Revista brasileira de biologia最新文献_第5页

Home range of a Geoffroy's marmoset group, Callithrix geoffroyi (Primates, Callitrichidae) in South-eastern Brazil. 巴西东南部Geoffroy's狨猴群，Callithrix geoffroyi(灵长类动物，calitrichiae)的家园范围。

Revista brasileira de biologia Pub Date : 2000-05-01 DOI: 10.1590/s0034-71082000000200011

Passamani, Rylands

引用次数: 18

Electrofishing as a sampling technique for coastal stream fish populations and communities in the Southeast of Brazil. 电钓作为巴西东南部沿海溪流鱼类种群和群落的采样技术。

Revista brasileira de biologia Pub Date : 2000-05-01 DOI: 10.1590/s0034-71082000000200003

Mazzoni, Fenerich-Verani, Caramaschi

{"title":"Electrofishing as a sampling technique for coastal stream fish populations and communities in the Southeast of Brazil.","authors":"Mazzoni, Fenerich-Verani, Caramaschi","doi":"10.1590/s0034-71082000000200003","DOIUrl":"https://doi.org/10.1590/s0034-71082000000200003","url":null,"abstract":"Electrofishing adequacy was tested as a technique to obtain quantitative data of coastal stream fish populations and communities in the Southeast of Brazil. Seven field trips, between July/94 and July/95, were done in 5 localities of the Ubatiba fluvial system (Maricá, RJ). Seventeen species, among the 22 collected, had their numbers estimated through the Zipping method, the model used to test the sampling methodology. At each field trip, three removals with electrofishing were done in each locality and, according to the number of obtained species at each locality/field trip, we analysed 315 cases. Nineteen cases, among 315, showed failure condition. Estimates were significant (p < 0.01) in 96% of the studied cases. Non-significant cases were obtained for rare species due to over and randomly efficient electrofishing in 63.3% and 36.4% of the cases, respectively. No correlation was found between catchability and the estimated number of individuals and/or environmental characteristics. High values for sampling efficiency (> 85%) were found for all estimates. An experimental analyses were done for one locality and, the comparison between the estimates for 3 and 6 successive removals showed a mean error and a standard deviation of 5.5% and 2.1% respectively. Therefore, it can be concluded that electrofishing was an efficient method for quantitative data analysis of fish populations and communities in the Ubatiba fluvial system.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"60 2","pages":"205-216"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s0034-71082000000200003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21794330","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: 82

Conservation value of a native forest fragment in a region of extensive agriculture. 粗放农业地区原生森林片段的保护价值。

Revista brasileira de biologia Pub Date : 2000-05-01 DOI: 10.1590/s0034-71082000000200007

Chiarello

{"title":"Conservation value of a native forest fragment in a region of extensive agriculture.","authors":"Chiarello","doi":"10.1590/s0034-71082000000200007","DOIUrl":"https://doi.org/10.1590/s0034-71082000000200007","url":null,"abstract":"A survey of mammals and birds was carried out in a semi-deciduous forest fragment of 150 ha located in a zone of intensive agriculture in Ribeirão Preto, State of São Paulo, south-eastern Brazil. Line transect sampling was used to census mammals and birds during six days, totalling 27.8 km of trails and 27.8 hours of observation. Twenty mammal species were confirmed in the area (except bats and small mammals), including rare or endangered species, such as the mountain lion (Puma concolor), the maned wolf (Chrysocyon brachyurus), and the ocelot (Leopardus pardalis). The brown capuchin monkey (Cebus apella) and the black-tufted-ear marmoset (Callithrix penicillata) were found frequently, suggesting high population density in the fragment. Regarding the avifauna, 49 bird species were recorded, most of them typical of open areas or forest edges. Some confirmed species, however, are becoming increasingly rare in the region, as for example the muscovy duck (Cairina moschata) and the toco toucan (Ramphastos toco). The results demonstrate that forest fragment of this size are refuges for native fauna in a region dominated almost exclusively by sugar-cane plantations. Besides faunal aspects, the conservation of these fragments is of great importance for the establishment of studies related to species preservation in the long term, including reintroduction and translocation projects, as well as studies related to genetic health of isolated populations.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"60 2","pages":"237-247"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s0034-71082000000200007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21795430","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: 69

