scholarly journals The effect of food restriction on the regulation of gonadotropin-releasing hormone in male house finches (Haemorhous mexicanus)

2019 ◽  
Vol 282 ◽  
pp. 113196 ◽  
Author(s):  
Shelley Valle ◽  
Chandrima Das ◽  
Simone L. Meddle ◽  
Pierre Deviche
Keyword(s):  
Food Restriction ◽  
Gonadotropin Releasing Hormone ◽  
House Finches ◽  
Releasing Hormone ◽  
Effect Of Food ◽  
Male House ◽  
Haemorhous Mexicanus

Repeatability of combat rate across different group compositions in male house finches

Behaviour ◽  
2018 ◽  
Vol 155 (10-12) ◽  
pp. 883-904
Author(s):  
Masaru Hasegawa ◽  
Mathieu Giraudeau ◽  
Russell A. Ligon ◽  
Nobuyuki Kutsukake ◽  
Mamoru Watanabe ◽  
...  
Keyword(s):  
Physiological Stress ◽  
Male Identity ◽  
House Finches ◽  
Animal Contests ◽  
Focal Individual ◽  
Urban Males ◽  
Rural Sites ◽  
Group Compositions ◽  
Male House ◽  
Haemorhous Mexicanus

Abstract Studies of animal contests have focused on the probability of winning an encounter, because it directly affects the benefits of competition. However, the costs (e.g., physiological stress) and benefits of competition should also depend on the number of aggressive encounters per unit time (combat rate, hereafter) in which the focal individual is involved. Using colourful and drab male house finches (Haemorhous mexicanus) from urban and rural sites, we showed that combat rate was repeatable across the same and different group sizes for birds who won competitions. In addition, colourful urban males exhibited the lowest propensity for frequent aggression (and hence low combat rate). However, male bill size (another trait we previously found to correlate with male competitiveness in this species) was not related to aggressive propensity. Combat rate can be predicted by male identity and some, but not all, predictors of male competitiveness.

Carotenoid-based plumage coloration reflects feather corticosterone levels in male house finches (Haemorhous mexicanus)

2013 ◽  
Vol 67 (11) ◽  
pp. 1817-1824 ◽  
Author(s):  
Á. Z. Lendvai ◽  
M. Giraudeau ◽  
J. Németh ◽  
V. Bakó ◽  
K. J. McGraw
Keyword(s):  
Plumage Coloration ◽  
House Finches ◽  
Male House ◽  
Feather Corticosterone ◽  
Haemorhous Mexicanus

186: Neoadjuvant Gonadotropin-Releasing Hormone Therapy Before Orchiopexy Improves the Fertility Index in Concomitant Testicular Biopsies

2004 ◽  
Vol 171 (4S) ◽  
pp. 49-49
Author(s):  
Christian Schwentner ◽  
Andreas Lunacek ◽  
Josef Oswald ◽  
Georg Bartsch ◽  
Alfons Kreczy ◽  
...  
Keyword(s):  
Hormone Therapy ◽  
Gonadotropin Releasing Hormone ◽  
Releasing Hormone ◽  
Fertility Index
Sign in / Sign up

Export Citation Format

Share Document