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Brazilian Journal of Biology, Revista Brasleira de Biologia

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https://www.readbyqxmd.com/read/28099575/evaluation-of-sperm-quality-snakes-erythrolamprus-poecilogyrus-sublineatus-cope-1860-serpentes-dipsadidae
#1
A C Silva, A S Varela, T F Cardoso, E F Silva, D Loebmann, C D Corcini
Erythrolamprus poecilogyrus sublineatus (Cope, 1860), is a species widely distributed in the Pampa Domain, occurring in Rio Grande do Sul, Argentina and Uruguay, mainlyin the pampa region. In the coastal region of southern Brazil this is serpent is considered one of the most abundant. The purpose of the present study is to describe the techniques of sperm evaluation in vitro for E. poecilogyrus sublineatus in the coastal plain of Rio Grande do Sul, Brazil. After laparatomy the efferent vases were collected and the semen was diluted in 1ml Beltsville Thawing Solution...
January 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28099574/anatomy-and-micromorphometric-analysis-of-leaf-catasetum-x-apolloi-benelli-grill-with-addition-of-potassium-silicate-under-different-light-sources
#2
L Eburneo, N G Ribeiro-Júnior, I V Karsburg, A A B Rossi, I V Silva
The aim of this study was to compare vitroplants Catasetum x apolloi grown under natural light and artificial light and different concentrations of potassium silicate, providing data on the anatomical differentiation that aids the acclimatization process of this species. Plants from in vitro seeding were used; 5 protocorms of approximately 0.5 cm were inoculated into vials with a capacity of 500 mL containing 100 mL of alternative culture medium plus potassium silicate (0.0, 0.5; 1.0 mL L-1), pH adjusted to 5...
January 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28099573/hematological-and-morphometric-differences-of-blood-cells-from-rheas-rhea-americana-struthioniformes-rheidae-on-two-conservation-farms
#3
S S M Gallo, N B Ederli, F C R Oliveira
Today, blood tests are an indispensable tool in avian medicine. This study aimed to describe and compare hematological and morphometric data of erythrocytes, leukocytes and thrombocytes of rhea, Rhea americana. To do so, 58 rheas of both sexes on two farms, one in Cachoeiro do Itapemirim, Espírito Santo (ES), and the other in São Carlos, São Paulo (SP), were selected. Blood samples were taken and their RBC counts, PCV and Hb levels were determined and used in hematimetric index calculations. The total and differentiated leukocyte counts and the TPP and fibrinogen serum levels were also obtained...
January 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28099572/occurrence-of-ants-hymenoptera-formicidae-in-banisteriopsis-laevifolia-a-juss-b-gates-malpighiaceae-in-s%C3%A3-o-paulo-state-brazil
#4
R Sebastiani, R T Fujihara, M Garcia
No abstract text is available yet for this article.
January 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28099571/first-report-of-the-parasitoid-pachycrepoideus-vindemmiae-rondani-1875-hymenoptera-pteromalidae-parasitizing-synthesiomyia-nudiseta-van-der-wulp-1883-diptera-muscidae
#5
C H Marchiori, L M F Borges
No abstract text is available yet for this article.
January 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28099570/variation-of-the-interphase-heterochromatin-in-artemia-crustacea-anostraca-of-the-americas-is-related-to-changes-in-nuclear-size-and-ionic-composition-of-hipersaline-habitats
#6
M Parraguez, G Gajardo
The populations of Artemia (or brine shrimp) from the Americas exhibit a wide variation in the amount of interphase heterochromatin. There is interest in understanding how this variation affects different parameters, from the cellular to the organismal levels. This should help to clarify the ability of this organism to tolerate brine habitats regularly subject to strong abiotic changes. In this study, we assessed the amount of interphase heterochromatin per nucleus based on chromocenter number (N-CHR) and relative area of chromocenter (R-CHR) in two species of Artemia, A...
January 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27925015/trends-in-freshwater-microcrustaceans-studies-in-brazil-between-1990-and-2014
#7
W M Silva, G Perbiche-Neves
This study presents a review of scientiometric data about freshwater microcrustaceans (Copepoda, Ostracoda, Branchiopoda: Cladocera, Anostraca, Notostraca and Conchostraca) in Brazil from 1990-2014. This review is based on 179 papers published across four databases, using the following keywords in the search: microcrustaceans, Copepoda, Cyclopoida, Calanoida, Harpacticoida, Ergasilidae, Daphniidae, Moinidae, Cladocera, Ostracoda, Conchostraca, zooplankton, reservoir, river, ponds, reservoirs, wetlands, caves, lakes, limnology, ecology, aquatic, taxonomy, systematics, morphology and biogeography...
December 1, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27925014/abundance-and-spatial-temporal-distribution-of-macrobrachium-surinamicum-holthuis-1948-palaemonidae-in-the-amazon-estuary-north-of-brazil
#8
D V Cavalcante, B S Bentes, J M Martinelli-Lemos
Macrobrachium surinamicum is a small shrimp that inhabits rivers of low salinity. It is mainly caught as bycatch in Amazon shrimp Macrobrachium amazonicum fisheries, which is widely exploited by artisanal fisheries for food and economic needs of the riverside population. This study aimed to characterize the spatial and temporal distribution of the freshwater shrimp M. surinamicum in the Guajará Bay and on Mosqueiro Island, correlating the abundance of this species with abiotic factors (temperature and salinity)...
December 1, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27849255/periphytic-algae-dynamics-in-lentic-ecosystems-in-the-brazilian-semiarid
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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