Redressing the sex imbalance in knowledge of vector biology

Ferguson, Heather M.; John, Bernadette; Ng’habi, Kija; Knols, Bart G. J.

doi:10.1016/j.tree.2005.02.003

Cited by 70 publications

(64 citation statements)

References 72 publications

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“…Equally as important may be behavioral or genetic factors that alter the relative performance of these phenotypes in nature, independently of the base differences in energetic provisioning reported here. Previous control efforts based on releasing laboratory-reared males suggest these behavioral factors would give an advantage to field males (Benedict and Robinson, 2003;Ferguson et al, 2005), a similar conclusion to what we predict from physiology. Clearly current insect rearing protocols need to be improved to enhance the quality of males produced, to the point where they at least match, if not exceed, the body size and energetic make-up of wild individuals.…”

Section: Discussionsupporting

confidence: 85%

Nature beats nurture: a case study of the physiological fitness of free-living and laboratory-reared maleAnopheles gambiae s.l.

Huho

Ng’habi

Killeen

et al. 2007

Journal of Experimental Biology

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SUMMARY Laboratory experimentation forms the basis for most of our knowledge of the biology of many organisms, in particular insects. However, the accuracy with which laboratory-derived estimates of insect life history and behaviour can predict their fitness and population dynamics in the wild is rarely validated. Such comparison is especially important in cases where laboratory-derived information is used to formulate and implement strategies for the genetic control of insects in nature. We have conducted a comparative study of the reproductive potential and life history of male Anopheles gambiaeGilies sensu lato mosquitoes from both standardized laboratory conditions and from natural field settings. We measured three indirect indicators of male mosquito fitness: energetic reserves, body size and survival, in a bid to determine whether the demographics and energetic limitations of wild males can be correctly predicted from their laboratory counterparts. Crucially, the body size and lipid reserves of wild males were substantially greater than those reared under standard laboratory conditions. We caution that the energetic limitations of insects as identified in the laboratory may underestimate their resilience in the wild, and discuss the implications of this phenomenon with respect to vector-borne disease control programmes based on genetic control of mosquitoes.

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Section: Discussionsupporting

confidence: 85%

Nature beats nurture: a case study of the physiological fitness of free-living and laboratory-reared maleAnopheles gambiae s.l.

Huho

Ng’habi

Killeen

et al. 2007

Journal of Experimental Biology

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“…Some studies have proposed manipulating the sex ratio to change the population growth rate to control invasive species (Barclay 2005;Ferguson et al 2005) or in reintroduction programs (MilnerGulland et al 2003;Saether et al 2004;Robertson et al 2006;Lenz et al 2007). Periodic two-sex models will permit study of such manipulations in more details, and the results from perturbation analysis may provide new guidelines for managers.…”

Section: Resultsmentioning

confidence: 99%

Mating Behavior, Population Growth, and the Operational Sex Ratio: A Periodic Two‐Sex Model Approach

Jenouvrier¹,

Caswell²,

Barbraud³

et al. 2010

The American Naturalist

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We present a new approach to modeling two-sex populations, using periodic, nonlinear two-sex matrix models. The models project the population growth rate, the population structure, and any ratio of interest (e.g., operational sex ratio). The periodic formulation permits inclusion of highly seasonal behavioral events. A periodic product of the seasonal matrices describes annual population dynamics. The model is nonlinear because mating probability depends on the structure of the population. To study how the vital rates influence population growth rate, population structure, and operational sex ratio, we used sensitivity analysis of frequencydependent nonlinear models. In nonlinear two-sex models the vital rates affect growth rate directly and also indirectly through effects on the population structure. The indirect effects can sometimes overwhelm the direct effects and are revealed only by nonlinear analysis. We find that the sensitivity of the population growth rate to female survival is negative for the emperor penguin, a species with highly seasonal breeding behavior. This result could not occur in linear models because changes in population structure have no effect on per capita reproduction. Our approach is applicable to ecological and evolutionary studies of any species in which males and females interact in a seasonal environment.

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“…Laboratory reared mosquitoes generally show extremely low mating success in competition with their wild counterparts (reviewed in Ref. 122). There is growing evidence that the MAGs are associated with male reproductive success across insects.…”

Section: Discussionmentioning

confidence: 99%

Function and composition of male accessory gland secretions inAnopheles gambiae: a comparison with other insect vectors of infectious diseases

Baldini

Gabrieli

Rogers

et al. 2012

Pathogens and Global Health

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Redressing the sex imbalance in knowledge of vector biology

Cited by 70 publications

References 72 publications

Nature beats nurture: a case study of the physiological fitness of free-living and laboratory-reared maleAnopheles gambiae s.l.

Nature beats nurture: a case study of the physiological fitness of free-living and laboratory-reared maleAnopheles gambiae s.l.

Mating Behavior, Population Growth, and the Operational Sex Ratio: A Periodic Two‐Sex Model Approach

Function and composition of male accessory gland secretions inAnopheles gambiae: a comparison with other insect vectors of infectious diseases

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