trial, and growth, survival, colour, food consumption and activity were examined. Lobsters grown under the 6L:18D and 24L:0D photoperiods had significantly lower (P < 0.05) final mean weight and specific growth rate than any other treatments. Photoperiod had no effect on survival or colour of lobsters. Food consumption differed significantly during the first week of the trial; after 5 weeks, food consumption was similar in all treatments. Major peaks in activity occurred during dark periods for lobsters exposed to photoperiods that had a light:dark regime. Activity of lobsters exposed to continuous light or dark regimes remained constant and at low levels during the 24‐h period. Food consumption or activity does not appear to determine the rate of growth of lobsters in the different photoregimes. One over‐riding outcome of this and other studies on photoperiod is that the growth and survival response of juvenile J. edwardsii was not significantly better than those of the standard 12L:12D cycle.

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“…A common indicator of good health and coping ability is the anticipatory response of the fish to feeding and sounds or signals associated with feeding. In aquaculture cages and tanks, this can be shown as a high concentration of fish near the feeding area and increased schooling activity (Juell et al 1994 , Chen and Purser 2001 ). A good feed anticipatory response and feed intake can be signs of high feeding motivation and unstressed fish (Fernö et al 1995 , 2006 ; Folkedal 2010 ).…”

Section: Behavioural Welfare Indicatorsmentioning

confidence: 99%

Behavioural indicators of welfare in farmed fish

Martins

Galhardo

Noble

et al. 2011

Fish Physiol Biochem

326

186

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Behaviour represents a reaction to the environment as fish perceive it and is therefore a key element of fish welfare. This review summarises the main findings on how behavioural changes have been used to assess welfare in farmed fish, using both functional and feeling-based approaches. Changes in foraging behaviour, ventilatory activity, aggression, individual and group swimming behaviour, stereotypic and abnormal behaviour have been linked with acute and chronic stressors in aquaculture and can therefore be regarded as likely indicators of poor welfare. On the contrary, measurements of exploratory behaviour, feed anticipatory activity and reward-related operant behaviour are beginning to be considered as indicators of positive emotions and welfare in fish. Despite the lack of scientific agreement about the existence of sentience in fish, the possibility that they are capable of both positive and negative emotions may contribute to the development of new strategies (e.g. environmental enrichment) to promote good welfare. Numerous studies that use behavioural indicators of welfare show that behavioural changes can be interpreted as either good or poor welfare depending on the fish species. It is therefore essential to understand the species-specific biology before drawing any conclusions in relation to welfare. In addition, different individuals within the same species may exhibit divergent coping strategies towards stressors, and what is tolerated by some individuals may be detrimental to others. Therefore, the assessment of welfare in a few individuals may not represent the average welfare of a group and vice versa. This underlines the need to develop on-farm, operational behavioural welfare indicators that can be easily used to assess not only the individual welfare but also the welfare of the whole group (e.g. spatial distribution). With the ongoing development of video technology and image processing, the on-farm surveillance of behaviour may in the near future represent a low-cost, noninvasive tool to assess the welfare of farmed fish.

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The effect of feeding regime on growth, locomotor activity pattern and the development of food anticipatory activity in greenback flounder

Cited by 25 publications

References 46 publications

The effect of meal size and meal duration on food anticipatory activity in greenback flounder

The effect of meal size and meal duration on food anticipatory activity in greenback flounder

The effect of photoperiod on growth, survival, colour and activity of juvenile southern rock lobster, Jasus edwardsii

Behavioural indicators of welfare in farmed fish

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