Ventilatory flow relative to intrabuccal and intraopercular volumes in the serrasalmid fish Piaractus mesopotamicus during normoxia and exposed to graded hypoxia. 在正常缺氧和暴露于分级缺氧时，mesopotamicus Piaractus serrasalmid鱼相对于眶内和眼内容积的通气流量。

Revista brasileira de biologia Pub Date : 2000-05-01 DOI: 10.1590/s0034-71082000000200008

Kalinin, Severi, Guerra, Costa, Rantin

{"title":"Ventilatory flow relative to intrabuccal and intraopercular volumes in the serrasalmid fish Piaractus mesopotamicus during normoxia and exposed to graded hypoxia.","authors":"Kalinin, Severi, Guerra, Costa, Rantin","doi":"10.1590/s0034-71082000000200008","DOIUrl":"https://doi.org/10.1590/s0034-71082000000200008","url":null,"abstract":"Ventilation volume Vg - mlH2O.min-1 ), respiratory frequency (fR - breaths.min-1) and tidal volume (VT - mlH2O.breath-1 ) were measured in a group of Piaractus mesopotamicus (650.4 +/- 204.7 g; n = 10) during normoxia and in response to graded hypoxia. The fR was maintained constant, around 100 breaths.min-1, from normoxia until the O2 tension of the inspired water (PiO2) of 53 mmHg, below which it increased progressively, reaching maximum values (157.6 +/- 6.3 breaths.min-1) at 10 mmHg. The VT rose from 1.8 +/- 0.1 to 6.0 +/- 0.5 and 5.7 +/- 0.4 mlH2O. breath-1 in the PiO2 of 16 and 10 mmHg, respectively. The Vg increased from 169.3 11.0 (normoxia) to 940.1 +/- 85.6 mlH2O. min-1 at the PiO2 of 16 mmHg, below which it also tended to decrease. A second group of fish (29 to 1510.0 g, n = 34) was used for the evaluation of allometric relationships concerning ventilation and dimensions of the buccal and opercular cavities. At maximum Vg, the VT corresponded to 93.2 +/- 2.4% of the buccal volume and 94.9 2.3% of the opercular volume, suggesting that the Vg of P. mesopotamicus is limited by the volumes of buccal and opercular cavities in severe hypoxia.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"60 2","pages":"249-254"},"PeriodicalIF":0.0,"publicationDate":"2000-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s0034-71082000000200008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21795431","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

Preliminary assessment of heavy metal levels in Mytella falcata (Bivalvia, Mytilidae) from Bacanga River estuary, São Luís, state of Maranhão, northeastern Brazil. 巴西东北部maranh<e:1> o州<s:1> o Luís巴干加河河口法尔卡Mytella falcata (Bivalvia, Mytilidae)重金属水平的初步评估

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100003

G P de Carvalho, P R Cavalcante, A C de Castro, M O Rojas

引用次数: 29

Reproductive ecology of the blue crab, Callinectes danae Smith, 1869 in the Conceição Lagoon system, Santa Catarina Isle, Brazil. 蓝蟹，Callinectes danae Smith, 1869年在巴西圣卡塔琳娜岛的conception <s:1>泻湖系统中的繁殖生态学。

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100004

J O Branco, S Masunari

引用次数: 70

Patterns of gall-forming in Ossaea confertiflora (Melastomataceae) by Lopesia brasiliensis (Diptera: Cecidomyiidae) in an area of Atlantic Rainforest in southeastern Brazil. 巴西东南部大西洋雨林地区巴西绵蝇(双翅目:绵蝇科)产瘿模式。

