The myology of the Amazonian Manatee, Trichechus inunguis (Natterer) (Mammalia: Sirenia)
نویسندگان
چکیده
منابع مشابه
Phylogeography and population genetics of the endangered Amazonian manatee, Trichechus inunguis Natterer, 1883 (Mammalia, Sirenia).
We used mitochondrial DNA control region sequences to examine phylogeography and population differentiation of the endangered Amazonian manatee Trichechus inunguis. We observe lack of molecular differentiation among localities and we find weak association between geographical and genetic distances. However, nested clade analysis supports restricted gene flow and/or dispersal with some long-dist...
متن کاملUrinary parameters of Trichechus inunguis (Mammalia, Sirenia): reference values for the Amazonian Manatee.
The Amazonian manatee, Trichechus inunguis (Natterer 1883) is endemic to the Amazon Basin and is currently considered a vulnerable species. In order to establish normality ranges of urinary parameters to help monitor the health of this species in captivity, chemical urinalyses were performed on twelve males and nine females of various age groups. Urine was collected once a month for twelve mont...
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Meristic variation is often limited in serially homologous systems with high internal differentiation and high developmental modularity. The mammalian neck, an extreme example, has a fixed (at seven) count of diversely specialized segments. Imposition of the mammalian cervical constraint has been tentatively linked to the origin of the diaphragm, which is muscularized by cells that migrate from...
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This study describes the morphological, morphometric and ultrastructural characteristics of the Amazonian manatee Trichechus inunguis (Natterer, 1883) spermatozoon. The spermatozoa were obtained from a urine sample of an adult T. inunguis kept in captivity. The spermatozoa were analyzed by light and transmission electron microscopy. The head of Amazonian manatee spermatozoa had a flat oval shap...
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A 12-year old, adult male, West indian Manatee, Trichechus manatus, which stranded in Ponce, Puerto Rico 26 August 1992, died from cardiac failure. Suppurative epicarditis, myocarditis and endocarditis with mild to moderate degeneration and necrosis was caused by an unidentified infectious agent. Moderate to heavy parasite respiratory infections with Cochleotrema cochleotrema and intestinal inf...
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ژورنال
عنوان ژورنال: Acta Amazonica
سال: 1978
ISSN: 0044-5967
DOI: 10.1590/1809-439219780821s005