916 research outputs found
Levantamento De Coleópteros Bioluminescentes Na Mata Atlantica Da Serra Da Paranapiacaba
Brazil is the country with the largest number of bioluminescent beetle species in the world. However, estimates suggest that this number could much be higher, since many species remain to be discovered. In this work we made a survey of the species of bioluminescent beetles in Serra de Paranapiacaba – the largest remnant of Atlantic Forest in São Paulo State. The survey was done at Intervales State Park, Carlos Botelho State Park and municipality of Tapiraí and the following species were collected: Aspisoma lineatum, Aspisoma physonotum, Aspisoma fenestrata, Cratomorphus besckey, Cratomorphus distinctus, Photinus penai, Photinus sp1, Photinus sp9, Ethra aff. malledicta or axilaris, Ethra aff. adicta , Lucidotini incertae sedis, Cladodes flabellicornis, Cladodes demoulini, Amydetes lucernuta, Bicellonycha sp8, Bicellonycha ornaticollis, Pyrogaster lunifer, Pyrogaster moestus, Pyrogaster sp2, Pyrogaster sp5, Pyrogaster sp6, Photuris lugubris, Photuris sp1, Photuris sp7, Stenophrixotrix sp1, Brasilocerus sp1, Pseudophengodes sp1, Hapsodrilus pyrotis, Hypsiophtalmus sp1, Ptesimopsia luculenta, Pyroptesis cincticollis, Pyrearinus brevicolis, Pyrearinus candelarius, Pyrearinus micatus, Pyrophorus divergens. Our data show that Serra de Paranapiacaba is the second richest area in São Paulo state, especially in elaterids, with unique species typical of this area and species common to other investigated sites such as the Biological Station of Boracéia (in Saleso´ polis county) and the urbanized areas in the between Campinas - Sorocaba- São Paulo, originally covered to the Atlantic Rainforest. © 2015, Universidade Estadual de Campinas UNICAMP. All rights reserved.16
Modelling Anglerfish Discard behaviour in Spanish North Atlantic Coast Fisheries
Onboard sorting process for angler sh species in Spanish North Atlantic (ICES
VIIIc, IXa) coastal sheries is reviewed. The length e ect analysis across the years
sampled reveled an increasing trend in length of rst retention (L50) since 2000,
the year when Minimum Landing Weight (MLW 500g) were implemented. Speci c
di erences in the length-based sorting process were found, being the less valuable
white angler discarded at larger lengths than the black species; further, the analysis
found that discard decision is taken at narrower length range for black angler.
This results indicate that shers recognize angler species even at low length sizes,
conditioning the degree of adoption of MLW with regards to species relative market
value
Batch fecundity of Sardina pilchardus off the Iberian Peninsula
Batch fecundity, the number of eggs released per spawning event,
was determined for the first time in pilchard Sardina pilchardus
(Walb.) off the Atlantic coast of the Iberian Peninsula.
The mean relative fecundity (number of hydrated oocytes per gram
of female weight was 416 (standard deviation = 112.9).
Different regression models with Portuguese and Spanish data of
batch fecundity by weight are presented. A linear model weighted
least squares regression is established. The weighted regression
presents a homogeneous distribution of the variance, small mean
square error of the regression and highest R-squared, according
whit this expression:
F = -1260.8 + 444.43 W
Linear regression of batch fecundity by age for Portugal data is:
F = 30811.11 + 3711.88
Some applications of the bootstrap in Spanish Discards Sampling Scheme
Herein we propose a nested boostrap scheme to explore di erent sources
of variability in discard data. The proposed tool resamples on trips, hauls
within trips and lengthclasess within hauls to include all sources of variability identified in the Spanish DCR sampling program scheme. Megrim
(Lepidorhombus wiffiagonis) and Hake (Merluccius merluccius) discard
data collected in 2008 from OTB-51 metier operating in ICES Division
VI - VII, and Mediterranea DEF-Southern metier operating in the GSA
6S area were considered as case studies. Bootstrap Error and Coeficients
of Variation associated to mean discards per trip were obtained and compared with asymptotic estimates. Furthermore, we use the bootstrap to
quantify the contribution of the given sources of variability to global variability, and to assess simulated sampling scenarios differing each others
in sampling effort. The last application of this method is for detecting
outliers in 2008 sampled units (Trips). The good performance of the bootstrap method validates its use to obtain reliable error estimates in further
regression and/or classiffication studies on discard data
Produtividade Da Crotalaria Juncea Sob Podas E Densidades De Semeadura Nos Tabuleiros Costeiros Do Piauí
