Articles by Author: Miguel Po Ccedil As

Search results for Miguel Po Ccedil As

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  1. Are mist-nets suitable for rapid habitat evaluations in the tropics? Results from a study in Guinea-Bissau

    Are mist-nets suitable for rapid habitat evaluations in the tropics? Results from a study in Guinea-Bissau

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Catry, P., Araújo, A., Cruz, C., Pinheiro, A., Poças, M., Nadum, J., Armelin, M.& Pereira, J.R. 1999. Are mist-nets suitable for rapid habitat evaluations in the tropics? Results from a study in Guyinea-Bissau. Ostrich 70(2) 134–137
  2. Spring diet and trophic partitioning in an alpine lizard community from Morocco

    Spring diet and trophic partitioning in an alpine lizard community from Morocco

    Item type: Journal Article • Journal: African Zoology
    Oukaïmeden Plateau is a herpetologically rich locality in the High Atlas (Morocco) where four lizard species coexist in strict sympatry: three lacertids (Lacerta perspicillata chabanaudi, L. andreanszkyi and Podarcis vaucheri – formerly P. hispanica vaucheri) and one gekkonid (Quedenfeldtia trachyblepharus)...
  3. Genetic variation among spiny-footed lizards in the <em>Acanthodactylus pardalis</em> group from North Africa

    Genetic variation among spiny-footed lizards in the <em>Acanthodactylus pardalis</em> group from North Africa

    Item type: Journal Article • Journal: African Zoology
    The systematics of the genus Acanthodactylus was classically based on external morphological traits, osteological characters and morphology of the hemipenes. Although the identification of species complexes is relatively easy, the distinction within some groups is difficult due to a high...
  4. What do myrmecophagous geckos eat when ants are not available?: comparative diets of three Socotran species

    What do myrmecophagous geckos eat when ants are not available?: comparative diets of three Socotran species

    Item type: Journal Article • Journal: African Zoology
    The diet of three populations of semaphore geckos (Pristurus) from Socotra archipelago is analysed based on 82 faecal pellets. Pristurus samhaensis from the small islands of Samha (n = 18) and Darsa (n = 24) and P. sokotranus from the...
  5. Inferring population trends of <em>Araucaria angustifolia</em> (Araucariaceae) using a transition matrix model in an old-growth forest

    Inferring population trends of <em>Araucaria angustifolia</em> (Araucariaceae) using a transition matrix model in an old-growth forest

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Matrix population models may generate important information to prevent undesirable outcomes for endangered species. This is the case for Araucaria angustifolia, a Critically Endangered conifer, with little knowledge regarding its life history and trends in development over time. This study...
  6. Differential susceptibility of commercial zucchini cultivars to viruses of cucurbits

    Differential susceptibility of commercial zucchini cultivars to viruses of cucurbits

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A study to assess the effectiveness of some zucchini [Cucurbita pepo (L.)] cultivars in limiting the effects of virus disease in zucchini crops was conducted at Bayne's Drift, KwaZulu-Natal. The severity of disease was assessed using a visual rating scale...
  7. Higher Derivations and a Theorem By Herstein

    Higher Derivations and a Theorem By Herstein

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    In this paper we extend to the higher derivations a well-known result proved by Herstein concerning derivations in prime rings. We prove results which imply that every Jordan higher derivation of a 2-torsion-free semiprime ring is a higher derivation.
  8. Spectral Properties, Including Spectral Singularities, of a Quadratic Pencil of Schrödinger Operators on the Whole Real Axis

    Spectral Properties, Including Spectral Singularities, of a Quadratic Pencil of Schrödinger Operators on the Whole Real Axis

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    We consider the Quadratic Pencil of Schr¨ odinger Operator L generated in L 2 (R) by the differential expression
  9. On the matrix versions of Appell hypergeometric functions

    On the matrix versions of Appell hypergeometric functions

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    The main aim of this paper is on Appell hypergeometric matrix functions. Also, matrix differential equations and integral representation satisfied F1 matrix function is derived.
  10. Short Notes

    Short Notes

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology