determination of hg and diet identification in otter (lontra longicaudis) analytical procedure for the determination of hg in otter (lontra longicaudis) feces was developed, to separate fish scales for the identification of the animal diet. samples were washed with ultra-pure water and the suspension was sampled and transferred for digestion. the solubilization was performed with nitric-perchloric acid mixture, and detection carried out by the atomic fluorescence spectrometry (afs). the quality of the analytical procedure was assessed by analyzing in-house standard ...200818037199
genetic diversity of the neotropical otter (lontra longicaudis olfers, 1818) in southern and southeastern brazil.the neotropical otter is one of the least known otter species, and it is considered to be threatened to various degrees throughout its geographic range. little information exists on the ecological characteristics of this species, and no genetic study has been published about it until now, hampering the design of adequate conservation strategies for its populations. to contribute with genetic information to comprehensive conservation efforts on behalf of l. longicaudis, we characterized the molec ...200718278347
heavy metals in the habitat and throughout the food chain of the neotropical otter, lontra longicaudis, in protected mexican predators like the neotropical otter, lontra longicaudis annectens, are usually considered good bioindicators of habitat quality. in this study, we evaluated heavy metal contamination (hg(tot), pb, cd) in the riverine habitat, prey (crustaceans and fish), and otter feces in two ramsar wetlands with contrasting upstream contamination discharges: río blanco and río caño grande in veracruz, mexico, during the dry, the wet, and the nortes seasons. most comparisons revealed no differences between ...201322527458
phylogeography and demographic history of the neotropical otter (lontra longicaudis).the neotropical otter (lontra longicaudis) is a medium-sized semiaquatic carnivore with a broad distribution in the neotropical region. despite being apparently common in many areas, it is one of the least known otters, and genetic studies on this species are scarce. here, we have investigated its genetic diversity, population structure, and demographic history across a large portion of its geographic range by analyzing 1471 base pairs (bp) of mitochondrial dna from 52 individuals. our results i ...201222589556
feeding ecology of the neotropical otter lontra longicaudis in the lower arroio grande river, southern brazil.the present study was based on the analysis of spraints (n = 294) collected between december 2005 and november 2007. the importance of each type of prey was determined by absolute and relative frequency. niche breadth was also estimated. the results were reported as mean (± sd) of relative frequencies. fish were the main prey found in spraints (57.8 ± 7.0%). fish from callichthyidae family were the main prey, followed by cichlidae, the species hoplias malabaricus and the family characidae. the f ...201323460432
re-evaluation of the species composition of bashkirovitrema skrjabin, 1944 (digenea: echinostomatidae), with the description of two new species of this genus and the proposal of kostadinovatrema novaeguiniense n. g., n. sp.a comparison of specimens previously identified as bashkirovitrema incrassatum (diesing, 1850) from the african or cape clawless otter aonyx capensis, and the speckle-throated or spotted-throated otter hydrictis maculicollis from the old world with specimens and descriptions of b. incrassatum from the new world showed that those from africa (bashkirovitrema africanum n. sp.) had a more extensive distribution of the vitelline fields than either b. canadense n. sp. from the northern river otter lo ...200919789998
serologic survey of brucellosis in captive neotropical wild carnivores in northeast brazil.abstract. this study reports the detection of antibodies against brucella abortus and b. canis in wild neotropical carnivores kept in captivity in three zoos in northeastern brazil. a total of 42 serum samples were examined, 17 from coatis (nasua nasua), eight from crab-eating raccoons (procyon cancrivorus), three from crab-eating foxes (cerdocyon thous), three from hoary foxes (lycalopex vetulus), two from little spotted cats (leopardus tigrinus), five from tayras (eira barbara), two from great ...201222779245
hypoxanthine-guanine phosphoribosyltransferase and inosine 5'-monophosphate dehydrogenase activities in three mammalian species: aquatic (mirounga angustirostris), semi-aquatic (lontra longicaudis annectens) and terrestrial (sus scrofa).aquatic and semiaquatic mammals have the capacity of breath hold (apnea) diving. northern elephant seals (mirounga angustirostris) have the ability to perform deep and long duration dives; during a routine dive, adults can hold their breath for 25 min. neotropical river otters (lontra longicaudis annectens) can hold their breath for about 30 s. such periods of apnea may result in reduced oxygen concentration (hypoxia) and reduced blood supply (ischemia) to tissues. production of adenosine 5'-tri ...201526283971
ticks (acari: ixodida) on wild carnivores in brazil.the present study reports field data of ticks infesting wild carnivores captured from july 1998 to september 2004 in brazil. additional data were obtained from one tick collection and from previous published data of ticks on carnivores in brazil. during field work, a total of 3437 ticks were collected from 89 cerdocyon thous (crab-eating fox), 58 chrysocyon brachyurus (maned wolf), 30 puma concolor (puma), 26 panthera onca (jaguar), 12 procyon cancrivorus (crab-eating raccoon), 4 speothos venati ...200516082932
discovery of the fossil otter enhydritherium terraenovae (carnivora, mammalia) in mexico reconciles a palaeozoogeographic mystery.the north american fossil otter enhydritherium terraenovae is thought to be partially convergent in ecological niche with the living sea otter enhydra lutris, both having low-crowned crushing teeth and a close association with marine environments. fossil records of enhydritherium are found in mostly marginal marine deposits in california and florida; despite presence of very rich records of fossil terrestrial mammals in contemporaneous localities inland, no enhydritherium fossils are hitherto kn ...201728615353
[diversity, natural history and conservation of mammals from san vito de coto brus, costa rica].although costa rica has been biologically well studied, few areas have complete mammal inventories, which are essential for ecological studies and conservation. the san vito region is considered among the most important for scientific research in the country because of the presence of the wilson botanical garden and las cruces. however, the knowledge of its mammalian fauna is incomplete. we extensively studied the mammals of san vito, compiled a checklist, and evaluated its composition, relative ...200618457190
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