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A moratória da piracatinga (Calophysus macropterus, Siluriformes: Pimelodidae) está sendo cumprida?
No full textComparação da presença de metabólitos secundários no cultivo in vitro de Vismia japurensis sob dois meios de cultura distintos
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Análise da influência da temperatura e CO2 sobre o gene KDR em populações de Aedes aegypti na cidade de Manaus
No full textRelação Peso Comprimento De Espécies De Peixes Comerciais De Um Lago De Várzea Amazônico
No full textComparação anatômica e histoquímica entre raízes primária e adventícia de Attalea microcarpa (Arecaceae) em estádio inicial de crescimento
Get PDFWe describe the anatomical structure of roots originating from the apocole of Attalea microcarpa compared to the primary root, by means of usual methods for optical microscopy. The adventitious roots are differentiated in the apocole associated to vascular bundles, and can remain as a single structure or branch. They have the basic root structure characteristic of Arecoideae palms, without schizogenous spaces, which are observed in the primary root, in addition to few air spaces. Mucilages, starch and proteins were present in both types of roots. Adventitious roots of the apocole are described for the first time in Arecaceae. © 2019, (publisher Name). All right reserved
Antimicrobial and Larvicidal Activities of Stingless Bee Pollen from Maues, Amazonas, Brazil
No full textA new nurse frog of Allobates masniger-nidicola complex (Anura, Aromobatidae) from the east bank of Tapajós River, eastern Amazonia
No full textThe small nurse frogs of the genus Allobates (Anura, Aromobatidae) represent one of the most challenging taxonomic issues of the Neotropics. During several amphibian surveys in the Middle Tapajós River region, state of Pará, Brazil, we collected phenotypic, ecological, and molecular data on species of this genus, leading to the identification of a new species included in the Allobates masniger-nidicola complex. The new species is characterized by a large body size (snout-vent length 19.2–21.7 mm in males and 19.3–22.0 mm in females), finger III not swollen in adult males; cryptic external coloration, with dorsum uniformly ochre; a dark brown lateral stripe and a pale cream ventrolateral stripe; limbs ranging from ochre to orange; throat and chest violaceous in males and yellowish in females. The advertisement call is usually arranged in bouts of four closely spaced notes, which we term 4-pulsed units of repetition (UR), 0.317 s long on average, followed by silent intervals, and an average dominant frequency of 4.163 kHz. The new species also has exotrophic tadpoles with a unique fin morphology, which begins after the body-tail insertion and is deeper posteriorly to half of the caudal length. Sequencing of the 16S and COI regions of the mitochondrial DNA show a genetic p-distance of approximately 6–10% compared to closely related congeners. We discuss the biogeography of the new species based on phylogenetic relationships of the species within the Allobates masniger-nidicola complex and the allopatric geographic distribution in relation to sister taxa. Functional characteristics and geographic restrictions make this species particularly sensitive to the increasing human impact in eastern Amazonia. Copyright © 2019 Magnolia Pres
Larva de mosca soldado negra podem substituir metade da ração na criação do tambaqui sem prejuízo no desempenho zootécnico
No full textA new species of Colacus Ohaus, 1910 (Coleoptera: Scarabaeidae: Dynastinae) from the Mata Seca biotope of Brazil, and notes on Colacus morio Ohaus, 1910
No full textIn this contribution, Colacus rubrofemoratus Sobral, Morais, & Grossi new species (Coleoptera: Scarabaeidae: Dynastinae: Agaocephalini) is described and illustrated based on male specimens found in a transitional area of Caatinga, Atlantic Forest, and Cerrado in Brazil. In addition, the female of Colacus morio Ohaus, 1910 is redescribed, a distribution map for the genus is provided, and a new key to the species of Colacus is presented. Copyright © 2019 Magnolia Press