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巴西东北部一个重新造林的滨海平原栖息地中,丽斑麻蜥(Cnemidophorus ocellifer)(斯皮克斯,1825年)(美洲蜥蜴科)的食性、两性异形及成熟时的体型

Feeding habits, sexual dimorphism and size at maturity of the lizard Cnemidophorus ocellifer (Spix, 1825) (Teiidae) in a reforested restinga habitat in northeastern Brazil.

作者信息

Santana G G, Vasconcellos A, Gadelha Y E A, Vieira W L S, Almeida W O, Nóbrega R P, Alves R R N

机构信息

Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, João Pessoa, PB, Brazil.

出版信息

Braz J Biol. 2010 May;70(2):409-16. doi: 10.1590/s1519-69842010005000006. Epub 2010 Mar 19.

Abstract

The feeding habits, the sexual dimorphism in size and sexual maturity of the actively foraging lizard Cnemidophorusocellifer were analysed in an area of a reforested Restinga habitat located in the municipality of Mataraca, along the northern-most coast of Paraíba State, Brazil. Seventy-five specimens of C. ocellifer were examined (46 males and 29A females). Of this total, only 23 specimens had prey in their stomachs. The most frequent prey consumed items were orthopterans (50%), coleopterans (23.9%) and arachnids (10.9%); termites and insect larvae were less consumed (both with 2.2%). There were no significant differences observed between the numbers of prey consumed by either males or females. There were significant differences in SVL (snout-vent length) between the sexes, with males attaining larger SVL values. When the influence of SVL was removed from the analyses, sexual dimorphism in the form was still reflected in the head size of these lizards. Sexual maturity in females and males was attained with SVL of 42.2 and 49.0 mm respectively. Although no significant difference was observed between the SVL of the females and the number of eggs produced, there was a clear tendency for larger females to produce more eggs. The low structural complexity of the vegetation and the poor soil quality in the reforested restinga area examined does not furnish favourable habitat for insect and termite larvae, contributing to the marked differences in the diet of the population of C. ocellifer observed in the present study in relation to the diet of their conspecifics in undisturbed areas of restinga, cerrado and caatinga.

摘要

在巴西帕拉伊巴州最北部海岸马塔拉卡市一片重新造林的滨海沙质地植被区,对积极觅食的眼斑鞭尾蜥(Cnemidophorus ocellifer)的食性、体型上的两性异形以及性成熟情况进行了分析。共检查了75只眼斑鞭尾蜥标本(46只雄性和29只雌性)。在这总数中,只有23只标本胃里有猎物。最常捕食的猎物是直翅目昆虫(50%)、鞘翅目昆虫(23.9%)和蛛形纲动物(10.9%);白蚁和昆虫幼虫的捕食量较少(均为2.2%)。未观察到雄性和雌性所捕食猎物数量之间存在显著差异。两性之间的吻肛长度(SVL)存在显著差异,雄性的SVL值更大。当在分析中去除SVL的影响后,这些蜥蜴在形态上的两性异形仍体现在头部大小上。雌性和雄性分别在SVL达到42.2毫米和49.0毫米时达到性成熟。尽管未观察到雌性的SVL与产卵数量之间存在显著差异,但明显存在体型较大的雌性产更多卵的趋势。在所研究的重新造林的滨海沙质地植被区,植被结构复杂性低且土壤质量差,无法为昆虫和白蚁幼虫提供适宜的栖息地,这导致了本研究中观察到的眼斑鞭尾蜥种群饮食与未受干扰的滨海沙质地植被区、塞拉多和卡廷加地区的同种蜥蜴饮食存在显著差异。

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