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Brazilian Journal of Biology, Revista Brasleira de Biologia

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https://www.readbyqxmd.com/read/28614425/polyploidy-as-a-chromosomal-component-of-stochastic-noise-variable-scalar-multiples-of-the-diploid-chromosome-complement-in-the-invertebrate-species-girardia-schubarti-from-brazil
#1
E G F Benya, A M Leal-Zanchet, J Hauser
Chromosome stoichiometry, a form of genetic plasticity, specifically refers to variation in the standard diploid genomic composition of an individual or species. In the present work, freshwater planarians (Girardia schubarti) were analyzed to recognize variations in chromosomal stoichiometry especially of complete ploidal change between specimens, within specimens and between cells within specimens and any relations they might have with selected components of phenotypic plasticity. Homoploid polyploids for the group reached rational scalar multiples (e...
June 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28614424/effects-of-roads-on-the-vertebrates-diversity-of-the-indigenous-territory-paresi-and-its-surrounding
#2
T R Brum, M Santos-Filho, G R Canale, A R A Ignácio
Roadkill impact is still underestimated due to the lack of knowledge of its intensity and effect on animal populations. To assess differences between animal roadkills on roads in distinct landscapes, this study recorded meso- and megavertebrate roadkills along 50 km during a year in two highways in the transitional area of Amazonia/Cerrado in Tangará da Serra, Mato Grosso: MT-358 and MT-235, the latter crossing the Paresi Indigenous Land. We assessed roadkill rates and points with higher rates of roadkills, recording the most impacted species, seasonal effects, biomass loss, activity period of species, and traffic volume...
June 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28614423/parasitism-by-a-digenea-in-lucina-pectinata-mollusca-lucinidae
#3
M M Ribeiro, J B Oliveira, G Boehs
Lucina pectinata is an important economic resource in the Brazilian coast. This study reports parasitism caused by a Digenea in this species. The specimens (n = 470) were collected in December 2012 in a mangrove swamp of the Cachoeira River estuary, Bahia, Brazil. They were measured along the anterior-posterior axis (length), and after macroscopic analysis for parasites and diseases cuts of 5 mm were fixated in Carnoy's solution and processed by routine histology technique wherein sessions of 7 μm were stained with Harris hematoxylin and eosin (H&E)...
June 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28614422/characterization-of-oxidative-stress-biomarkers-in-a-freshwater-anomuran-crab
#4
A C P Borges, J F G Piassão, M O Paula, S Sepp, C F S Bez, L U Hepp, A T Valduga, A A Mielniczki Pereira, R L Cansian
In general, environmental responses at level of populations or communities are preceded by alterations at lower biological levels which can be efficiently detected by the analysis of biomarkers. We analyzed the oxidative biomarkers TBARS and Catalase in Aegla singularis, a freshwater crustacean highly sensitive to environmental changes. The objective was to address if are differences in these biomarkers related to the gender as well if they are influenced by seasonal or water physicochemical variables. The results showed differences in biomarkers profile related to the gender...
June 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562788/economic-valuation-of-the-ecosystem-services-provided-by-a-protected-area-in-the-brazilian-cerrado-application-of-the-contingent-valuation-method
#5
F M Resende, G W Fernandes, D C Andrade, H D Néder
Considering that the economic valuation of ecosystem services is a useful approach to support the conservation of natural areas, we aimed to estimate the monetary value of the benefits provided by a protected area in southeast Brazil, the Serra do Cipó National Park. We calculated the visitor's willingness to pay to conserve the ecosystems of the protected area using the contingent valuation method. Located in a region under intense anthropogenic pressure, the Serra do Cipó National Park is mostly composed of rupestrian grassland ecosystems, in addition to other Cerrado physiognomies...
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562787/effect-of-land-use-in-seasonal-abundance-of-eared-dove-zenaida-auriculata-in-southwestern-brazil
#6
G G Silva, D L Guadagnin
Changes at the landscape scale associated with expansion in agricultural land use and changes in agricultural practices are common causes of alteration in patterns of abundance and composition of avian communities. Eared Dove (Zenaida auriculata - Des Murs, 1847) is among the most common species in the Neotropics, considered both as game and pest in some countries. Here we characterized the regional and seasonal patterns of Eared Doves abundance in Southwestern Brazil and examined the relationship between landscape features and these abundance patterns...
