The Weibull Distribution: A New Method of Summarizing Survivorship Data

Pinder, J.E.; Wiener, James G.; Smith, Michael H.

doi:10.2307/1936645

Cited by 273 publications

(215 citation statements)

References 16 publications

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“…Power analysis (Cohen 1988) shows that with our sample size and variation in survival, we had a 95% chance of detecting a correlation coe¤cient between o¡spring survival and mating success of as little as 0.26. To put this in context, the median r-value between measures of o¡spring survival and sire attractiveness reported by ¢eld studies claiming good-genes e¡ects is 0.47 (von Schantz et al 1989;Norris 1993;Petrie 1994;Hasselquist et al 1996;Sheldon et al 1997); the equivalent ¢gure from the laboratory is 0.65 (Taylor et al 1987;Reynolds & Gross 1654 (Pinder et al 1978), after Crawley (1993. c After correcting for multiple tests of the same hypothesis (Rice 1989), this value remained signi¢cant at p50.05.…”

Section: Discussionmentioning

confidence: 99%

Fisherian flies: benefits of female choice in a lekking sandfly

Jones

Quinnell

Balmford

1998

Proc. R. Soc. Lond. B

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We experimentally investigated the ¢tness consequences of female mate choice in order to test the relative importance of three competing but non-exclusive hypotheses for the maintenance of pronounced female mating preferences on leks: that females bene¢t directly; that they gain indirect Fisherian bene¢ts by producing more attractive sons; or that they bene¢t indirectly because preferred males possess`good genes' that confer increased viability on their sons and daughters. We allowed lekking female sand£ies, Lutzomyia longipalpis, to choose between males of varying attractiveness to females, and monitored the consequences for their own survival and reproductive success as well as for their o¡spring. In contrast to the predictions of the direct-bene¢ts model, we found no clear sire e¡ect on the fecundity or survival of the females themselves; females mating with more attractive males did survive longer after oviposition, but never long enough to undertake a second batch of egg laying. We also found no evidence that females gained good-genes bene¢ts in terms of enhanced o¡spring survival. However, we did ¢nd that generally attractive males fathered sons who were then chosen when they in turn formed leks. Although not completely precluding other bene¢ts, our results indicate that Fisherian bene¢ts are at least partly responsible for maintaining female choice at L. longipalpis leks. These ¢ndings indicate the importance of testing all putative bene¢ts concurrently in exploring the maintenance of female mate choice.

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Section: Discussionmentioning

confidence: 99%

Fisherian flies: benefits of female choice in a lekking sandfly

Jones

Quinnell

Balmford

1998

Proc. R. Soc. Lond. B

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“…The Weibull frequency distribution was used to describe the age-specific survival of all individuals (Pinder et al, 1978): Deevey, 1947) where S p (t) represents the probability of surviving to a given age, bis the parameter that describes the scale, c is shape of the curve and t is time. The shape parameters c>1, c=1 and c<1 correspond to type I, II and III survivorship curves, respectively (Deevey, 1947;Pinder et al, 1978).…”

Section: Life Tablementioning

confidence: 99%

The life table of the lucerne beetle, Gonioctena fornicata (Brüggem) (=Phytodecta fornicatus Brüggem) (Coleoptera, Chrysomelidae) on alfalfa under laboratory conditions

Efe¹,

Özgökçe²

2014

Turkish Journal of Entomology

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“…Se a população considerada tem dependência de sobrevivência do tipo I, a taxa de mortalidade aumenta com o tempo e α > 1; para a dependência de sobrevivência do tipo II, a taxa de mortalidade é constante e, então, á será aproximadamente 1; o tipo III implica em α < 1, o que significa que a taxa de mortalidade decresce com o tempo (Pinder et al 1978).…”

Section: Methodsunclassified