Diversity and Uncertainty of Distribution of Nekton in Culture Areas

doi:10.11924/j.issn.1000-6850.casb2025-0078

Abstract

Abstract:

The distribution of nektons in aquaculture areas is the result of the interaction among nektons, environmental loads and hydrological conditions of culture areas. Thus, it is speculated that the corresponding relationship between the distribution of nektons and aquaculture types is diverse and uncertain. To verify this inference, trap nets were used to collect nektons in the aquaculture areas with different types and their adjacent waters in Sansha Bay, Fujian Province. The results showed that the composition of nektons characterized by species number, Chao 1 index, Shannon-Wiener diversity index, Margalef richness index, Pielou evenness index, key species and dominant species did not exhibit specificity to the types of culture areas; the similarity of the communities of nektons in the aquaculture areas with different types characterized by the key species and dominant species was relatively small, but the community similarity based on all the species of nektons was≥0.84; there was no correlation between the composition of nektons and the types of aquaculture area, and the biological community of nektons did not change with aquaculture area. Thus, it is not reasonable to evaluate the biological effects of cage culture by using the commonly used spatial comparison method, and it is suggested to adopt the adaptive management to manage cage culture.

Key words: Sansha Bay, nekton, biodiversity, cage culture, similarity of community

HUANG Guifang, WANG Xin, GE Changzi, WEI Guanyuan. Diversity and Uncertainty of Distribution of Nekton in Culture Areas[J]. Chinese Agricultural Science Bulletin, 2025, 41(14): 149-156.

Figures/Tables 5

References 25

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站位	毗连养殖区域	距离/km	养殖面积/hm²	养殖种类	年产量/t	养殖年限/a
S1	筏式养殖	0.18	45.97	江蓠	687.21	10
S2	筏式养殖	0.28	41.78	江蓠	297.47	10
S3	筏式养殖	0.42	37.52	江蓠	569.05	10
S4	筏式养殖	0.05	34.73	海带	853.30	15
S5	网箱养殖	0.39	20.00	海参	189.07	10
S6	网箱、筏式养殖	1.29	1.15	牡蛎	25.95	10
S7	筏式养殖	0.03	20.39	紫菜	71.38	15
S8	网箱养殖	0.01	2.08	鲈鱼	27.61	10
S9	筏式养殖	0.48	33.18	海带	587.58	15
S10	筏式养殖	0.08	42.89	江蓠	642.92	15

站位	毗连养殖区域	距离/km	养殖面积/hm²	养殖种类	年产量/t	养殖年限/a
S1	筏式养殖	0.18	45.97	江蓠	687.21	10
S2	筏式养殖	0.28	41.78	江蓠	297.47	10
S3	筏式养殖	0.42	37.52	江蓠	569.05	10
S4	筏式养殖	0.05	34.73	海带	853.30	15
S5	网箱养殖	0.39	20.00	海参	189.07	10
S6	网箱、筏式养殖	1.29	1.15	牡蛎	25.95	10
S7	筏式养殖	0.03	20.39	紫菜	71.38	15
S8	网箱养殖	0.01	2.08	鲈鱼	27.61	10
S9	筏式养殖	0.48	33.18	海带	587.58	15
S10	筏式养殖	0.08	42.89	江蓠	642.92	15

	S2	S3	S4	S5	S6	S7	S8	S9	S10
S1	0.99	0.99	0.99	0.95	0.91	0.92	0.90	0.96	0.96
S2		0.98	0.99	0.94	0.89	0.90	0.87	0.93	0.93
S3			0.99	0.95	0.90	0.92	0.90	0.97	0.97
S4				0.96	0.91	0.92	0.90	0.96	0.95
S5					0.86	0.87	0.84	0.89	0.88
S6						0.99	0.97	0.93	0.92
S7							0.98	0.95	0.95
S8								0.95	0.95
S9									1.00

	S2	S3	S4	S5	S6	S7	S8	S9	S10
S1	0.99	0.99	0.99	0.95	0.91	0.92	0.90	0.96	0.96
S2		0.98	0.99	0.94	0.89	0.90	0.87	0.93	0.93
S3			0.99	0.95	0.90	0.92	0.90	0.97	0.97
S4				0.96	0.91	0.92	0.90	0.96	0.95
S5					0.86	0.87	0.84	0.89	0.88
S6						0.99	0.97	0.93	0.92
S7							0.98	0.95	0.95
S8								0.95	0.95
S9									1.00

	S1	S2	S3	S4	S5	S6	S7	S8	S9	S10
S1		0.87	0.84	0.95	0.83	0.43	0.40	0.46	0.43	0.46
S2	0.75		0.88	0.91	0.87	0.50	0.37	0.48	0.39	0.43
S3	0.67	0.50		0.88	0.84	0.50	0.47	0.43	0.45	0.48
S4	1.00	0.75	0.67		0.87	0.40	0.37	0.48	0.50	0.48
S5	0.75	0.60	0.50	0.75		0.43	0.40	0.46	0.43	0.41
S6	0.17	0.33	0.20	0.17	0.14		0.71	0.67	0.70	0.67
S7	0.20	0.17	0.25	0.20	0.17	0.75		0.70	0.65	0.70
S8	0.20	0.17	0.25	0.20	0.17	0.40	0.50		0.68	0.81
S9	0.25	0.20	0.33	0.25	0.20	0.50	0.67	0.67		0.85
S10	0.25	0.20	0.33	0.25	0.20	0.50	0.67	0.67	1.00