Biodiversity Science ›› 2016, Vol. 24 ›› Issue (2): 185-194.doi: 10.17520/biods.2015188

• Orginal Article • Previous Article     Next Article

Fish species diversity and its seasonal variations in the Chaozhou section of Hanjiang River, Guangdong Province

Xiaozhi Lin1, *(), Dongmei Li1, Huanzhang Liu2, Hongsheng Lin1, Shaorong Yang3, Hanjin Fan4, Rushu Wen5   

  1. 1 Hanshan Normal University, Chaozhou, Guangdong 521041
    2 Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072
    3 China Three Gorges Corporation, Chengdu 610041
    4 Shantou Chaoshi Senior Middle School, Shantou, Guangdong 515154
    5 Jiaying University, Meizhou, Guangdong 514015
  • Received:2015-07-03 Accepted:2015-09-27 Online:2016-03-03
  • Lin Xiaozhi E-mail:xiaozhilinok@sina.com

To understand the status of fish species diversity and seasonal variation in the Chaozhou section of Hanjiang River, a survey was carried out at five sample sites using fixed gillnets and cage nets from May 2012 to April 2013. In this study, 53 fish species, belonging to 8 orders, 19 families and 48 genera, were collected. Results indicated that Cypriniformes and Perciformes were the dominant groups with 27 and 11 species and accounting for 50.9% and 20.8% of the total species, respectively. Compared with earlier research, there were 13 new species recorded. The dominant species were Megalobrama terminalis, Microphysogobio fukiensis, Squaliobarbus curriculus and Cirrhinus molitorella, which accounted for 65.78% of the total samples. Shannon-Wiener index (H′), Pielou’s evenness index (E′) and Margalef richness index (D) were the highest in summer, followed by those in autumn, winter, and spring; Simpson index (D') was the highest in autumn, followed by those in summer, winter, and spring. A cluster analysis and non-metric multi-dimensional scaling ordination of Bray-Curtis similarity data based on species and abundance showed that the 12 months could be divided into 2 groups at a 38.23% similarity level, i.e. group I comprised six months of summer and autumn, while group II comprised six months of spring and winter, which is consistent with the variations in the diversity indices H', E, D and D'. These results indicated significant seasonal variations in fish resources among seasons. Water temperature and flow were suggested as the key drivers on fish resources in this area. Based on their appearance, 10 major fish species can be divided into two groups; Group A was characterized by small fish that appeared seasonally, while group B contained common species. In addition, it proposes that the habitat protection and the establishment of appropriate fishing regulations are the key measures to protect fish stocks in the Chaozhou section of Hanjiang River.

Key words: Hanjiang River, fish resources, community dynamics, new record, cluster analysis

Fig. 1

Fish sampling stations in Chaozhou section of Hajiang River"

Table 1

Seasonal variation of dominant and major species in Chaozhou section of Hanjiang River"

