May captive populations of Greater Rhea (Rhea americana) act as genetic reservoirs in Argentina?

Zoo Biology ◽  
2010 ◽  
pp. n/a-n/a ◽  
Author(s):  
V. Alonso Roldán ◽  
J. L. Navarro ◽  
C. N. Gardenal ◽  
M. B. Martella
Keyword(s):  
Rhea Americana ◽  
Greater Rhea ◽  
Captive Populations

The relevance of captive breeding to conservation of native ratites in Argentina: an overview

2008 ◽  
Vol 48 (10) ◽  
pp. 1302 ◽  
Author(s):  
J. L. Navarro ◽  
M. B. Martella
Keyword(s):  
Captive Breeding ◽  
Radio Telemetry ◽  
Natural Populations ◽  
Natural Habitats ◽  
Rhea Americana ◽  
Illegal Hunting ◽  
Greater Rhea ◽  
Wild Fauna ◽  
Captive Populations ◽  
Lesser Rhea

The two South American ratites (Lesser Rhea, Pterocnemia pennata and Greater Rhea, Rhea americana) are categorised as ‘Near Threatened’ in the Red List of Threatened Species of the International Union for Conservation of Nature and Natural Resources, and are included in Appendices 1 and II of Convention on International Trade in Endangered Species of Wild Fauna and Flora. The wild populations of rheas are affected by human activities, such as illegal hunting and egg harvesting, and conversion of natural habitats into croplands. On the other hand, commercial farming of rheas has been expanding in the last two decades. Studies on farms have led to improved production, not only for commercialisation, but also for the release of individuals to the wild. Effectiveness of this latter strategy was confirmed by fieldwork and radio-telemetry. Molecular studies revealed that genetic variability of captive populations of Greater Rhea were similar to those of wild ones, and they do not show signs of inbreeding depression or differences in allele frequencies. Consequently, as natural populations of rheas continue to decline, farms will arguably serve as genetic reservoirs and provide a source of individuals for repopulation. Therefore captive breeding should be regarded as having high value as a conservation tool for native ratites.

Effects of storage time on hatchability of artificially incubated Greater Rhea (Rhea americana) eggs

2004 ◽  
Vol 45 (5) ◽  
pp. 638-642 ◽  
Author(s):  
M.C. Lábaque ◽  
J.L. Navarro ◽  
M.B. Martella
Keyword(s):  
Storage Time ◽  
Rhea Americana ◽  
Greater Rhea

scholarly journals Seasonal Changes in Plasma Levels of Sex Hormones in the Greater Rhea (Rhea americana), a South American Ratite with a Complex Mating System

PLoS ONE ◽  
2014 ◽  
Vol 9 (5) ◽  
pp. e97334 ◽  
Author(s):  
Diego J. Valdez ◽  
Marilina Vera Cortez ◽  
Natalia S. Della Costa ◽  
Alvina Lèche ◽  
Cristian Hansen ◽  
...  
Keyword(s):  
Mating System ◽  
Sex Hormones ◽  
Plasma Levels ◽  
Seasonal Changes ◽  
South American ◽  
Rhea Americana ◽  
Greater Rhea

Adjacent Nesting and Egg Stealing between Males of the Greater Rhea Rhea americana

1995 ◽  
Vol 26 (4) ◽  
pp. 321 ◽  
Author(s):  
Gustavo J. Fernandez ◽  
Juan C. Reboreda
Keyword(s):  
Rhea Americana ◽  
Greater Rhea

A Survey of Enterobacteriaceae and Resistance of Greater Rhea (Rhea Americana) Eggs to Experimental Contamination by Salmonella Enteritidis

2017 ◽  
Vol 10 (1) ◽  
pp. 1-5
Author(s):  
Renato Clini Cervi ◽  
Maria Auxiliadora Andrade ◽  
Cíntia Silva Minafra-Rezende ◽  
Marcos Barcellos Café
Keyword(s):  
Salmonella Enteritidis ◽  
Pathogenic Bacteria ◽  
Bird Species ◽  
Storage Period ◽  
Salmonella Spp ◽  
Rhea Americana ◽  
Greater Rhea ◽  
Bacteria And Fungi ◽  
Protective Structures

Eggs have protective structures against possible contamination by bacteria and fungi. Pathogenic bacteria such as Salmonella spp. are therefore rarely found in adequate sanitary conditions. Few studies about the contamination of ratite eggs have been reported, and although some studies have focused on ostrich eggs, there is no information about Greater Rhea ( Rhea americana) eggs. The microorganisms that contaminate ratite eggs do not differ from those that affect other bird species. The purpose of this study was to characterise contamination in 16 eggs, supplied by a commercial breeding facility, by Enterobacteriaceae contamination and to assess the in vitro resistance to experimental contamination by Salmonella Enteritidis using analytical tests following the guidelines of the Georgia Poultry Laboratory. These elements are critical to the storage period, quality and physicochemical parameters. The results revealed the presence of the genera Proteus, Klebsiella, Citrobacter and Enterobacter related to the location of nests. Greater Rhea eggs were also found to be highly resistant to experimental infection by Salmonella Enteritidis.

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