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Brazilian Journal of Biology, Revista Brasleira de Biologia

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https://www.readbyqxmd.com/read/27849255/periphytic-algae-dynamics-in-lentic-ecosystems-in-the-brazilian-semiarid
#1
R S Cordeiro, J E L Barbosa, G Q Lima, L G Barbosa
The hydrological periods drive the structure and organization of aquatic communities in semiarid regions. We hypothesize that a decrease of the precipitation during the dry period will favor the development of the periphytic algal community, leading to higher richness and density in this period. To test this hypothesis, we investigated the changes in the periphytic algal community structure in three shallow and eutrophic ecosystems of the Brazilian semiarid. The sampling was performed between 2007 and 2010 at two-mensal intervals...
November 16, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27849254/first-record-of-the-lesser-snouted-treefrog-scinax-nasicus-cope-1862-in-brazilian-coast-and-new-species-records-for-the-state-of-rio-grande-do-sul
#2
D A Dalmolin, F O Rosa, M D Freire, L F M Fonte, I F Machado, C N Paula, D Loebmann, E Périco
Herein, we provide new occurrence records of Scinax nasicus (Cope, 1862) for the state of Rio Grande do Sul, Southern Brazil. All new records here provide are located on Southern half of the state. Besides this, we provide the first record for species in Brazilian coastal zone. Those records improve considerably our knowledge regarding species distribution in Southern Brazil.
November 16, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27849253/first-report-of-leafminer-lyriomyza-spp-in-daucus-carota-in-brazil
#3
F L Fernandes, M E De S Fernandes, N C R Costa, R C Pereira, A L Dos Santos, R C Ribeiro
No abstract text is available yet for this article.
November 16, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27849252/profiling-of-antioxidant-potential-and-phytoconstituents-of-plantago-coronopus
#4
C G Pereira, L Custódio, M J Rodrigues, N R Neng, J M F Nogueira, J Carlier, M C Costa, J Varela, L Barreira
The halophyte species Plantago coronopus has several described ethnomedicinal uses, but few reported biological activities. This work carried out for the first time a comparative analysis of P. coronopus organs in terms of phenolic composition and antioxidant activity of organic and water extracts from roots, leaves and flowers. The leaves contents in selected nutrients, namely amino acids and minerals, are also described. Roots (ethyl acetate and methanol extracts) had the highest radical scavenging activity (RSA) towards 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radicals, while leaves (hexane extract) had higher RSA on nitric oxide radical and iron chelating ability...
November 16, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27783766/prospective-study-of-the-fishery-of-the-shrimp-plesionika-narval-fabricius-1787-in-the-northeastern-atlantic
#5
R Sousa, M R Pinho, J Delgado, M Biscoito, A R Pinto, T Dellinger, L Gouveia, D Carvalho, P Henriques
Several experimental surveys were carried out in the Northeastern Atlantic, Madeira archipelago from 1991 to 2008 to explore new fisheries resources. This study examined the selectivity of bottom and floating traps and the analysis of yield-per-recruit (YPR) and biomass-per-recruit (BPR) providing helpful insight to the management of the shrimp Plesionika narval. A total of 28,262 specimens were sampled and the analysis of length at first capture returned higher values when using floating traps indicating that these traps are more selective, exerting less pressure on the resource...
October 24, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27783765/variability-study-of-entomopathogenic-nematode-populations-heterorhabditidae-from-argentina
#6
M F Achinelly, D P Eliceche, M N Belaich, P D Ghiringhelli
Entomopathogenic nematodes (EPN) belonging to the Heterorhabditidae family are lethal parasites of soil-dwelling insects. Two species were reported in Argentina: Heterorhabditis argentinensis and Heterorhabditis bacteriophora characterized mainly by morphometric features. In this work a comparative and phylogenetic study between five Heterorhabditis populations from Argentina was conducted to analyze the variability between strains and to evaluate the taxonomic position of Heterorhabditis argentinensis. The PCA analyses of morphometric characters separated the larger juvenile, female and male H...
