Green-rumped Parrotlet (Forpus passerinus)

2020 ◽  
Author(s):  
Nigel Collar ◽  
Peter F. D. Boesman
Keyword(s):  
Forpus Passerinus

Weak Association between Measures of Health and Reproductive Success in Green-Rumped Parrotlets (Forpus passerinus) in Venezuela

The Auk ◽  
2004 ◽  
Vol 121 (3) ◽  
pp. 717-725
Author(s):  
Jennifer A. Sheridan ◽  
Steven R. Beissinger ◽  
Colin R. Hughes
Keyword(s):  
Reproductive Success ◽  
Forpus Passerinus ◽  
Weak Association

REACTION OF NESTING BLUE-WINGED PARROTLETS FORPUS PASSERINUS TO A WASP

Ibis ◽  
2008 ◽  
Vol 103a (2) ◽  
pp. 289-289 ◽  
Author(s):  
C. J. O. Harrison
Keyword(s):  
Forpus Passerinus

scholarly journals Vertical transmission of learned signatures in a wild parrot

2011 ◽  
Vol 279 (1728) ◽  
pp. 585-591 ◽  
Author(s):  
Karl S. Berg ◽  
Soraya Delgado ◽  
Kathryn A. Cortopassi ◽  
Steven R. Beissinger ◽  
Jack W. Bradbury
Keyword(s):  
Experimental Studies ◽  
Adult Males ◽  
Contact Call ◽  
Social Functions ◽  
Vocal Production ◽  
Care Givers ◽  
Forpus Passerinus ◽  
Contact Calls ◽  
Parrot Species ◽  
Parrot Population

Learned birdsong is a widely used animal model for understanding the acquisition of human speech. Male songbirds often learn songs from adult males during sensitive periods early in life, and sing to attract mates and defend territories. In presumably all of the 350+ parrot species, individuals of both sexes commonly learn vocal signals throughout life to satisfy a wide variety of social functions. Despite intriguing parallels with humans, there have been no experimental studies demonstrating learned vocal production in wild parrots. We studied contact call learning in video-rigged nests of a well-known marked population of green-rumped parrotlets ( Forpus passerinus ) in Venezuela. Both sexes of naive nestlings developed individually unique contact calls in the nest, and we demonstrate experimentally that signature attributes are learned from both primary care-givers. This represents the first experimental evidence for the mechanisms underlying the transmission of a socially acquired trait in a wild parrot population.

scholarly journals Weak Association Between Measures of Health and Reproductive Success in Green-Rumped Parrotlets (Forpus Passerinus) in Venezuela

The Auk ◽  
2004 ◽  
Vol 121 (3) ◽  
pp. 717-725
Author(s):  
Jennifer A. Sheridan ◽  
Steven R. Beissinger ◽  
Colin R. Hughes
Keyword(s):  
Reproductive Success ◽  
Blood Cell ◽  
White Blood Cell ◽  
Threshold Level ◽  
Egg Laying ◽  
Transient Nature ◽  
Forpus Passerinus ◽  
Cell Counts ◽  
Blood Cell Counts ◽  
White Blood Cell Counts

Abstract The relationship between health and demography in the Green-rumped Parrotlet (Forpus passerinus) was examined, using hematological measurements as indicators of health. Variation in adult hematology with gender, age, time during nesting cycle, and breeding status were examined. Only gender and time during nesting cycle showed significant effects on hematology. Females had higher white-blood-cell counts and immunoglobulin-G (IgG) levels than males. Hematocrit was lower during egg laying than at other stages for females, whereas white-blood-cell counts and IgG and alpha-2-macroglobulin (α2m) levels were higher. In males, IgG and α2m levels were higher during egg laying. We expected that hematological indicators of health would predict reproductive success. Some relationships were identified (α2m was negatively related to number of fledglings in males and females, female lymphocytes were negatively related to number of eggs, and basophils were negatively related to number of fledglings) at P < 0.05. However, despite substantial sample sizes (n > 25), none of those relationships were significant after Bonferroni correction, though there appears to be a threshold level for those hematological measures, below which adults may have high or low reproductive success, but above which reproductive success will be low. We suggest that the effect of micro-rather than macroparasites may affect health, resulting in weak effects on reproductive success. Because of the transient nature of microparasitic infection, health and reproductive success may be more significantly related over an organism’s lifetime than in any given year.

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