Stable isotopes reveal dietary divergence between dispersal phenotypes in Tetrix subulata pygmy grasshoppers (Orthoptera: Tetrigidae)

Title:

Stable isotopes reveal dietary divergence between dispersal phenotypes in Tetrix subulata pygmy grasshoppers (Orthoptera: Tetrigidae)

Creator:

Karpestam, Einat and Forsman, Anders

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:d603468f-3b02-4f97-90c1-42aa1b926d68
uuid:d603468f-3b02-4f97-90c1-42aa1b926d68

Subject:

Zoologie, zoologie, entomologie, Orthoptera, dietary divergence, dispersal capacity, niche partitioning, pygmy grasshopper, stable isotopes, Tetrix subulata, wing dimorphism, 2, and 59

Type:

article, články, model:article, and TEXT

Description:

In some species of insects, individuals with fully developed wings and capable of flying coexist with flightless individuals that lack functional wings. Their diets may differ if long-winged individuals are more mobile and therefore likely to be better at finding and utilizing high quality food resources, or if they have different food preferences or physiological requirements. Despite its potential importance, differences in the diet of dispersal phenotypes have not been unequivocally demonstrated under natural conditions. To test for dietary divergence, we compared natural abundances of carbon and nitrogen stable isotope ratios (d13C and d15N) in long- and short-winged free ranging Tetrix subulata pygmy grasshoppers collected as adults from two natural populations. Overall, this comparison of stable isotopes indicated long-term differences in the diet of the two wing morphs in both populations, but not between males and females of the same morph. We conclude that it is likely that the dietary niches of the long winged and flightless individuals differ under natural conditions. This may reduce intra-specific competition, offset the expected trade-off between flight capacity and reproduction and promote ecological speciation. Address, Einat Karpestam, Anders Forsman., and Obsahuje seznam literatury

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

European Journal of Entomology | 2013 Volume:110 | Number:1

Harvested from:

CDK

Metadata only:

false