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Brazilian Journal of Biology, Revista Brasleira de Biologia

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https://www.readbyqxmd.com/read/30427384/fruit-availability-at-the-individual-and-local-levels-influences-fruit-removal-in-cecropia-pachystachya
#1
A B Navarro, A A A Bovo, E R Alexandrino, V C Oliveira, M A Pizo, K M P M B Ferraz
No abstract text is available yet for this article.
November 8, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30427383/ecotoxicological-risk-assessment-due-to-the-presence-of-bisphenol-a-and-caffeine-in-surface-waters-in-the-sinos-river-basin-rio-grande-do-sul-brazil
#2
G P Peteffi, J D Fleck, I M Kael, D C Rosa, M V Antunes, R Linden
Bisphenol A (BPA) is an emerging contaminant, regularly detected in aquatic ecosystems, considered as an endocrine disrupting compound (EDC). Caffeine is another chemical related to human activity, often found in surface waters. The objective of this study was to evaluate the ecotoxicological risk due to BPA and caffeine in water samples from the Sinos River basin, Rio Grande do Sul, Brazil. Water samples were collected at three sites monthly from May 9 th, 2016 to April 11th, 2017 (n = 36). BPA concentrations in water samples collected were in the range of not detected to 517 ng L-1 and caffeine concentrations in the range of 41...
November 8, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30427382/determination-of-acute-toxicity-of-ammonium-in-juvenile-patagonian-blenny-eleginops-maclovinus
#3
A Mardones, M González, C Rivas-Mancilla, R Vega, A Augsburger, F Encina, P De Los Ríos
Deionized ammonium (NH3) acute toxicity (LC50-96h) in Patagonian blenny juveniles (Eleginops maclovinus) was assessed. Concentrations of deionized ammonium in salt water were prepared by using 24.09 ± 2.1 g ammonium chloride (NH4Cl). Fish were exposed in triplicates to different ammonium concentrations: 0.05; 0.094; 0.175; 0.325 and 0.605 mg NH3 L-1. Additionally, a control group was included. Experimental fish were kept at a photoperiod of 16:8h. Average temperatures were 16.24 ± 1.40 °C. Oxygen concentration was 7...
November 8, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30427381/accidentally-catching-of-the-catfish-lophiosilurus-alexandri-steindachner-1876-larvae-in-aquariums-with-different-colors
#4
M M Pedreira, D C Costa, M Schorer
The aim of this study was to evaluate the effect of different colors in development and survival of catfish Lophiosilurus alexandri larvae, as well as over the visual ability of the handler. Larvae were placed in 5 L-aquariums at a density of 7 larvae L-1 , and aquariums had different colors, and were: green and blue (light colors); brown and black (dark colors). The final development; survival, total and standard length, weight and biomass of the larvae were similar in all colored aquaria. The highest mortality occurred during the first days after hatching, declining over the period, when it is observed the larval development, indicating that care should be necessary in the first few days...
November 8, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30427380/toxicity-bioassay-and-sub-lethal-effects-of-diazinon-on-blood-profile-and-histology-of-liver-gills-and-kidney-of-catfish-clarias-gariepinus
#5
A M Al-Otaibi, H F A Al-Balawi, Z Ahmad, E M Suliman
The catfish, Clarias gariepinus, was exposed to different acute concentrations (5-10 mg/l) of diazinon and the Lc50 value was recorded as high as 7.3 mg/l for 96 hours. The fishes exposed to three sub-lethal levels of diazinon (0.73, 1.095 and 1.46 mg/l) for 30 days showed that the pesticide induces changes in different blood parameters. Number of red blood cells (RBC), haemoglobin level and haematocrit values were elevated whereas white blood cells (WBC) count was reduced. Various blood indices like mean corpuscular volume (MCV), mean corpuscular haemoglobine (MCH) and mean corpuscular haemoglobine concentration (MCHC) vary insignificantly in the fish treated with diazinon...
November 8, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379207/microsatellite-multiplex-systems-for-brycon-orbignyanus-characiformes-bryconidae
#6
L C Carvalho, J M Ribeiro, G M Yazbeck
No abstract text is available yet for this article.
October 29, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379206/the-effect-of-replacement-of-fish-meal-with-amino-acids-and-optimized-protein-levels-in-the-diet-of-the-nile-tilapia-oreochromis-niloticus
#7
A-W Abdel-Warith, N Al-Asgah, Y El-Sayed, A El-Otaby, S Mahboob
This study was conducted to determine an appropriate replacement of fishmeal with amino acids (AAs) and optimized protein levels in practical diets for Oreochromis niloticus with mean initial body weight 12.52±0.63g. Six experimental and a control diet (total 7 diets) divided into two groups, and a control diet (D1) containing 32% protein. The first group contained three diets that included different dietary protein levels, viz. 20 (D2), 25 (D3), and 30% (D4) with AAs when replacing fishmeal by plant protein sources...
