Environmental and social modulation of hormones and behavior in a free living songbird, the black redstart
نویسندگان
چکیده
Ich versichere hiermit an Eides statt, dass die vorgelegte Dissertation von mir selbständig und ohne unerlaubte Hilfe angefertigt ist. Erklärung Hiermit erkläre ich, dass die Dissertation nicht ganz oder in wesentlichen Teilen einer anderen Prüfungskommission vorgelegt worden ist und dass ich mich anderweitig einer Doktorprüfung ohne Erfolg nicht unterzogen habe. Experimental induction of social instability during early breeding does not alter testosterone levels in male black redstarts, a socially monogamous songbird……………………………………………………………………….…15 Chapter Two The number of life-history stages does not influence the androgen responsiveness to male-male interactions: Sedentary and migratory black redstarts (Phoenicurus ochruros) do not elevate testosterone in response to simulated territorial intrusions………………………………………………………………….25 Chapter Three Parental care, loss of paternity and circulating levels of testosterone and corticosterone in a socially monogamous song
منابع مشابه
اثر دگزامتازون بر واکنشهای اضطرابی در موشهای سوری
The Effect of Dexamethasone on Anxiety Related Behavior in Mice A.A. Vafaei PhD , H. Miladi-Gorgi MSc , A.A. Taherian MD2, A. Rashidy-Pour PhD Received: 08/05/06 Sent for Revision: 05/10/06 Received Revised Manuscript: 12/11/06 Accepted: 14/12/06 Background and Objective: Previous studies have suggested that activation of the glucocorticoid receptors may have a modulatory effect on fear and anx...
متن کاملSocial modulation of testosterone levels in male black howlers (Alouatta pigra).
The influence of social factors on the modulation of male testosterone levels has been demonstrated among several vertebrate species. In addition to sexual activity, parental care and reproductive competition affect testosterone secretion. We examined variations in testosterone levels among male black howlers (Alouatta pigra) in various social contexts. Fecal samples were collected from nine ma...
متن کاملEffects of non-living mulches and metribuzin on yield and yield components of tomato (Lycopersicon escolentum cv. CH)
ABSTRACT- To compare the effects of six types of non-living mulches (wheat straw, sawdust, coco peat, peat moss, transparent and black plastic) with metribuzin on yield and yield components of tomato cv "CH" and the weed control efficiency, a study was conducted in a randomized complete block design with three replications at School of Agriculture, Shiraz University in 2012. Plots without mulch...
متن کاملSocial factors affecting electoral behavior: Presidential election in Mazandaran province
The main objective of this research is the sociological study of the impact of social influences on electoral behavior in Iran's presidential election among citizens living in Mazandaran province. This research is descriptive-analytic and survey is carried out using a researcher-made questionnaire. Using Cochran's formula, 384 individuals were selected as sample size and then statistical sampli...
متن کاملThe acoustic expression of stress in a songbird: does corticosterone drive isolation-induced modifications of zebra finch calls?
Animal vocalizations convey multiple pieces of information about the sender. Some of them are stable, such as identity or sex, but others are labile like the emotional or motivational state. Only a few studies have examined the acoustic expression of emotional state in non-human animals and related vocal cues to physiological parameters. In this paper, we examined the vocal expression of isolat...
متن کامل