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Titolo:
Cryptic female choice: frogs reduce clutch size when amplexed by undesiredmales
Autore:
Reyer, HU; Frei, G; Som, C;
Indirizzi:
Univ Zurich, Inst Zool, CH-8057 Zurich, Switzerland Univ Zurich Zurich Switzerland CH-8057 Zool, CH-8057 Zurich, Switzerland
Titolo Testata:
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
fascicolo: 1433, volume: 266, anno: 1999,
pagine: 2101 - 2107
SICI:
0962-8452(19991022)266:1433<2101:CFCFRC>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
TOAD BUFO-BUFO; RANA-ESCULENTA; GENOME EXCLUSION; SEXUAL COERCION; OVARIAN CYCLE; LESSONAE; HYBRID; REPRODUCTION; BEHAVIOR; MATINGS;
Keywords:
anurans; cryptic female choice; external fertilization; male-male competition; sexual selection; clutch size adjustment;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Reyer, HU Univ Zurich, Inst Zool, Winterthurerstr 190, CH-8057 Zurich, Switzerland Univ Zurich Winterthurerstr 190 Zurich Switzerland CH-8057 land
Citazione:
H.U. Reyer et al., "Cryptic female choice: frogs reduce clutch size when amplexed by undesiredmales", P ROY SOC B, 266(1433), 1999, pp. 2101-2107

Abstract

In species with internal fertilization, females can 'cryptically' choose (e.g. through sperm selection) which individuals sire their offspring, even when their overt preferences for copulatory partners are overrun by male-male competition and sexual coercion. The experiment presented here reveals that control of paternity after copulation has begun is also possible in species with external fertilization. Females of the hybridogenetic Rana lessonae-Rana esculenta (LL-LR) waterfrog complex adjust their clutch size in response to mate type: they release fewer eggs when amplexed by hybrid LR males-who jeopardize successful reproduction-than when amplexed by parental LL males. This reduction in the number of eggs laid can increase a female's residual reproductive value through a second mating in the same breeding season or a larger clutch size in the next year. We argue that cryptic female choice through clutch size adjustment (i) may have evolved more often than previously assumed, and (ii) can arise even where females mate only once during a reproductive period.

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Documento generato il 26/11/20 alle ore 14:01:40