A study was conducted on assemblies of various orthopteran species from distinct habitats in the Satoyama region, Kanazawa City, Ishikawa Prefecture, Japan, and a total of 50 distinct orthopteran species were registered. These species were represented by 10 families and were belonged to 17 subfamilies and 27 tribes. Results based on stereo-microscopic examination of the mandibular morphology and the analysis of gut contents suggested seven proposed feeding groups for these collected orthopteran species. Among the examined subfamilies, family Tettigoniidae proved to be the most diverse in mandibular structure and four feeding groups were assigned. This was followed by family Acrididae, which showed three feeding groups. Other families contained only single feeding group. It was noted that only five species, from family Acrididae, were graminivorous with their mandibles characterized by comparatively very short incisors and relatively wide molar regions. The analysis of gut contents of these five species proved to contain more than 80% monocotyledonous plant species. Predation and scavenging as feeding habits were also recorded in some orthopteran species.
Although adult feeding habits and food requirements are currently and reasonably well known for many coleopteran species, still some carabid species are with peculiar feeding guilds. Although many studies have shown a relationship between morphology of mandibles and feeding behavior in different taxal group, still many aspects concerning the feeding behavior of carabids are promising. An assemblage of carabid species was collected from Kakuma Campus grassland in Kanazawa City, Japan. These species were represented by five subfamilies and nine tribes where the highest number of tribes (3 tribes) was confined to subfamily Harpalinae. The collected carabid assemblage was subjected to mandibular analysis and being categorized into two main groups; carnivorous and omnivorous species. Homologies among mandibular characteristics and functional adaptations of the mandible were also proposed to explore how the interaction network of carabids can affect their behavior in different habitats.
Part of the book: Biodiversity of Ecosystems