| carcase and component yields of rheas. | 1. three greater rheas (rhea americana) and 5 lesser rheas (pterocnemia pennata) were slaughtered, using the procedures conventional for ostriches in south africa, in order to determine the expected yield of by-products and saleable lean meat, fat and bone of rheas. 2. differences (p < 0.05) between species were found in the proportional weight of the wings, feet, skin and liver. the wings, feet and head of rheas form a higher proportion of the carcase than in ostriches, whereas the skin of the ... | 1997 | 9347146 |
| gizzard impaction in lesser rhea chicks (pterocnemia pennata) raised on farms in patagonia, argentina. | impaction of the gizzard was diagnosed in 33 1-to-4-wk-old lesser rhea (pterocnemia pennata) raised on farms in patagonia, argentina. the birds showed anorexia, lethargy, constipation, dehydration, weight loss, and weakness. necropsy revealed gizzard impaction by fibrous material, sand, rocks, and rubbish. also, excess fibrous material was observed in the small intestine, and intussusception was found in one chick. impaction of the gizzard observed in the present study was similar to that report ... | 2001 | 11332489 |
| complete mitochondrial dna genome sequences of extinct birds: ratite phylogenetics and the vicariance biogeography hypothesis. | the ratites have stimulated much debate as to how such large flightless birds came to be distributed across the southern continents, and whether they are a monophyletic group or are composed of unrelated lineages that independently lost the power of flight. hypotheses regarding the relationships among taxa differ for morphological and molecular data sets, thus hindering attempts to test whether plate tectonic events can explain ratite biogeography. here, we present the complete mitochondrial dna ... | 2001 | 11370967 |
| characterization and chromosomal distribution of novel satellite dna sequences of the lesser rhea (pterocnemia pennata) and the greater rhea (rhea americana). | two different types of novel satellite dna (stdna) sequences were cloned from the lesser rhea (ptercnemia pennata) and the greater rhea (rhea americana) after digestion of genomic dnas with a restriction endonuclease pvu ii, and characterized by filter hybridization and in-situ hybridization to metaphase chromosomes. these nucleotide sequences consisted of gc-rich 288-bp and 332-bp repeated elements in p. pennata and 288-bp and 336-bp repeated elements in r. americana, all of which were organize ... | 2002 | 12489832 |
| hematology and serum chemistry values of the lesser rhea (pterocnemia pennata) raised in patagonian farms (argentina). | hematologic and serum chemistry values were determined for chicks, juveniles, and adult farmed lesser rheas (prerocnemia pennata). blood samples were taken during march-april 1998 from the brachial veins of lesser rhea, including 64 chicks, 24 juveniles, and 36 adults, raised in patagonian farms (argentina). lesser rhea chicks had significantly lower erythrocyte counts, hematocrit, hemoglobin, red cell indices, and copper than did the juveniles and adult individuals. no significant differences w ... | 2002 | 12564529 |
| physical characteristics and chemical composition of lesser rhea (pterocnemia pennata) eggs from farmed populations. | 1. eggs from 4 farmed populations of lesser rhea (pterocnemia pennata) were studied to determine their physical and chemical characteristics. 2. none of the physical variables (weight of whole egg, yolk, albumen and shell; proportion of yolk based on egg content; proportion of shell based on entire egg weight; volume; density) showed significant differences between populations. 3. among chemical variables, moisture, both saturated fatty acids (palmitic 16:0 and stearic 18:0), one monounsaturated ... | 2003 | 14584848 |
| hatching success and embryonic mortality on lesser rhea (pterocnemia pennata) farms in northern patagonia, argentina. | 1. the hatching success and embryonic mortality of 724 lesser rhea eggs from 12 farms in northern patagonia, argentina were monitored during the 2000 breeding season. 2. average infertility was 24.5%, embryonic mortality was 33.5%, hatchability of fertile eggs was 66.5% and the neonatal mortality was 57.0%. there were large variations between different farms. 3. bacterial contamination was high and egg hatchability was also affected by the occurrence of oedematous and malformed embryos. 4. no si ... | 2004 | 15484720 |
| the molecular basis of chromosome orthologies and sex chromosomal differentiation in palaeognathous birds. | palaeognathous birds (struthioniformes and tinamiformes) have morphologically conserved karyotypes and less differentiated zw sex chromosomes. to delineate interspecific chromosome orthologies in palaeognathous birds we conducted comparative chromosome painting with chicken (gallus gallus, gga) chromosome 1-9 and z chromosome paints (gga1-9 and ggaz) for emu, double-wattled cassowary, ostrich, greater rhea, lesser rhea and elegant crested tinamou. all six species showed the same painting pattern ... | 2007 | 17605112 |
| a review of the nutritional content and technological parameters of indigenous sources of meat in south america. | meat yields, proximate compositions, fatty acids compositions and technological parameters are reviewed for species which might be further developed as indigenous sources of meat in south america. these include the alpaca (lama pacos), capybara (hydrochoerus hydrochaeris), guanaco (lama guanicoe), llama (lama glama), nutria (myocastor coypus), collared peccary (tayassu tajacu), greater rhea (rhea americana), lesser rhea (rhea pennata), yacare (caiman crocodilus yacare), tegu lizard (tupinambis m ... | 2008 | 22063568 |
| gastrointestinal parasites in greater rheas (rhea americana) and lesser rheas (rhea pennata) from argentina. | few data exist on the parasites of ratites, especially from regions within their natural range. it is only recently that extensive studies on the parasites of ostriches (struthio camelus) have been published, mainly from european countries where commercial farming has expanded. two species of ratites are native in south america: the lesser rhea also known as darwin's rhea (rhea pennata) and the greater rhea (rhea americana). both species are considered near threatened by the iucn and are include ... | 2012 | 23305970 |
