Photoperiod influences the growth, food intake, feed efficiency and digestibility of red sea bream (Pagrus major)

Effects of Photoperiod Manipulation on Growth Performance and Hematological Responses of Juvenile Caspian Roach Rutilus rutilus caspicus

“…The results of the present study indicated that juvenile Caspian roach were exposed to 24L and 18L:6D photoperiods had significantly better growth, WG and SGR than those exposed to 12L:12D, 6L:18D and 24D photoperiods. Similar results have been reported that growth performance could be enhanced by continuous light or extending the light photoperiod in Atlantic salmon juvenile, Salmo salar (Saunders and Harmon, 1990), red seabream juveniles, Pagrus major (Biswas et al, 2005(Biswas et al, , 2006. Also, the growth of sole, Solea solea (Fuchs, 1978), European seabass, Dicentrarchus labrax (Barahona-Fernandes, 1979), barramundi, Lates calcarifer (Barlow et al, 1995), olive flounder, Paralichthys olivaceus (Dou et al, 2003), black porgy, Mylio macrocephalus (Kiyono and Hirano, 1981), gilthead seabream, Sparus aurata (Tandler and Helps, 1985), rabbit fish, Siganus guttatus (Duray and Kohno, 1988) and snapper, Pagrus auratus (Fielder et al, 2002) larvae were better at 18 and 24 h light periods than at 12:12 h or shorter light periods.…”

“…feeding activity, growth and feed utilization (Boehlert, 1981;Woiwode and Adelman, 1991). Photoperiod manipulation can regulate physiological functions of fish such as growth, survival, gonadal maturation, reproduction (Björnsson et al, 2000;Ginés et al, 2003;Bonnet et al, 2007) and metabolism (Biswas and Takeuchi, 2003;Biswas et al, 2005Biswas et al, , 2006Taylor et al, 2006). In general, long photoperiod improves the performance of fish, probably because of increased feed availability (Boeuf and Le Bail, 1999).…”

“…The manipulation of environmental factors such as temperature, salinity and photoperiod currently is used to modulate fish growth in culture (Jobling, 1994). Among them, photoperiod has been used successfully to improve the larval (Hart et al, 1996), juvenile and adult growth of some species (Simensen et al, 2000;Biswas and Takeuchi, 2003;Petit et al, 2003;Biswas et al, 2005Biswas et al, , 2006. When photoperiod is increased, fish may adjust to the new photoperiod by displaying higher nected to an air pump, and 20% of the water was renewed daily with receiving filtered brackish water from the center tank.…”

Effect of photoperiod on locomotor activity, growth, feed efficiency and gonadal development of Nile tilapia

“…In this case, the fish possibly had the highest appetite, as demonstrated by Biswas et al (2005Biswas et al ( , 2006. As described in a review by Boeuf & Bail (1999), Gross et al (1965) were the first to demonstrate that growth is influenced by photoperiod by not only stimulating consumption, but also by improving the feed conversion ratio.…”

“…According to Dabrowski (1975), fish that make use of vision to capture food might be harmed when food is distributed in environments where there is low light, or where the light period during the day is short. The increase in feed intake under long photoperiods might be due to the increased activity of fish under these conditions; they have a greater foraging activity when food is provided (Johnson & Björnsson, 1994;Mccormick et al, 1995;Biswas et al, 2005, Biswas et al, 2006, which then stimulates the production of orexigenic hormones. Furthermore, in Values followed by different letters are significantly different according to the Tukey test (P<0.001).…”