Open AccessEFFECTS OF STOCKING SIZE AND DENSITY ON GROWTH AND SURVIVAL OF Macrobrachium rosenbergii (DE MAN) IN PONDS
Author(s) -
Willis Scott A.,
Berrigan Mark E.
Publication year - 1977
Publication title -
proceedings of the annual meeting ‐ world mariculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0164-0399
DOI - 10.1111/j.1749-7345.1977.tb00123.x
Subject(s) - stocking , macrobrachium rosenbergii , zoology , biology , juvenile , body weight , fishery , ecology , prawn , endocrinology
Postlarval and juvenile Macrobrachium rosenbergii were stocked in twelve 0.025 ha earthen ponds to study the effects of stocking size and density on growth and survival. The experiment was comprised of four treatments, three replicates each. One treatment consisted of juveniles (0.760‐0.792 g) stocked at 5/m 2 . The remaining treatments were postlarvae (0.044‐0.063 g) stocked at 5, 10, and 20/m 2 . Following each four week sampling interval, feeding rates were adjusted based on mean body weight and an estimated 5% mortality. All ponds were fed Purina Marine Ration 25* at rates of 30, 15, 8, 4, 2, and 2% body weight for each respective sampling interval during the 24 week study. Juveniles grew to a mean weight of 43.256 g while postlarvae reached 29.749 respectively. Survival ranged from 38 to 92% and final feed conversion ratios ranged from 1.88:1 to 0.96:1. The maximum equivlent production of 2278.61 kg/ha occurred in ponds stocked with 20/m 2 .