scholarly journals Habitat differences affect the nuclear morphology of the erythrocytes and the hepatic melanin in Leptodactylus fuscus (Anura) in the Brazilian Cerrado savanna

2021 ◽  
Author(s):  
Rhayane Alves Assis ◽  
Wadson Rodrigues Rezende ◽  
Cirley Gomes Araújo dos Santos ◽  
Marcelino Benvindo-Souza ◽  
Nathan Pereira Lima Amorim ◽  
...  
Keyword(s):  
Nuclear Morphology ◽  
Brazilian Cerrado ◽  
Habitat Differences ◽  
Cerrado Savanna

scholarly journals Habitat Differences Affect the Nuclear Morphology of the Erythrocytes and the Hepatic Melanin in Leptodactylus Fuscus (Anura) in the Brazilian Cerrado Savanna

2021 ◽  
Author(s):  
Rhayane Alves Assis ◽  
Wadson Rodrigues Rezende ◽  
Cirley Gomes Araújo dos Santos ◽  
Marcelino Benvindo-Souza ◽  
Nathan Pereira Lima Amorim ◽  
...  
Keyword(s):  
Protected Area ◽  
Habitat Destruction ◽  
Nuclear Morphology ◽  
Brazilian Cerrado ◽  
Combined Analysis ◽  
Nuclear Abnormalities ◽  
Agricultural Environment ◽  
Habitat Differences ◽  
Cerrado Savanna

Abstract The sensitivity of anuran to the effects of habitat destruction and contamination has led to a preoccupying global decline in their populations. Morphological biomarkers such as micronuclei and other erythrocyte nuclear abnormalities (ENAs) and the occurrence of hepatic melanin can be used to evaluate the effects of habitat impacts. In the present study, these two procedures were combined for the in situ assessment of the effects of soybean cultivation on the grassfrog, Leptodactylus fuscus. Specimens were also collected from a protected area to provide a control (non-agricultural environment). The frequency of some nuclear abnormalities in the animals from the soybean plantation was much higher than the control, specifically, micronuclei were 3.6 times more frequent, while lobulated nuclei were 3.4 times more frequent, and reniform nuclei, four times more common. The combined analysis of all the ENAs also revealed a frequency approximately 1.4 times higher in the animals from the soybean plantation, in comparison with the protected area. Smaller areas of hepatic melanin were observed in the specimens from the soybean plantation. These results provide further evidence of the sensitivity of anurans to habitat impacts, and indicate that animals found in soybean plantations are susceptible to systematic alterations of the cells.

scholarly journals Drivers of fire occurrence in a mountainous Brazilian cerrado savanna: Tracking long-term fire regimes using remote sensing

2017 ◽  
Vol 78 ◽  
pp. 270-281 ◽  
Author(s):  
Swanni T. Alvarado ◽  
Tamires Fornazari ◽  
Andresa Cóstola ◽  
Leonor Patricia Cerdeira Morellato ◽  
Thiago Sanna Freire Silva
Keyword(s):  
Remote Sensing ◽  
Fire Regimes ◽  
Fire Occurrence ◽  
Brazilian Cerrado ◽  
Cerrado Savanna

scholarly journals Influence of seasonality in plant bug species (Hemiptera – Heteroptera) associated with lobeira (Solanum Lycocarpum A.ST.HIL. – Solanaceae) in the Brazilian cerrado, Minas Gerais state

O Biológico ◽  
2020 ◽  
Vol 82 (1) ◽  
pp. 1-17
Author(s):  
Luciano Santana Fiuza Ferreira ◽  
Paulo Sérgio Fiuza Ferreira ◽  
Fagner de Souza ◽  
Jocélia Grazia ◽  
José Antônio Fernandes ◽  
...  
Keyword(s):  
Minas Gerais ◽  
Wild Animals ◽  
Brazilian Cerrado ◽  
Livestock Farming ◽  
Insect Fauna ◽  
True Bugs ◽  
Cerrado Savanna ◽  
Minas Gerais State ◽  
Perennial Shrub ◽  
One Year

Solanum lycocarpum A. St-Hil (wolf’s fruit or lobeira) (Solanaceae) is a perennial shrub typical of the Brazilian Cerrado (savanna), under constant cutting and burning due to anthropic activities for the development of agricultural and livestock farming. It presents therapeutic medicinal attributes for humans and wild animals primarily as an anthelmintics. Little is known about the insect fauna associated with S. lycocarpum, and no study has been conducted on the true bugs (Heteroptera) associated with it. For the study, the true bugs were sampled from ten points in the mesoregion of Triangulo Mineiro and Alto Paranaiba for one year in two seasonal periods of drought and rain. In each locality, 20 shrubs of S. lycocarpum were selected.

scholarly journals Hydrophytic Cyperaceae from the Araguaia river basin, Brazil

Rodriguésia ◽  
2011 ◽  
Vol 62 (4) ◽  
pp. 847-866 ◽  
Author(s):  
Adriana Luiza Ribeiro de Oliveira ◽  
André dos Santos Bragança Gil ◽  
Claudia Petean Bove
Keyword(s):  
River Basin ◽  
Geographic Distribution ◽  
Brazilian Cerrado ◽  
Identification Keys ◽  
Araguaia River ◽  
Cerrado Savanna