October 24, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27783764/effects-of-changes-in-micro-weather-conditions-on-structural-features-total-protein-and-carbohydrate-content-in-leaves-of-the-atlantic-rain-forest-tree-golden-trumpet-tabebuia-chrysotricha
#7
B B Moura, P H Almeida, A G Balliana, J Y G Cobos, M Erbano, K A do Prado, S M Vudala, L Wosch, A B Pereira-Netto
Golden trumpet, Tabebuia chrysotricha, is a native tree from the Brazilian Atlantic rain forest, with a broad latitudinal distribution. In this study, we investigated the potential effects of short-term changes in micro-weather conditions on structural features, and total protein and carbohydrate content of golden trumpet leaves, using structural and histochemical approaches. Leaves were harvested in four different micro-weather conditions: 1. Afternoon, after a hot, sunny day; 2. at dawn, after a previously hot, sunny day; 3...
October 24, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27783763/spondias-tuberosa-arruda-anacardiaceae-a-threatened-tree-of-the-brazilian-caatinga
#8
J Mertens, J Germer, J A Siqueira, J Sauerborn
Spondias tuberosa Arr., a fructiferous tree endemic to the northeast Brazilian tropical dry forest called Caatinga, accounts for numerous benefits for its ecosystem as well as for the dwellers of the Caatinga. The tree serves as feed for pollinators and dispersers as well as fodder for domestic ruminants, and is a source of additional income for local smallholders and their families. Despite its vantages, it is facing several man-made and natural threats, and it is suspected that S. tuberosa could become extinct...
October 24, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27783762/chronic-effects-of-nitrogenous-compounds-on-survival-and-growth-of-juvenile-pink-shrimp
#9
W J Wasielesky, L H Poersch, T G Martins, K C Miranda-Filho
In response to growing worldwide market demand, intensive shrimp farming, based on high feed, has developed over the past decade. The nitrogenous compounds mainly generated by animal excretion can cause deterioration of water quality and produce chronic or even acute toxicity to aquatic animals. As prevention, theoretical safety levels have been estimated from acute toxicity tests and they are traditionally used to prevent toxic effects on biota. However, are those concentrations of nitrogenous compounds really safe to Farfantepenaeus paulensis? The current study aimed to investigate the lethal and sublethal effects of ammonia, nitrite and nitrate to juvenile F...
October 24, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27783761/seasonal-composition-abundance-and-biomass-of-the-subestuarine-fish-assemblage-in-sol%C3%A3-s-chico-r%C3%A3-o-de-la-plata-estuary-uruguay
#10
A Acuña Plavan, R Gurdek, N Muñoz, J M Gutierrez, M Spósito, P Correa, A Caride
The large estuaries can present long narrow branches called subestuaries or tidal creeks. These types of subsystems are distributed along the Uruguayan coast of the Río de la Plata estuary and are very important as nursery and refuge areas for fish. For the first time, the seasonal composition and abundance of the fish community of the Solís Chico subestuary was studied by using beach and gill nets. Fourteen species, mainly euryhaline (86%) presented a significant representation of juvenile stages. The fish community was dominated by Odontesthes argentinensis, Platanichthys platana, Mugil liza, Brevoortia aurea, Micropogonias furnieri and Paralichthys orbignyanus, similar to adjacent subestuaries...
October 24, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27783760/ecophysiological-interactions-and-water-related-physicochemical-parameters-among-freshwater-stingrays
#11
A T Oliveira, M L G Araújo, J R G Lemos, M Q C Santos, J Pantoja-Lima, P H R Aride, M Tavares-Dias, J L Marcon
The objective of this study was to compare and correlate the ecology of neonates and young individuals of Potamotrygon wallacei, Potamotrygon motoro and Paratrygon aiereba with regard to their hematological profile and the physicochemical parameters of the water that they inhabit. Principal component analysis (PCA) on the complete blood count revealed total variation of 72.92%, thus demonstrating a differentiation system for oxygen demand. On the other hand, P. motoro was considered to be an intermediate species, given that its complete blood count characteristics interacted with both P...
