Biodiversity Science ›› 2019, Vol. 27 ›› Issue (7): 787-795.doi: 10.17520/biods.2019098

• Original Papers • Previous Article     Next Article

Spring and autumn shrimp and crab biodiversity in the east Nanji Islands

Sun Beibei, Yu Cungen(), Liu Hui, Yan Wenchao, Zhang Wenjun, Dai Dongxu   

  1. Fishery College, Zhejiang Ocean University, Zhoushan, Zhejiang 316022
  • Received:2019-03-24 Accepted:2019-05-24 Online:2019-08-20
  • Yu Cungen E-mail:cgyu@zjou.edu.cn

We studied the shrimp and crab community and species biodiversity by performing a survey of the bottom-trawling fishery resources in the eastern Nanji Islands National Marine Nature Reserve in November 2017 and May 2018. The results indicated that: (1) A total of 30 shrimp and crab species were identified, including 16 shrimp species belonging to 12 genera in 6 families of one order, and 14 crab species belonging to 6 genera in 5 families of one order. (2) The number of shrimp and crab species was higher in autumn than in spring, and there were gradually more species as we traveled southward across the survey area in both seasons. (3) Dominant species in the spring were Portunus trituberculatus, Charybdis bimaculata, Alpheus juponicus, Parapenaeopsis tenella and Charybdis japonica. Dominant species in the autumn were Portunus trituberculatus, Charybdis bimaculata and Charybdis japonica. There were no dominant shrimp species in the autumn. (4) The Shannon-Wiener diversity index and the Pielou’s evenness index were higher in the spring than in the autumn. The species richness index was much higher in the autumn than in the spring. (5) According to hierarchical cluster and non-metric multidimensional scaling (nMDS) analyses, shrimp and crabs can be divided into three communities. (6) The abundance-biomass comparison curve (ABC curve) showed that the shrimp and crab communities were stable and undisturbed.

Key words: shrimp and crab, biodiversity, community structure, the east of Nanji Islands

Fig. 1

Distribution of shrimp and crab species in the survey area of east Nanji Islands"

Table 1

Species list of shrimp and crab in the survey area of east Nanji Islands"

种名
Species
春季
Spring
秋季
Autumn
种名
Species
春季
Spring
秋季
Autumn
凡纳滨对虾 Litopenaeus vannamei 巨指长臂虾 Palaemon macrodactylus
周氏新对虾 Metapenaeus joyneri 绒毛细足蟹 Raphidopus ciliatus
刀额新对虾 Metapenaeus ensis 阿氏强蟹 Eucrata alcocki
细巧仿对虾 Parapenaeopsis tenella 隆线强蟹 Eucrate crenata
哈氏仿对虾 Parapenaeopsis hardwickii 三疣梭子蟹 Portunus trituberculatus
斑节对虾 Penaeus monodon 红星梭子蟹 Portunus sanguinolentus
鹰爪虾 Trachypenaeus curvirostris 矛形梭子蟹 Portunus hastatoides
中华管鞭虾 Solenocera crassicornis 银光梭子蟹 Portunus argentatus
中国毛虾 Acetes chinensis 纤手梭子蟹 Portunus gracilimanus
鲜明鼓虾 Alpheus distinguendus 日本蟳 Charybdis japonica
日本鼓虾 Alpheus juponicus 锈斑蟳 Charybdis feriatus
长额拟鞭腕虾 Exhippolysmata ensirostris 变态鲟 Charybdis variegata
红条鞭腕虾 Lysmata vittata 双斑蟳 Charybdis bimaculata
脊尾白虾 Exopalaemon carinicauda 肉球近方蟹 Hemigrapsus sanguineus
葛氏长臂虾 Palaemon gravieri 豆形短眼蟹 Xenophthalmus pinnotheroides

Table 2

The seasonal variation of main shrimp and crab species index of relative importance in the survey area of east Nanji Islands"

种名
Species
春季
Spring
秋季
Autumn
葛氏长臂虾 Palaemon gravieri 227.9 981
哈氏仿对虾 Parapenaeopsis hardwickii 35.3 388.7
细巧仿对虾 Parapenaeopsis tenella 1,215.6 297.9
日本鼓虾 Alpheus juponicus 1,360.9 107.3
中国毛虾 Acetes chinensis - 125.1
中华管鞭虾 Solenocera crassicornis 66.5 678.4
周氏新对虾 Metapenaeus joyneri - 195.9
隆线强蟹 Eucrate crenata 592.8 161.4
日本蟳 Charybdis japonica 1,133.7 1,156
三疣梭子蟹 Portunus trituberculatus 4,532.8 1,2198.3
双斑蟳 Charybdis bimaculata 2,012.1 2,652.4

Table 3

Biodiversity indices of shrimp and crab species in the two seasons in the survey area of east Nanji Islands (mean ± SD)"

季节 Season 丰富度指数 Margalef richness index 多样性指数 Shannon-Wiener diversity index 均匀度指数 Pielou’s evenness index
Xˉ ± SD Maximum Minimum Xˉ ± SD Maximum Minimum Xˉ ± SD Maximum Minimum
春季 Spring 0.87 ± 0.32 1.30 0 1.11 ± 0.73 2.22 0 0.59 ± 0.21 0.87 0
秋季 Autumn 1.49 ± 0.24 1.80 0.94 1.06 ± 0.32 1.66 0.67 0.27 ± 0.07 0.39 0.16

Fig. 2

The seasonal variation of Bray-Curtis cluster and non-metric multidimensional scaling (nMDS) analysis of shrimp and crab species"

Fig. 3

The abundance-biomass comparison curves (ABC curves) of shrimp and crab species in the survey area of east Nanji Islands"

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