Results 91 to 100 of about 41,039 (215)

Late Quaternary vegetation dynamics from central parts of the Madeira River in Brazil

open access: yesActa Botânica Brasílica, 2015
The present study reconstructs the paleovegetation of a varzea (seasonally flooded) forest in the central parts of the Madeira River floodplain in Brazil using palynological data. Forty-nine cut-bank sediment samples from the Madeira River were processed
Yuri Oliveira Feitosa   +3 more
doaj   +1 more source

Relationships among catches, fishing effort and river morphology for eight rivers in Amazonas State (Brazil), during 1976-1978

open access: yes, 1983
For eight rivers in the Amazonas State (Brazil), it is shown that the annual number of fìshermen and dummy variables, which identify the rivers, explain 98.8 % of the landings at Manaus market.
Petrere, Jr., M.
core  

Comparative Response of Two Hydrilla Strains to Fluridone [PDF]

open access: yes, 2005
Experiments were conducted in a controlled-environmental growth chamber to evaluate the response of two strains of the invasive submersed plant Hydrilla verticillata (L.f.) Royle to fluridone (1-methyl-3-phenyl-5-[3-trifluoromethyl)phenyl]- 4(1H ...
Getsinger, K. D.   +2 more
core  

Morphological variation in populations of Tetragonopterus argenteus Cuvier, 1817 (Characiformes, Characidae) from Madeira and Paraguay river basins
Variação morfológica em populações de Tetragonopterus argenteus Cuvier, 1817 (Characiformes, Characidae) das bacias dos rios Madeira e Paraguai

open access: yesSemina: Ciências Biológicas e da Saúde, 2007
The saua Tetragonopterus argenteus is endemic to South America. It has a wide geographic distribution and occurs in different Brazilian basins, such as those of the Madeira and Paraguay rivers.
Willian Massaharu Ohara   +1 more
doaj  

Two new liverworts for Europe in Macaronesia : Odontoschisma prostratum (Sw.) Trevis. on the Azores and Jungermannia callithrix Lindenb. & Gottsche on the Azores and Madeira [PDF]

open access: yes, 1999
Odontoschisma prostratum (Sw.) Trevis. and Jungermannia callithrix Lindenb. et Gottsche, two liverworts mainly distributed in the Neotropics, are reported at hand of many collections from Macaronesia. O.
Schumacker, René, Váňa, Jiri
core  

An evaluation of Northern Florida Bay as a nursery area for red drum, Sciaenops ocellatus, and other juvenile and small resident fishes. [PDF]

open access: yes, 2002
Red drum is one ofthe most popular species sought by anglers in Florida Bay, yet juveniles are rarely encountered. We evaluated Florida Bay as a nursery area for red drum by sampling for recently-settled late larvae in basin areas within the bay with an ...
Cheshire, Robin T.   +2 more
core  

Two new Amazonian species of armored catfishes (Siluriformes: Loricariidae): Ancistrus verecundus and Ancistrus parecis

open access: yesNeotropical Ichthyology
Two new species Ancistrus are described: A. verecundus from the upper rio Madeira basin and A. parecis from the upper rio Juruena, rio Tapajós basin, Brazil. The two species differ from all congeners except A. jataiensis, A. reisi, and A. tombador in the
Sonia Fisch-Muller   +3 more
doaj   +1 more source

Informal gold mining and mercury pollution in Brazil [PDF]

open access: yes
The Amazon region has been responsible for a major share of Brazilian gold production in recent years. The region has witnessed a sizable gold rush comparable only to the California gold rush last century.
Biller, Dan, DEC
core  

Primeiro registro de madeira de annonaceae para o neógeno da América do Sul, Bacia do Amazonas, Brasil [PDF]

open access: yes, 2016
The relief of the regions of Manaus and Itacoatiara,Central Amazon, is supported by Neogene siliciclastic rocks, boundedat the base and top by lateritic paleosols and covered by quaternary sedimentarydeposits from the Solimões-Amazon river system.
Amaral Soares, Emilio Alberto   +5 more
core   +1 more source

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