10.5061/DRYAD.F82NS
Jensen, Kim
North Carolina State University
Schal, Coby
North Carolina State University
Silverman, Jules
North Carolina State University
Data from: Adaptive contraction of diet breadth affects sexual maturation
and specific nutrient consumption in an extreme generalist omnivore
Dryad
dataset
2015
deterrence
glucose aversion
oocyte development
protein
fructose
Life History Evolution
Blattella germanica
geometric framework
2015-03-11T17:14:53Z
2015-03-11T17:14:53Z
en
https://doi.org/10.1111/jeb.12617
123904 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Animals balance their intake of specific nutrients, but little is known
about how they do so when foraging in an environment with toxic resources
and whether toxic foods promote adaptations that affect life history
traits. In German cockroach (Blattella germanica) populations, glucose
aversion has evolved in response to glucose-containing insecticidal baits.
We restricted newly eclosed glucose averse (GA) and wild type (WT) female
cockroaches to nutritionally defined diets varying in
protein-to-carbohydrate (P:C) ratio (3:1, 1:1, or 1:3) or gave them free
choice of the 3:1 and 1:3 diets, with either glucose or fructose as the
sole carbohydrate source. We measured consumption of each diet over six
days and then dissected the females to measure the length of basal oocytes
in their ovaries. Our results showed significantly lower consumption by GA
compared to WT cockroaches when restricted to glucose-containing diets,
but also lower fructose intake by GA compared to WT cockroaches when
restricted to high fructose diets or given choice of fructose-containing
diets. Protein intake was regulated tightly regardless of carbohydrate
intake, except by GA cockroaches restricted to glucose-containing diets.
Oocyte growth was completely suppressed in GA females restricted to
glucose-containing diets, but also significantly slower in GA than in WT
females restricted to fructose-containing diets. Our findings suggest that
GA cockroaches have adapted to reduced diet breadth through endocrine
adjustments which reduce requirements for energetic fuels. Our study
illustrates how an evolutionary change in the chemosensory system may
affect the evolution of other traits that govern animal life histories.
Data - Sexual maturation and specific nutrient consumption in female
glucose averse and wild type German cockroachesStartmess, dietary intake,
dry mass intake, protein intake, carbohydrate intake, and average oocyte
length for the female glucose averse and wild type German cockroaches when
sexually maturing on diets differing in protein to carbohydrate ratio and
carbohydrate source (glucose or fructose).Data - Sexual maturation and
specific nutrient consumption.xls