Development of phenotypic differences in sensillum populations on the antennae of a grasshopper, Schistocerca americana

The development of diet‐induced phenotypic differences in numbers of sensilla on the antennae of the grasshopper Schistocerca americana was studied using the exuviae produced at each molt. This made it possible to follow changes within an individual insect. In the first instar, insects had similar n...

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Bibliographic Details
Published in:Journal of morphology (1931) 2002-11, Vol.254 (2), p.186-194
Main Author: Chapman, R.F.
Format: Article
Language:English
Subjects:
Analysis of Variance
Animals
antenna
development
Environment
exuviae
grasshopper
Grasshoppers - anatomy & histology
Grasshoppers - growth & development
Larva - anatomy & histology
Molting
Phenotype
phenotypic variation
Sense Organs - anatomy & histology
Sense Organs - growth & development
sensilla
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Summary:The development of diet‐induced phenotypic differences in numbers of sensilla on the antennae of the grasshopper Schistocerca americana was studied using the exuviae produced at each molt. This made it possible to follow changes within an individual insect. In the first instar, insects had similar numbers of four sensillum types: uniporous trichoid sensilla, coeloconic sensilla, and large and small multiporous basiconic sensilla. Rearing on lettuce resulted in sixth instars with greater numbers of three sensillum types than siblings reared on an artificial diet. The first statistically significant differences between treatments in numbers of trichoid sensilla and large basiconic sensilla occurred in the third and fourth instars, respectively. No major reductions in sensillum numbers occurred at any time and the phenotypic differences resulted from differences in the numbers added at each molt. J. Morphol. 254:186–194, 2002. © 2002 Wiley‐Liss, Inc.
ISSN:0362-2525
1097-4687
DOI:10.1002/jmor.10026