Multivariate analysis of abundance and distribution of fish species in coast of Ghana, West Africa

S. Amponsah, Anita Ameyaw, C. Asare
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Abstract

Marine fishes are currently experiencing population decline which has severe repercussions on food security, especially in fishing households. However, without assessing the distribution and abundance of these marine fishes, ensuring sustainable management will become impossible. Therefore, the study aimed at applying multivariate techniques to determine the biodiversity of fishes along the coast of Ahanta West, Ghana. Fish samples were collected daily through experimental fishing from November-December, 2011. Data obtained from the study were analyzed for ecological indices, species diversity, and community structure using PAST and PRIMER v6 software. From the results, Pteroscion peli (19.2%), Galeoides decadactylus (11.7%), and Brachydeuterus auritus (9.0%) were the dominant fishes. Multivariate analysis identified three main assemblages of fishes, at 18%. For the ecological indices, the species dominance index (SDI) ranged from 0.89 to 0.93, which indicated that the fish species were highly dominated by a few species. The Shannon Weiner index (SWI) and Species Richness index (SRI) spanned between 2.64 – 2.92 and 4.43 – 648 respectively, showing high diversity of fish species. It is concluded that the marine environment along the Ahanta West, Ghana is rich in fish species diversity, and hence, there is the need to regulate existing fishing operations for sustainable utilization and conservation of these commercially important fish species. Res. Agric., Livest. Fish.9(1): 57-59, April 2022
西非加纳海岸鱼类丰度及分布的多变量分析
目前,海洋鱼类的数量正在减少,这对粮食安全,特别是渔业家庭的粮食安全产生了严重影响。然而,如果不评估这些海洋鱼类的分布和丰富程度,就不可能确保可持续的管理。因此,本研究旨在应用多元技术来确定加纳Ahanta West海岸鱼类的生物多样性。2011年11 - 12月,通过实验捕捞每天采集鱼类样本。利用PAST和PRIMER v6软件对研究数据进行生态指标、物种多样性和群落结构分析。结果显示,优势鱼类为peloscion(19.2%)、Galeoides decadactylus(11.7%)和brachyde子宫auritus(9.0%)。多变量分析确定了三种主要的鱼类组合,占18%。生态指标方面,物种优势度指数(SDI)在0.89 ~ 0.93之间,表明鱼类处于少数种的高度优势状态。Shannon Weiner指数(SWI)和物种丰富度指数(SRI)分别在2.64 ~ 2.92和4.43 ~ 648之间,显示出鱼类的高度多样性。结论是,加纳西部阿汉塔沿岸的海洋环境具有丰富的鱼类多样性,因此,有必要管制现有的捕鱼作业,以便可持续地利用和养护这些商业上重要的鱼类。阿格利司》。,力所能及的。鱼类。9(1):57-59,2022年4月
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