The northern region of Piauí state is an important center of irrigated organic fruit farming, wherein sandy soils with low organic matter content are predominant, besides climate with high temperatures, long periods of water deficit and constant wind. Given this situation, it becomes necessary to investigate alternative management options able to meet the challenges of agricultural productivity. In this context, green manuring becomes an important practice, mainly when using fast-growing species and with great potential for biomass production. Thus, a study was carried out at Embrapa Meio-Norte to measure Crotalaria juncea biomass yield after thinning and at various sowing densities. The evaluated parameters were plant height, stem diameter, number of branches per plant, fresh and dry weight of shoots and roots. The results showed that sowing density had no influence on plant height; however, unthinned plants reached greater heights, which might have been due to reduced competition for light. Thinning had no effect on diameters of plant stem base; on the other hand, lower planting densities promoted larger diameters also due to less competition. Likewise, the number of branches per plant was not affected by thinning, being greater at lower planting densities on account of less competition. Thinned plants achieved higher averages of fresh shoot weight. Nevertheless, shoot dry biomass was greater at higher planting densities. Furthermore, both fresh and dry weight of roots were not influenced by any of the adopted treatments. © 2016, Universidade Federal Rural do Semi-Arid. All rights reserved.29487888
Composição química e atividade antimicrobiana do óleo essencial de folhas e flores de Aloysia gratissima
Volatile oils from leaves and flowers of Aloysia gratissima were investigated for their chemical composition and antimicrobial activity against the bacteria Bacilus subtilis, Staphylococcus aureus, Salmonella choleraesuis, Pseudomonas aeruginosa, Streptococcus pneumoniae and the Candida albicans yeast. The minimum inhibitory concentrations (MIC) of the oils were determined by the micro-dilution method, while the chemical composition was determined by GC-MS (gas chromatography mass spectrometry). The fresh leaves and inflorescence were subjected to hydrodistillation for 120 min using a Clevenger-type apparatus, and the essential oil was tested against microorganisms. High concentrations of sesquiterpenes were observed for the inflorescence, and monoterpenes were observed for the leaves. The main compounds of the inflorescence essential oil were E-caryophyllene, germacrene B, guaiol and bulnesol, while in the leaves the main compounds were trans-pinocamphone, trans-pinocarveyl acetate, and guaiol. The essential oil from the leaves showed an effect against P. aeruginosa and S. pneumonia, and the essential oil of the inflorescence showed an effect against P. aeruginosa, S. pneumonia, and Candida albicans.O óleo essencial de folhas e de flores de Aloysia gratissima foi avaliado quanto à composição química e ação antimicrobiana contra as bactérias Bacilus subtilis, Staphylococcus aureus, Salmonella choleraesuis, Pseudomonas aeruginosa, Streptococcus pneumoniae, e a levedura Candida albicans. A concentração mínima inibitória (MIC) dos óleos essenciais foi determinada pelo método da microdiluição e a composição química determinada por CG-EM (Cromatografia Gasosa acoplada a Espectrômetro de Massas). Folhas e inflorescências frescas foram hidrodestiladas por 120 minutos em aparelho Clevenger sendo o óleo essencial testado contra microorganismos. Para as flores foi observada maior concentração de sesquiterpenos, enquanto que as folhas apresentaram maior concentração de monoterpenos. Os principais constituintes do óleo essencial da flor foram: E-cariofileno, germacreno B, guaiol e bulnesol; e das folhas foram: trans-pinocamfona, acetato de trans-pinocarveol e guaiol. O óleo essencial da folha mostrou atividade contra P. aeruginosa e S. pneumoniae, e o óleo essencial da flor mostrou atividade contra P. aeruginosa, S. pneumoniae e Candida albicans.583588Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES
tri-n-butyltin hydride-mediated radical reaction of a 2-iodobenzamide: Formation of an unexpected carbon-tin bond
Leonardo S. Santos. Instituto de Química de Recursos Naturales, Universidad de Talca, P.O. Box 747, Talca - Chile.The tri-n-butyltin hydride-mediated reaction of methyl 2,3-di-O-benzyl-4-O-trans-cinnamyl -6-deoxy-6-(2-iodobenzoylamino)-a-D-galactopyranoside afforded an unexpected aryltributyltin compound. The structure of this new tetraorganotin(IV) product has been elucidated by 1H, 13C NMR spectroscopy, COSY and HMQC experiments and electrospray ionization mass spectrometry (ESI-MS). The formation of this new compound via a radical coupling reaction and a radical addition-elimination process is discusse
Contact efficiency for lateral square mesh panels in a Spanish otter trawl: Does the lateral position enhance the fish contact probability?
Anglerfish (Lophius spp.) increasing discards in Spanish OTB fleet (VI-VII ICES). Juveniles availability or sampling artefact?
An update of the yearly estimates of angler sh (black angler (Lophius
budegassa) and white angler(Lophius piscatorius) discarded by the Spanish
bottom trawl operating in the Northeast Atlantic ocean are presented.
Black angler discards increased sharply in the last three year, while UShape
with a maximum in 2010 is found for white angler. A 2003 - 2010
sampling methodology review has beeen carried out without detecting any
shift in the protocol which could produce overestimation for recent years
discards. Fishing covariates related to black angler discard data also indicates
that shing practices remain stable along the series. We detect a
steady increase in the species rst length of retention L50 from 21; 5cm
in 2003 to a range 23cm - 25cm between 2004 - 2008 and 28cm since
2009. We conclude that interaction between the industry adoption of a
Minimum Weigth Landing (500g) and the strength of recruitment indices
explain the increase in amounts of angler discards
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