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562786/structure-dynamics-of-a-fish-community-over-ten-years-of-formation-in-the-reservoir-of-the-hydroelectric-power-plant-in-upper-uruguay-river
#7
G Schork, E Zaniboni-Filho
The objective of this study was to evaluate the structure of the fish assemblage in the ten years following the closing of the lake of the Itá Hydroelectric Power Plant. Seasonal collections were conducted from 2001 to 2010. During this period, 44,834 fish were captured, totaling 3,818.01 kg, among 8 orders, 24 families and 84 species. In general, profound changes were not observed in the fish assemblage in the ten years after the formation of the Itá lake. Few species changed in dominance over time, while many were rare in the environment...
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562785/cytogenetic-analysis-in-different-populations-of-rhodnius-prolixus-and-r-nasutus-from-different-countries-of-south-america
#8
A Ravazi, K C C Alevi, J Oliveira, J A Rosa, M T V Azeredo-Oliveira
No abstract text is available yet for this article.
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562784/karyosystematic-and-karyotype-evolution-of-panstrongylus-lutzi-neiva-pinto-1923-hemiptera-triatominae
#9
K C C Alevi, C H L Imperador, E O L Fonseca, C G S Santos, M T V Azeredo-Oliveira, J A Rosa, J Oliveira
No abstract text is available yet for this article.
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562783/occurrence-of-allorhogas-sp-hymenoptera-braconidae-doryctinae-associated-with-galls-on-seeds-of-inga-vera-fabaceae-in-brazil
#10
T Morales-Silva, S L Modesto-Zampieron
No abstract text is available yet for this article.
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562782/first-record-of-solmundella-bitentaculata-cnidaria-aeginidae-in-par%C3%A3-state-shelf-brazil
#11
T N S Banha, S N Stampar, J E Martinelli-Filho
No abstract text is available yet for this article.
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562781/potential-distribution-and-conservation-of-the-colobosauroides-carvalhoi-soares-and-caramaschi-1998-a-rare-and-endemic-lizard-of-northeast-brazil
#12
A J C Magalhães-Júnior, G J B Moura, L B Ribeiro, S M Azevedo-Júnior
Ecological niche modeling has contributed to the investigation of the geographical distribution and conservation of rare or little recorded species. Therefore, we studied the known and potential distributions of Colobosauroides carvalhoi Soares and Caramaschi 1998 and discuss the implications for its conservation. Data were obtained by manual collections made in quarterly samplings in three different regions, considering the regions with occurrence records and surrounding areas. The known distribution was determined by occurrence records and literature data, and potential distribution was estimated with an ecological niche model by the MaxEnt algorithm...
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562780/first-record-of-leucism-for-atractus-reticulatus-serpentes-dipsadidae
#13
O M Entiauspe-Neto, A D Abegg, F M Quintela, C Mario-da-Rosa, L Malta-Borges, D Loebmann
No abstract text is available yet for this article.
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562779/record-of-leptoglossus-cinctus-hemiptera-coreidae-associated-with-the-native-tree-byrsonima-sericea-malpighiaceae-and-the-cashew-tree-anacardium-occidentale-anacardiaceae
#14
I M M Lima, L V Nascimento, J V L Firmino, J A M Fernandes, J Grazia, A C M Malhado, R P Lyra-Lemos
No abstract text is available yet for this article.
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562778/the-beetle-costalimaita-ferruginea-coleoptera-chysomelidae-in-eucalyptus-plantations-in-transition-area-of-amazon-and-cerrado-biomes
#15
T K R Dias, E M Pires, A P Souza, A A Tanaka, E B Monteiro, C F Wilcken
Costalimaita ferruginea (Coleoptera: Chrysomelidae) attacks Eucalyptus plants causing severe damage through netting of the leaves. Recently, this Coleoptera has been reported attacking Myrtaceae in Mato Grosso State and, studies about the occurrence of this beetle in commercial plantations of eucalypts has been the subject of researchers through monitoring programmes in the forest protection area. With the beginning of the rainy season, adults were observed causing damage in eucalypt plantations in four cities that are part of the transition region of Amazon and Cerrado Biomes...
