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Titolo:
EFFECT OF POPULATION-DENSITY AND GENOTYPE ON LIFE-HISTORY TRAITS IN THE ROTIFER BRACHIONUS-PLICATILIS MULLER,O.F.
Autore:
CARMONA MJ; SERRA M; MIRACLE MR;
Indirizzi:
UNIV VALENCIA,AREA ECOL E-46100 BURJASSOT SPAIN
Titolo Testata:
Journal of experimental marine biology and ecology
fascicolo: 2, volume: 182, anno: 1994,
pagine: 223 - 235
SICI:
0022-0981(1994)182:2<223:EOPAGO>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
BISEXUAL REPRODUCTION; ASEXUAL REPRODUCTION; TEMPERATURE; SALINITY; WATER; EGGS;
Keywords:
INTRASPECIFIC VARIABILITY; LIFE-HISTORY TRAIT; MATERNAL EFFECT; POPULATION DENSITY; REPRODUCTION; ROTIFER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
M.J. Carmona et al., "EFFECT OF POPULATION-DENSITY AND GENOTYPE ON LIFE-HISTORY TRAITS IN THE ROTIFER BRACHIONUS-PLICATILIS MULLER,O.F.", Journal of experimental marine biology and ecology, 182(2), 1994, pp. 223-235

Abstract

Effects of population density on mictic response and the population dynamics of 13 clones of Brachionus plicatilis were investigated by culturing isolated females at two different population densities. Resultsfrom the experiments did not provide general support for the dependence of mictic response on population density. Only six clones, isolatedamictic females cultured at a density of 5 females.ml-1, produced higher proportions of mictic female offspring than females grown at a density of 1 female.ml-1, indicating that mictic-female production in these clones of B. plicatilis is density-dependent. High population density affected other life-history traits: lifespan (e0) and fertility perfemale lifetime (R0) decreased with density. Interclone differences in the mictic response to density were detected, which may be caused bygenetic differences in the capacity to undergo mixis. High variabilities for mictic rates and life-table parameters were found among clonesderived by selfing from a clone. These results indicate that age of the parental female is also a significant internal factor that affects the production of mictic daughters.

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Documento generato il 04/12/20 alle ore 06:47:14