Effects of small-scale cage aquaculture on Opsariichthys bidens Gunther based on pond

doi:10.16178/j.issn.0528-9017.20240267

Abstract

Abstract:

To investigate the effect of small-scale cage aquaculture on Opsariichthys bidens Gunther in pond, the experiment placed plastic fishing rafts in the middle of the pond and tied cage to the polyethylene. They were divided into 3 groups (numbered M1, M2, and M3), with cage size of 2.0 m in length, 2.0 m in width, and 1.5 m in depth. Each small-scale cage had 360 fish with initial body weight (13.90±0.55) g, and fed with a 41% crude protein puffed formula feed. After 66 days of small-scale cage culture, the results showed that the average survival rate were (70.88±4.83)% of 3 groups, the specific growth rate were (0.97±0.04)%·d^-1, and the feed coefficient were (2.15±0.15). The body weight growth showed an exponential function: y=11.563e^{0.212 5}^x (R²=0.987 9). This experiment also observed that the feeding and growth of Opsariichthys bidens Gunther performed best when water temperatures were 26-30 ℃.

Key words: Opsariichthys bidens Gunther, smal-scale cage aquaculture in pond, growth performances

CLC Number:

S965

HE Linqiang, JIN Jing, YUAN Fan, LI Heng, CHEN Xiaoming, DING Xueyan, ZHOU Fan, BEI Yijiang. Effects of small-scale cage aquaculture on Opsariichthys bidens Gunther based on pond[J]. Journal of Zhejiang Agricultural Sciences, 2024, 65(6): 1277-1281.

Figures/Tables 7

Fig.1 Changes of temperature in pond net cage aquaculture of Opsariichthys bidens Gunther

Fig.2 Changes of pH value in pond net cage aquaculture of Opsariichthys bidens Gunther

Fig.3 Changes of nitrite content in pond cage aquaculture of Opsariichthys bidens Gunther

Fig.4 Changes of ammonia nitrogen content in pond cage aquaculture of Opsariichthys bidens Gunther

Table 1 Growth performance of Opsariichthys bidens Gunther in test groups

网箱	初始体重/g	终末体重/g	存活率¹/ %	特定生长率²/ (%·d^-1)	单网箱终末总质量/g	单网箱饲料投喂量/g	饲料系数³
M1	13.90±0.55	25.85	69.81	0.94	5 506.05	7 673.65	2.26
M2	13.90±0.55	27.28	66.67	1.02	5 537.84	7 351.19	1.98
M3	13.90±0.55	26.25	76.15	0.96	6 221.25	7 681.23	2.20
平均	13.90±0.55	26.46±0.74	70.88±4.83	0.97±0.04	5 755.07±404.08	7 568.69±188.40	2.15±0.15

Fig.5 Changes of body weight in pond cage aquaculture of Opsariichthys bidens Gunther

Fig.6 Changes in survival rates of three groups of Opsariichthys bidens Gunther in pond cage aquaculture at different time

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