October 24, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27706397/vegetative-propagation-of-plukenetia-polyadenia-by-cuttings-effects-of-leaf-area-and-indole-3-butyric-acid-concentration
#12
R Solis, M Pezo, G Diaz, L Arévalo, D Cachique
The seeds of Plukenetia polyadenia have high levels of unsaturated fatty acids and are used as medicine and food for native people in the Peruvian and Brazilian Amazon. The objective of this study was to develop a method for vegetative propagation of Plukenetia polyadenia by rooting of cuttings. The experiment was laid out in a randomized complete block design with 12 treatments and 3 replications of 8 cuttings, in a 3 × 4 factorial arrangement. The factors were: 3 levels of leaf area (25, 50 and 75%) and 3 indole-3-butyric acid - IBA concentrations (9...
October 3, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27706396/wound-healing-potential-of-sebastiania-hispida-mart-pax-euphorbiaceae-ointment-compared-to-low-power-laser-in-rats
#13
E S Rizzi, D M Dourado, R Matias, J A I Muller, J F Guilhermino, A T G Guerrero, D L Moreira, B A K Silva, M Barbosa-Ferreira
Impaired wound healing represents a serious complication in some pathologies and the use of plant extracts has proved to improve tissue repair. The objectives of this study were to evaluate the healing potential of the ointment of Sebastiana hispida compared with Aluminum-Gallium Indium-Phosphide Laser (InGaAlP) in surgically induced wounds in rats and to perform the phytochemical analysis. The phytochemical analysis was performed in the classic way and also by HPLC. A controlled study was developed with 80 rats (200-250 g) in which a linear excision was performed in the dorsal region after shaving, measuring 2 cm × 1 cm (epidermis and dermis) exposing the muscle fascia...
October 3, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27706395/in-vitro-susceptibility-of-nematophagous-fungi-to-antiparasitic-drugs-interactions-and-implications-for-biological-control
#14
J N Vieira, F S Maia, G F Ferreira, J F Mendes, C L Gonçalves, M M Villela, D I B Pereira, P S Nascente
The fast anthelmintic resistance development has shown a limited efficiency in the control of animal's endoparasitosis and has promoted research using alternative control methods. The use of chemicals in animal anthelmintic treatment, in association with nematophagous fungi used for biological control, is a strategy that has proven to be effective in reducing the nematode population density in farm animals. This study aims to verify the in vitro susceptibility of the nematophagous fungi Arthrobotrys oligospora, Duddingtonia flagrans and Paecilomyces lilacinus against the antiparasitic drugs albendazole, thiabendazole, ivermectin, levamisole and closantel by using the Minimum Inhibitory Concentration (MIC)...
October 3, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27706394/variation-of-age-and-total-length-in-sotalia-guianensis-van-b%C3%A3-n%C3%A3-den-1864-cetacea-delphinidae-on-the-coast-of-esp%C3%A3-rito-santo-state-brazil
#15
J Y Lima, A P M Carvalho, C T Azevedo, L A Barbosa, L S Silveira
Variations of age and total length of Sotalia guianensis from the state of Espírito Santo, Brazil, were evaluated. Specimens were found stranded. Age and total length of 44 Guiana dolphins were assessed based on tooth analysis. Age varied between 0.5 year and 33 years (mean = 8.23 years). Most specimens were between zero and 6 years old (47%). Total length varied from 119 cm to 198 cm, with mean of 172.52 cm. Asymptotic length was reached at 185 cm and approximately 5-6 years of age. Mean total length and age were higher than in other regions of the distribution range of the species...
