The effect of aerobic exercise training on growth performance, digestive enzyme activities and postprandial metabolic response in juvenile qingbo (Spinibarbus sinensis)

Effects of prolonged exercise training and exhaustive chasing training on the swimming performance of an endangered bream Megalobrama pellegrini

“…After 4 wk of acclimatization, 150 fish with a similar size (5.10 ± 0.08 g, 6.52 ± 0.10 cm) were slightly anesthetized (neutralized MS222, tricaine methanesulfonate, 50 mg l The protocols of prolonged exercise training followed Li et al (2013). Our pilot experiment found that a water velocity > 2 cm s −1 can guarantee the full water exchange which is the prerequisite of the present study, but a water velocity > 5 cm s −1 caused spontaneous swimming activities in juvenile M. pellegrini.…”

“…So far, a large number of the studies investigating the effects of exercise training on fish species have studied cold-water salmonids (Davison & Goldspink 1977, Davison 1997, Castro et al 2011. However, there has been some recent work on warm-water teleosts that has increased our knowledge of exercise training in these fish species (Li et al 2013(Li et al , 2016. Survival, growth and reproduction in fish depend heavily on swimming ability (Brett 1964, Blake 2004, Graham et al 2004, Kieffer 2010, Cai et al 2014.…”

The effects of constant and diel-fluctuating temperature acclimation on the thermal tolerance, swimming capacity, specific dynamic action and growth performance of juvenile Chinese bream

“…Fish were gently removed from the respirometer chamber and anesthetized with tricaine methane sulfonate (MS-222, 80 mg L −1 ) for approximately 2-3 min in a small container until they lost their normal reflexes. The tip of a syringe (1 mL) attached by a plastic cannula was then inserted into the proximal intestine (Chinese bream possess no stomach), and the chyme was gently introduced for about 1 min (Li et al, 2013). The fish were subsequently returned to the respirometer chamber.ṀO 2 was measured at 1 h intervals for 12 h. The following formula was used to calculate theṀO 2 (mg kg −1 h −1 ) of individual fish:…”

“…After 24 h of fasting, 8 temperatureacclimated fish from each constant-temperature group and 16 fish from the diel-fluctuating temperature group were placed in the respirometer chamber for 24 h acclimation (the diel-fluctuating temperature group was measured at both 15 and 25°C).ṀO 2 was measured three times at 1 h intervals, and the average value was taken as the restinġ MO 2 (ṀO 2rest ). Individual fish from each group was fed a meal-sized compound feed (pellet feed diluted to a ratio of 1:1.5 with water), comprising approximately 1.5% of their body mass (Li et al, 2013). A gavage protocol was performed because the fish did not voluntarily eat in the respirometer chamber.…”

Flow and stress acclimation both enhance predator avoidance in a common cyprinid fish

“…A previous study in qingbo found that fish acclimated to fast-flowing water showed im proved growth performance and better body condition in comparison to those acclimated to still water (Li et al 2013). This may be one important reason why fish in the flow group exhibited en hanced swimming performance.…”