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Titolo:
Unpredictable offspring survivorship in the damselfly, Megaloprepus coerulatus, shapes parental behavior, constrains sexual selection, and challengestraditional fitness estimates
Autore:
Fincke, OM; Hadrys, H;
Indirizzi:
Univ Oklahoma, Dept Zool, Norman, OK 73019 USA Univ Oklahoma Norman OK USA 73019 lahoma, Dept Zool, Norman, OK 73019 USA Univ Frankfurt, Inst Zool, D-60323 Frankfurt, Germany Univ Frankfurt Frankfurt Germany D-60323 ool, D-60323 Frankfurt, Germany Yale Univ, Dept Ecol & Evolutionary Biol, New Haven, CT 06511 USA Yale Univ New Haven CT USA 06511 olutionary Biol, New Haven, CT 06511 USA
Titolo Testata:
EVOLUTION
fascicolo: 4, volume: 55, anno: 2001,
pagine: 762 - 772
SICI:
0014-3820(200104)55:4<762:UOSITD>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIFETIME REPRODUCTIVE SUCCESS; TREE HOLES; MATING SYSTEMS; SIZE; ODONATA; HISTORY; FECUNDITY; TERRITORIALITY; CONSEQUENCES; CANNIBALISM;
Keywords:
fitness; hatching asynchrony; larval survivorship; Odonata; selection;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
58
Recensione:
Indirizzi per estratti:
Indirizzo: Fincke, OM Univ Oklahoma, Dept Zool, Norman, OK 73019 USA Univ Oklahoma Norman OK USA 73019 t Zool, Norman, OK 73019 USA
Citazione:
O.M. Fincke e H. Hadrys, "Unpredictable offspring survivorship in the damselfly, Megaloprepus coerulatus, shapes parental behavior, constrains sexual selection, and challengestraditional fitness estimates", EVOLUTION, 55(4), 2001, pp. 762-772

Abstract

Evolutionary biologists typically assume that the number of eggs fertilized or developing embryos produced is correlated with an individual's fitness. Using microsatellite markers, we document for the first time estimates ofrealized fitness quantified as the number of offspring surviving to adulthood in an insect under field conditions. In a territorial damselfly whose males defend tree hole oviposition sites, patterns of offspring survivorshipcould not be anticipated by adults. Fewer than half of the parents contributing eggs to a larval habitat realized any reproductive success from theirinvestment. The best fitness correlate was the span over which eggs in a clutch hatched. Among parents, female fecundity and male fertilization success were poor predictors of realized fitness. Although body size was correlated with female clutch size and male mating success, larger parents did notrealize greater fitness than smaller ones. The uncoupling of traditional fitness surrogates from realized fitness provides strong empirical evidence that selection at the larval stage constrains selection on mated adults.

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Documento generato il 03/07/20 alle ore 00:13:41