Methods of Marking Insects, with Especial Reference to Orthoptera (Sens. Lat.)2
| Autor: | S. K. Gangwere, F. C. Evans, W. Chavin |
|---|---|
| Rok vydání: | 1964 |
| Předmět: | |
| Zdroj: | Annals of the Entomological Society of America. 57:662-669 |
| ISSN: | 1938-2901 0013-8746 |
| DOI: | 10.1093/aesa/57.6.662 |
| Popis: | Radioactive and nonradioactive methods used in the past for marking insects, and their applicability to orthopterous insects (sens. lat.), are evaluated on the basis of experimentation, prior field and laboratory experience, and critical analysis of pertinent literature. Radioactive methods based on external application of the isotope are found unsatisfactory for use on Orthoptera; but internal application by ingestion, by surgical insertion, and especially by injection, are suitable for this group of insects, though the ingestion method is subject to several limitations. The nonradioactive methods, grouped into 13 broad categories, are virtually all unsatisfactory for Orthoptera. Fluorescent materials (for nocturnal species) and various kinds of paints indicate some promise, but their applications are limited. One method, the amputation of tegmina, is useful, especially in combination with the new “notch technique.” This latter consists of the removal, with fine iris scissors, of V-shaped portions of exoskeleton from the fore, hind, and lateral margins of the pronotum. Various assortments of these notches, in combination with half or full amputation of tegmina, yield a large number of distinctive marks which are readily applied and interpreted in the field, easily supplemented with paint, and reasonably persistent through at least the later life stages; yet they do no apparent harm to the tagged insects. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|