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Titolo:
The role of prolactin in the regulation of clutch size and onset of incubation behavior in the American kestrel
Autore:
Sockman, KW; Schwabl, H; Sharp, PJ;
Indirizzi:
Washington State Univ, Sch Biol Sci, Ctr Reprod Biol, Pullman, WA 99164 USA Washington State Univ Pullman WA USA 99164 od Biol, Pullman, WA 99164 USA Roslin Inst, Div Integrat Biol, Roslin EH25 9PS, Midlothian, Scotland Roslin Inst Roslin Midlothian Scotland EH25 9PS 9PS, Midlothian, Scotland
Titolo Testata:
HORMONES AND BEHAVIOR
fascicolo: 3, volume: 38, anno: 2000,
pagine: 168 - 176
SICI:
0018-506X(200011)38:3<168:TROPIT>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
TURKEYS MELEAGRIS-GALLOPAVO; LUTEINIZING-HORMONE; HATCHING ASYNCHRONY; STREPTOPELIA-RISORIA; PASSIVE-IMMUNIZATION; EXOGENOUS PROLACTIN; ANAS-PLATYRHYNCHOS; FALCO-TINNUNCULUS; PARENTAL BEHAVIOR; PLASMA PROLACTIN;
Keywords:
egg laying Falco sparverius; family planning; hatching asynchrony; optimal reproductive tactic; reproductive success;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Sockman, KW Washington State Univ, Sch Biol Sci, Ctr Reprod Biol, Pullman,WA 99164 USA Washington State Univ Pullman WA USA 99164 lman, WA 99164 USA
Citazione:
K.W. Sockman et al., "The role of prolactin in the regulation of clutch size and onset of incubation behavior in the American kestrel", HORMONE BEH, 38(3), 2000, pp. 168-176

Abstract

In most bird species, the timing of incubation onset may influence the degree of hatching asynchrony, which, together with variation in clutch size, affects reproductive success. In some domesticated species that usually show no hatching asynchrony, plasma prolactin concentrations in females rise with the onset of incubation and the end of laying, and this rise enhances incubation behavior and may terminate laying. To investigate whether a rise in prolactin during laying is involved in the regulation of clutch size andincubation onset in a species with hatching asynchrony, we measured plasmaconcentrations of immunoreactive prolactin (ir-prolactin) in laying American kestrels, Falco sparverius, and quantified clutch size and incubation behavior. In a separate study, we administered one of three concentrations ofovine prolactin (o-prolactin) via osmotic pumps implanted in females when egg 2 of a clutch was laid. ir-Prolactin concentrations during laying were higher in small than in large clutches and increased in parallel with the development of incubation behavior. o-Prolactin treatment enhanced incubation behavior, but did not affect clutch size, possibly because the manipulation was performed after clutch size had already been determined. Consistent with studies on domesticated species that show synchronous hatching, our results indicate that rising prolactin during laying enhances the expression of incubation behavior in a species that shows hatching asynchrony. Furtherstudies are necessary to determine whether the relationship between prolactin and clutch size in the American kestrel is one of causation or of mere association. (C) 2000 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 03:00:33