𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Larval competition inDrosophila melanogaster: effects on development time

✍ Scribed by F. González-Candelas; J. L. Ménsua; A. Mova

Book ID
104624975
Publisher
Springer Netherlands
Year
1990
Tongue
English
Weight
736 KB
Volume
82
Category
Article
ISSN
0016-6707

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✦ Synopsis

The effects on development time of larval competition that is interrupted at different times are analyzed in an experiment with constant larval density and varying proportions of two competing strains. Interruption of competition is carried out by means of the overfeeding technique, which allows for the study of individuals that, after several days under competition stress, either complete their development in crowded conditions or migrate to a vial with fresh food where the rest of their development takes place. Results of mean development time and within-vial variance of development time show that individuals under strong competition stress can arrest their development retaining the capability to resume it, once they are exposed to fresh food. The effects of competition are observed sooner on development time than on viabilities, which is in agreement with Ohba's observations (Biol. J. Okayama Univ. 7: 87-125, 1961), but the observed effects are not always coincident for both fitness components.

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✍ A. Moya; F. González-Candelas; F. J. Ayala 📂 Article 📅 1986 🏛 Springer Netherlands 🌐 English ⚖ 543 KB

We have examined the effects of density and frequency in the larval competition of Drosophila melanogaster by measuring three fitness components: viability (V), mean development time (MDT) and a combination of these two (E). We have detected (contrary to most published results) non-linear effects of