Mythical models of gastric emptying and implications for food consumption studies

Jobling, Malcolm

doi:10.1007/978-94-017-1158-6_3

Cited by 23 publications

(12 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Early studies on mammals demonstrated that gastric distension had a reflex inhibitory effect on the electrical and mechanical activity of the duodenum (Daniel & Wiebe, 1966). In mammals it is known that gastric emptying is regulated by feedback mechanisms dependent to a varying degree on (1) smooth musculature contractions of the stomach wall and (2) contractions of the pyloric and intestinal musculature (Jobling, 1986). From the observation that gastric evacuation rate proceeded faster after small meals were consumed by dogfish, it can be hypothesized that the amount of food in the cardiac stomach, and thus the degree of stomach wall distension could initiate physiological mechanisms that alter the pattern of evacuation.…”

Section: Discussionmentioning

confidence: 99%

“…The decrease in cardiac stomach contents of adult S. canicula was modelled using three standard relationships: linear; exponential and square root (for discussions on the applicability of each model see Medved, 1985;Jobling, 1986;Persson, 1986;Ruggerone, 1989;Bromley, 1994). The generalized exponential relationship given in Bromley (1994):…”

Section: Modelling and Statistical Analysismentioning

confidence: 99%

“…However, speculations relating to the interplay of various physiological factors exist in the literature based upon observations from different fish species and from the information available on mammalian systems (e.g. Jobling, 1986). It has long been suggested that appetite (voluntary food intake) is not regulated by any single physiological factor, but probably by a number of interdependent visceral and systemic influences (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies on teleost fishes have outlined the factors probably responsible for appetite regulation, and thus in part the control of feeding behaviour, but have not shown experimentally the possible modes of operation of such variables (e.g. Fletcher, 1984;Grove et al, 1985;Jobling, 1986). More recent investigations have however, postulated the functional significance of possible regulatory pathways (Aldman, 1994).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Gastric Emptying Rate and Return Of Appetite In Lesser Spotted Dogfish,Scyliorhinus Canicula(Chondrichthyes: Elasmobranchii)

1996

View full text Add to dashboard Cite

The rates of gastric evacuation and return of appetite in adultScyliorhinus caniculaat 15°C were quantitatively assessed by serial x-radiographs of fish fed a moist diet containing radio-opaque glass beads, and by re-feeding trials. The evacuation of food from the cardiac stomach of dogfish was exponential in nature. Dogfish were fed small (~26 g of squid diet per fish) and large (~55g of squid diet per fish) meals and greater relative instantaneous rates of emptying occurred after consumption of small meals (k=0–0215) than larger meals (k=0·0086), indicating that the pattern of emptying was dependent on the degree of stomach fullness. There was inverse proportionality between rates of gastric evacuation (GE) and return of appetite (RA) after consumption of similar sized meals, with instantaneous rate coefficients being similar in magnitude (GE, k=0·0086; RA, k=0·0063). These results suggest that the rate of gastric evacuation is closely correlated with the return of appetite inS. canicula.An hypothesis is forwarded describing the possible physiological role of gastric evacuation rate in appetite regulation.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Modelling and Statistical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gastric Emptying Rate and Return Of Appetite In Lesser Spotted Dogfish,Scyliorhinus Canicula(Chondrichthyes: Elasmobranchii)

1996

View full text Add to dashboard Cite

show abstract

“…The second model, the most widely accepted in the literature to describe food evacuation in most fish species, is probably more appropriate for describing the evacuation of small, relatively easily digested particles from the stomach (Jobling, 1986). In this model: R = 0.0175T−0.0442, where T is the temperature in degrees Celsius.…”

Section: Methodsmentioning

confidence: 99%

Daily ration and feeding activity of juvenile hake in the central Mediterranean Sea

2008

View full text Add to dashboard Cite

We investigated daily ration, feeding rhythms and gastric evacuation rates of juvenile (<16cm total length) European hake Merluccius merluccius, using stomach samples collected during four 24-hour trawl surveys carried out in 2001-2002 on the continental shelf-break (from 120 m to 160 m in depth) off the western coast of central Italy (central Mediterranean Sea). In each survey 8 hauls Of 30 minutes were performed every three hours throughout the 24-hour period to cover the entire diel cycle. Diet of juvenile hake was mostly composed of the euphausiid Nyctiphanes couchii, showing a peak in stomach contents during early morning followed by a daytime decrease. Fullness index (%FI) was generally higher during sunrise when migratory activity ceased and juvenile hake return to the bottom after feeding. Concerning the hake abundance the highest density value was obtained in May during the recruitment period. Two independent daily ration estimates were produced. First, an empirical attempt to estimate the daily amount of food consumed was obtained by back-calculating the fresh weight of euphausiid prey ingested by juvenile hake. Estimated values ranged from 4.96-5.89% body wet weight (%BW). Second, the daily ration was computed applying the exponential gastric evacuation models proposed by Elliot & Persson (1978) and Eggers (1979). Daily ration values obtained using these consumption models produced a considerable (15 - 20%) underestimation of consumption rate for juvenile hake

show abstract

Techniques for Measuring Feed Intake

Jobling¹,

Covès²,

Damsgård³

et al. 2001

Food Intake in Fish

View full text Add to dashboard Cite

Mythical models of gastric emptying and implications for food consumption studies

Cited by 23 publications

References 47 publications

Gastric Emptying Rate and Return Of Appetite In Lesser Spotted Dogfish,Scyliorhinus Canicula(Chondrichthyes: Elasmobranchii)

Gastric Emptying Rate and Return Of Appetite In Lesser Spotted Dogfish,Scyliorhinus Canicula(Chondrichthyes: Elasmobranchii)

Daily ration and feeding activity of juvenile hake in the central Mediterranean Sea

Techniques for Measuring Feed Intake

Contact Info

Product

Resources

About