Uncommon Diet of the Toad Rhinella marina (Anura: Bufonidae) in a Rural Zone of the Amazon Forest in Brazil

IF 0.6 4区生物学 Q4 ZOOLOGY

Current Herpetology Pub Date : 2023-08-25 DOI:10.5358/hsj.42.136

B. S. Sant’Anna, Rougles Pereira Braga

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Abstract

Abstract: The aim of this study was to investigate the diet of Rhinella marina by comparing the availability of food in its environment with its actual diet, and verify whether there is a relationship between the size and volume of its prey and the size of the toad and the width of its mouth. A total of 43 toads (95.55%) presented food items in the stomach. In general, R. marina feeds on the most abundant items in the environment with a niche amplitude of B=0.055. Hymenoptera was the most representative prey numerically. On the other hand, Diplopoda was the most representative prey in volume and frequency. Considering the food importance index (Ix), Diplopoda (Ix=0.47) was the most important part of the diet of R. marina. The relationships between the biometric characteristics of R. marina and its prey are significant with a low coefficient of determination. This result demonstrates that larger individuals predate smaller and lower volume prey, such as ants, and on large prey such as Diplopoda. In general, the diet of R. marina is specialized and is composed of arthropods that occur in greater abundance in nature, but mainly of Diplopoda and Hymenoptera, without selectivity regarding the size of the prey.

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在巴西亚马逊森林的农村地区，蟾蜍的不寻常饮食(无尾目:蟾蜍科)

摘要：本研究的目的是通过比较Rhinella marina环境中食物的可获得性和实际饮食来调查其饮食，并验证其猎物的大小和体积与蟾蜍的大小和嘴巴宽度之间是否存在关系。共有43只蟾蜍（95.55%）在胃里进食。一般来说，R.marina以环境中最丰富的物种为食，生态位幅度为B=0.055。膜翅目是数量上最具代表性的猎物。另一方面，双足目在数量和频率上是最具代表性的猎物。从食物重要性指数（Ix）来看，Diplopoda（Ix=0.47）是卤虫日粮中最重要的部分。码头R.marina及其猎物的生物特征之间的关系显著，决定系数较低。这一结果表明，体型较大的个体捕食体积较小、体积较小的猎物，如蚂蚁，以及大型猎物，如双足目。一般来说，R.marina的饮食是专门的，由自然界中数量较多的节肢动物组成，但主要是双足目和膜翅目，对猎物的大小没有选择性。

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

Current Herpetology Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

1.20

自引率

14.30%

发文量

期刊介绍： Current Herpetology publishes original research articles on amphibians and reptiles. It is the official journal of the Herpetological Society of Japan and is a continuation of Acta Herpetologica Japonica (1964–1971) and Japanese Journal of Herpetology (1972-1999).