Diet Analysis of the Amur Sleeper (Perccottus glenii) from the Danube River Drainage Channel (Serbia)

IF 1.5 4区农林科学 Q3 FISHERIES

Turkish Journal of Fisheries and Aquatic Sciences Pub Date : 2023-07-31 DOI:10.4194/trjfas22854

V. Djikanović, S. Skorić, B. Mićković, Dušan Nikolić

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引用次数: 0

Abstract

The stomach content of 277 Amur sleeper individuals has been analyzed to present its feeding habits. Fish were sampled using electrofishing from July to November 2017 in the Danube River drainage channel near Veliko Gradište (Serbia). Fish age was estimated by otoliths examination. Ingested prey organisms were identified to the lowest reliable taxonomic level. The biotic indices: vacuity index (VI), frequency of occurrence (F), abundance (Cn), index of importance (PV), Shannon`s diversity index (H`), and equitability index (Eh) were calculated. A total of 18 prey categories and 1144 individual prey were identified in the fish diet, dominantly aquatic macroinvertebrates. There were no significant difference in diet composition between sampling months as well as 0+, 1+, and 2+ age groups (both 3+ and 4+ had one individual). Only eight individuals were found with empty intestines, thus VI was low (2.9). In average, each fish had 4.1 prey items in their intestines. For whole sample, H′ was 1.84 and Eh was 0.64. Trichoptera, Ephemeroptera, and Gastropoda were the most frequent, dominant, and abundant. The greatest diversity of prey items was recorded for fish sampled in October as well as for 2+ individuals, and the lowest for fish from August and 0+ individuals.

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多瑙河流域(塞尔维亚)阿穆尔河睡眠者的食性分析

本文对277例黑龙江睡眠者的胃内容物进行了分析，以了解其摄食习性。2017年7月至11月，在Veliko Gradište(塞尔维亚)附近的多瑙河流域进行了电钓取样。通过耳石检查估计鱼龄。摄食的猎物生物被鉴定到最低可靠的分类水平。计算了生物指数:真空指数(VI)、发生频率(F)、丰度(Cn)、重要性指数(PV)、Shannon多样性指数(H’)和公平性指数(Eh)。在鱼的食性中共鉴定出18种猎物和1144个个体，以水生大型无脊椎动物为主。在采样月份之间以及0+、1+和2+年龄组(3+和4+都有一个个体)的饮食组成没有显著差异。只有8人出现了空肠，因此指数很低(2.9)。每条鱼的肠道里平均有4.1个猎物。全样本H′= 1.84,Eh = 0.64。毛翅目、蜉蝣目和腹足目是最常见、优势和最丰富的昆虫。捕获物多样性以10月和2+个体最高，8月和0+个体最低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Turkish Journal of Fisheries and Aquatic Sciences FISHERIES-MARINE & FRESHWATER BIOLOGY

CiteScore

3.10

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Turkish Journal of Fisheries and Aquatic Sciences" (TrJFAS) is a refereed academic journal has been published by Central Fisheries Research Institute of Turkey and Japan International Cooperation Agency (JICA), and published in English. It aims to address research and needs of all working and studying within the many varied areas of fisheries and aquatic sciences. The Journal publishes English language original research papers, critical review articles, short communications and technical notes on applied or scientific research relevant to freshwater, brackish and marine environments. TrJFAS was published biannually (April & November) between 2001 and 2009. A great number of manuscripts have been submitted to the journal for review from acceptance of the SCI index. Thereby, the journal has been published quarterly (March, June, September and December) from 2010 to 2017. The journal will be published monthly in 2018.