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Vulnerability assessment of Lake Malawi’s ornamental fish resources to export ornamental trade
Fisheries Research ( IF 2.4 ) Pub Date : 2021-02-10 , DOI: 10.1016/j.fishres.2020.105869
Amulike V. Msukwa , Ian G. Cowx , Jonathan P. Harvey

Productivity Sustainability Analysis (PSA) was used to assess the vulnerability of 103 most targeted ornamental fish species of Lake Malawi to fishing for the export trade. The PSA was based on five productivity and four susceptibility attributes that are relevant to the ornamental fishes of Lake Malawi, and for which information was readily available from the scientific literature. The vulnerability scores ranged from 1.78 to 3.84 with a mean value of 2.49. Seven species (Aulonocara sp ‘walteri’, Lethrinops sp ‘red cap’, Aulonocara baenschi, Copadichromis azureus, Melanochromis chipokae, Placidochromis phenochilus and Protomelas sp ‘mbenji thick lips’) were classified in the high-vulnerability category with vulnerability scores ranging from 3.18 to 3.84. Twenty-five species were within the medium vulnerability category with scores between 2.64 and 2.96 while 71 species ranked as of low vulnerability scores ranging between 1.78 and 2.63. The vulnerability scores were positively correlated with IUCN conservation status (τb = 0.286, p = 0.001). Susceptibility scores had a stronger correlation with the IUCN risk assessment criteria (τb = 0.390, p < 0.001) compared to the productivity scores (τb = -0.023, p = 0.805). In addition, the susceptibility scores contributed more to the vulnerability scores for species ranked to be of high-vulnerability, which provides a potential scope for management interventions. The findings validate the use of the PSA for assessing freshwater ornamental fish species. Use of the PSA approach has an added advantage of being applicable for undescribed species which are difficult to assess using other vulnerability assessment approaches. The potential for promoting the export of low-vulnerability ornamental fish species; while prioritizing conservation of high-vulnerability species is evident, coupled with quantitative research to inform the development of precautionary management measures.



中文翻译:

马拉维湖观赏鱼资源用于出口观赏贸易的脆弱性评估

生产力可持续性分析(PSA)用于评估马拉维湖103种最具针对性的观赏鱼对出口贸易捕捞的脆弱性。PSA基于与马拉维湖观赏鱼有关的五种生产力和四种易感性属性,有关这些信息可从科学文献中轻松获得。漏洞分数在1.78到3.84之间,平均值为2.49。七种(Aulonocara sp'walteri',Lethrinops sp'red cap',Aulonocara baenschiCopadichromis azureusMelanochromis chipokaePlacidochromis phenochilusProtomelassp“ mbenji厚嘴唇”)被归类为高漏洞类别,漏洞评分从3.18到3.84。25个物种在中等脆弱性类别中,得分在2.64和2.96之间,而71个物种的脆弱性得分在1.78和2.63之间。脆弱性评分与自然保护联盟的保护状态呈正相关(τb= 0.286,p = 0.001)。与生产力得分(τb= -0.023,p = 0.805)相比,敏感性得分与IUCN风险评估标准(τb= 0.390,p <0.001)具有更强的相关性。此外,敏感性等级对高脆弱性物种的脆弱性得分贡献更大,这为管理干预措施提供了潜在的范围。这些发现证实了PSA在评估淡水观赏鱼种类中的用途。PSA方法的使用具有额外的优势,适用于难以描述的物种,这些物种很难使用其他脆弱性评估方法进行评估。促进低脆弱性观赏鱼出口的潜力;显然,优先保护高脆弱性物种是显而易见的,再加上定量研究可为预防管理措施的发展提供信息。

更新日期:2021-02-11
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