Resource Status of Coilia nasus in Poyang Lake and Preliminary Estimation of Its Environmental Capacity Under Extremely Low Water Level

doi:10.11924/j.issn.1000-6850.casb2024-0777

Abstract

Abstract:

In order to conduct a dynamic analysis of the fishery resources in Poyang Lake, a study on the resource status of Coilia nasus and its environmental carrying capacity under extreme low water levels was carried out. Based on the fishery resource survey data, the length-based Bayesian biomass estimation method was used to obtain the relevant parameters of Coilia nasus population, and the Ecopath model was applied to estimate its environmental carrying capacity under extreme low water levels. The results showed that the average L∞ of Coilia nasus in Poyang Lake was 374 (368-381) mm; the resource status index E (F/Z) was 0.067, far less than 0.5; the ratio of current biomass to original biomass (B/B0) was 0.89 (0.225-2.6), which was greater than 0.5; from 2018 to 2022, L∞ and B/B0 showed an upward trend, while the ratio of fishing mortality to natural mortality (F/M) showed a downward trend, indicating that the resources of Coilia nasus showed a recovery trend after the fishing ban. The Ecopath model revealed that environmental carrying capacity of Coilia nasus in Poyang Lake was 5.03 t/km² (approximately 1136.78 t), while its current biomass was 2.83 t/km² (approximately 639.58 t). Currently, the overall resources of Coilia nasus in Poyang Lake are in an undeveloped state. The environmental carrying capacity has restricted the population growth of Coilia nasus to a certain extent, but there is still a large growth space for its population. The results of this study provide a scientific basis for the sustainable management of Coilia nasus resources and the protection of the entire lake ecosystem in Poyang Lake.

Key words: Coilia nasus, fisheries resources, extremely low water level, environmental capacity, Poyang Lake

WU Bin, ZHANG Haixin, WU Zijun, YU Jianfang, QUE Xiangyao, HOU Mingyong, ZHANG Yanping. Resource Status of Coilia nasus in Poyang Lake and Preliminary Estimation of Its Environmental Capacity Under Extremely Low Water Level[J]. Chinese Agricultural Science Bulletin, 2025, 41(23): 155-164.

Figures/Tables 14

References 30

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年份	样本量/尾	调整系数
2018	186	3.29(612/186)
2019	134	4.57(612/134)
2020	124	4.94(612/124)
2021	352	1.74(612/352)
2022	612	1.0(612/612)

年份	样本量/尾	调整系数
2018	186	3.29(612/186)
2019	134	4.57(612/134)
2020	124	4.94(612/124)
2021	352	1.74(612/352)
2022	612	1.0(612/612)

监测点位	监测天数/d		监测频次/次		纬度/°N	经度/°E	情况说明
监测点位	繁殖期	索饵期	繁殖期	索饵期	纬度/°N	经度/°E	情况说明
多宝	6	6	5	5	29.370993	116.062188	3个断面
黄金咀	6	6	5	5	29.202333	116.279811	3个断面
棠荫	6	6	5	5	29.008811	116.376328	3个断面
共青城	6	6	5	5	29.212155	115.848885	3个断面
瑞洪	6	6	5	5	28.802412	116.359977	3个断面
康山	6	6	5	5	28.923734	116.423149	3个断面
鄱阳	6	6	5	5	29.014235	116.464494	3个断面
南矶	6	6	5	5	28.972643	116.375867	3个断面
朱港	6	6	5	5	28.938195	116.203637	3个断面
三里	6	6	5	5	28.709526	116.346492	3个断面
程家池	6	6	5	5	28.821120	116.289076	3个断面
幽兰	6	6	5	5	28.565979	116.188391	3个断面

监测点位	监测天数/d		监测频次/次		纬度/°N	经度/°E	情况说明
监测点位	繁殖期	索饵期	繁殖期	索饵期	纬度/°N	经度/°E	情况说明
多宝	6	6	5	5	29.370993	116.062188	3个断面
黄金咀	6	6	5	5	29.202333	116.279811	3个断面
棠荫	6	6	5	5	29.008811	116.376328	3个断面
共青城	6	6	5	5	29.212155	115.848885	3个断面
瑞洪	6	6	5	5	28.802412	116.359977	3个断面
康山	6	6	5	5	28.923734	116.423149	3个断面
鄱阳	6	6	5	5	29.014235	116.464494	3个断面
南矶	6	6	5	5	28.972643	116.375867	3个断面
朱港	6	6	5	5	28.938195	116.203637	3个断面
三里	6	6	5	5	28.709526	116.346492	3个断面
程家池	6	6	5	5	28.821120	116.289076	3个断面
幽兰	6	6	5	5	28.565979	116.188391	3个断面

编号	功能组	物种组成
1	长江江豚	长江江豚(Neophocaena asiaeorientalis)
2	凶猛型肉食性鱼类	鳜(Siniperca chuatsi)、大眼鳜(S.kneri)、南方鲇(Silurus soldatovi)、鲇(S.asotus)、鳡(Elopichthys bambusa)、翘嘴鲌(Erythroculter ilisaeformis)、蒙古鲌(E.mongolicus)、达氏鲌、红鳍原鲌(Cultrichthys Erythropterus)、乌鳢(Channa argus)等10种鱼类
3	短颌鲚	短颌鲚
4	长颌鲚	长颌鲚(C.ectenes)
5	其他肉食性鱼类	光泽黄颡鱼(Pelteobagrus nitidus)、瓦氏黄颡鱼(P.vachellii)、长须黄颡鱼(P.eupogon)、黄颡鱼(P.fulvidraco)、青鱼(Mylopharyngodon piceus)、粗唇鮠(Leiocassis crassirostris)、长臀拟鲿(Pseudobagrus analis)、圆尾拟鲿(P.tenuis)、乌苏拟鲿(P.ussuriensis)、白边拟鲿(P.albomarginatus)、杂交鲟、陈氏新银鱼(Neosalanx.tangkahkeii)、鳗鲡(Anguilla japonica)、花䱻(Hemibarbus maculatus)等14种鱼类
6	鲤	鲤(Cyprinus carpio)
7	鲫	鲫(Carassius auratus)
8	草食性鱼类	草鱼、鳊(Parabramis pekinensis)、团头鲂(Megalobrama amblvcephaia)等4种鱼类
9	鲢	鲢(Hypophthalmichthys molitrix)
10	鳙	鳙(Aristichys nobilis)
11	杂食性鱼类	贝氏䱗(Hemiculter bleekeri)、䱗(H.leucisculus)、鲂(Megalobrama terminalis)、黄尾鲴(Xenocypris davidi)、似刺鳊鮈(Paracanthobrama guichenoti)等5种鱼类
12	其他杂食性鱼类	泥鳅(Misgurnus anguillicaudatus)、黄鳝(Monopterus albus)、武昌副沙鳅(Parabotia banarescui)、间下鱵(Hyporhamphus intermedius)、赤眼鳟(Ctenopharyngodon idellus)等31种鱼类
13	虾蟹类	虾蟹类(Shrimps and crabs)
14	底栖动物	底栖动物(Benthic animals)
15	浮游动物	浮游动物(Zooplankton)
16	浮游植物	浮游植物(Phytoplankton)
17	水生植物	高等植物(Plants)
18	碎屑	腐烂的动植物等碎屑(Detritus)