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100018

D Vrcibradic, C F Rocha, R F Monteiro

引用次数: 9

Growth of Nile tilapia Oreochromis niloticus fed with different levels of alcohol yeast. 不同浓度酒精酵母对尼罗罗非鱼生长的影响。

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100014

V Medri, G V Pereira, J H Leonhardt

{"title":"Growth of Nile tilapia Oreochromis niloticus fed with different levels of alcohol yeast.","authors":"V Medri, G V Pereira, J H Leonhardt","doi":"10.1590/s0034-71082000000100014","DOIUrl":"https://doi.org/10.1590/s0034-71082000000100014","url":null,"abstract":"Two hundred and forty 45-day-old fingerlings of Nile tilapia (Oreochromis niloticus), sexually reverted with an initial average weight of 1.25 +/- 0.14 g, distributed in a totally casualized delineation, during 330 days. The effect of the substitution of 10%, 20% and 30% of the ration by distillery yeast (Saccharomiyces cerevisae) in balanced experimental rations on the development in the breeding of tilapias did not show a harmful effect up to the maximum tested level of 30%, showing that the choice of the yeast in the ration for these fishes depends on the availability and occasional cost. The yeast provides fish with good resistance to unfavorable environmental conditions, which could be verified since there were no statistical differences among the treatments with different levels of yeast and the witness. The long growth rate in terms of length and weight can be attributed to the little available space for each specimen, not obeying the limit of populational density, as well as reduction of food ingestion, which coincide with the winter season, above of the absence of natural feeding.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"60 1","pages":"113-21"},"PeriodicalIF":0.0,"publicationDate":"2000-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s0034-71082000000100014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21683188","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: 16

Clustering behavior of hermit crabs (Decapoda, Anomura) in an intertidal rocky shore at São Sebastião, southeastern Brazil. 巴西东南部<s:1> o sebasti<e:1>潮间岩岸寄居蟹(十足目，反常目)的聚类行为。

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100006

A Turra, F P Leite

{"title":"Clustering behavior of hermit crabs (Decapoda, Anomura) in an intertidal rocky shore at São Sebastião, southeastern Brazil.","authors":"A Turra, F P Leite","doi":"10.1590/s0034-71082000000100006","DOIUrl":"https://doi.org/10.1590/s0034-71082000000100006","url":null,"abstract":"The clustering behavior and cluster composition of hermit crabs as well as the patterns of shell utilization of clustered and scattered individuals were studied. This study was conducted in the intertidal region of Grande Beach, São Sebastião, southeastern Brazil. Samples were taken both in randomized transects and 1 m2 quadrats during low tide periods. Crabs were counted, measured (shield length), and sexed. Shells were identified and had their adequacy and condition (physical damage and incrustation) recorded. Clusters occurred mainly in air exposed areas and were dominated or composed only by Clibanarius antillensis. Other species like Paguristes tortugae, Pagurus criniticornis, and Calcinus tibicen were also present in these clusters, but in small numbers. Only one monospecific aggregation composed by individuals of P. criniticornis was recorded in tide pools. Almost all crabs were inactive, despite some that were submerged in tide pools. Most of the individuals of C. antillensis were clustered (70.88%). Scattered individuals were larger than clustered ones and occupied mainly shells of Tegula viridula, which seemed to be the most adequate shell to the crabs. Clustered individuals used less incrusted shells than isolated ones. In general, clustering in Grande Beach presented the same patterns of size and sex distribution, and shell utilization than others already studied, with the exception of the smaller cluster size registered in this area.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"60 1","pages":"39-44"},"PeriodicalIF":0.0,"publicationDate":"2000-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s0034-71082000000100006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21683302","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: 25

Factors affecting biochemical composition of seston in an eutrophic reservoir (Pampulha Reservoir, Belo Horizonte, MG). 富营养化水库(Pampulha reservoir, Belo Horizonte, MG)中浮游生物生化组成的影响因素

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100009

I G Boëchat, A Giani

引用次数: 15