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  • Category: Audio
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  • Downloads: 353
  • Visits: 238

O Mundo Subterrâneo das Formigas Saúvas

Trata-se de um podcast que dispõe informações sobre formigueiros de saúvas, seguindo uma linha de raciocínio lógica para facilitar a compreensão, primeiramente contextualizando sobre os formigueiros e sobre os fungos, e suas estruturas básicas (morfologia das formigas e principais estruturas do formigueiro). Em seguida, o podcast aborda como se dá a vida dessas formigas saúvas em comunidade, organização social e ciclo de vida, bem como a fundação de um novo formigueiro pelas rainhas. Ao explicar este último tópico, é feita uma conexão para iniciar a discussão acerca da importância do fungo para as formigas saúvas e sobre a interação simbiótica entre eles, uma vez que ao fundar um novo formi...

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  • Category: Video or Animation
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  • Downloads: 4
  • Visits: 193

Edição de genes por CRISPR-Cas9: aplicação contra a anemia falciforme

O Crispr (repetições palindrômicas curtas agrupadas e regularmente espaçadas) é uma tecnologia recente e alvo de publicação de muitos artigos ao redor do mundo. Neste sentido, o vídeo a seguir explica de maneira rápida e objetiva um método para tratamento da Anemia Falciforme utilizando a edição genética com CRISPR-Cas9.

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  • Category: Image
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  • Downloads: 495
  • Visits: 18.394

Green-backed, Striated or Little Heron ( Butorides striata (triatus) )

Physical appearance: 36 cm. The legs are short and yellow. The body is predominantly grey, darker in the back. The top of the head is black. The immature is striated and brownish. Distribution: American Continent, Africa, Asia, Australia and islands in the Pacific. Habitat: Rivers, lakes and mangroves of different sizes. Diet: Aquatic insects, mollusks, amphibians, reptiles and fish. Reproduction: The nest is a platform on the top of tall trees. Lays three eggs. Natural history: Solitary and migratory. There are saw-like structures inside the beak to help holding slippery food. May be eaten by carnivorous fish such as the trahiras (Hoplias sp.) when walking on flooded land....

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  • Category: Image
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  • Downloads: 586
  • Visits: 28.457

Black Vulture ( Coragyps atratus )

62 cm in length, 143 cm of wingspan. The feathers are absent in the head and neck. The body is black, with white spots near the tip of the wings (seen only when flying). Distribution: From central U.S.A to central Argentina. Habitat: Virtually in any kind of landscape, preferably in open areas. Absent in large areas of dense vegetation. Diet: Mainly carrion. Does not hunt, but kills injured or young animals, such as turtle eggs and hatchlings, even newly born big mammals like calves. May eat fruits. The excellent eyesight helps finding carrion at long distances. Reproduction: The courtship consists of movements of the male jumping on the ground with the wings opened and then...

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  • Category: Image
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  • Downloads: 591
  • Visits: 21.062

Curl-crested Jay ( Cyanocorax cristatellus )

35cm Similarly to other Brazilian jays, the Curl-crested jay has white lower parts and blue and black upper parts. It may be confused with the Plush-crested jay (Cyanocorax chrysops), but while the last presents the crest in the back of the head, the yellow iris and a blue patch around the eyes, the Curl-crested jay presents the crest on the forehead, the red iris and the head is entirely black. Whereas the Old World ravens are mostly black, as well as the crows, the Brazilan corvids are colorful and most of them have white lower parts. There are 6 species of jays in Brazil, all of them extremely beautiful. The Curl-crested jay is one of Brazilian’s noisiest jays. To make the noise ...

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  • Category: Image
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  • Downloads: 487
  • Visits: 18.512

Blue-winged Parrotlet ( Forpus xanthopterygius )

12,5 cm. The general color is green, but the male has a bright blue area in the wings and lower back. The female does not have this blue area and the belly is somewhat yellow. There may be mutations producing all yellow or blue individuals. The plumage of the immature individuals is not as bright as the adult’s. Distribution: Tropical South America. Habitat: Forest borders, gallery forests, parks, gardens and open areas. Diet: Feeds on fruits, seeds, buds and flowers. Reproduction: It is monogamous. The couple stays together for the rest of their lives. The nest is built inside a hole in a tree that may be an abandoned nest of hornero (Furnarius rufus) or an artificial nest box. ...

