@article{fdi:010012105,
  title = {{A}re tsetse fly populations close to equilibrium ?},
  author = {{J}arry, {M}. and {G}outeux, {J}ean-{P}aul and {K}haladi, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{G}lossina or tsetse flies, the vector of sleeping sickness, form a unique group of insect with remarkable characteristics. {T}hey are viviparous with a slow rhythm of reproduction (one larva approximately every 10 days) determined by the regular ovulation of alternate ovaries. {T}his unusual physiology enables the age of the females to be estimated by examining the ovaries. {T}he resulting ovarian age structure of tsetse fly populations has been used to develop research into the demography of tsetse flies. {S}everal authors have proposed methods of estimating populations growth rates from ovarian age distribution data. {H}owever, such methods are applicable only when the growth rate (lambda) is equal to 1 (i.e. the intrinsic rate of increase r is equal to 0). {I}n fact in this type of estimation, the adult survival rate a (or equivalently the mortality rate) cannot be dissociated from the growth rate. {O}ther independently determined demographic parameters must be used to remove this lack of identifiability. {W}e have built a matrix model of the dynamics of tsetse fly populations which enables the growth rate to be calculated from the pupal survival rate, the pupal period and the adult survival rate. {A}ssuming that the age-groups of the population studied have reached a stable distribution, it is possible to calculate the probabilities for the observed sample of belonging to each of the age-groups, to construct a likewood function and thus to obtain an estimate of the "apparent survival rate" b{\^e}ta = a/lambda. {I}f the pupal survival rate and the pupal period are known, a and lambda can then be calculated from b{\^e}ta. {T}he application of this method to data collected for other two annual cycles in a savannah habitat ({B}urkina-{F}aso) showed a high overall stability in the populations of #{G}lossina palpalis gambiensis$... ({D}'apr{\`e}s r{\'e}sum{\'e} d'auteur)},
  keywords = {{MALADIE} {DU} {SOMMEIL} ; {VECTEUR} ; {DYNAMIQUE} {DE} {POPULATION} ; {METHODOLOGIE} ; {VARIATION} {SAISONNIERE} ; {TAUX} {DE} {MORTALITE} ; {AGE} {PHYSIOLOGIQUE} ; {CHANGEMENT} {CLIMATIQUE} ; {BURKINA} {FASO}},
  booktitle = {},
  journal = {{A}cta {B}iotheoretica},
  volume = {44},
  numero = {},
  pages = {317--333},
  ISSN = {0001-5342},
  year = {1996},
  URL = {https://www.documentation.ird.fr/hor/fdi:010012105},
}