Revista brasileira de biologia最新文献_第6页

Population dynamics and net primary production of the aquatic macrophyte Nymphaea rudgeana C. F. Mey in a lotic environment of the Itanhaém River basin (SP, Brazil). itanhasamim河流域生态环境中水生植物绿绒睡莲的种群动态和净初级产量(SP，巴西)

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100011

A F Camargo, E R Florentino

引用次数: 27

Comparative study of the zooplankton composition of six lacustrine ecosystems in central Brazil during the dry season. 巴西中部六个湖泊生态系统在旱季浮游动物组成的比较研究。

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100013

F L Starling

引用次数: 24

Low courtship song variation in south and southeastern Brazilian populations of Drosophila meridionalis (Diptera, Drosophilidae). 巴西南部和东南部子午果蝇种群的低求偶鸣声变异(双翅目，果蝇科)。

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100008

C T Costa, G C Kuhn, F M Sene

引用次数: 3

Biology of Corecoris dentiventris Berg, 1884 (Hemiptera, Coreidae) in tobacco culture (Nicotiana tabacum). Corecoris dentiventris Berg，1884（半翅目，Coreidae）在烟草栽培（Nicotiana tabacum）中的生物学特性。

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100020

B H Caldas, L R Redaelli, L M Diefenbach

{"title":"Biology of Corecoris dentiventris Berg, 1884 (Hemiptera, Coreidae) in tobacco culture (Nicotiana tabacum).","authors":"B H Caldas, L R Redaelli, L M Diefenbach","doi":"10.1590/s0034-71082000000100020","DOIUrl":"10.1590/s0034-71082000000100020","url":null,"abstract":"Corecoris dentiventris Berg, 1884 (HEM., Coreidae) represents a pest in the tobacco culture in Southern Brazil. Nymphs and adults cause the wilting and twisting of the tobacco leaves due to their sucking habit. There are very few works about this species and these are restricted to concise description of the adult morphology, records of host plants and enumeration of injuries. The present investigation aims to study the life cycle of this bug. The experiment was carried out in a tobacco culture (Virginia type, var. K 326) implanted in the experimental area of the Departamento de Fitossanidade of the Universidade Federal do Rio Grande do Sul, in Porto Alegre, RS. The life cycle was studied in field conditions, in nylon cages, from egg clusters oviposited by females of the colonizing generation. The preferred oviposition site was the main vein in the abaxial side of the leaf. The average incubation period was 13.7 +/- 0.04 days and the egg viability, 99.63%. The average periods of the different instars of the bug, in days, were: 5.4 +/- 0.08, 9.7 +/- 0.19, 4.5 +/- 0.08, 5.3 +/- 0.08, 9.0 +/- 0.13 respectively for the first, second, third, fourth and fifth instars. The first instar presented the highest mortality (13.86%). The accumulated mortality of the nymphal phase was 35.29%. The sex ratio was 0.97 males: 1 female.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"60 1","pages":"173-8"},"PeriodicalIF":0.0,"publicationDate":"2000-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s0034-71082000000100020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21683779","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: 15

Variation of density, species composition and dominance of rotifers at a shallow tropical reservoir (Broa reservoir, SP, Brazil) in a short scale time. 热带浅层水库(巴西SP . Broa水库)轮虫密度、种类组成及优势度短尺度时间变化