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  • Category: Image
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  • Downloads: 530
  • Visits: 17.281

Common Moorhen ( Gallinula chloropus )

35 cm. The legs and the toes are long and green. Has a red shield-like structure in the forehead that is larger in the male. The neck and inferior parts are blue. The back is brown and there is a white band in the wing. The immature individuals are brown. Distribution: All over the world, except from Australia and New Zealand. Habitat: Lives in lakes, ponds and swamps, provided there is plenty of aquatic vegetation. May be found even in very polluted places and brackish water. Diet: Feeds on vegetables and aquatic insects. Usually dives to catch the food. When it does not dive it waters the food before swallowing. Reproduction: The nest is built among the aquatic vegetation. Th...

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  • Category: Image
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  • Downloads: 816
  • Visits: 27.573

Common Potoo ( Nyctibius griseus )

37cm It is a unique bird that can only be confused with other Potoos, from which it differs by being mostly gray. Not like any other bird, the Potoo is one of the best camouflaged birds on earth. It spends the whole day quietly perched on a carefully chosen branch in a way it blends with the substrate as the bird seems to be part of the tree. The large orange eyes, which could be a flaw for the camouflage are wisely covered by eyelids with a tiny fold in the middle, from which the bird can see the surroundings as the pupil is exposed while the orange iris is hidden. In the night the bird leaves its perch flying as a falcon in hunt for flying insects that it catches with its huge mouth...

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  • Category: Image
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  • Downloads: 628
  • Visits: 24.532

Double-collared Seedeater ( Sporophila caerulescens )

12,5 cm. The male’s upper parts are dark gray. The face and a ribbon around the neck (the collar) are black. The posterior part of the throat, the belly and a narrow band around the eye are white, sometimes buffy. The color of the beak varies individually. The female and the Young males are brown with the inferior parts lighter. Distribution: From Bahia to Rio Grande do Sul, Uruguay, Argentina to Peru. Habitat: Grasslands, crops. They sleep in tall grass and sugar cane crops were they may bend the stems with their weight. Diet: Feeds on grains. Follows the expansion of seed producing grasses, thus invading new areas as the Distrito Federal. Frequently eats arthropods such as insect...

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  • Category: Image
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  • Downloads: 837
  • Visits: 5.414

Cordia cf. superba Cham.

Nome popular: louro-branco. Árvore até 15m; extremidade dos ramos levemente estriada, glabra ou setulosa; folha simples, alterna, espiralada ou suboposta no ápice dos ramos, sem estípula, pecíolo canaliculadlo, 2-4 X 0,1cm, glabro ou setoso, lâmina elíptica a elíptico-oboval, ápice acuminado, base atenuada, 16,5-19,5 X 6-7cm, margem inteira, ondulada, membranácea a subcoriácea, venação camptódroma, 4-6 pares de nervuras secundárias, conspícuas na face abaxial, venação terciária paralela, perpendicular à nervura central e secundária, conspícua, face adaxial glabra, abaxial esparso-setulosa, nervura central esparso-setosa, pontuações amarronzadas, esparsas, na fa...

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  • Category: Image
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  • Downloads: 1.542
  • Visits: 5.873

Cordia taguahyensis Vell.

Nome popular: louro-branco.

Árvore até 16m; extremidade dos ramos rugosa, estriada, esparso-setuloso-adpressa a glabrescente, acizentada; folha simples, alterna, espiralada, oposta ou sub-oposta no ápice dos ramos, sem estípula, pecíolo canaliculado, 2,5 X 0,1cm, setoso-adpresso a glabrescente, lâmina elíptica ou elíptico-oboval, ápice acuminado, base atenuada, 17-20,5 X 4-6,5cm, margem inteira, membranácea a sub-cartácea, venação camptódroma, 8 pares de nervuras secundárias, às vezes opostas na base, conspícuas na face abaxial, venação terciária paralela, perpendicular à secundária, mais conspícua na abaxial, face adaxial glabra, abaxial setos...

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Results 1 - 20 from 34 Found materials (New search)