| permanent genetic resources added to molecular ecology resources database 1 february 2012 - 31 march 2012. | this article documents the addition of 171 microsatellite marker loci and 27 pairs of single nucleotide polymorphism (snp) sequencing primers to the molecular ecology resources database. loci were developed for the following species: bombus pauloensis, cephalorhynchus heavisidii, cercospora sojina, harpyhaliaetus coronatus, hordeum vulgare, lachnolaimus maximus, oceanodroma monteiroi, puccinia striiformis f. sp. tritici, rhea americana, salmo salar, salmo trutta, schistocephalus solidus, sousa p ... | 2012 | 22642264 |
| medicinal use of wild fauna by mestizo communities living near san guillermo biosphere reserve (san juan, argentina). | wild and domestic animals and their by-products are important ingredients in the preparation of curative, protective and preventive medicines. despite the medicinal use of animals worldwide, this topic has received less attention than the use of medicinal plants. this study assessed the medicinal use of animals by mestizo communities living near san guillermo mab reserve by addressing the following questions: what animal species and body parts are used? what ailments or diseases are treated with ... | 2015 | 25608977 |
| a new species of procyrnea (nematoda: habronematidae) parasitic in rhea pennata (aves: rheidae) from patagonia, argentina, with a key to species of the genus. | procyrnea choique n. sp. is described from the lesser rhea, rhea pennata d´orbigny (aves: rheidae), from the protected natural area península valdés, chubut province, argentina. the new species resembles p. ficheuri, p. murrayi, p. excisiformis, p. dollfusi, p. haliasturi, p. anterovulvata, p. graculae, p. brevicaudata, p. uncinipenis, p. javaensis, p. ameerae, p. ornata, p. aegotheles, p. spiralis, p. ruschii and p. aptera, mainly in the absence of lateral alae; but differs from its congeners b ... | 2017 | 28758604 |
| rapid assessment of distribution of wildlife and human activities for prioritizing conservation actions in a patagonian landscape. | large landscapes encompassing reserves and areas with other human uses are necessary for conservation of many species. generating information for conservation planning over such landscapes may be expensive and time-consuming, though resources for conservation are generally limited and conservation is often urgent. we developed a sign-based occupancy survey to help prioritize conservation interventions by simultaneously assessing the distribution of 3 species, the lesser rhea, guanaco, and mara, ... | 2015 | 26061066 |
| dna test to sex the lesser rhea (rhea pennata pennata). | 1. a polymerase-chain-reaction (pcr)-based test was adapted to sex the lesser rhea. feathers instead of blood were used as the source of dna. 2. the primers used allowed the assignment of sex by amplification of z and w chromosome linked sequences. 3. this method proved to be safe, accurate and non-invasive. 4. the w chromosome linked fragment was sequenced and compared to other ratite sequences. | 2006 | 16787863 |
| the zw pairs of two paleognath birds from two orders show transitional stages of sex chromosome differentiation. | pachytene oocytes from the two presumably most primitive orders (paleognathae) among living birds were used to study the pairing behaviour and location of recombination nodules (rns) in the sex pair. in the ratite pterocnemia pennata (rheiformes), the 42 analyzed zw pairs show an average of 2.2 rns distributed along 80% of the synaptonemal complex (sc) that covers the long arm of the acrocentric z and w chromosomes in this homomorphic sex pair. in the tinamid rynchotus rufescens (tinamiformes), ... | 1999 | 10598569 |
| cholesterol content and fatty acid composition of rhea meat. | the influence of species and muscle on the intramuscular fat content, cholesterol content and fatty acid composition of greater and lesser rhea meat were evaluated. muscle has no influence (p>0.05) on any of these characteristics. neither intramuscular fat (1.23%) nor cholesterol content (57 mg/100 g) differed (p>0.05) between species. despite differences (p<0.05) in the percentage of individual fatty acids, total saturated fatty acids (33.1%) did not differ (p>0.05) between species, while total ... | 1999 | 22063084 |
| deletrocephalus dimidiatus infestation in an adult rhea (pterocnemia pennata). | infection with the nematode deletrocephalus dimidiatus was found in the distal small and proximal large intestines of a 30-month-old female rhea that had died after a prolonged illness. numerous strongyle-like eggs were found on fecal flotation. possible treatments include fenbendazole (60 ppm in water) and ivermectin (200 mg/kg). preventive measures such as artificial incubation, segregation of chicks from adults, and placing chicks in uncontaminated environments may help slow or stop the trans ... | 2003 | 7677670 |
| genetic identification of the ciliates from greater rheas (rhea americana) and lesser rheas (rhea pennata) as balantioides coli. | the ciliate species balantioides coli can be cross-transmitted between humans and several animal species. usually harmless, sometimes it can be pathogenic and cause the death of the host. in birds, b. coli has been confirmed in ostriches by genetic analysis, but the identification from south american greater rheas (rhea americana) and lesser rheas (rhea pennata pennata) is tentative. since these species are reared for commercial purposes and for reintroduction into the wild, it is necessary to e ... | 2020 | 31811426 |
| genetic factors for short life span associated with evolution of the loss of flight ability. | acquisition or loss of flying ability is evolutionarily linked with maximum life span (mls) in mammals and birds. although ecological factors, such as extrinsic mortality, may lead to either shortened or extended life spans through natural selection, mls is influenced by complex molecular and metabolic processes, and the genetic changes associated with flying ability that have led to either a longer or shorter mls are unknown. here, we examine the parallel evolution of flight in mammals and bird ... | 2020 | 32607209 |