Revista brasileira de biologia最新文献_第9页

Lepidopteran caterpillar fauna on lactiferous host plants in the central Brazilian cerrado. 巴西塞拉多中部鳞翅目毛虫在乳汁寄主植物上的区系。

Revista brasileira de biologia Pub Date : 1999-11-01 DOI: 10.1590/s0034-71081999000400012

I R Diniz, H C Morais, A M Botelho, F Venturoli, B C Cabral

{"title":"Lepidopteran caterpillar fauna on lactiferous host plants in the central Brazilian cerrado.","authors":"I R Diniz, H C Morais, A M Botelho, F Venturoli, B C Cabral","doi":"10.1590/s0034-71081999000400012","DOIUrl":"https://doi.org/10.1590/s0034-71081999000400012","url":null,"abstract":"Nine lactiferous plants of five families were examined for caterpillars in a 4 ha cerrado sensu stricto (savanna-like vegetation) area of the University of Brasília Experimental Farm (DF, Brazil), from August 1995 to May 1997. In 5,540 censuses, less than 5% of the plants hosted caterpillars. All the caterpillars found, a total of 55 species in 15 families were reared under laboratory conditions. Pyralidae, Geometridae, Elachistidae, Megalopygidae, and Limacodidae were the richest caterpillar families recorded. Of the 55 species, more than 40% were polyphagous, feeding on different host plant families, while 21 were considered rare species with less than four records during the study period. The species' rareness did not permit any analysis of diet breadth. The presence of latex in the host plants seems to affect both the proportion of host plants with caterpillars (abundance) and the caterpillar species richness. The habit of eating plants that characteristically produce latex occurs in several distantly-related lepidopteran families. The results support the argument that specific behaviors to circumvent plant latex defense may have arisen independently many times in the Lepidoptera.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"59 4","pages":"627-35"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s0034-71081999000400012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31317204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

[The occurrence, distribution and toxicity of cyanobacteria in the estuary of Lagoa dos Patos, Rio Grande do Sul]. [南里奥格兰德州拉戈阿多斯帕托斯河口蓝藻的发生、分布和毒性]。

Revista brasileira de biologia Pub Date : 1999-08-01 DOI: 10.1590/s0034-71081999000300002

A Matthiensen, J S Yunes, G A Codd

{"title":"[The occurrence, distribution and toxicity of cyanobacteria in the estuary of Lagoa dos Patos, Rio Grande do Sul].","authors":"A Matthiensen, J S Yunes, G A Codd","doi":"10.1590/s0034-71081999000300002","DOIUrl":"https://doi.org/10.1590/s0034-71081999000300002","url":null,"abstract":"Several blooms of Microcystis aeruginosa have been observed in the Patos Lagoon estuary during the last fifteen years without a proper investigation of their ecological importance or possible toxicity. The present study has identified and quantified the presence of cyanobacteria in the Patos Lagoon estuary, particularly of M. aeruginosa. During this survey, identification and quantification of the main phytoplankton groups were done in relation to geographical distribution in the estuary. The presence of M. aeruginosa colonies in the estuarine region confirmed their superficial distribution throughout the estuarine waters during twelve months with a maximum of 1, 3.10(6) cells. L-1 in December, 1994 and a minimum of 1, 5.10(5) cells. L-1 in August, 1995 and also confirmed that M. aeruginosa originated from waters in the north of the estuary. The period of the highest cell and colonies densities was coincident with high chlorophyll-a levels in surface waters. Toxicity of M. aeruginosa bloom material was determined by bioassay and concentrations of hepatotoxins microcystins were identified by HPLC-DAD. M. aeruginosa blooms were considered highly toxic, presenting a 24 h-LD50 lower than 100 mg.Kg-1 b.w. and a toxin content higher than 1 microgram.mg-1 d.w. Several microcystin variants were found in the extracts with microcystin-LR predominating.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"59 3","pages":"361-76"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21616225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Morphometrical aspects of adults of Gratiana spadicea (Klug) Coleoptera, Chrysomelidae) from Southern Uruguay 乌拉圭南部灰蝶蛾成虫的形态特征。鞘翅目，金蝶科

Revista brasileira de biologia Pub Date : 1999-08-01 DOI: 10.1590/S0034-71081999000300008

R. León, G. Failla, E. Morelli

引用次数: 4

Mitogenic activity of fetal bovine serum, fish fry extract, insulin-like growth factor-I, and fibroblast growth factor on brown bullhead catfish cells--BB line. 胎牛血清、鱼苗提取物、胰岛素样生长因子- 1和成纤维细胞生长因子对褐头鲶鱼BB系细胞有丝分裂活性的影响。

