Gonadal development,
spawning, growth and survival of the crayfish Procambarus llamasi at
three different water temperatures
C. Carmona-Osalde, M. Rodriguez-Serna, M.A.
Olvera-Novoa, P.J. Gutierrez-Yurrita-2004
Aquaculture, 232(1-4): 305-316
Abstract:
A study was done of the effect of three water
temperatures (16, 21 and 26 °C) on the growth, survival, gonad development
and spawning rates of Procambarus llamasi during a 90-day trial.
Juveniles (<40 mm total length) were stocked at 76 org/m2
density, and at a 1:1 M/F ratio. Growth improved in all treatments with
increasing temperature, showing significant differences between sexes. Males
grew more than females and achieved larger sizes with statistical
differences (p<0.05) between treatments. Survival rate exhibited a
negative relationship to temperature, with significant differences (p<0.05)
between the 16 °C treatment and the others, but not between the 21 and 26
°C. Survival rate decreased from 90% at 16 °C to 42% at 26 °C. Ovary
development increased as temperature increased. The gonadosomatic and
maturation indexes were significantly different (p<0.05) between
the 16 °C treatment and the others, but not between the 21 and 26 °C
treatments. Spawning rate exhibited no relationship to temperature, with
optimum results (22%) at 21 °C.
(Departamento de Recursos del Mar, Unidad Mérida
(CINVESTAV), Centro de Investigación y de Estudios Avanzados del IPN, Km. 6
Antigua Carretera a Progreso, A.P. 73 Cordemex, 97310, Mérida, Yucatán,
Mexico, e-mail of C. Carmona-Osalde: carmona@mda.cinvestav.mx,
e-mail of M. Rodriquez-Serna: mrs@fciencias.unam.mx,
e-mail of P.J. Gutierrez-Yurrita: yurrita@uaq.mx)