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Titolo:
Size-specific mortality and natural selection in freshwater turtles
Autore:
Bodie, JR; Semlitsch, RD;
Indirizzi:
Bodie Design Grp, Surfside, SC 29575 USA Bodie Design Grp Surfside SC USA29575 Design Grp, Surfside, SC 29575 USA Univ Missouri, Div Biol Sci, Columbia, MO 65211 USA Univ Missouri Columbia MO USA 65211 Div Biol Sci, Columbia, MO 65211 USA
Titolo Testata:
COPEIA
fascicolo: 3, , anno: 2000,
pagine: 732 - 739
SICI:
0045-8511(20000804):3<732:SMANSI>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHRYSEMYS-PICTA-BELLII; SEVERELY HYPOXIC WATER; LONG-TERM SUBMERGENCE; BODY-SIZE; CHELYDRA-SERPENTINA; PSEUDEMYS-SCRIPTA; TRACHEMYS-SCRIPTA; BERGMANNS RULE; SURVIVORSHIP; SURVIVAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
62
Recensione:
Indirizzi per estratti:
Indirizzo: Bodie, JR Bodie Design Grp, 1711 Barndenberry Dr, Surfside, SC 29575 USA Bodie Design Grp 1711 Barndenberry Dr Surfside SC USA 29575 USA
Citazione:
J.R. Bodie e R.D. Semlitsch, "Size-specific mortality and natural selection in freshwater turtles", COPEIA, (3), 2000, pp. 732-739

Abstract

We present evidence of an opportunity to measure the strength of natural selection on body size through size-specific winter mortality of freshwater turtles. Data were collected from three overwintering sites along the Missouri River floodplain in central Missouri. Carcasses and live captures of four species indicated that mortality was nonrandomly distributed among species and may be explained by differences in overwintering behaviors. Analysesof mean body size within age classes for two species demonstrated standardized selection differentials ranging from 0.23-0.98 (standard deviation units) against small-sized (juvenile) individuals, our study provides evidenceof winterkill as a selective force on body size and of a possible adaptivemechanism for Bergmann's Rule.

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Documento generato il 27/10/20 alle ore 10:25:00