Effect of Transport Density on Water Quality in Water Tank of Khanka Culter Alburnus

doi:10.11924/j.issn.1000-6850.casb2020-0791

Abstract

Abstract:

To study the effects of density on the transport water quality and survival rate of C. albarnus juvenile fish, determine the appropriate transport density and provide reference for scientific transport of Culter albarnus, C. albarnus was transported in plastic bucket for 10 h at 6 different transport densities (D = 20、40、60、80、100、120 g/L). The effects of different transport densities on ammonia nitrogen, nitrite concentration and survival rate of C. albarnus were investigated. The results showed that the values of 48 h-LC₅₀ and 96 h-LC₅₀ of ammonia nitrogen to C. albarnus were 22.66 mg/L and 16.70 mg/L respectively, and the safe concentration was 1.67 mg/L; the values of 48 h-LC₅₀ and 96 h-LC₅₀ of nitrite to C. albarnus were 0.18 mg/L and 0.12 mg/L respectively, and the safe concentration of nitrite was 0.01 mg/L. The survival rate in 20 g/L and 40 g/L group was 100% at 10 h, and the survival rate in 60, 80, 100 and 120 g/L group decreased significantly compared with that of 0 h (P<0.05), and the survival rate in 120 g/L group was 0% at 10 h; the pH value in each group showed a downward trend with the increase of transportation time, and the downward trend in high density group was greater than that in low density group; with the increase of transportation time, the concentration of ammonia nitrogen in each group showed an upward trend (P<0.05), and the higher the density, the more significant the increase of ammonia nitrogen concentration was; the nitrite concentration in each group increased with the increase of transportation time, which was positively correlated with the density of C. albarnus. The higher the density, the more significant the increase of nitrite concentration was (P<0.05). In the simulated transporting process, the ammonia nitrogen and nitrite content of water quality are affected by both the transporting time and fish density. The longer the transporting time and the higher the fish density, the higher the ammonia nitrogen and nitrite concentration the water will contain, and the lower the survival rate of Khanka C. Alburnus will be.

Key words: Khanka Culter Alburnus, transport, ammonia nitrogen, nitrite, LC₅₀

CLC Number:

S917.4

Liu Wei, Zhou Guoqin, Pei Xueying, Mao Jianqiang, Chen Shuqiao, Zhang Leiming, Shi Xiaolan. Effect of Transport Density on Water Quality in Water Tank of Khanka Culter Alburnus[J]. Chinese Agricultural Science Bulletin, 2021, 37(35): 124-130.

Figures/Tables 7

References 35

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氨氮浓度/(mg/L)	24 h	48 h	72 h	96 h
0	0^c	0^d	0^d	0^d
13.65	0^c	0^d	13±8^d	22±8^c
17.75	7±3^c	27±8^c	43±6^c	53±6^b
23.08	17±8^c	55±10^b	77±13^b	95±5^a
30	60±11^b	80±11^a	100^a	100^a
39	79±8^a	97±3^a	100^a	100^a

氨氮浓度/(mg/L)	24 h	48 h	72 h	96 h
0	0^c	0^d	0^d	0^d
13.65	0^c	0^d	13±8^d	22±8^c
17.75	7±3^c	27±8^c	43±6^c	53±6^b
23.08	17±8^c	55±10^b	77±13^b	95±5^a
30	60±11^b	80±11^a	100^a	100^a
39	79±8^a	97±3^a	100^a	100^a

亚硝酸盐浓度/(mg/L)	24 h	48 h	72 h	96 h
0	0^e	0^e	0^e	0^f
0.1	0^e	15±5^de	27±8^d	43±6^e
0.13	8±1^de	27±8^cd	43±8^cd	57±6^d
0.17	28±10^cd	43±8^c	57±6^c	70±5^c
0.22	50±12^bc	63±13^b	75±10^b	88±3^b
0.28	62±13^b	80±9^ab	92±8^ab	98±2^ab
0.37	89±11^a	97±3^a	100^a	100^a

亚硝酸盐浓度/(mg/L)	24 h	48 h	72 h	96 h
0	0^e	0^e	0^e	0^f
0.1	0^e	15±5^de	27±8^d	43±6^e
0.13	8±1^de	27±8^cd	43±8^cd	57±6^d
0.17	28±10^cd	43±8^c	57±6^c	70±5^c
0.22	50±12^bc	63±13^b	75±10^b	88±3^b
0.28	62±13^b	80±9^ab	92±8^ab	98±2^ab
0.37	89±11^a	97±3^a	100^a	100^a

组别	半致死浓度LC₅₀/(mg/L)				安全浓度/(mg/L)
组别	24 h	48 h	72 h	96 h	安全浓度/(mg/L)
氨氮	29.484	22.660	18.427	16.706	1.671
亚硝酸盐	0.228	0.178	0.145	0.117	0.012