Abstract:
The quantitative feeding method was used to study the influence difference of the bait with different characters on the growth performance of
Panulirus homarus. 600 similar specifications of the same group of
Panulirus homarus with body length of 9.10~9.84 cm and body weight of 50.30~62.25 g were randomly divided into two groups. Group A was fed with semi-cooked shellfish, and group B was fed with fresh shellfish. The growth test was conducted in an indoor cement pond for 120 days. Every 15 days, 50 lobsters were randomly selected from different groups to analyze the difference of specific growth rate, body length growth rate, body weight growth rate, bait conversion rate and survival rate, so as to select the best bait for culture of lobsters. The results showed that the specific growth rates of group A and group B were(0.86±0.04)% and(0.87±0.06)%, respectively, and there was no significant difference between them. The increase rate of body length in group A and group B were(49.13±0.63)% and(179.23±0.84)%, respectively. The increase rate of body weight in group A and group B were(55.58±0.71)% and(185.10±0.91)% respectively. The feed conversion rates of group A and group B were(130.55±0.45)% and(1 333.32±0.52)%, respectively, and the difference was extremely significant(
P<0.01). The ratio of A to B was 1:10.21. The survival rate of group A was significantly higher than that of group B(95.67% and 90.33%, respectively)(
P<0.05). The feed cost of group A was significantly lower than that of group B, which were 990.64 yuan and 1 147.59 yuan, respectively(
P<0.05). Therefore, while factors such as the difficulty of obtaining bait, the survival rate of lobsters and the breeding cost were taken into consideration comprehensively, feeding semi-cooked shellfish could improve the breeding effect.