Abstract Cyperaceae is a cosmopolitan family with over 5,000 species, which are often found in wet habitats. In this study we found 31 hydrophylic species of Cyperaceae, belonging to 10 genera (Ascolepis, Calyptrocarya, Cyperus, Eleocharis, Fimbristylis, Fuirena, Lipocarpha, Pycreus, Rhynchospora and Scleria), that occur in the Araguaia River Basin, located mainly within the Brazilian Cerrado (savanna). Short descriptions, geographic distribution, illustrations, identification keys and comments are presented.

scholarly journals Identification of the taxonomic status of Scinax nebulosus and Scinax constrictus (Scinaxinae, Anura) based on molecular markers

2020 ◽  
Author(s):  
T. M. B. Freitas ◽  
J. B. L. Sales ◽  
I. Sampaio ◽  
N. M. Piorski ◽  
L. N. Weber
Keyword(s):  
Molecular Markers ◽  
Morphological Traits ◽  
Morphological Analysis ◽  
Taxonomic Status ◽  
Distinct Species ◽  
Brazilian Cerrado ◽  
Anuran Species ◽  
Cerrado Savanna ◽  
Statistical Support ◽  
Analytical Approaches

Abstract The validation of many anuran species is based on a strictly descriptive, morphological analysis of a small number of specimens with a limited geographic distribution. The Scinax Wagler, 1830 genus is a controversial group with many doubtful taxa and taxonomic uncertainties, due a high number of cryptic species. One example is the pair of species Scinax constrictus and Scinax nebulosus, which share a similar morphology. Scinax constrictus is restricted to the Brazilian Cerrado savanna, while S. nebulosus is widely distributed throughout northern South America. Despite the validation of many anuran species, discriminations based only on morphological traits is quite difficult due to the high conservative morphology of some groups. In this context, the present study uses mitochondrial and nuclear genes to provide a more consistent diagnosis and test the validity of S. constrictus as a distinct species from S. nebulosus, as well as evaluate the position of these taxa within the Scinax genus. The topologies obtained herein uphold the monophyletic status of Scinax based on all molecular markers assessed in this study, in all analytical approaches, with high levels of statistical support.

scholarly journals Ticks on birds in a forest fragment of Brazilian cerrado (savanna) in the municipality of Uberlândia, State of Minas Gerais, Brazil

2010 ◽  
Vol 19 (4) ◽  
pp. 244-248 ◽  
Author(s):  
Graziela Virginia Tolesano-Pascoli ◽  
Khelma Torga ◽  
Alexandre Gabriel Franchin ◽  
Maria Ogrzewalska ◽  
Monize Gerardi ◽  
...  
Keyword(s):  
Rhipicephalus Sanguineus ◽  
Parasite Prevalence ◽  
Adult Tick ◽  
Domestic Animal ◽  
Minas Gerais ◽  
Boophilus Microplus ◽  
Brazilian Cerrado ◽  
Forest Fragment ◽  
Infestation Intensity ◽  
Cerrado Savanna

This is a report of ticks species, parasite prevalence and infestation intensity of birds in a forest fragment (18º 56' 57" S and 48º 12' 14" W) within the Brazilian cerrado (savanna), in the municipality of Uberlândia, State of Minas Gerais, Brazil. A total of 162 birds from 26 species were captured. One adult tick, 296 larvae and 67 nymphs were found on passerine birds. Of these, it was identified 31 larvae and 27 nymphs of Amblyomma longirostre, 17 nymphs of A. nodosum, one A. cajennense larvae and one male of Rhipicephalus sanguineus. All other ticks were identified as Amblyomma sp. larvae (n = 264) or nymphs (n = 26). Overall tick infestation intensity and prevalence were 4.32 ticks/infested bird and 52%, respectively. Sampling of host-seeking ticks on the ground within the forest during a two-year period showed only five Amblyomma sp. nymphs and one adult male of A. nodosum whereas a search for ticks on domestic animals (cattle, horses and dogs) found Rhipicephalus (Boophilus) microplus ticks. Although identification was possible in only 27% of bird ticks there seemed to be no correlation between environmental and domestic animal and bird infestation. It can be assumed that bird infestation may occur above the ground or at specific sites not sampled.

scholarly journals New distribution records and notes on the habitat of Magneuptychia flavofascia Zacca & Siewert, 2014 (Lepidoptera: Nymphalidae)

Check List ◽  
2015 ◽  
Vol 11 (4) ◽  
pp. 1692 ◽  
Author(s):  
Lucas A. Kaminski ◽  
Rafael Dell’Erba ◽  
Eduardo P. Barbosa ◽  
André V. L. Freitas
Keyword(s):  
Dna Barcode ◽  
Systematic Position ◽  
Brazilian Cerrado ◽  
Adult Behavior ◽  
Cerrado Savanna ◽  
New Distribution

The recently described butterfly Magneu­ptychia flavofascia was formerly known from only two localities in the Brazilian Cerrado savanna. Here, we report new distribution records, DNA barcode sequences, and information on the habitat, adult behavior and systematic position of this species.

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