Biological Aspects and Feeding Habits of Spinetail Devil Ray (Mobula mobular) landed in the Palabuhanratu Nusantara Fishing Port

Fahira Anggi Novyanti, S. Oktaviyani, M. R. Ismail, Yuniarti M.S., Alexander M. A. Khan
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Abstract

Optimal management of aquatic resources requires a good understanding of the biological aspects and other information related to these resources. This study was conducted to determine the biological aspects and feeding habits of Mobula mobular landed in the Palabuhanratu Nusantara Fishing Port. The research was conducted from September 2021 to May 2022. Data collected through a direct survey that included aspects of biology, stomach contents and information on fishing grounds. It was recorded that 21 individuals of M. mobular landed in the area during the study period. According to the Chi-Square test, the sex ratio between females and males is balanced with the growth pattern of M. mobular was negatively allometric. The male of M. mobular was generally found as immature individuals. The prey items identified in the stomachs belong to five groups: decapods, copepods, gastropods, Polychaeta, and others. Decapods were the most important prey (Index of Relative Importance 99,54%), while the other prey groups were only as complementary food. M. mobular is categorized as a plankton feeder. The fullness index value was 23.8%, while the vacuity index was 76.2% and categorized as relatively low fed. M. mobular is classified as an omnivorous animal that tends to be carnivorous with an animal preference with a trophic value of level 3.
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在帕拉布汉拉图努桑塔拉渔港上岸的刺尾魔鬼鱼的生物学特征和摄食习性
水生资源的最佳管理需要对与这些资源有关的生物方面和其他信息有很好的了解。本研究对帕拉布汉拉图努桑塔拉渔港的孟布拉(Mobula mobular)的生物学特征和摄食习性进行了研究。该研究于2021年9月至2022年5月进行。通过直接调查收集的数据包括生物学方面,胃内容物和渔场信息。在研究期间,有21只白腹支原体在该地区降落。经卡方检验,雌雄性别比平衡,小叶支原体呈负异速生长。雄蛾一般为未成熟的个体。在胃里发现的猎物属于五类:十足类、桡足类、腹足类、多毛类和其他。十足类是最重要的猎物(相对重要性指数为99,54%),其他猎物群仅作为辅食。M. mobular被归类为浮游生物捕食者。丰度指数为23.8%,真空指数为76.2%,属于相对低食动物,属于有食肉倾向的杂食性动物,营养值为3级。
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审稿时长
16 weeks
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