Larval foraging behavior in isofemale lines of Drosophila melanogaster and D. pseudoobscura

Bauer, Sharon J.; Sokolowski, Marla B.

doi:10.1093/oxfordjournals.jhered.a109887

Cited by 56 publications

(30 citation statements)

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“…These findings are in agreement with those of Bauer and Sokolowski (1984) Results of these studies can provide the framework for further molecular, physiological, anatomical and behavioural characterisation of abnormalities in these mutants (Hall, 1985). The utility of such work is obvious from a mechanistic viewpoint although the relevance of laboratory population studies to natural populations is often questioned.…”

supporting

confidence: 88%

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Heredity of rover/sitter: Alternative foraging strategies of Drosophila melanogaster larvae

1987

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The heredity of rover/sitter, a naturally occurring polymorphism in the locomotory component of Drosophila melanogaster third instar larval foraging behaviour was analysed by comparing 16 reciprocal crosses made using isogenjc rover and sitter parental strains. Results from both male and female data sets indicated that rover/sitter differences have an autosomal basis, with rover showing complete dominance over sitter. The Y-chromosome, permanent cytoplasmic factors, transient maternal factors and interactions between them made no significant contributions to rover/sitter inheritance. A minor X-chromosome effect was observed in the female data. Rover/sitter ratios in both males and females of the 16 reciprocal crosses were not significantly different from those expected assuming a one gene, complete dominance model of autosomal inheritance.

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supporting

confidence: 88%

“…Previous studies using chromosomal analyses of laboratory strains (Sokolowski, 1980) and naturally derived strains (Bauer and Sokolowski, 1985) completely dominant over sitter (Bauer and Sokolowski, 1984 …”

Section: Melanogastermentioning

confidence: 99%

Heredity of rover/sitter: Alternative foraging strategies of Drosophila melanogaster larvae

1987

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“…The for gene does not have pleiotropic effects on these traits, although phenotypic correlations between larval path length and pupation behavior have been found in natural populations (51). Pupation height and larval feeding rate are polygenic characters influenced by many genes with additive effects on the major autosomes in D. melanogaster (23,(52)(53)(54)(55). From the perspective of larval fitness, feeding and moving are two of the most important behaviors performed in the larval period.…”

Section: Discussionmentioning

confidence: 99%

Evolution of foraging behavior inDrosophilaby density-dependent selection

Sokolowski

Pereira²,

Hughes³

1997

Proc. Natl. Acad. Sci. U.S.A.

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212

166

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One of the rare examples of a single major gene underlying a naturally occurring behavioral polymorphism is the foraging locus of Drosophila melanogaster. Larvae with the rover allele, for R , have significantly longer foraging path lengths on a yeast paste than do those homozygous for the sitter allele, for s . These variants do not differ in general activity in the absence of food. The evolutionary significance of this polymorphism is not as yet understood. Here we examine the effect of high and low animal rearing densities on the larval foraging path-length phenotype and show that density-dependent natural selection produces changes in this trait. In three unrelated base populations the long path (rover) phenotype was selected for under high-density rearing conditions, whereas the short path (sitter) phenotype was selected for under low-density conditions. Genetic crosses suggested that these changes resulted from alterations in the frequency of the for s allele in the low-density-selected lines. Further experiments showed that density-dependent selection during the larval stage rather than the adult stage of development was sufficient to explain these results. Densitydependent mechanisms may be sufficient to maintain variation in rover and sitter behavior in laboratory populations.Studies of population dynamics have for the most part mistakenly considered the behavior of organisms within a population to be homogeneous (1). However, individual differences in behavior are common and have consequences for the ecology and evolution of populations. A special case of individual differences is behavioral polymorphism, where individuals within a population can be categorized into morphs (phenotypes or strategists) according to their behavior(s). When the polymorphism has a heritable component, the relative selective advantages of the morphs under different environmental conditions can be measured (2). One condition, population density, varies over time and space and plays a significant role in the evolution of characteristics within populations (3). Population density affects a number of processes, for example, predator-prey (4) and parasite-host interactions (5), the spread of disease (6), competition (7), population regulation (8), and territoriality (9). There have been many theoretical studies of density-dependent selection, including those that model its effect on competitive ability (10-13). However, empirical studies that address whether behavioral polymorphisms affect fitness in a density-dependent manner are rare. The fruit fly Drosophila melanogaster is one of the few systems in which we are beginning to have a detailed empirical understanding of density-dependent selection (14-22). It is an ideal model system to study how a genetically characterized polymorphism in behavior responds to density-dependent selection.The rover͞sitter polymorphism in D. melanogaster is a model system that has been used to address both the mechanistic and evolutionary significance of behavioral phenotypes. The locomotio...

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“…Since our scores are between 40 and 70 in only 1 min, it is clear that all our lines display the rover behaviour, although this result must be taken with caution as our substrate differs from that of Sokolowski in composition and density. However, Bauer and Sokolowski (1984) state that classification of larvae into only two mobility classes (rover/sitter) is an oversimplification that does not correspond with the mobility scores found in natural populations.…”

Section: Methodsmentioning

confidence: 96%

Analysis of larval behaviours underlying the pupation height phenotype in Drosophila simulans and D melanogaster

Casares¹,

Carracedo²,

García-Florez³

1997

Genet. Sel. Evol.

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Larval foraging behavior in isofemale lines of Drosophila melanogaster and D. pseudoobscura

Cited by 56 publications

References 4 publications

Heredity of rover/sitter: Alternative foraging strategies of Drosophila melanogaster larvae

Heredity of rover/sitter: Alternative foraging strategies of Drosophila melanogaster larvae

Evolution of foraging behavior inDrosophilaby density-dependent selection

Analysis of larval behaviours underlying the pupation height phenotype in Drosophila simulans and D melanogaster

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