Estradiol Cypionate (ECP) Markedly Improves Survival of Willow Ptarmigan in Captivity

The Condor ◽  
1993 ◽  
Vol 95 (1) ◽  
pp. 211-217
Author(s):  
Kathy Martin ◽  
Cynthia A. Wright
Keyword(s):  
Willow Ptarmigan ◽  
In Captivity

Experimental evaluation of age, body size, and experience in determining territory ownership in willow ptarmigan

1991 ◽  
Vol 69 (7) ◽  
pp. 1834-1841 ◽  
Author(s):  
Kathy Martin
Keyword(s):  
Body Size ◽  
Body Mass ◽  
Breeding Season ◽  
Experimental Evaluation ◽  
Willow Ptarmigan ◽  
Breeding Experience ◽  
Experimental Removal ◽  
Pair Bonds ◽  
Site Familiarity ◽  
In Captivity

During 1981–1984, 18% of resident males in a population of willow ptarmigan at La Perouse Bay, Manitoba, Canada, were unpaired at onset of breeding, whereas all resident females acquired males. Territory ownership and pair bonds were very stable within seasons, with only three territory and mate takeovers by males occurring among 275 pair-years. I present data on origins, age, body size and mass, familiarity with the site, and breeding experience for paired and unpaired males, and on responses of both sexes to vacancies created by the experimental removal of mates. Of 61 paired males (territory owners) removed after onset of incubation, 70% were replaced by either unpaired males or, to a lesser extent, by paired territorial neighbours. When seven original owners were released after over a week in captivity, five regained their territories and mates, displacing replacement males quickly. Initial territorial dominance was related to age, body size, site familiarity, and breeding experience, as original paired owners were older, larger, and more likely than unpaired males to have resided on the area and to have been paired in a previous year. However, neither age, body size, body mass, familiarity with the area, nor territorial or breeding experience predicted which unpaired males obtained territories and mates when opportunities were created. In contrast to males, females killed during incubation were not replaced. In other populations of willow ptarmigan where removals were done about 1 month earlier in the breeding season, females replaced at vacancies and males that replaced were more likely to be territorial paired males expanding their boundaries than unpaired males.

Avipoxvirus detected in tumor-like lesions in a white-faced whistling duck (Dendrocygna viduata)

2020 ◽  
Vol 40 (10) ◽  
pp. 818-823
Author(s):  
Juliana F.V. Braga ◽  
Rodrigo M. Couto ◽  
Marcelo C. Rodrigues ◽  
Roselene Ecco
Keyword(s):  
Squamous Cell Carcinoma ◽  
Phylogenetic Analysis ◽  
Protein Gene ◽  
Core Protein ◽  
Avian Species ◽  
Tissue Samples ◽  
Histopathological Evaluation ◽  
In Captivity ◽  
Avian Pox ◽  
Tumor Like Lesions

ABSTRACT: Avipoxvirus is the etiological agent of the avian pox, a well-known disease of captive and wild birds, and it has been associated with tumor-like lesions in some avian species. A white-faced whistling duck (Dendrocygna viduata) raised in captivity was referred to a Veterinary Teaching Hospital in Northeast due to cutaneous nodules present in both wings. A few days after the clinical examination, the animal died naturally. Once submitted to necropsy, histopathological evaluation of the lesions revealed clusters of proliferating epithelial cells expanding toward the dermis. Some of these cells had round, well-defined, intracytoplasmic eosinophilic material suggestive of poxvirus inclusion (Bollinger bodies). PCR performed on the DNA extracted from tissue samples amplified a fragment of the 4b core protein gene (fpv167), which was purified and sequenced. This fragment of Avipoxvirus DNA present in these tumor-like lesions showed high genetic homology (100.0%) with other poxviruses detected in different avian species in several countries, but none of them were related to tumor-like lesions or squamous cell carcinoma. This is the first report of Avipoxvirus detected in tumor-like lesions of a white-faced whistling duck with phylogenetic analysis of the virus.

Willow Ptarmigan (Lagopus lagopus)

1998 ◽  
Author(s):  
S. J. Hannon ◽  
P. K. Eason ◽  
K. Martin
Keyword(s):  
Willow Ptarmigan ◽  
Lagopus Lagopus

scholarly journals Effect of captivity on morphology: negligible changes in external morphology mask significant changes in internal morphology

2018 ◽  
Vol 5 (5) ◽  
pp. 172470 ◽  
Author(s):  
Stephanie K. Courtney Jones ◽  
Adam J. Munn ◽  
Phillip G. Byrne
Keyword(s):  
Sexual Dimorphism ◽  
Captive Breeding ◽  
Morphological Changes ◽  
External Morphology ◽  
Wild Animals ◽  
Internal Morphology ◽  
In Captivity ◽  
Two Generations ◽  
Breeding Programmes ◽  
Source Populations

Captive breeding programmes are increasingly relied upon for threatened species management. Changes in morphology can occur in captivity, often with unknown consequences for reintroductions. Few studies have examined the morphological changes that occur in captive animals compared with wild animals. Further, the effect of multiple generations being maintained in captivity, and the potential effects of captivity on sexual dimorphism remain poorly understood. We compared external and internal morphology of captive and wild animals using house mouse ( Mus musculus ) as a model species. In addition, we looked at morphology across two captive generations, and compared morphology between sexes. We found no statistically significant differences in external morphology, but after one generation in captivity there was evidence for a shift in the internal morphology of captive-reared mice; captive-reared mice (two generations bred) had lighter combined kidney and spleen masses compared with wild-caught mice. Sexual dimorphism was maintained in captivity. Our findings demonstrate that captive breeding can alter internal morphology. Given that these morphological changes may impact organismal functioning and viability following release, further investigation is warranted. If the morphological change is shown to be maladaptive, these changes would have significant implications for captive-source populations that are used for reintroduction, including reduced survivorship.

scholarly journals First confirmed complete incubation of a flapper skate ( Dipturus intermedius ) egg in captivity.

2021 ◽  
Author(s):  
Steven Benjamins ◽  
Georgina Cole ◽  
Adam Naylor ◽  
James A. Thorburn ◽  
Jane Dodd
Keyword(s):  
In Captivity
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