DOI:10.1577/A05-045.1 Influence of Photoperiod and Feed Delivery on Growth and Survival of First-Feeding Arctic Char

• Main Authors: M. G. Burke, M. R. Kirk, N. A. Macbeth, D. J. Bevan, R. D. Moccia
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic; Salvelinus alpinus
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.501.4904; http://www.aps.uoguelph.ca/~rmoccia/RDM articles/Charr Feeding-Lighting.pdf

Abstract.—First-feeding Arctic char Salvelinus alpinus were subjected to two different photo-periods (light conditions at latitude 438289N [normal] and 24 h of continuous light) and two different feeding schedules (fed only during the natural photoperiod [normal] and 24-h continuous feeding) for 12 weeks. Arctic char subjected to 24 h of continuous light and continuous feed availability had a significantly lower cumulative mortality (P, 0.05) and higher mean final weights (P, 0.05) without an accompanying increase in within-treatment variability compared with fish raised in either ambient photoperiods or under restricted feeding regimens. These results indicate potential commercial benefits associated with extended photoperiod and feeding regimens for the culture of juvenile Arctic char. The purpose of this study was to assess the ef-fects of two photoperiods and two feeding regi-mens on the survival and growth of first-feeding Arctic char Salvelinus alpinus. Our objective was to test the hypothesis that extended feeding and photoperiod regimens would result in a more suc-