Revista brasileira de biologia Pub Date : 1999-08-01 DOI: 10.1590/s0034-71081999000300017

J E Cyrino, D R Mulvaney

{"title":"Mitogenic activity of fetal bovine serum, fish fry extract, insulin-like growth factor-I, and fibroblast growth factor on brown bullhead catfish cells--BB line.","authors":"J E Cyrino, D R Mulvaney","doi":"10.1590/s0034-71081999000300017","DOIUrl":"https://doi.org/10.1590/s0034-71081999000300017","url":null,"abstract":"Bioassays were performed to assess the effects of different levels of growth medium supplementation with fetal bovine serum (FBS), fish fry extract (FE), combinations of FBS and FE, and addition of insulin-like growth factor I (IGF-I) and fibroblast growth factor (FGF) on the proliferation of brown bullhead catfish cells (BB line). Treatments (n = 4) were: 2.5, 5, 10, and 15.0% FBS or FE and 5/2.5, 5/5, 10/2.5, and 10/5 of a FBS/FE combination as supplement to the growth medium, or the addition of 0.1, 1, 2.5, 10, 25, and 75 ng/ml of either IGF-I or FGF to the growth media. Initial cell density was 1.1 x 10(6) cells per well on uncoated 24-well plates. Incubation temperature was 29.5 +/- 0.7 degrees C. Six hours after plating, initial culture medium was removed, plates rinsed with Dulbecco's phosphate buffered saline, treatment media added, and cells allowed to proliferate for 24 hours. Another bioassay was performed with rat myoblast omega cells (RMo) using the same levels of growth medium supplemented with FBS, FE and FBS/FE. Base growth medium was Dulbecco's MEM. The initial cell density was 7.2 x 10(6) cells per well, and the bioassay was carried out at 36.0 +/- 0.5 degrees C, on a 95% air, 5% CO2 incubator. Increasing levels of FBS had a positive effect (P < 0.05) on the proliferation of both BB and RMo cells. Increasing levels of FE had a negative effect (P < 0.05) on the proliferation of BB cells and totally inhibited the proliferation of RMo cells at any level of supplementation. Higher levels of FE on the FBS/FE combinations presented a negative effect on the proliferation of both BB and RMo cells (P < 0.05). Insulin-like growth factor I had a positive quadratic effect (P < 0.05) on the proliferation of BB cells. Apparently, mammalian growth factors slightly stimulated mitogenic activity in fish cells, while FE contained factors which inhibited the mitogenic activity of RMo and BB cell lines.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"59 3","pages":"517-25"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s0034-71081999000300017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21616226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Gill infection of Leporinus macrocephalus Garavello & Britski, 1988 (Osteichthyes: Anostomidae) by Henneguya leporinicola n. sp. (Myxozoa: Myxobolidae). Description, histopathology and treatment. 1988年大头Leporinus Garavello & Britski鳃部感染(骨鱼目:鼻虫科)。描述、组织病理及治疗。

Revista brasileira de biologia Pub Date : 1999-08-01 DOI: 10.1590/s0034-71081999000300018

M L Martins, V N de Souza, J R de Moraes, F R de Moraes

{"title":"Gill infection of Leporinus macrocephalus Garavello & Britski, 1988 (Osteichthyes: Anostomidae) by Henneguya leporinicola n. sp. (Myxozoa: Myxobolidae). Description, histopathology and treatment.","authors":"M L Martins, V N de Souza, J R de Moraes, F R de Moraes","doi":"10.1590/s0034-71081999000300018","DOIUrl":"https://doi.org/10.1590/s0034-71081999000300018","url":null,"abstract":"Piauçus (Leporinus macrocephalus), were raised in 300 m2 ponds (density of 10 fish/m2) presenting asphyxia signals and daily mortality of 27 fishes. Specimens with 8-cm total body length, were collected for necropsy. Mucus of body surface and pieces of organs were collected and examined microscopically, in wet mounts, stained or in histological sections. The smears examination showed the presence of several spores in the secondary lamellae of the gill filaments, identified as Henneguya leporinicola n.sp (Myxozoa: Myxobolidae). Histopathological study showed epithelial hyperplasia and fulfilling of the spaces between the secondary lamellae, congestion and telangiectasia sinusoidal. It was also observed hyperplasia of the goblet cells and several cysts of parasite with 70.3 microns diameter. Such cysts were situated among the secondary lamellae, covered or not by the hyperplasic epithelium. With this diagnostic, three applications of formalin solution 10 ml/m3 were carried out. Fifteen days after that, fish were examined again to ascertain whether the treatment was efficient on disease caused by the protozoa. The tissue alterations present in the gills after the treatment were just a moderate sinusoidal congestion and a slight epithelial hyperplasia on the base of the secondary lamellae.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"59 3","pages":"527-34"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s0034-71081999000300018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21616227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 52

