11 documents found, page 1 of 2
Distribution of freshwater fish from the Southern Neotropics reveals three new ...
Bessonart,José; Loureiro,Marcelo; Guerrero,José Carlos; Szumik,ClaudiaAbstract Ecoregions and areas of endemism are central concepts in biogeography. Based on collection records and the Endemic Analyses implemented with NDM/VNDM method we analyzed fish areas of endemism in the junction of three freshwater ecoregions related to the Rio de la Plata estuary (Lower Parana, Lower Uruguay, Laguna dos Patos) in Southern Neotropical region. Using two grid cell sizes, results obtained sho...
Terahertz Spectroscopy Applied to Diagnostics in Public Health: A Review
Almeida,Meila Bastos de; Schiavo,Letícia; Esmanhoto,Elis; Lenz,Cesar Antonio; Rocha,Jaime; Loureiro,Marcelo; Kmetiuk,Louise BachAbstract Terahertz (THz) spectroscopy is an emerging technology that is that is bringing a number of technical breakthroughs in several scientific applications. This review aimed to describe potential applications of THz spectroscopy at the biochemistry and molecules detection for food industry, environment monitoring and diagnostics, and present the importance of such technological platform in disease control ...
Review of the family Rivulidae (Cyprinodontiformes, Aplocheiloidei) and a molec...
Loureiro,Marcelo; Sá,Rafael de; Serra,Sebastián W.; Alonso,Felipe; Lanés,Luis Esteban Krause; Volcan,Matheus Vieira; Calviño,Pablo; Nielsen,DaltonABSTRACT The family Rivulidae is the fourth most diverse clade of Neotropical fishes. Together with some genera of the related African family Nothobranchiidae, many rivulids exhibit a characteristic annual life cycle, with diapausing eggs and delayed embryonic development, which allows them to survive in the challenging seasonal ponds that they inhabit. Rivulidae also includes two species known as the only the ...
A new species of Gymnogeophagus Miranda Ribeiro from Uruguay (Teleostei: Cichli...
Loureiro,Marcelo; Zarucki,Matías; Malabarba,Luiz R.; González-Bergonzoni,IvánABSTRACT We describe a new species of a substrate-brooding Gymnogeophagus , based on coloration characters. The new species can be distinguished from the remaining substrate-brooding species in the genus by the unique pigmentation of the dorsal fin which consists of light blue, diagonal stripes over a red background in the spiny section and a combination of round, elliptic, and elongated bright blue spots over ...
A new species of Austrolebias Costa (Cyprinodontiformes: Rivulidae) from northe...
Loureiro,Marcelo; Duarte,Alejandro; Zarucki,MatíasA new species of Austrolebias is described based on individuals from the middle and upper río Negro (río Uruguay basin) and río Yaguarón (Patos-Merín system). The new species can be differentiated from all other species of the genus by the unique presence in males of uniform bluish gray pigmentation on flanks (without vertical bands) and unpaired fins. The new species is also distinguished by the combination of...
Feeding habits and morphometry of Iheringichthys labrosus (Lütken, 1874) in the...
Masdeu,Malvina; Mello,Franco Teixeira-de; Loureiro,Marcelo; Arim,MatiasBody size and diet of organisms are fundamental attributes which determine their ecology and natural history. Iheringichthys labrosus is one of the most common fish species of the Uruguay River. However, its natural history is poorly known and there is little information about its diet and interactions with other species. This paper describes the feeding habits of this species, relating feeding patterns to the ...
Diet of Cnesterodon decemmaculatus (Poeciliidae) and Jenynsia multidentata (Ana...
Quintans,Federico; Scasso,Flavio; Loureiro,Marcelo; Yafe,AlejandroDiet of Cnesterodon decemmaculatus (Jenyns, 1842) and Jenynsia multidentata (Jenyns, 1842) were analysed in Lake Rodó, an urban hypertrophic lake from Montevideo, Uruguay. Both species displayed omnivory. The most consumed items for C. decemmaculatus were zooplankton, periphyton, phytoplankton and detritus; the diet of J. multidentata included zooplankton, insects, crustaceans and juvenile fish. Our results sug...
A new species of Gymnogeophagus from the río Negro and río Tacuarí basins, Urug...
González-Bergonzoni,Iván; Loureiro,Marcelo; Oviedo,SebastiánThe new cichlid species Gymnogeophagus tiraparae is described from the río Negro and río Tacuarí basins (Uruguay). The new species is distinguished from other Gymnogeophagus species by the unique presence of the following characters: adipose hump on head deeper than the dorsal-fin upper border, adipose hump with anterior profile vertical, extending from the upper lip to the dorsal-fin origin, absence of transve...
Diet of four annual killifishes: an intra and interspecific comparison
Laufer,Gabriel; Arim,Matías; Loureiro,Marcelo; Piñeiro-Guerra,Juan Manuel; Clavijo-Baquet,Sabrina; Fagúndez,CésarWe examined the diet of 4 annual fishes, Austrolebias viarius, Austrolebias cheradophilus, Austrolebias luteoflammulatus and Cynopoecilus melanotaenia inhabiting temporal ponds of southeastern Uruguay, by analysis of stomach contents. Fishes were captured from fifty ephemeral ponds of Castillos Lagoon basin, in the region of the Humedales del Este. We identified 13099 individual prey items extracted from 669 st...
Reproductive behavior in the annual fish Austrolebias reicherti Loureiro & ...
García,Daniel; Loureiro,Marcelo; Tassino,BettinaAnnual fishes inhabit temporary ponds that dry out seasonally and the adaptations to survive this extreme condition include high metabolic rates and an elaborate courtship behavior which ends in the deposition of drought-resistant eggs, capable of going through diapause stages in the substrate. The pronounced sexual dimorphism that these fishes show suggests that sexual selection could play a key role in the di...