TY - JOUR
T1 - Effect of dietary protein level on spawning and egg quality of redclaw crayfish Cherax quadricarinatus
AU - Rodríguez-González, Hervey
AU - García-Ulloa, Manuel
AU - Hernández-Llamas, Alfredo
AU - Villarreal, Humberto
N1 - Funding Information:
The authors thank Beatriz Romero, Francisco Encarnación, and Ismael Valdivia for assistance during the trials, and Sonia Rocha and Dolores Rondero for the biochemical analyses. The editor at CIBNOR provided assistance with improving the English text. This study was supported by CONACYT grant U39531-Z and CIBNOR grant AC.2.1 to Humberto Villarreal. Hervey Rodríguez is a recipient of a CONACYT doctoral fellowship.
PY - 2006/6/30
Y1 - 2006/6/30
N2 - The effect of dietary protein level on spawning and egg quality was evaluated for female Cherax quadricarinatus. Diets containing four different levels of crude protein were evaluated (22, 27, 32, and 37%). After 100 days, no significant effects of protein level were found on survival (78.6-84.5%), final weight (41.0-43.1g), or fecundity (8.5-9.2 eggs/g female). The percentage of spawning females ranged from 19.7 to 27.3%, and a significant fit, using a quadratic equation estimated maximum spawning to occur at 30% crude protein. Significantly greater egg area (3.90 mm2), volume (39.3 mm3), weight (5.44 μg), and diameter (2.27 mm) were observed at 32% crude protein. There were no significant differences in mean egg protein (2227.1 ± 445.0 μg/egg), lipid (430.9 ± 85.2 μg/egg) and carbohydrate (73.9 ± 10.6 μg/egg) contents, and energy (13.3 ± 2.1 kcal/egg) in relation to dietary protein level. High statistical power indicated that biochemical composition was not affected by dietary protein level. We conclude that a dietary crude protein content of 32% is recommended for reproduction of female redclaw crayfish.
AB - The effect of dietary protein level on spawning and egg quality was evaluated for female Cherax quadricarinatus. Diets containing four different levels of crude protein were evaluated (22, 27, 32, and 37%). After 100 days, no significant effects of protein level were found on survival (78.6-84.5%), final weight (41.0-43.1g), or fecundity (8.5-9.2 eggs/g female). The percentage of spawning females ranged from 19.7 to 27.3%, and a significant fit, using a quadratic equation estimated maximum spawning to occur at 30% crude protein. Significantly greater egg area (3.90 mm2), volume (39.3 mm3), weight (5.44 μg), and diameter (2.27 mm) were observed at 32% crude protein. There were no significant differences in mean egg protein (2227.1 ± 445.0 μg/egg), lipid (430.9 ± 85.2 μg/egg) and carbohydrate (73.9 ± 10.6 μg/egg) contents, and energy (13.3 ± 2.1 kcal/egg) in relation to dietary protein level. High statistical power indicated that biochemical composition was not affected by dietary protein level. We conclude that a dietary crude protein content of 32% is recommended for reproduction of female redclaw crayfish.
KW - Cherax quadricarinatus
KW - Dietary protein
KW - Egg quality
KW - Redclaw crayfish
KW - Spawning
UR - http://www.scopus.com/inward/record.url?scp=33744481764&partnerID=8YFLogxK
U2 - 10.1016/j.aquaculture.2006.01.020
DO - 10.1016/j.aquaculture.2006.01.020
M3 - Artículo
SN - 0044-8486
VL - 257
SP - 412
EP - 419
JO - Aquaculture
JF - Aquaculture
IS - 1-4
ER -