种类
Species
春季 Spring 夏季 Summer 秋季 Autumn 冬季 Winter
W% N% IRI W% N% IRI W% N% IRI W% N% IRI
Carassius auratus 2.50 0.51 267.80 0.84 0.80 109.11 2.40 2.01 394.93
Cirrhinus molitorella 1.14 0.23 121.37 19.17 12.06 2,676.60 11.19 10.36 2,154.82 2.88 2.36 469.26
翘嘴鲌 Culter alburnus 2.28 1.47 321.28 2.36 2.24 358.05 0.86 0.72 116.84
Cyprinus carpio 5.66 0.42 540.25 4.21 0.98 444.50 1.69 0.58 201.42 2.99 0.91 307.46
Hypophthalmichthys molitrix 3.37 0.07 153.01 2.81 0.19 128.56
露斯塔野鲮 Labeo rohita 6.53 1.66 454.96 3.34 0.75 323.01
Megalobrama skolkovii 3.25 0.26 234.51 2.81 0.72 151.20 4.15 1.55 380.25 2.95 0.98 269.16
广东鲂 Megalobrama terminalis 33.57 5.29 3,885.44 11.67 5.76 1,245.56 37.43 27.21 6,463.61 63.43 40.85 10,427.82
福建小鳔鮈 Microphysogobio fukiensis 7.31 58.08 6,539.52 0.75 24.37 528.75
飘鱼 Pseudolaubuca sinensis 2.37 2.35 367.22 3.03 2.66 119.92
银鮈 Squalidus argentatus 1.32 8.26 319.25 1.42 27.88 1,255.83 0.58 16.87 581.74
赤眼鳟 Squaliobarbus curriculus 9.49 2.47 1,062.61 32.28 26.30 5,021.27 18.84 22.60 4,144.31 3.01 3.20 588.04
黄尾鲴 Xenocypris davidi 20.58 2.64 2,321.77 1.87 0.75 150.04 6.02 3.16 628.27
大刺鳅 Mastacembelus armatus 1.21 4.71 507.71 0.27 1.55 121.80
莫桑比克罗非鱼 Oreochromis mossambicus 2.85 0.35 106.76
尼罗罗非鱼 Oreochromis niloticus 1.17 0.55 133.69 2.13 4.08 555.03
尖头塘鳢 Eleotris oxycephala 2.02 0.64 113.86
斑纹舌虾虎鱼 Glossogobius olivaceus 1.21 3.05 182.82
舌虾虎鱼 Glossogobiuss giuris 0.63 1.66 130.84
白边拟鲿 Pseudobagrus albomarginatus 5.83 1.54 421.64 9.97 3.89 1,077.89 1.46 0.50 113.87
瓦氏黄颡鱼 Pelteobagrus vachellii 0.42 0.78 119.64 0.43 2.49 249.91 0.27 2.30 228.01 0.66 4.98 445.39
子陵吻虾虎鱼 Rhinogobius giurinus 2.90 18.65 1,676.03

Table 2

Seasonal variations of fish community diversity indices in Chaozhou section of Hangjiang River"

春季
Spring
夏季
Summer
秋季
Autumn
冬季
Winter
全年
Annual
Simpson多样性指数 Simpson diversity index (D') 0.64 0.81 0.82 0.75 0.80
Shannon-Wiener指数 Shannon-Wiener diversity index (H') 2.15 3.29 3.12 2.86 2.16
Pielou均匀度指数 Pielou evenness index (E) 0.41 0.61 0.60 0.52 0.54
Margalef 丰富度指数 Margalef species richness index (D) 3.86 5.43 4.52 5.03 5.08
物种数 No. of species 37 42 37 45 53

Fig. 2

Dendrogram of cluster analysis (left) and non-metric multidimensional scaling ordination plot (right) of fish communities (based on abundance) obtained from Chaozhou section of the Hanjiang River between May 2012 and April 2013. Stress for the NMDS ordination = 0.06."

Table 3

The indicator species contributing to average similarity (≥ 5%) within communities and dissimilarity between communities from SIMPER analysis"

种类
Species
平均相似性 Average similarity 组I和组II间的平均差异
Average dissimilarity between I and II
I II
Cirrhinus molitorella 12.5
翘嘴鲌 Culter alburnus 5.37
广东鲂 Megalobrama terminalis 10.22 15.87 8.95
福建小鳔鮈 Microphysogobio fukiensis 23.90 22.16
银鮈 Squalidus argentatus 5.62 6.94
赤眼鳟 Squaliobarbus curriculus 14.51 6.66
黄尾鲴 Xenocypris davidi 7.81 5.43
瓦氏黄颡鱼 Pelteobagrus vachellii 5.63 5.21
白边拟鲿 Pseudobagrus albomarginatus 5.10
大刺鳅 Mastacembelus armatus 6.35
斑纹舌虾虎鱼 Glossogobius olivaceus 5.19
子陵吻虾虎鱼 Rhinogobius giurinus 5.56 8.41
贡献率合计 Total of contribution 70.49 65.01 51.89
组内相似性 Average similarity 55.52 60.88 60.53

Fig. 3

Dendrogram of cluster analysis (left) and non-metric multidimensional scaling ordination plot (right) based on the appearance numbers of the 10 dominant fish species (quantity percentage more than 1%) obtained from Chaozhou section of the Hanjiang River between May 2012 and April 2013. Stress for the NMDS ordination = 0.1."

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