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100002

M P Rodríguez, T Matsumura-Tundisi

{"title":"Variation of density, species composition and dominance of rotifers at a shallow tropical reservoir (Broa reservoir, SP, Brazil) in a short scale time.","authors":"M P Rodríguez, T Matsumura-Tundisi","doi":"10.1590/s0034-71082000000100002","DOIUrl":"https://doi.org/10.1590/s0034-71082000000100002","url":null,"abstract":"Rotifers are the predominant group of zooplankton found in the majority of reservoirs, constituting more than 60% of the total zooplankton present. Being opportunistic organisms, they easily adapt to changes in environmental conditions, and it is therefore difficult to establish a constant level of composition and occurrence of a species in specific areas at specific times. In order to establish how changes in composition and predominance of a species occurs within a dynamic system, the daily variation in the total density of rotifers and that of the dominant species were studied at short intervals during a period of 20 days at Lobo (Broa) reservoir. Filinia pejleri and Keratella americana were the predominant species, making up 64.3% of the total rotifers. However, during the first five days of the study, there was a predominance of two genera, Conochilus (C. coenobasis and C. unicornis) and Keratella (K. americana and K. cochlearis), with the genus Conochilus being substituted by the genus Filinia from the seventh day onwards, which, together with the genus Keratella, was predominant until the end of the study period. The increase in density of Filinia pejleri and Keratella americana was found to be associated with increased wind speed. The resulting turbulence could cause changes in the behavior and metabolism of the organisms, increasing the rate of reproduction, which in turn could be attributed to the greater availability of food through the suspension of material from the lake bed.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"60 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2000-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s0034-71082000000100002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21683298","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: 30

Variation in aboveground biomass of Allagoptera arenaria (Gomes) O. Kuntze (Arecaceae) on the Marambaia beach ridge, Rio de Janeiro, Brazil 巴西Marambaia海滩山脊上沙鳞Allagoptera arenaria (Gomes) O. Kuntze(槟榔科)地上生物量的变化

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/S0034-71082000000100017

L. F. Menezes, D. Araujo

引用次数: 16

Histology of the trachea and lung of Siphonops annulatus (Amphibia, Gymnophiona). 环状虹吸管(两栖纲，裸鱼纲)气管和肺的组织学研究。

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100019

B Kuehne, L C Junqueira

引用次数: 18

Dental development and ontogenetic diet shifts of Roeboides paranensis pignalberi (osteichthyes, Characinae) in pools of the upper Rio Paraná floodplain (state of Paraná, Brazil). 巴西帕拉那河上游河漫滩(帕拉那河州<e:1>)池中帕拉那河鱼(骨鱼科)的牙齿发育和个体饮食变化。

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100012

N S Hahn, C S Pavanelli, E K Okada

引用次数: 31

Foraging behavior of bee pollinators on the tropical weed Triumfetta semitriloba: flight distance and directionality. 蜜蜂传粉媒介在热带杂草上的觅食行为:飞行距离和方向性。

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100005

R G Collevatti, J H Schoereder, L A Campos

{"title":"Foraging behavior of bee pollinators on the tropical weed Triumfetta semitriloba: flight distance and directionality.","authors":"R G Collevatti, J H Schoereder, L A Campos","doi":"10.1590/s0034-71082000000100005","DOIUrl":"https://doi.org/10.1590/s0034-71082000000100005","url":null,"abstract":"We studied flight distance and directionality of bee pollinators on the tropical shrub weed Triumfetta semitriloba Jacq. (Tiliaceae), addressing (1) within- and between-plant movement pattern; (2) distances flown between plants; (3) flight directionality. Flowering plants were distributed in well-delimited clumps, in each of two pasture areas (A1 and A2) and one area of forest gap (A3), in Viçosa, southeastern Brazil. Five solitary bee species, Augochlorella michaelis, Augochloropsis cupreola, Pseudocentron paulistana, Ceratinula sp., Melissodes sexcincta, and two social bee, Plebeia droryana, P. cf. nigriceps were observed. All species moved mainly to the nearest flower on the same individual plant and, in between-plant movements, to the first or second nearest neighbor. All species moved non-randomly, presenting a flight directionality in departures (maintenance of flight direction), but with a high frequency of turn angles. It is suggested that this foraging behavior pattern occurred because of the resource quantity and quality (pollen or nectar), and environmental characteristics such as flower density and resource distribution.","PeriodicalId":76429,"journal":{"name":"Revista brasileira de biologia","volume":"60 1","pages":"29-37"},"PeriodicalIF":0.0,"publicationDate":"2000-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s0034-71082000000100005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21683301","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: 30

Antennal malformations in light ocelli drones of Apis mellifera (Hymenoptera, Apidae). 蜜蜂轻雄蜂的触角畸形(膜翅目，蜜蜂科)。

Revista brasileira de biologia Pub Date : 2000-02-01 DOI: 10.1590/s0034-71082000000100015

J Chaud-Netto

引用次数: 0