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Suction duration and numbers of Araneae and Auchenorrhyncha collected in grassland when using an open-ended cylinder to define the sample area

Cherrill, A., Burkmar, H., Quenu, H. and Zentane, E. (2018) Suction duration and numbers of Araneae and Auchenorrhyncha collected in grassland when using an open-ended cylinder to define the sample area. Entomologica Fennica, 29 (3). pp. 105-111.

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Official URL: https://journal.fi/entomolfennica/article/view/772...

Abstract

Suction samplers are typically used with touch-down samples, where the nozzle is held stationary on the ground, or within an open-ended cylinder, where the nozzle is moved through the enclosed vegetation. With touch-down sampling, published estimates suggest that virtually all individuals and species of grassland invertebrate are captured within 3 s. Effects of suction duration on catch when sampling within a cylinder have rarely been investigated. Here, it was found that extrapolation from studies of touch-down sampling, based on the relative areas of the G-vac nozzle and the cylinder, can be used to guide minimum sampling durations for Auchenorrhyncha (leafhoppers and planthoppers) when using a G-vac. Additional time, however, may be necessary when sampling Araneae (spiders), probably because movement of the G-vac nozzle within the cylinder results in disturbance of the vegetation such that more specimens are made available to be captured than with touch-down sampling.

Item Type: Article
Divisions: Crop and Environment Sciences
Depositing User: Ms Kath Osborn
Date Deposited: 08 Jul 2019 12:55
Last Modified: 08 Jul 2019 12:55
URI: http://hau.collections.crest.ac.uk/id/eprint/17423

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