The effects of food type, meal size and body weight on digestion and gastric evacuation in turbot, Scophthalmus maximus L.

Abstract

Experiments were conducted on a size range of turbot using whole prey organisms. Stomach contents were serially sampled at intervals after feeding on a range of meal sizes of sandeels and sprats. Gastric evacuation was essentially linear with time, though some fluctuations were observed. Control over evacuation appeared to be by regulation of the processes leading to chyme production. Close agreement between evacuation rate and the satiation feeding rate of fish in laboratory experiments was observed. Implications of these findings for techniques of estimating the feeding rates of natural fish populations are discussed.

Gastrointestinal and metabolic effects of feeding schedule on voluntary feed intake and growth of European eel, Anguilla anguilla

“…The feeding schedule has been shown to affect growth of fish through an effect on average group feed intake (Seymour 1984; Van der Meer et al 1997;Ruohonen et al 1998;Riche et al 2004) but also on variation in intake and growth between individuals within a group (Jobling 1983;Petursdottir 2002;Almazan-Rueda et al 2004). Effects on feed intake are mainly linked to gastrointestinal factors, stomach fullness and stomach emptying after a single satiation meal, often combined with measured or calculated implications towards optimal feeding schedules (Grove et al 1978;1985;Bromley 1987;Hossain et al 1998) The present study intended to optimise the feeding schedule for European eel, Anguilla anguilla L., by examining the effect of feeding schedule on group and individual feed intake and growth and by investigating if variation in feed intake and growth with feeding schedule could be related to variation in gastrointestinal and metabolic factors.…”

Growth Performance and Digestive Characteristics of Starry Flounder Platichthys stellatus on the Moist and Extruded Pellets

“…실험에 사용한 순환여과시스템은 Kim (2011) Base on 4 kcal/g protein, 9 kcal/g lipid and 4 kcal/g carbohydrate (Cho et al, 1982 (Jobling, 1986;Bromley, 1987). (Bromley, 1987).…”

“…(Bromley, 1987). 그러나 일반적으로 위 내용물 의 통과 속도는 생물의 크기, 사료의 수분 함량 등 사료의 질과 양, 사육 수온 등에 따라 달라지는데 (Jobling, 1980;Hilton et al, 1981), 보통 지수적(exponential), 평방근(square-root) 그 리고 직선적(linear)인 감소를 보인다 (Jobling, 1987).…”

Effects of meal and body sizes on gastric evacuation rate in brooktrout Salvelinus fontinalis (Mitchill, 1814) fed commercial pellets in group feeding

“…GE experiments are often performed by maintaining individual fish which is considered to be a standard practice (Jobling, 1981;Persson, 1981;Bromley, 1987;Andersen, 1999;Temming and Herrmann, 2001); however, some of the fish species such as Atlantic herring Clupea harengus, Atlantic mackerel Scomber scombrus, Sprat Sprattus sprattus and sardines Sardinops sagax (Jenyns), cannot be maintained individually. Therefore, GE experiments in such species may only be performed using groups of fishes (Bernreuther et al, 2009).…”