October 29, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379205/first-record-of-bulimulus-tenuissimus-mollusca-as-potential-experimental-intermediate-host-of-angiostrongylus-cantonensis-nematoda
#8
F G Martins, J S Garcia, E J L Torres, M A J Santos, C L Massard, J Pinheiro
Snails are essential to complete the life cycle of the metastrongylid nematode Angiostrongylus cantonensis, the causative agent of infections in domestic and wild animals, mainly rodents, and also of neural angiostrongyliasis or eosinophilic meningitis in humans. There are many reports of mollusks that can act as intermediate hosts of this parasite, especially freshwater snails and the African giant Achatina fulica. The terrestrial gastropod Bulimulus tenuissimus is widely distributed in Brazil and other species of the same genus occur in Brazil and other countries, overlapping regions in which there are reports of the occurrence of A...
October 29, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379204/role-of-synadenium-grantii-latex-proteases-in-nematicidal-activity-on-meloidogyne-incognita-and-panagrellus-redivivus
#9
E H Gomes, F E F Soares, D C Souza, L T Lima, B L Sufiate, T F Ferreira, J H Queiroz
Synadenium grantii is a Euphorbiaceae plant commonly found in Brazil, known as Janaúba or Leitosinha, whose latex is traditionally used for several purposes. However, it is not known whether the nematicidal action of this plant latex occurs due to the action of proteases. The present work aims to evaluate the nematicidal activity of proteases from Synadenium grantii latex on Meloidogyne incognita and Panagrellus redivivus. S. grantii latex used in the present study was collected from specimens found in Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil...
October 29, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379203/reproductive-biology-of-pequira-bryconamericus-stramineus-eigenmann-1908-in-funil-reservoir-mg-brazil
#10
L D S Murgas, M F Alves, W F Carneiro, V O Felizardo, R A Mello, G J Machado, E S Andrade, P S Pompeu
In order to evaluate aspects of reproductive biology of the "pequira" ( Bryconamericus stramineus) in the elevator of the Funil Dam - MG, fish capture was carried out from November 2008 to January 2009 and 317 individuals were collected. The mean standard length (SL) of the population was 4.96 cm and mean weight 1.80 g. The females had SL of 5.0 cm, while males had a SL of 4.6 cm. A sex ratio of 2.20: 1 (females: male) was observed. Our results show that 73% of the individuals analyzed were considered adults...
October 29, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379202/fish-consumption-on-the-amazon-a-review-of-biodiversity-hydropower-and-food-security-issues
#11
A Begossi, S V Salivonchyk, G Hallwass, N Hanazaki, P F M Lopes, R A M Silvano, D Dumaresq, J Pittock
The lack of knowledge about the majority of fish species harvested in Amazonian small-scale fisheries, in association with impacts from hydroelectric power plants, may lead to biodiversity loss and a decrease in the protein food supply for riverine Amazonians. This study uses existing datasets on fisheries and riverine developmental projects to infer effects associated with fish losses where actual data and outcomes are not available. The targeted fish species' status may be regarded as either threatened or there being no knowledge of their conservation requirements, biology or ecology...
October 29, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379201/aquatic-macrophytes-and-trophic-interactions-a-scientometric-analyses-and-research-perspectives
#12
C M C Rocha, D Lima, M C C Cunha, J S Almeida
Aquatic macrophytes have a recognized role in ecosystem structuring and an important position in trophic cascades interactions, whose understanding is to improve water quality. In recent years, the number of studies on the role of aquatic macrophytes in trophic webs and interactions has increased, but South America has made little progress in research in the area. In this study, we investigated the main gaps and perspectives for future studies on macrophytes and trophic interactions, analyzing global publications, especially those conducted by South American researchers...
October 29, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379200/phytochemical-screening-and-in-vitro-antibacterial-antifungal-antioxidant-and-antitumor-activities-of-the-red-propolis-alagoas
#13
F R G Silva, T M S Matias, L I O Souza, T J Matos-Rocha, S A Fonseca, K C Mousinho, A F Santos
The study aimed to evaluate the antimicrobial activity, antioxidant, toxicity and phytochemical screening of the Red Propolis Alagoas. Antimicrobial activity was evaluated by disk diffusion method. Determination of antioxidant activity was performed using the DPPH assay (1.1-diphenyl-2-picrylhydrazyl), FTC (ferric thiocyanate) and determination of phenolic compounds by Follin method. Toxicity was performed by the method of Artemia salina and cytotoxicity by MTT method. The phytochemical screening for the detection of allelochemicals was performed...
October 29, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379241/diet-selenium-improves-the-antioxidant-defense-system-of-juveniles-nile-tilapia-oreochromis-niloticus-l
#14
E G Durigon, D F Kunz, N C Peixoto, J Uczay, R Lazzari
From the advancement of tilapia production in recent years, diets are sought that allow the maximum growth, improving health and fish quality. In this study growth, biochemical, hematological and oxidative parameters were evaluated of tilapia fed with increasing selenium levels: 0.53, 0.86, 1.04 and 1.22 mg kg-1. It was used 400 juveniles (initial weight = 36.51 ± 10.88 g), fed for six weeks. There was no effect of selenium on fish growth, biochemical and hematological parameters. In the oxidative parameters, there was an increase in non-protein thiols and a decrease in malondialdehyde levels, evidencing antioxidant effects of selenium...
