Inferring feeding habits of Carabidae (Coleoptera) larvae based on mandible morphology: Case studies of Lesticus magnus and Chlaenius costiger

IF 0.7 4区 农林科学 Q4 ENTOMOLOGY
Kôji Sasakawa
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引用次数: 0

Abstract

In the beetle family Carabidae, feeding habits are important life history traits that determine their role in ecosystems and suitability as bioindicators. However, they have not been elucidated for most species, especially in the larval stages. Using laboratory-rearing experiments, this study examined the larval feeding habits of two large carabid species: Lesticus magnus (tribe Pterostichini) and Chlaenius costiger (tribe Chlaeniini). Although previous studies failed to rear these larvae on insect larva diets, the mandible morphology of the first instars described in those studies, together with subsequently obtained knowledge of the relationship between mandible morphology and feeding habits in other carabid larvae, suggests that they are earthworm feeders. Rearing experiments with three types of animal diet (insect larvae, mixed snail and slug, and earthworm diets) showed that as expected, their larvae are earthworm feeders. In L. magnus, although the larvae accepted the mixed snail and slug diet and the earthworm diet, only larvae reared on the earthworm diet reached adulthood. In C. costiger, the larvae accepted only the earthworm diet and reached adulthood. This is the first report of earthworm feeding during the larval stage for the genus Lesticus (tribe Pterostichini) and tribe Chlaeniini. The importance of these results is discussed from ecological and evolutionary perspectives.

Abstract Image

基于下颌骨形态推断金龟子科(Coleoptera)幼虫的食性——以大鳞Lesticus magnus和Chlaenius costiger为例
在甲虫科中,摄食习性是重要的生活史特征,决定了其在生态系统中的作用和作为生物指标的适用性。然而,在大多数物种中,特别是在幼虫阶段,它们尚未被阐明。采用室内饲养实验,研究了两种大型蜈蚣的幼虫摄食习性:大蜈蚣(翼龙属)和大蜈蚣(翼龙属)。虽然之前的研究未能以昆虫幼虫为食来饲养这些幼虫,但这些研究中描述的一龄幼虫的下颌骨形态,以及随后获得的其他carabides幼虫下颌骨形态与摄食习性之间关系的知识,表明它们以蚯蚓为食。用昆虫幼虫、螺蛞蝓混合饲料和蚯蚓饲料三种动物饲料进行饲养实验,结果表明,幼虫以蚯蚓为食。钉螺幼虫虽然接受螺蛞蝓混合饲料和蚯蚓饲料,但只有以蚯蚓饲料饲养的幼虫才能成虫。在C. costiger,幼虫只接受蚯蚓的饮食,并达到成年。这是首次报道的蚯蚓在幼虫期摄食的Lesticus属(Pterostichini族)和Chlaeniini族。从生态学和进化的角度讨论了这些结果的重要性。
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来源期刊
Entomological Science
Entomological Science 生物-昆虫学
CiteScore
2.00
自引率
11.10%
发文量
30
审稿时长
6-12 weeks
期刊介绍: Entomological Science is the official English language journal of the Entomological Society of Japan. The Journal publishes original research papers and reviews from any entomological discipline or from directly allied field in ecology, behavioral biology, physiology, biochemistry, development, genetics, systematics, morphology, evolution and general entomology. Papers of applied entomology will be considered for publication if they significantly advance in the field of entomological science in the opinion of the Editors and Editorial Board.
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