Actual and potential heterotrophicneutrogen fixation and detrification rates of oryza glumaepatula Steud in an amazonian lake 亚马逊河流域湖泊中谷草的实际和潜在异养固氮和脱氮速率

Revista brasileira de biologia Pub Date : 1999-08-01 DOI: 10.1590/S0034-71081999000300013

A. Enrich-Prast, F. Esteves, D. Biesboer

{"title":"Actual and potential heterotrophicneutrogen fixation and detrification rates of oryza glumaepatula Steud in an amazonian lake","authors":"A. Enrich-Prast, F. Esteves, D. Biesboer","doi":"10.1590/S0034-71081999000300013","DOIUrl":"https://doi.org/10.1590/S0034-71081999000300013","url":null,"abstract":"Foram estimadas taxas reais e potenciais de fixacao heterotrofica de nitrogenio (FHN) e de desnitrificacao pela metodologia da reducao de acetileno e inibicao por acetileno, respectivamente. Estas taxas foram determinadas para raizes e colmos de uma especie selvagem de arroz, Oryza glumaepatula , presente no lago Batata, um ecossistema impactado pelo lancamento de rejeito de bauxita. Foram escolhidas duas estacoes de coleta no lago Batata: uma localizada na area natural e outra localizada na area impactada por rejeito de bauxita. Os experimentos foram realizados nos dois periodos mais representativos do pulso hidrologico: seca (dezembro) e cheia (julho). Foram determinadas: a) taxas reais de FHN e desnitrificacao e b) taxas potenciais de FHN apos a adicao de glicose de taxas potenciais de desnitrificacao apos a adicao de glicose, nitrato e nitrato + glicose. O processo de FHN excede o processo de desnitrificacao nesse sistema. Os processos de FHN e de desnitrificacao foram maiores em raizes do que em colmos de O. glumaepatula , porem nenhuma correlacao foi encontrada entre estas taxas e a profundidade da agua. Verificou-se que a glicose e o nitrato foram os fatores controladores dos processo de FHN e desnitrificacao, respectivamente, em raizes e colmos de O. glumaepatula . Os processos de HNF e desnitrificacao em perifiton associado a O. glumaepatula parecem nao apresentar diferencas entre as areas impactada e nao-impactada.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"59 1","pages":"477-484"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67176376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Morphological description of the developmental stages of Parauchenipterus galeatus (Linnaeus, 1766) (Siluriformes, Auchenipteridae) on the floodplain of the upper Paraná River Parauchenipterus galeatus (Linnaeus, 1766)(志留目，Auchenipteridae)在paran<s:1>河上游漫滩上发育阶段的形态学描述

Revista brasileira de biologia Pub Date : 1999-08-01 DOI: 10.1590/S0034-71081999000300007

P. Sanches, K. Nakatani, A. Bialetzki

引用次数: 52

Influence of bauxite tailings on the structure of the benthic macroinvertebrate community in an Amazonian Lake (Lago Batata, Pará - Brazil) 铝土矿尾矿对亚马逊湖(巴西巴塔塔湖)底栖大型无脊椎动物群落结构的影响

Revista brasileira de biologia Pub Date : 1999-08-01 DOI: 10.1590/S0034-71081999000300004

J. Fonseca, F. Esteves

{"title":"Influence of bauxite tailings on the structure of the benthic macroinvertebrate community in an Amazonian Lake (Lago Batata, Pará - Brazil)","authors":"J. Fonseca, F. Esteves","doi":"10.1590/S0034-71081999000300004","DOIUrl":"https://doi.org/10.1590/S0034-71081999000300004","url":null,"abstract":"This research was developed between 1993 and 1996, aiming to study the structure of the benthic macroinvertebrate community, relating it to some abiotic variables, in an amazonian lake (lago Batata), that received for ten years a great amount of bauxite tailings. The benthic macroinvertebrates were collected with a core and the abiotic variables that were measured were: dissolved oxygen, suspended material, depth, transparency (secchi disc), temperature of the water column and total nitrogen, available phosphorus and organic matter in the sediment. With the use of a Principal Components Analysis (PCA), we were able to show that the sampling sites differed regarding the abiotic variables, especially total-N, available-P and organic matter in the sediment, all of which were found in greater concentrations in the natural areas. The PCA concerning the benthic macroinvertebrate community also distinguished the natural sites from the impacted one. The impacted site was positively grouped with the Ephemeroptera (Campsurus sp.) and the natural sites were grouped together with the Chironomidae, Chaoboridae, Oligochaeta and Bivalvia. The results achieved in this research made clear that the sites under influence of the bauxite tailings had alterations of their abiotic characteristics and of their benthic macroinvertebrate structure.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"59 1","pages":"397-405"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S0034-71081999000300004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67176194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Aspectos cinéticos da degradação de laminados de madeiras em ambientes aquático e terrestre 层压板在水生和陆地环境中降解的动力学方面

