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Titolo:
CIRCULATING PROLACTIN OF INCUBATING MALE WILSONS-PHALAROPES CORRESPONDS TO CLUTCH SIZE AND ENVIRONMENTAL-STRESS
Autore:
DELEHANTY DJ; ORING LW; FIVIZZANI AJ; ELHALAWANI ME;
Indirizzi:
UNIV NEVADA,ECOL EVOLUT & CONSERVAT BIOL PROGRAM,1000 VALLEY RD RENO NV 89512 UNIV N DAKOTA,DEPT BIOL GRAND FORKS ND 58202 UNIV MINNESOTA,DEPT ANIM SCI ST PAUL MN 55108
Titolo Testata:
The Condor
fascicolo: 2, volume: 99, anno: 1997,
pagine: 397 - 405
SICI:
0010-5422(1997)99:2<397:CPOIMW>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLYCATCHERS FICEDULA-HYPOLEUCA; TURKEYS MELEAGRIS-GALLOPAVO; LIVING PIED FLYCATCHERS; LUTEINIZING-HORMONE; SPOTTED SANDPIPER; SECRETION; BEHAVIOR; TRICOLOR; CARE;
Keywords:
WILSONS PHALAROPE; PROLACTIN; STRESS; CLUTCH-SIZE; INCUBATION; NEST ABANDONMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
D.J. Delehanty et al., "CIRCULATING PROLACTIN OF INCUBATING MALE WILSONS-PHALAROPES CORRESPONDS TO CLUTCH SIZE AND ENVIRONMENTAL-STRESS", The Condor, 99(2), 1997, pp. 397-405

Abstract

We measured the effect of clutch-size changes on levels of circulating prolactin (prl) among incubating male Wilson's Phalaropes in order to identify the influence of clutch-size as an exogenous determinant ofcirculating prl, and to better understand the endocrinology of clutchabandonment. One year of the study was characterized by unusually high temperatures and drought, and incubating males appeared to be heavily stressed based on ambient temperatures and rates of weight loss. We used the contrasting environmental conditions between years to comparelevels of circulating prl among males experiencing different levels of environmental stress. We found a strong inter-year effect, with significantly lower prl during the high stress year. We also found a cleareffect of clutch-size on level of circulating prl during the low stress year of the study. Males with increased or decreased clutch-size had lower levels of circulating prl than did control males. Because prl levels were so variable, we sought alternative explanations to year and clutch-size effects. We examined nine environmental and physiological factors a posteriori for a relationship with circulating prl. Although we identified weak correlates, none of the additional factors couldaccount for the variation in prl explained by year and clutch-size. incubating male Wilson's Phalaropes appear to experience an adaptive endocrine change when the potential fitness of their clutch is compromised.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 04:50:49