Effects of microalgal powder substitution for live microalgae on large-scale nursery of mudflat shellfish

doi:10.16178/j.issn.0528-9017.20240583

Abstract

Abstract:

In this study, the effects of microalgal powder substitution for live microalgae at a ratio of 0, 50% and 100% (denoted as the 100% live microalgae group, 50% microalgae powder group, and 100% microalgae powder group, respectively) on large-scale nursery of mudflat shellfish were investigated using planktonic larvae of Tegillarca granosa and Meretrix meretrix, and juveniles of Ruditapes philippinarum. The results showed that during the cultivation of Tegillarca granosa planktonic larvae, starting from day 12, the shell length in the 100% microalgae powder group was significantly (p<0.05) lower than that in the 50% microalgae powder group and the 100% live microalgae group, with no significant difference between the latter two groups. No significant differences in shell length were observed among the three groups during the rearing of Meretrix meretrix planktonic larvae. For Ruditapes philippinarum juveniles, the survival rate of both the 100% live microalgae group and the 50% microalgae powder group was significantly higher than that of the 100% microalgae powder group, with no significant difference between the former two groups. In conclusion, microalgae powder is a viable substitute for live microalgae in the artificial large-scale rearing of these three mudflat shellfish species, with the 50% substitution ratio demonstrating better applicability.

Key words: microalgae powder, mudflat shellfish, growth, feed replacement

CLC Number:

S968.3

LI Tengteng, FANG Jun, HUANG Chengjing, REN Peng, TENG Shuangshuang, SHAO Yanqing, JIA Jing. Effects of microalgal powder substitution for live microalgae on large-scale nursery of mudflat shellfish[J]. Journal of Zhejiang Agricultural Sciences, 2026, 67(1): 166-170.

Figures/Tables 5

References 6

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处理	悬浮颗粒物含量		化学需氧量		磷酸盐含量
处理	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h
100%鲜活微藻组	64.33±2.36 b	57.67±3.09 a	1.0±0.1 a	0.9±0.1 a	0.020±0.011 a	0.029±0.003 a
50%微藻粉组	76.33±9.10 a	65.33±1.70 a	1.0±0.2 a	0.8±0.1 a	0.011±0.006 a	0.031±0.001 a
100%微藻粉组	74.33±1.70 a	59.33±2.36 a	1.0±0.1 a	0.9±0.1 a	0.015±0.004 a	0.035±0.002 a
处理	亚硝酸盐含量		硝酸盐含量		氨氮含量
处理	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h
100%鲜活微藻组	0.005±0.001 a	0.004±0.001 a	0.452±0.009 a	0.422±0.024 a	0.043±0.001 a	0.050±0.001 b
50%微藻粉组	0.004±0.001 a	0.006±0.001 a	0.416±0.039 a	0.446±0.010 a	0.049±0.006 a	0.058±0.003 a
100%微藻粉组	0.005±0.001 a	0.007±0.001 a	0.428±0.031 a	0.458±0.019 a	0.050±0.005 a	0.053±0.002 ab

处理	悬浮颗粒物含量		化学需氧量		磷酸盐含量
处理	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h
100%鲜活微藻组	64.33±2.36 b	57.67±3.09 a	1.0±0.1 a	0.9±0.1 a	0.020±0.011 a	0.029±0.003 a
50%微藻粉组	76.33±9.10 a	65.33±1.70 a	1.0±0.2 a	0.8±0.1 a	0.011±0.006 a	0.031±0.001 a
100%微藻粉组	74.33±1.70 a	59.33±2.36 a	1.0±0.1 a	0.9±0.1 a	0.015±0.004 a	0.035±0.002 a
处理	亚硝酸盐含量		硝酸盐含量		氨氮含量
处理	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h
100%鲜活微藻组	0.005±0.001 a	0.004±0.001 a	0.452±0.009 a	0.422±0.024 a	0.043±0.001 a	0.050±0.001 b
50%微藻粉组	0.004±0.001 a	0.006±0.001 a	0.416±0.039 a	0.446±0.010 a	0.049±0.006 a	0.058±0.003 a
100%微藻粉组	0.005±0.001 a	0.007±0.001 a	0.428±0.031 a	0.458±0.019 a	0.050±0.005 a	0.053±0.002 ab

处理	悬浮颗粒物含量		化学需氧量		磷酸盐含量
处理	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h
100%鲜活微藻组	44.00±4.24 a	43.00±4.55 a	1.5±0.2 a	1.3±0.1 a	0.077±0.009 a	0.069±0.001 a
50%微藻粉组	47.30±0.47 a	44.70±3.09 a	1.3±0.2 a	1.0±0.2 a	0.053±0.002 b	0.059±0.003 b
100%微藻粉组	47.00±3.09 a	44.70±3.47 a	1.8±0.2 a	1.1±0.2 a	0.047±0.002 b	0.060±0.003 b
处理	亚硝酸盐含量		硝酸盐含量		氨氮含量
处理	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h
100%鲜活微藻组	0.015±0.001 a	0.009±0.001 a	0.745±0.018 a	0.712±0.014 a	0.068±0.019 a	0.073±0.010 a
50%微藻粉组	0.007±0.001 b	0.006±0.000 b	0.730±0.055 a	0.693±0.045 a	0.064±0.008 a	0.068±0.017 a
100%微藻粉组	0.007±0.001 b	0.006±0.001 b	0.702±0.055 a	0.614±0.045 a	0.049±0.008 a	0.052±0.010 a

处理	悬浮颗粒物含量		化学需氧量		磷酸盐含量
处理	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h
100%鲜活微藻组	44.00±4.24 a	43.00±4.55 a	1.5±0.2 a	1.3±0.1 a	0.077±0.009 a	0.069±0.001 a
50%微藻粉组	47.30±0.47 a	44.70±3.09 a	1.3±0.2 a	1.0±0.2 a	0.053±0.002 b	0.059±0.003 b
100%微藻粉组	47.00±3.09 a	44.70±3.47 a	1.8±0.2 a	1.1±0.2 a	0.047±0.002 b	0.060±0.003 b
处理	亚硝酸盐含量		硝酸盐含量		氨氮含量
处理	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h	投喂后1 h	投喂后24 h
100%鲜活微藻组	0.015±0.001 a	0.009±0.001 a	0.745±0.018 a	0.712±0.014 a	0.068±0.019 a	0.073±0.010 a
50%微藻粉组	0.007±0.001 b	0.006±0.000 b	0.730±0.055 a	0.693±0.045 a	0.064±0.008 a	0.068±0.017 a
100%微藻粉组	0.007±0.001 b	0.006±0.001 b	0.702±0.055 a	0.614±0.045 a	0.049±0.008 a	0.052±0.010 a

处理	1 d		5 d		9 d		13 d		存活率/%
处理	质量/ g	规格/ (10⁴ kg^-1)	质量/g	规格/ (10⁴·kg^-1)	质量/g	规格/ (10⁴ kg^-1)	质量/g	规格/ (10⁴ kg^-1)	存活率/%
100%鲜活微藻组	100±1 a	80	134±2 a	58	171±1 a	46	186±1 a	42	98
50%微藻粉组	100±1 a	80	129±2 a	62	160±1 a	50	169±1 a	46	97
100%微藻粉组	100±1 a	80	112±1 b	68	120±2 b	62	138±2 b	52	90