TY - JOUR
T1 - Effect of density and sex ratio on gonad development and spawning in the crayfish Procambarus llamasi
AU - Claudia, Carmona Osalde
AU - Miguel, Rodríguez Serna
AU - Miguel Angel, Olvera Novoa
AU - Gutiérrez-Yurrita, Pedro Joaquín
N1 - Funding Information:
This research was supported by the National Council of Science and Technology (CONACyT) through a scholarship (No. Reg. 86192). We also thank to the feeding company PURINA® for providing camaronina 40 for this experiment.
PY - 2004/6/14
Y1 - 2004/6/14
N2 - The effect of density and sex ratio on maturation and spawning in the crayfish Procambarus llamasi was evaluated during a 90-day study. Five stocking densities were tested: 10 org/m2 (5 females/m2), 20 org/m2 (15 females/m2), 34 org/m2 (29 females/m2), 49 org/m2 (44 females/m2) and 64 org/m2 (59 females/m2), and five sex ratios (male/female) 1:1, 1:3, 1:6, 1:9 and 1:12. The Maturation Index (MI) results exhibited no significant differences between the high-density treatments, though there was a significant difference between these and the lowest density treatment. Females in the lowest density did not mature or spawn. The Gonadosomatic Index (GSI) showed no differences between densities, with high values in all treatments. Spawning increased in direct relation to density with the highest spawning percentage recorded in the highest density treatment. Density had a clear and significant effect on maturation and spawning in P. llamasi.
AB - The effect of density and sex ratio on maturation and spawning in the crayfish Procambarus llamasi was evaluated during a 90-day study. Five stocking densities were tested: 10 org/m2 (5 females/m2), 20 org/m2 (15 females/m2), 34 org/m2 (29 females/m2), 49 org/m2 (44 females/m2) and 64 org/m2 (59 females/m2), and five sex ratios (male/female) 1:1, 1:3, 1:6, 1:9 and 1:12. The Maturation Index (MI) results exhibited no significant differences between the high-density treatments, though there was a significant difference between these and the lowest density treatment. Females in the lowest density did not mature or spawn. The Gonadosomatic Index (GSI) showed no differences between densities, with high values in all treatments. Spawning increased in direct relation to density with the highest spawning percentage recorded in the highest density treatment. Density had a clear and significant effect on maturation and spawning in P. llamasi.
KW - Density
KW - Procambarus llamasi
KW - Sex ratio
UR - http://www.scopus.com/inward/record.url?scp=2442514188&partnerID=8YFLogxK
U2 - 10.1016/j.aquaculture.2004.02.031
DO - 10.1016/j.aquaculture.2004.02.031
M3 - Artículo
SN - 0044-8486
VL - 236
SP - 331
EP - 339
JO - Aquaculture
JF - Aquaculture
IS - 1-4
ER -