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562777/proteic-and-phenolics-compounds-contents-in-bacupari-callus-cultured-with-glutamine-and-nitrogen-sources
#16
H P Marques, S Barbosa, D A Nogueira, M H Santos, B R Santos, P R Santos-Filho
In this study was evaluated the influence of glutamine supplementation on the endogenous content of amino acids, proteins, total phenolics, flavonoids and proanthocyanidins in Bacupari callus. The explants were inoculated in MS medium, MS with half concentration of the nitrogen salts (MS½) and nitrogen-free MS, supplemented with glutamine (5, 10, 30 and 60mM) named as Gln5, Gln10, Gln30 and Gln60. Amino acids and proteins were analyzed after 20, 80 and 140 days and the secondary metabolites on the 140th day...
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562776/parasitism-by-monogenoidea-in-piaractus-mesopotamicus-characiformes-characidae-cultivated-in-paran%C3%A3-river-brazil
#17
M S L Leão, M C N Justo, G W Bueno, S C Cohen, S C São Clemente
This study investigated the occurrence, prevalence, mean abundance and mean intensity of monogenoidean parasites in Piaractus mesopotamicus farmed in cages in the reservoir of the Itaipu Hydroelectric Power Station, Paraná River, Brazil. The parasite distribution pattern and the correlation of prevalence and abundance with the total length of hosts were also investigated. Four monogenoidean species were collected: Anacanthorus penilabiatus, A. toledoensis, Mymarothecium ianwhitingtoni and M. viatorum. All the parasites collected in P...
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562775/acetylcholine-produces-contractions-mediated-by-the-cyclooxygenase-pathway-in-arterial-vessels-in-the-chilean-frog-calyptocephalella-gayi
#18
F A Moraga, N Urriola-Urriola
Previous studies performed in marine fish (I. conceptionis and G. laevifrons) showed that indomethacin blocked arterial contraction mediated by acetylcholine (ACh). The objective of this study was to determine if contraction induced by acetylcholine is mediated by the cyclooxygenase pathway in several arterial vessels in the Chilean frog Calyptocephalella gayi. Arteries from the pulmonary (PA), dorsal (DA), mesenteric (MA) and iliac (IA) regions were dissected from 6 adult specimens, and isometric tension studies were done using dose response curves (DRC) for ACh (10-13 to 10-3 M) in presence of a muscarinic antagonist (Atropine 10-5 M) and an unspecific inhibitor of cyclooxygenases (Indomethacin, 10-5M)...
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28562774/physiological-cellular-and-molecular-aspects-of-the-desiccation-tolerance-in-anadenanthera-colubrina-seeds-during-germination
#19
L E Castro, C C Guimarães, J M R Faria
During germination, orthodox seeds become gradually intolerant to desiccation, and for this reason, they are a good model for recalcitrance studies. In the present work, physiological, biochemical, and ultrastructural aspects of the desiccation tolerance were characterized during the germination process of Anadenanthera colubrina seeds. The seeds were imbibed during zero (control), 2, 8, 12 (no germinated seeds), and 18 hours (germinated seeds with 1 mm protruded radicle); then they were dried for 72 hours, rehydrated and evaluated for survivorship...
May 25, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28492807/biochemical-parameters-of-silver-catfish-rhamdia-quelen-after-transport-with-eugenol-or-essential-oil-of-lippia-alba-added-to-the-water
#20
J Salbego, C Toni, A G Becker, C C Zeppenfeld, C C Menezes, V L Loro, B M Heinzmann, B Baldisserotto
The transport of live fish is a routine practice in aquaculture and constitutes a considerable source of stress to the animals. The addition of anesthetic to the water used for fish transport can prevent or mitigate the deleterious effects of transport stress. This study investigated the effects of the addition of eugenol (EUG) (1.5 or 3.0 µL L-1) and essential oil of Lippia alba (EOL) (10 or 20 µL L-1) on metabolic parameters (glycogen, lactate and total protein levels) in liver and muscle, acetylcholinesterase activity (AChE) in muscle and brain, and the levels of protein carbonyl (PC), thiobarbituric acid reactive substances (TBARS) and nonprotein thiol groups (NPSH) and activity of glutathione-S-transferase in the liver of silver catfish (Rhamdia quelen; Quoy and Gaimard, 1824) transported for four hours in plastic bags (loading density of 169...
May 4, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
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