Short-term Effects of First-prey Type and Number on Survival and Growth of Intensively Cultured Spotted Seatrout, Cynoscion nebulosus (Sciaenidae), Larvae
Coastal Sciences, Gulf Coast Research Laboratory
Five test diets - 20, 10 rotifers/mL/d, 5 rotifers/mL/d + 3 nauplii/mL/d, 5 and 8 nauplii/mL/d - were used to examine the effect of Acartia tonsa nauplii and a small strain of rotifers on survival, myotome height, notochord length, and condition (myotome height/notochord length) of spotted seatrout, Cynoscion nebulosus, larvae through 6-d posthatch (PH). Diet did not affect survival. Larvae fed 5 and 8 nauplii/mL or 5 rotifers + 3 nauplii were longer, taller, and in better condition than larvae fed either 10 or 20 rotifers/mL. The condition of larvae fed diets with nauplii declined after Day 5 which suggests a shortage of prey in those diets after Day 4 or 5. Although copepod nauplii offer substantial short-term benefits in the culture of spotted seatrout, further study is required to determine the number of nauplii and/or rotifers necessary in the diet beyond Day 4 and to assess the long-term impact of the different diets.
Journal of the World Aquaculture Society
Lemus, J. T.,
Blaylock, R. B.,
Lotz, J. M.
(2010). Short-term Effects of First-prey Type and Number on Survival and Growth of Intensively Cultured Spotted Seatrout, Cynoscion nebulosus (Sciaenidae), Larvae. Journal of the World Aquaculture Society, 41(3), 455-463.
Available at: http://aquila.usm.edu/fac_pubs/837