Circadian self‐feeding rhythms in greater amberjack <i>Seriola dumerili</i> (Risso)

Chen, W.‐M.; Umeda, Naoko; Mitsuboshi, Toru; Hirazawa, Noritaka

doi:10.1111/j.1095-8649.2007.01316.x

Cited by 6 publications

(5 citation statements)

References 41 publications

(65 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other species or experimental settings may show very different parameter values and learning times, but the temporal development of action frequency will in all cases be a complex function of not only learning, but also curiosity and its attenuation, acquainted triggering activity and time varying motivation for action (Chen et al, 2007;Millot and Bégout, 2009). Therefore, inferring learning from the temporal development in triggering frequency in experimental situations comprising solely of rewarded fish (e.g.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Exploration and learning of demand-feeding in Atlantic cod (Gadus morhua)

Nilsson

Torgersen

2010

Aquaculture

View full text Add to dashboard Cite

Havforskningsinstituttets institusjonelle arkiv Brage IMR - Institutional repository of the Institute of Marine Research b r a g e i m rDette er forfatters siste versjon av den fagfellevurderte artikkelen, vanligvis omtalt som postprint. I Brage IMR er denne artikkelen ikke publisert med forlagets layout fordi forlaget ikke tillater dette. Du finner lenke til forlagets versjon i Brage-posten. Det anbefales at referanser til artikkelen hentes fra forlagets side. Ved lenking til artikkelen skal det lenkes til post i Brage IMR, ikke direkte til pdf-fil.This is the author's last version of the article after peer review and is not the publisher's version, usually referred to as postprint. You will find a link to the publisher's version in Brage IMR. It is recommended that you obtain the references from the publisher's site.Linking to the article should be to the Brage-record, not directly to the pdf-file. AbstractA bite-and-pull demand-feeding system was introduced to groups of cultured cod (Gadus morhua). For half of the groups trigger actuations were rewarded with food, while actuations were unrewarded in the other groups. Initially, cod responded with frequent triggering, irrespective of whether triggering was rewarded with food or not. The high initial curiositydriven triggering rate declined rapidly, and was almost perfectly described by an exponential decay model with a decay rate of 7% min -1 . After 3 hours, the triggering frequency of the rewarded fish diverged from that of unrewarded fish, and it remained higher throughout the 9 days of the experiment. The initial curiosity-driven triggering allowed the cod to establish the relationship between action and reward in a short time. It is inferred that the time trajectory of action frequency of rewarded fish is the result of several factors and that operant learning can only be verified by comparing action frequencies of rewarded and unrewarded fish, and not by the temporal development in action frequency of rewarded fish alone.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Also, the triggering rate may be modulated by time varying motivation, e.g. stomach fullness or circadian feeding rhythms (Adron et al, 1973;Chen et al, 2007;Millot and Bégout, 2009), and fish may continue to actuate triggers that are never rewarded, though at a low rate (Adron et al, 1973).…”

Section: Introductionmentioning

confidence: 99%

Exploration and learning of demand-feeding in Atlantic cod (Gadus morhua)

Nilsson

Torgersen

2010

Aquaculture

View full text Add to dashboard Cite

show abstract

“…continues, with fish demanding food at their preferred time of day even when the feeder is turned off; an hourglass mechanism would seem to be ruled out and endogenous control suggested ). In the amberjack (Seriola dumerili) feeding is mediated by an endogenous circadian oscillator, with feeding tending to occur between one and three hours after first light (Chen et al 2007). Similarly an endogenous rhythm appears to control the feeding behaviour of the tench (Tinca tinca) a freshwater fish that feeds at night (Herrero et al 2005).…”

Section: Circadian Rhythmsmentioning

confidence: 99%

Appetite and Feed Intake

Jobling

Alanärä

Noble

et al. 2012

Aquaculture and Behavior

View full text Add to dashboard Cite

This chapter first describes changes in appetite that occur over different time scales in wild fish and the physiological mechanisms that generate these changes. It then gives an account of how food intake and appetite change as young fish develop and mature and the effects of genetic variation and differential experience on these processes. The costs of sustaining a high rate of food intake are then described, as is the way in which these are balanced against the obvious benefits of gaining a good supply of nutrients. The benefits gained by regular appetite cycles are also considered. The implications of natural appetite patterns for fish culture are then discussed, including problems arising from underfeeding and overfeeding and those resulting from failure to match feed delivery to current appetite. Underfeeding causes slow, uneven growth and high levels of aggression, as well as stress and mortality, while overfeeding may result in inefficient production and adverse environmental impact. Potential solutions to such problems are discussed, including the use of on-demand feeding systems that match delivery to appetite. The effects of domestication and captive rearing on feed intake are then considered, together with possible ways of mitigating such effects in fish that are cultured for release.

show abstract

“…Many fishes develop clear circadian rhythms in self-feeding activity, with one or more daily peaks (Chen et al 2002(Chen et al , 2007Amano et al 2006;Millot & Bégout 2009). In sea bass, the rhythm of the most-triggering fish has been found to determine the rhythm of the other individuals of the group (Millot & Bégout 2009).…”

Section: Operant Learningmentioning

confidence: 99%