Estimates of Survival, Population Size, and Emergence of Culex tarsalis at an Isolated Site1,2

Dispersal and survival of Nyssomyia intermedia and Nyssomyia neivai (Diptera: Psychodidae: Phlebotominae) in a cutaneous leishmaniasis endemic area of the speleological province of the Ribeira Valley, state of São Paulo, Brazil

“…For this, the daily survival of males and females was considered constant throughout the time post-release and was calculated based on the recaptured insect numbers regressed and transformed by ln (y + 1), as a function of the days post-release (Nelson et al 1978):…”

“…The survival rate was calculated by the expression S = e b where e is the base of the natural logarithm and b the regression coefficient (Nelson et al 1978) using the SPSS program for Windows.…”

Survival, Population Size, and Gonotrophic Cycle Duration ofNyssomyia neivai(Diptera: Psychodidae) at an Endemic Area of American Cutaneous Leishmaniasis in Southeastern Brazil

“…Female and male daily survivorship was considered constant with time after release and was calculated from the decrease in the number of recaptures transformed by ln(y ϩ 1) regressed as a function of time in days after release (Gilles 1961, Nelson et al 1978, Milby and Reisen 1989:…”

“…Critical population-based parameters of vectorial capacity such as survivorship, population size, gonotrophic cycle duration, and host feeding pattern essentially determine the number of potentially infectious females in the population and the frequency of vectorÐ host contact (Reisen et al 1980, Milby and Reisen 1989, Jensen and Washino 1991. Mark-release-recapture experiments provide the best method of estimating many of these parameters and have been frequently used to assess the biological capacity of different mosquito species populations to serve as vectors of arbovirus and malaria for which they are competent vectors (Nelson et al 1978, Reisen and Aslamkhan 1979, Reisen et al 1980, Milby and Reisen 1989, Jensen and Washino 1991, Reisen and Lothrop 1995, Santos et al 2003, Maciel-de-Freitas et al 2007). Nevertheless, the vectorial capacity of phlebotomine sand ßy populations has not been assessed for either proven or suspected vectors.…”

Estimation and Comparison of Mosquito Survival Rates with Release-Recapture-Removal Data

“…A common approach to handling such data has been to regress the log of the number recaptured (usually after adding one to eliminate problems with a 0 recapture) as a function of time in days after release (Gillies 1961, Gillies and Wilkes 1965, Lindquist et al 1967, Wada et al 1969, Dow 1971, McDonald 1977, Seawright et al 1977, Nelson et al 1978, Reisen et al 1978, Reisen and Aslamkhan 1979, Reisen et al 1980, Nayar 1981, Rawlings et al 1981, Nayar 1982, Haramis and Foster 1983, Linthicum et al 1985, Tripis & Hausermann 1986, Walker et al 1987, Rodriguez et al 1992, Day et al 1994, Constantini et al 1996, Morrison et al 1999. The survival rate purportedly is estimated by exponentiating the resulting slope, and survival rates for different cohorts are compared using a t-test for equal slopes for two linear regressions (Haramis andFoster 1983, Morrison et al 1999).…”