Voluntary timing of food intake increases weight gain and reduces basal plasma cortisol levels in common carp (Cyprinus carpio L.)

Klaren, Peter H.M.; Dalen, S.C.M. van; Atsma, W.; Spanings, F.A.T.; Hendriks, J.C.M.; Flik, G.

doi:10.1016/j.physbeh.2013.08.020

Cited by 9 publications

(17 citation statements)

References 63 publications

(71 reference statements)

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“…We compared the amounts of ammonia excreted by carp which were fed continuously using an automated feeding system which supplied small portions of food over the whole day (demand‐fed; Klaren et al, . ) or fed once a day (hand‐fed). Ammonium concentrations in tanks with demand‐fed fish were relatively stable during the day (Supporting Information Fig.…”

Section: Resultsmentioning

confidence: 99%

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Branchial nitrogen cycle symbionts can remove ammonia in fish gills

Kessel

Mesman

Arshad

et al. 2016

Environ Microbiol Rep

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Summary Knowledge of the mechanisms by which fish excrete their metabolic nitrogenous waste and insights into nitrogen cycling in aquaculture systems is of utmost importance to improve the sustainable commercial production of fish. In fish, most nitrogenous waste is excreted via the gills as ammonia, a potentially toxic nitrogenous compound. In this study; activity assays, physiological experiments, molecular analysis and microscopy were used to show that the gills of fish harbor a unique combination of hitherto overlooked nitrogen‐cycle microorganisms that can theoretically detoxify excreted ammonia by converting it into inert dinitrogen gas. By doing so, these microorganisms may benefit from the ammonia supply by the host and prevent the build‐up of this compound to toxic concentrations. This novel relationship between vertebrates and microorganisms may shed new light on nitrogen handling by ammonotelic fish species.

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Section: Resultsmentioning

confidence: 99%

Section: Ammonia Excretion By Fishmentioning

confidence: 99%

Branchial nitrogen cycle symbionts can remove ammonia in fish gills

Kessel

Mesman

Arshad

et al. 2016

Environ Microbiol Rep

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“…These effects are consistent with the hypothalamic effects of dopaminergic signalling which together with the resemblances between dopaminergic ascending pathways in the mammalian and teleost brain (Yamamoto et al 2011) suggests the involvement of dopaminergic system in the motivational regulation of feeding in fish. Results from self-feeding experiments carried out in fish can be used to provide information regarding this issue (Geurden et al 2007, Rubio et al 2008, Leal et al 2009, Attia et al 2012, Klaren et al 2013. A recent study (Soares et al 2017) reported that dopamine disruption contributes to shift the attribution of motivational incentive from the predictive cue towards the actual experimental reward, the food.…”

Section: Hedonic Regulationmentioning

confidence: 99%

“…In contrast, in most available studies in teleosts a pre-weighed amount of food is provided to the ambient water and after a period of time is removed and weighed, which cannot be considered truly demand-feeding since access to feed is time limited. Only those studies where fish operate a demand-feeding system (Geurden et al 2007, Rubio et al 2008, Leal et al 2009, Attia et al 2012, Klaren et al 2013 are strictly comparable to those carried out in mammals.…”

Section: Introductionmentioning

confidence: 99%

Central regulation of food intake in fish: an evolutionary perspective

Soengas

Cerdá‐Reverter

Delgado

2018

Journal of Molecular Endocrinology

119

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Evidence indicates that central regulation of food intake is well conserved along the vertebrate lineage, at least between teleost fish and mammals. However, several differences arise in the comparison between both groups. In this review, we describe similarities and differences between teleost fish and mammals on an evolutionary perspective. We focussed on the existing knowledge of specific fish features conditioning food intake, anatomical homologies and analogies between both groups as well as the main signalling pathways of neuroendocrine and metabolic nature involved in the homeostatic and hedonic central regulation of food intake.

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“…active during the dark phase and resting during the light phase of the day. Thus, the feeding moment during the day needs consideration in relation to growth efficiency, as shown before for several fish species (Hogendoorn 1981;Sundararaj, Nath & Halberg 1982;Noeske-Hallin, Spieler, Parker & Suttle 1985;Baras, Tissier, Westerloppe, M elard & Philippart 1998;Sanchez, Lopez-Olmeda, Blanco-Vives & Sanchez-Vazquez 2009;L opez-Olmeda, Noble & Sanchez-Vazquez 2012;Klaren, van Dalen, Atsma, Spanings, Hendriks & Flik 2013). Juveniles and young catfish have a preference for shallow waters with many shelter possibilities (Bruton 1979;van der Waal 1998) to escape predators or larger conspecifics.…”

Section: Introductionmentioning

confidence: 99%

Effects of density, PVC-tubes and feeding time on growth, stress and aggression in African catfish (Clarias gariepinus)

et al. 2015

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Successive exposure to aquaculture‐related stressors may compromise the allostatic capacity of African catfish and lead to allostatic overload and poor welfare. Therefore, we tested the effect of (i) feeding during the light or dark phase, (ii) density (51 fish per 140 L versus 51 fish per 43 L) and (iii) altered available resting space/shelter on stress handling were studied in African catfish (Clarias gariepinus). Available resting space/shelter was manipulated by providing PVC‐tubes in the tanks. Growth, baseline stress load (cortisol and osmolality), metabolism (glucose, lactate and non‐esterified fatty acids) and aggression (measured by skin scar incidence) were assessed. Upon completion of the experimental period, we determined the adaptive capacity of the fish by the response to air exposure. We show that night‐feeding enhances growth and lowers feed conversion ratio compared to day‐feeding. No effects of density were found for baseline stress hormones, basal metabolism or aggression. Low density seems to stimulate aggressive behaviour after air exposure. Unexpectedly, providing PVC‐tubes under high‐density conditions increased aggression, raised baseline cortisol levels and decreased basal metabolism as well as growth; also the endocrine response to air exposure was stronger. We argue that these effects relate to a reduction in available space, i.e. a further increase in density, or to an increased competition for shelter. Overall, our data suggest that night‐feeding optimizes growth and that care should be taken in using objects as shelter/enrichment for African catfish.

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Voluntary timing of food intake increases weight gain and reduces basal plasma cortisol levels in common carp (Cyprinus carpio L.)

Cited by 9 publications

References 63 publications

Branchial nitrogen cycle symbionts can remove ammonia in fish gills

Branchial nitrogen cycle symbionts can remove ammonia in fish gills

Central regulation of food intake in fish: an evolutionary perspective

Effects of density, PVC-tubes and feeding time on growth, stress and aggression in African catfish (Clarias gariepinus)

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