...Matteo A. Negroni; Marah Stoldt; Marie Oster; Ann-Sophie Rupp; Barbara Feldmeyer; Susanne Foitzik ABSTRACT During the evolution of social insects, not only did life-history traits diverge, with queens becoming highly fecund and long lived compared with their sterile workers, but also individual...

... ), thermal limits ( T min and T max ) and thermal breadth ( T br ). In addition, we collated previously published estimates of TPCs for fecundity and egg-to-adult viability in D. melanogaster . We found that the descriptors of the TPCs varied across traits (egg-to-adult viability, SMR, activity and fecundity...

..., it is not entirely clear how it affects reproductive fitness. We, therefore, investigated how developmental temperature affects reproductive performance (early fecundity and egg-to-adult viability) of wild-caught Drosophila melanogaster . We tested competing hypotheses on the character of developmental thermal...

... for fecundity, and metabolism of juvenile hormone (JH), which acts as gonadotropin in adult insects. For this study, we used six D. melanogaster lineages carrying the nuclear background of interbred Bi90 lineage and cytoplasmic backgrounds with or without Wolbachia of different genotype variants. The w MelCS...

..., with the nutritional optima being identified at P:C 1:4 for lifespan (P+C 120 g l −1 ), 1:2 for egg-to-adult viability (120 g l −1 ), 1:1 for female body mass at adult eclosion (240 g l −1 ) and lifetime fecundity (360 g l −1 ), 2:1 for larval developmental rate (60 g l −1 ) and 8:1 for egg production rate (120 g l −1...

... significant sleep loss and lowered fecundity. This demonstration of a direct relationship between sleep and reproductive fitness indicates a strong driving force for the evolution of sleep. * Author for correspondence ( sheeba@jncasr.ac.in ) Competing interests The authors declare no competing...

...Keith G. Davies; Brian Zimmerman; Ed Dudley; Russell P. Newton; John E. Hart ABSTRACT Ambient exposure to a short synthetic peptide has enhanced fecundity (number of offspring) in invertebrates and vertebrates, ostensibly by disinhibiting reproduction. In separate experiments, nematodes...

... stress and defense responses to exogenous stressors. In order to rigorously examine correlations between pre-adult development time and other life history traits, we assayed pre-adult survivorship, starvation and desiccation resistance, body size and body weight, fecundity and adult lifespan in faster...

.... Here, we describe the temporal uptake of larval-derived carbon by the ovaries, and demonstrate the importance of larval fat-cell death in the maturation of the ovary and in fecundity. Larvae and adults were fed stable carbon isotopes to follow the acquisition of larval-derived carbon by the adult...

... ratio or low protein:high carbohydrate. Survivorship, larval development rate and adult body size were lowest on the carbohydrate-biased diet and similar on the protein-biased and equal-ratio diets. Fecundity increased with body size but did not otherwise differ between diets. Moths reared...

... =67.79, P <0.001). Accordingly, lifetime fecundity was significantly reduced (by ∼40%) in the group treated with 150 μg MK-801 as compared with the control group( F 2,104 =3.10, P =0.04; Table 1C ). Egg size was not significantly affected by MK-801 ( F 2,103 =0.54, P =0.59; Fig. 3B...

... the transient as well as fecundity and viability of flies held at constant 18°, 25° and 29°C. This population appears particularly heat tolerant as neither constant nor transient exposure to 29°C (usually a stressful temperature for this species) affected female fecundity or the viability of her progeny...

... and fecundity. Our approach was to mate 304 C57BL/6J mice and allow them to wean pups before measuring BMR by indirect calorimetry. We did not find an association between BMR and litter mass, size or pup mass at birth or weaning that could not be accounted for by the body mass of the dam. There was also...