Download or read book Dominance Interactions and Plumage Polymorphism in the White throated Sparrow Zonotrichia Albicollis written by Barbara Jean Bernier and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hormonal Mediation of a Unique Behavioral Polymorphism in the White throated Sparrow Zonotrichia Albicollis written by Meredith Bettencourt Swett and published by . This book was released on 2007 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this body of work, I examine how testosterone (T) physiology mediates the life-history trade-off between mating effort and parental care in the White-throated Sparrow. This species exhibits a behavioral polymorphism that occurs in both sexes. White-striped (WS) morphs are more territorially aggressive, sing more frequently and seek more extra-pair copulations. Tan-striped (TS) morphs provision nestlings more frequently. Thus this species roughly illustrates the trade-off between mating effort and parental care. I examine T physiology on three levels: plasma titres, binding globulins and response to the social environment. I ask whether levels of T correlate with morph-specific behavior and does this relationship change with stage in the nesting cycle. I found that WS males have significantly higher plasma levels of T than TS males. This difference is small, but it persisted through the parental stage of the nesting cycle. This suggests that T may mediate differences in mating effort and parental behavior in males, but is likely not the only factor. Female morphs did not differ in plasma T, thus T does not appear to play a similar role in females. Next I ask how corticosterone binding globulin (CBG) modulates T action. I found that CBG binds over 90% of T and is an important modulator of T action in this species. However CBG capacity did not differ between morphs, nor did morphs differ in baseline levels of corticosterone (CORT, a stress hormone that competes with T for binding sites on CBG.) Therefore interactions with CBG and CORT do not affect T action differently in the morphs, and patterns of free T (T not bound to CBG) mirror patterns of total T. Finally I investigated how T physiology responds to a change in the social environment- the establishment of a dominance relationship. WS males exhibited aggression more frequently and tended to dominate TS males. Levels of total T, CBG, CORT and free T were not predictive of future dominance status. Nor did these measures show persistent changes once the dominance relationship was established. The response of T physiology to the formation of a dominance relationship did not differ between morphs.

Download or read book Behavioural Correlates of Plumage Polymorphism and Post fledging Parental Care in the White throated Sparrow zonotrichia Albicollis written by Jeffrey G. Kopachena and published by . This book was released on 1992 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Causes and Consequences of Social Dominance in Wintering White throated Sparrows written by Walter H. Piper and published by . This book was released on 1988 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Crown Plumage Variation in Zonotrichia Albicollis the White throated Sparrow written by Linda E. Donaldson Vardy and published by . This book was released on 1969 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Corticosterone and Morph specific Variation in the Reproductive Behavior of the Polymorphic White throated Sparrow Zonotrichia Albicollis written by Brent Horton and published by . This book was released on 2007 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Variation in Female Brooding Behavior in the Polymorphic White throated Sparrow Zonotrichia Albicollis written by Heidi L. Murray and published by . This book was released on 2006 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spatial Relationships and Aggression in the White throated Sparrow Zonotrichia Albicollis written by Emily Dale Kennedy and published by . This book was released on 1979 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Pairing on Activity Pattern of the White throated Sparrow Zonotrichia Albicollis Gmelin written by Mercedes Consuelo Mondecar and published by . This book was released on 1982 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Colour and Behavioural Polymorphism in the White throated Sparrow Zonotrichia Albicollis Gmelin written by James Kerr Lowther and published by . This book was released on 1962 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Animal Behaviour Abstracts written by and published by . This book was released on 1984 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Examination of Possible Testosterone Formation Fat Deposition Interaction and White throated Sparrows Zonotrichia Albicollis written by Terri Lynne Hathorne and published by . This book was released on 1980 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Behavioural Biology Abstracts written by and published by . This book was released on 1984 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dominance Hierarchies Foraging and Predation in Winter Flocks of the White throated Sparrow Zonotrichia Albicollos written by Kathryn Claire Johnson Schneider and published by . This book was released on 1979 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book White throated Sparrow written by J. B. Falls and published by . This book was released on 1994 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Relationships Among Familiar White throated Sparrows Zonotrichia Albicollis when Combined with Strangers written by John E. R. Perry (III) and published by . This book was released on 1984 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book White throated Sparrow written by and published by . This book was released on 2015 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: