Increased juvenile hormone levels after long-duration flight in the grasshopper, Melanoplus sanguinipes

Min, Kyung Jin; Jones, Nathan T.; Borst, David W.; Rankin, Mary Ann

doi:10.1016/j.jinsphys.2004.03.009

Cited by 39 publications

(38 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although we were unable to measure the JH titters in each species, we took care not to administrate high pharmacological JH doses to each damselfly. Thus, according to reports of JH titers in other insects (Orth et al 2003;Elekonich et al 2003;Panaitof et al 2004;Min et al 2004;Scott 2006;Trumbo and Robinson 2008), nanograms were administrated. A dose of 5 ng of metoprene diluted in 1 ll of acetone has been used successfully in C. virgo (see Contreras-Garduño et al 2009a).…”

Section: Effects Of Jha On Male Wing Pigmentation Fat Stores and Musmentioning

confidence: 99%

Juvenile hormone favors sexually-selected traits but impairs fat reserves and abdomen mass in males and females

et al. 2010

View full text Add to dashboard Cite

The physiological mechanism underlying resource allocation in sexual selection studies has been little studied. One candidate is hormones as these favor resource allocation to reproductive traits but impair survival due to a resource over-expenditure directed to the former traits. We have investigated whether a juvenile hormone analog (JHa, methoprene) administrated topically is involved in the resource allocation to wing pigmentation (an ornamental trait), fat reserves and flight muscle mass in both sexes of Calopteryx haemorrhoidalis and C. virgo. We also investigated the possible negative effect of such implementation on abdomen mass (an indirect measure of egg production) and field-based survival in adult males of C. haemorrhoidalis and C. splendens. We found that males and females treated with JHa, against a control group, developed higher wing pigmentation and showed reduced fat reserves but had no change in muscle mass. In females, JHa decreased abdominal weight (an indicator of fecundity) and in males, survival was impaired only in C. splendens. These results support the idea that JH induces resource allocation to wing pigmentation, a sexually selected trait in both sexes. Thus, this study suggests that the action of JH could be a mechanistic link between ornaments and physiological condition in both males and females.

show abstract

Section: Effects Of Jha On Male Wing Pigmentation Fat Stores and Musmentioning

confidence: 99%

Juvenile hormone favors sexually-selected traits but impairs fat reserves and abdomen mass in males and females

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Hexane extraction followed Min et al (2004b) with slight modification. Briefly, hemolymph samples were added immediately after collection to a glass tube with 0.5 ml acetonitrile containing methoprene or precocene II as internal standards; 0.5 ml of 0.9% NaCl was added, and the sample was extracted twice with 1 ml hexane.…”

Section: Hexane Extractionmentioning

confidence: 99%

“…Previous studies from this laboratory of the migratory and reproductive physiology of this species have shown that performance of long duration flight accelerates reproductive development and enhances reproductive success in this species (Rankin and Burchsted, 1992), an observation that runs counter to most traditional theory regarding the reproductive cost of migration. This is due at least in part to the fact that performance of long-duration flight stimulates two peaks in JH after flight that accelerate the onset of ovarian development (Min et al, 2004b). As part of a study comparing two populations of M. sanguinipes, we repeated our earlier JH titer determinations after long flight, but obtained anomalous results with the RIA.…”

Section: Introductionmentioning

confidence: 99%

Comparison of radioimmunoassay and liquid chromatography tandem mass spectrometry for determination of juvenile hormone titers

Chen

Linse

Taub-Montemayor

et al. 2007

Insect Biochemistry and Molecular Biology

Self Cite

View full text Add to dashboard Cite

“…Min et al 2004;Hanski et al 2006), but insects that walk or climb to disperse may not incur as large an energy cost during locomotion. I have previously found that disperser beetles were smaller and more energyefficient climbers, thus making it likely that their cost of dispersing would be lower still (Chapter 5).…”