October 3, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27706393/aquatic-life-protection-index-of-an-urban-river-bacanga-basin-in-northern-brazil-s%C3%A3-o-lu%C3%A3-s-ma
#16
A K Duarte-Dos-Santos, M V J Cutrim, F S Ferreira, R Luvizotto-Santos, A C G Azevedo-Cutrim, B O Araújo, A L L Oliveira, J A Furtado, S C D Diniz
Bacanga River Basin faces environmental problems related to urbanization and discharge of untreated domestic sewage, which compromise its ecosystem health. Due to the small number of studies that assessed its water quality, the present study aimed to assess the current status of this ecosystem based on the aquatic life protection index. Samples were carried out every two months, in a total of six events, in six sites along the basin, where the water samples were collected to assess physicochemical parameters and calculate the trophic state index and the index of minimum parameters for the protection of aquatic communities...
October 3, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27683815/first-record-of-scobina-poeciloides-ashmead-1895-hymenoptera-argidae-for-brazil-and-update-of-geographical-distribution-of-three-species-of-scobina-lepeletier-serville-1828-for-the-state-of-rio-grande-do-sul
#17
J R A Lemes, A Köhler
It is recorded for the first time in the state of Rio Grande do Sul the occurrence of Scobina melanocephala (Lepeletier, 1823), Scobina thoracica (Jorgensen, 1913) and Scobina poeciloides (Ashmead, 1895), being this last the first record for Brazil. Scobina melanopyga (Klug, 1834) and Scobina torquata (Konow, 1903) were also found in the study. The analyzed material was collected utilizing Malaise traps in tobacco (Nicotiana tabacum L.) fields and is deposited at the Entomological Collection of Santa Cruz do Sul...
September 26, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27683814/the-impact-of-edge-effect-on-termite-community-blattodea-isoptera-in-fragments-of-brazilian-atlantic-rainforest
#18
C S Almeida, P F Cristaldo, D F Florencio, E J M Ribeiro, N G Cruz, E A Silva, D A Costa, A P A Araújo
Habitat fragmentation is considered to be one of the biggest threats to tropical ecosystem functioning. In this region, termites perform an important ecological role as decomposers and ecosystem engineers. In the present study, we tested whether termite community is negatively affected by edge effects on three fragments of Brazilian Atlantic Rainforest. Termite abundance and vegetation structure were sampled in 10 transects (15 × 2 m), while termite richness, activity, and soil litter biomass were measured in 16 quadrants (5 × 2 m) at forest edge and interior of each fragment...
September 26, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27683813/nematodes-associated-with-iguana-iguana-linnaeus-1758-squamata-iguanidae-in-semi-arid-areas-of-northeastern-brazil
#19
D A Teles, S V Brito, A A M Teixeira, S C Ribeiro, J A Araujo-Filho, V F Lima, A M A Pereira, W O Almeida
Nematodes were analyzed in Iguana iguana, a large lizard Iguanidae that is widely distributed throughout the Americas. The aims of the study were investigate the helminths associated with the lizard, I. iguana in semi-arid areas of northeastern Brazil and analyze the parasitological indices (prevalence, and mean intensity of infection). A total of 18 specimens of I. iguana were examined (8 males and 10 females). The overall prevalence of infection was 66.6% (12/18), while in males, it was 75% (6/8) and in females, 60% (6/10)...
September 26, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27683812/high-species-richness-of-native-pollinators-in-brazilian-tomato-crops
#20
C M Silva-Neto, L L Bergamini, M A S Elias, G L Moreira, J M Morais, B A R Bergamini, E V Franceschinelli
Pollinators provide an essential service to natural ecosystems and agriculture. In tomatoes flowers, anthers are poricidal, pollen may drop from their pore when flowers are shaken by the wind. However, bees that vibrate these anthers increase pollen load on the stigma and in fruit production. The present study aimed to identify the pollinator richness of tomato flowers and investigate their morphological and functional traits related to the plant-pollinator interaction in plantations of Central Brazil. The time of anthesis, flower duration, and the number and viability of pollen grains and ovules were recorded...
September 26, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
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