Revista brasileira de biologia Pub Date : 1999-08-01 DOI: 10.1590/S0034-71081999000300014

F. Aprile, W. Delitti, I. Bianchini

{"title":"Aspectos cinéticos da degradação de laminados de madeiras em ambientes aquático e terrestre","authors":"F. Aprile, W. Delitti, I. Bianchini","doi":"10.1590/S0034-71081999000300014","DOIUrl":"https://doi.org/10.1590/S0034-71081999000300014","url":null,"abstract":"Decomposition rates of several wood especies was evaluated under aquatic and terrestrial environment in the Atlantic forest. Wood samples from five species were placed to decompose on the forest floor and twelve of them submerged in a lake, using the litter bags approach to evaluate directly the monthly progressive weight loss. Under lake conditions the decomposition presented tipical a initial period with faster weight loss due to leaching. Correlation analysis showed that wood color is inversely related with decomposition rates of angiosperms (r = - 0,95), but wood density is not a good predectivy variable. Decomposition was faster in the aquatic environment, as shown by coefficient K (Olson, 1963) verified for Torresea cearensis 0,63; Cordia goeldiana 0,61; Myroscarpus sp. 0,46; Cedrela sp. 0,35; Swietenia macrophyla 0,31; Araucaria angustifolia 0,28; Pinus sp. 0,26; Phoebe porosa 0,22; Machaerium villosum 0,22; Dalbergia nigra 0,21; Peltogyne discolor 0,20; and Ocotea sp. 0,19. The forest floor values was the following: Torresea cearensis 0,48; Cordia goeldiana 0,43; Phoebe porosa 0,20; Cedrela sp. 0,20; and Pinus 0,16.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"59 1","pages":"485-492"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S0034-71081999000300014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67176490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Estrutura vegetal e grau de perturbação dos manguezais da Lagoa da Tijuca, Rio de Janeiro, RJ, Brasil 巴西里约热内卢里约热内卢的Lagoa da Tijuca红树林的植物结构和扰动程度

Revista brasileira de biologia Pub Date : 1999-08-01 DOI: 10.1590/S0034-71081999000300016

M. G. L. Soares

{"title":"Estrutura vegetal e grau de perturbação dos manguezais da Lagoa da Tijuca, Rio de Janeiro, RJ, Brasil","authors":"M. G. L. Soares","doi":"10.1590/S0034-71081999000300016","DOIUrl":"https://doi.org/10.1590/S0034-71081999000300016","url":null,"abstract":"The Tijuca Lagoon is located south of Rio de Janeiro City. It is bordered by a discontinued and narrow belt of mangrove trees. Mangrove forests have a high structural variability. Of the eighteen stands studied there are monospecifics stands of Laguncularia racemosa with dbh between 3.4 and 7.7 cm and height between 4.5 and 7.7 m, dominated by trees with dbh less than 10.0 cm. At the other stands, occur mixed forests, structuraly more developed, sometimes dominated by Laguncularia racemosa, sometimes by Rhizophora mangle (dbh between 7.8 and 16.7 cm; height between 6.8 and 16.1 m, prevailing trees with dbh greater than 10.0 cm). There are also mixed stands dominated by Avicenia schaueriana (dbh of 7.1 cm and 5.3 m high, predominating individuals over 10.0 cm in dbh). The structural variability observed, is strong evidence of an altered landscape. Observations on mangrove forests at southeastern Brazil show that stands dominated by Laguncularia racemosa with low dbh are typical of degraded sites in process of restoration. The structure that is quite close to that of the original forest is represented by the most developed stands (high dbh and height). One of the studied stands, with mature forest of Rhizophora mangle, high developed for the structural patterns of mangrove at the southeastern Brazil is jeopardized by the invasion of Acrostichum sp., wich is preventing the development of R.mangle saplings. This invasion is related to a high deposition of mud, wich rose the substrate, reducing tide inundation.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"59 1","pages":"503-515"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S0034-71081999000300016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67176815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 76