Section: Cross-breeding: Sex Ratiomentioning

confidence: 99%

“…Indeed, many studies have found that there is a reproductive cost associated with having larger flight muscles or structures and being highly dispersive (Roff 1977;Mole & Zera 1993;Zera & Denno 1997;Gu et al 2006;Karlsson & Johansson 2008;Nespolo et al 2008;Saglam et al 2008;Khuhro et al 2014;David et al 2015). However, despite their being a physiological basis of energy partitioning between dispersal and reproduction, some insects are highly dispersive while still having equivalent or increased lifetime egg production, number of clutches, lower age at first reproduction, and mating advantages compared to residents (Lavie & Ritte 1978;Langellotto et al 2000;Min et al 2004;Hanski et al 2006;Saastamoinen 2007). Highly dispersive individuals that are also highly fecund, may compensate for the potential energy deficit incurred by exploiting resources that are available in the habitat that they disperse to (Hanski et al 2006;Burton et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Selecting for invasive tendencies: the evolution of morphological, physiological, and movement behaviour traits associated with dispersal

Arnold¹

View full text Add to dashboard Cite

Dispersal, defined as any movement of an individual over various spatial scales that may contribute to gene flow, is an essential component of species ecology. It provides a mechanism that allows organisms to track optimal environmental conditions, regulate population density and interactions with conspecifics, and colonise new areas. Dispersal ability varies widely among individuals, and this variation has been strongly linked to a suite of physiological, morphological, and behavioural traits that together constitute a dispersal syndrome. The evolution of dispersal-related traits can occur not only by natural selection, but also by spatial sorting, where individuals that have traits facilitating their dispersal accumulate at range edges and are limited proximally to mating with other dispersive individuals. The relationships among traits constituting the dispersal syndrome, their dynamics with age, and evolution under spatial selection on dispersal have not been comprehensively explored. Furthermore, integrating evolution into the study of dispersal is imperative to understand the mechanisms that select or constrain the evolution of dispersalrelated traits. The overall aim of this thesis was to investigate a suite of physiological, morphological, and movement behaviour traits associated with the dispersal syndrome using a model system: laboratory dispersal apparatuses and Tribolium castaneum (red flour beetle).The research presented in this thesis focused on the following traits: body size, locomotor apparatus size, metabolic rate, spontaneous activity, and movement behaviour in a maze (including speed, path length, displacement distance, and behavioural intermittence). The first specific aim was to determine how the onset of sexual maturity and age throughout early life affects dispersal-related traits (Chapter 2). I found that prior to sexual maturity, T. castaneum have low metabolic rate and moved significantly less than mature ones. The low energy expenditure was attributable to reduced energy demand and inactivity, which was hypothesised to be a protective mechanism while the cuticle is undergoing sclerotisation.The second specific aim was to determine the relationships among metabolic rate, body size, relative leg length and different movement behaviour traits (Chapter 3). A dominant axis of movement ability described variation in several movement traits and was positively related to relative leg length, but unrelated to body size or metabolic rate. A mechanistic relationship ii between stride length and movement ability is therefore likely. The data suggested that the dispersal syndrome may be more strongly tied to morphology rather than physiology.The third specific aim was to investigate the dispersal rate of T. castaneum through threepatch dispersal apparatuses to determine which design would be most effective for artificial selection on the basis of dispersal success (Chapter 4). The distance and slope of the tubing that connected between patches significantly affected dispersal rate, therefo...

show abstract

Increased juvenile hormone levels after long-duration flight in the grasshopper, Melanoplus sanguinipes

Cited by 39 publications

References 27 publications

Juvenile hormone favors sexually-selected traits but impairs fat reserves and abdomen mass in males and females

Juvenile hormone favors sexually-selected traits but impairs fat reserves and abdomen mass in males and females

Comparison of radioimmunoassay and liquid chromatography tandem mass spectrometry for determination of juvenile hormone titers

Selecting for invasive tendencies: the evolution of morphological, physiological, and movement behaviour traits associated with dispersal

Contact Info

Product

Resources

About