October 25, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379240/effect-of-photoperiod-on-ovarian-maturation-in-cheirodon-interruptus-teleostei-characidae
#15
I D García, S E Plaul, D Torres, P S Del Fresno, L A Miranda, D C Colautti
Cheirodon interruptus is a ubiquitous small characid that inhabits the Pampean region and commonly used as bait. Its vast market is supplied from the wild population causing a significant environmental impact. In this study, we assess the effect of photoperiod on ovarian maturation in order to evaluate its potential as a tool to manipulate reproduction under artificial conditions. Four treatments in triplicate (light: dark, L: D) were tested: 24L: 0D, 12L: 12D, 0L: 24D and a progressive photoperiod corresponding to the daily photoperiod increments in wild during winter-spring transition, accelerated three times...
October 25, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379239/study-on-assessment-of-proximate-composition-and-meat-quality-of-fresh-and-stored-clarias-gariepinus-and-cyprinus-carpio
#16
S Mahboob, K A Al-Ghanim, H F Alkahem Al-Balawi, F Al-Misned, Z Ahmed
The organoleptic evaluation and proximate analysis of Clarias gariepinus and Cyprinus carpio were determined in fresh fish and when refrigerated at two different temperatures (-21 °C and 4 °C) for a period of six weeks. A panel of twelve trained judges evaluated the color (live), texture, softness and flavor of fish meat after two minutes' steam cooking. Average score revealed a general decline in organoleptic properties such as color, texture, freshness, and taste of C. gariepinus and C. carpio stored at two temperatures compared to the fresh fish...
October 25, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379238/virulence-genes-in-escherichia-coli-isolates-from-commercialized-saltwater-mussels-mytella-guyanensis-lamarck-1819
#17
C A Barbosa, T A Conceição, M D Baliza, V M A Camilo, P J L Juiz, I M M Silva
The isolation of Escherichia coli from food is a major concern. Pathogenic strains of these bacteria cause diseases which range from diarrhea to hemolytic-uremic syndrome. Therefore the virulence genes in E. coli isolates from the mussel ( Mytella guyanensis) commercialized in Cachoeira, Bahia, Brazil were investigated. Samples were purchased from four vendors: two from supermarkets and two from fair outlets. They were conditioned into isothermal boxes with reusable ice and transported to the laboratory for analysis...
October 25, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30379237/genetic-variability-of-populations-of-the-white-eared-opossum-didelphis-albiventris-lund-1840-didelphimorphia-didelphidae-in-brazil
#18
D C Nascimento, B A T P Campos, E C Fraga, M C Barros
Didelphis albiventris are found throughout Northeast and Central Brazil to central-southern Uruguay and it was subject of few studies in a population level. Given this, the present study investigated the genetic variability of the species using the mitochondrial molecular marker cytochrome oxidase c subunit I. We analyzed samples from the different biomes within three Brazilian regions: Northeast (Caatinga , Cerrado, and Atlantic Forest), Southeast (Cerrado , Atlantic Forest, Cerrado/Atlantic Forest, and Cerrado/Caatinga ecotones) and South (Pampa and Atlantic Forest)...
October 25, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30365637/pollen-as-a-component-of-the-diet-of-doru-luteipes-scudder-1876-dermaptera-forficulidade
#19
R C Marucci, I L Souza, L O Silva, A M Auad, S M Mendes
The properties of maize pollen in the diet of Doru luteipes were determined by biological responses of the predator feeding on natural preys and artificial diet. The biological parameters of D. luteipes fed on Spodoptera frugiperda (Smith, 1797) eggs, maize pollen, Rhopalosiphum maidis (Fitch, 1856) + maize pollen and R. maidis were assessed. The effect of pollen on artificial diet on the biological variables of the predator nymphs and adults were also evaluated. Time span of nymphal development was greater for D...
October 18, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/30365636/density-dependent-seed-predation-in-attalea-geraensis-barb-rodr-arecaceae-caused-by-bruchid-beetles-in-the-brazilian-cerrado
#20
J Ragusa-Netto
Palms are an important component of Neotropical communities as they are often diverse and abundant. In some areas, palms occur in high density and act as limiting factor in tree recruitment by limiting tree seedling and sapling abundance. In this study, I evaluated the intensity of seed mortality caused by insects in Attalea geraensis, in a large area of preserved Cerrado (Serra do Cabral, MG, Brazil) during wet season when both A. geraensis fruits and bruchid beetles were abundant. I collected a total of 63 infructescences which had from 3 fruits and 7 seeds to 82 fruits and 251 seeds...
October 18, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
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