Results 51 to 60 of about 1,294,150 (277)

Unravelling the skin of the nurse shark: A morphological description of the placoid scales of Ginglymostoma cirratum

open access: yesJournal of Fish Biology, EarlyView.
Abstract Ginglymostoma cirratum, commonly known as the nurse shark, is a nocturnally active benthic shark, often found in western and eastern Atlantic waters. Although this shark has been well explored in many biological aspects, few studies have thoroughly examined the morphology of its dermal denticles (or placoid scales).
Danilo P. Lima   +7 more
wiley   +1 more source

Entomofauna associada ao cultivo do cubiu (Solanum sessiliflorum Dunal) no município de Benjamin Constant, Amazonas, Brasil

open access: yesEntomoBrasilis, 2014
O cubiu (Solanum sessiliflorum Dunal) (Solanaceae) é originário da região Amazônica. Suas propriedades alimentares, medicinais e agronômicas têm despertado o interesse de pesquisadores desde 1970.
Agno Nonato Serrão Acioli   +5 more
doaj  

Ambiente, sustentabilidade e cidade [PDF]

open access: yes, 2009
Este capítulo equaciona criticamente as relações entre cidade e ambiente considerando para tal três dimensões principais: a sustentabilidade e o seu significado em contextos urbanos; a relação entre governação e participação pública; o contributo dos ...
Rodrigues, Maria Eugénia
core  

The Role of Gene Flow in the Diversification of the Monkey Treefrog Complex Across the South American Dry Diagonal

open access: yesZoologica Scripta, EarlyView.
ABSTRACT Understanding Neotropical megadiversity remains challenging due to fundamental taxonomic issues, including identifying and describing cryptic species and their distribution, and the limited knowledge of key factors driving biological diversification. Such challenges are especially prominent in diverse clades with high levels of cryptic species,
Felipe Camurugi   +10 more
wiley   +1 more source

Amazônia: desenvolvimento sustentável como segunda natureza? [PDF]

open access: yes, 2013
Made available in DSpace on 2013-05-22T23:31:51Z (GMT). No. of bitstreams: 1 RevistaPoliticaHomma.pdf: 70105 bytes, checksum: e207529659d384df2fc48fe3e448991b (MD5) Previous issue date: 2003-07 ...
HOMMA, A. K. O.
core  

Natureza e ciências sociais [PDF]

open access: yesSociedade e Estado, 2003
A construção do sentido do termo natureza abrange diferentes áreas do conhecimento e tem sido objeto de reflexão tanto das ciências naturais quanto sociais. Nos desdobramentos do conhecimento produzido sobre esta temática existem diversas abordagens que, da perspectiva das ciências sociais, podem ser identificadas. O propósito deste artigo é considerar
openaire   +5 more sources

Taxonomic Updates of Thismia pseudomelanomitra (Thismiaceae) Reveal an Old Acquaintance From the Ecuadorian Amazon

open access: yesFeddes Repertorium, Volume 137, Issue 2, June 2026.
ABSTRACT The Amazon Basin is home to the world's greatest terrestrial biodiversity, but many plant groups remain poorly studied. One example is the mycoheterotrophic genus Thismia (Thismiaceae), which is notable for its highly specialized floral morphology and ephemeral life cycles, making it difficult to detect in the field and limiting its ...
Diego Ferreira da Silva   +7 more
wiley   +1 more source

Biosolid as an alternative source of nutrients in chrysanthemum cultivation

open access: yesScientific Reports
The objective was to evaluate the biosolids as an alternative source of nutrients in the production of chrysanthemums by adding increasing doses to the cultivation substrate. The experimental design was in blocks with 6 treatments and 5 replications. The
Frederico Luiz Pereira   +6 more
doaj   +1 more source

Natureza e turismo : um equilíbrio possível? [PDF]

open access: yes, 2011
A secção Biologia é coordenada pelo Professor Universitário Armindo Rodrigues.Abril/2010: início do projecto de 3 anos MOST (Aplicação de um modelo de turismo sustentável a áreas da rede Natura 2000 nos Açores), financiado pela FCT e com o apoio do DB ...
Ventura, Maria A.
core  

Scheffrahnitermes ubuntu (Isoptera: Apicotermitinae), Description of a New Termite Using a Collaborative Approach to Address the Wallacean Shortfall

open access: yesNew Zealand Journal of Zoology, Volume 53, Issue 2, June 2026.
The study of Neotropical Apicotermitinae remains challenging due to the large number of undescribed taxa (Linnean shortfall) as well as the scarcity of distributional data (Wallacean shortfall). Despite recent efforts to reduce the first one, the second remains an even more significant challenge.
Camila C. Mellado   +10 more
wiley   +1 more source

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