TY  - JOUR
T1  - The Effects of Different Photoperiod Regimes on Growth, Feed Conversion Rate and Survival of Rainbow Trout (<I>Oncorhynchus mykiss</I>) Fry
AU - , Adem Yavuz Sonmez AU - , Olcay Hisar AU - , Sukriye Aras Hisar AU - , Gonca Alak AU - , Mehmet Sitki Aras AU - , Telat Yanik 
JO  - Journal of Animal and Veterinary Advances
VL  - 8
IS  - 4
SP  - 760
EP  - 763
PY  - 2009
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2009.760.763
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2009.760.763
KW  - Photoperiod
KW  -growth
KW  -feed conversion rate
KW  -survival rate
KW  -Oncorhynchus mykiss
AB  - The effects of 4 different scotophase, the dark phase of photoperiods, LD8:16 (8 h light:16 h dark), LD12:12 (12 h light:12 h dark), LD16:8 (16 h light:8 h dark) and LD24:0 (24 h light:0 h dark) on growth, feed conversion and survival rate of rainbow trout, <I>Oncorhynchus mykiss</I> fry with 2 g initial weight were investigated. The fry exhibited better growth and feed utilization in longer light periods but differences appeared only after 60 days of exposure time. The highest growth rate and lowest feed conversion ratio were recorded in LD16:8 groups. In addition, growth and feed conversion ratio in the fry exposed to LD12:12, LD16:8 and LD24:0 photoperiods were statistically better than that of LD8:16 photoperiod (p<0.05). There was no significant photoperiod effects on the survival rate (p>0.05). Consequently, it can be supposed that growth and feed utilization of rainbow trout fry were improved when cultured in longer light periods.
ER  -