Articles by Author: Celestino Manuel

Search results for Celestino Manuel

We found 11 results for you
  1. Nest-site characteristics and aspects of the breeding biology of the endangered Timneh Parrot <em>Psittacus timneh</em> in Guinea-Bissau

    Nest-site characteristics and aspects of the breeding biology of the endangered Timneh Parrot <em>Psittacus timneh</em> in Guinea-Bissau

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Timneh Parrots Psittacus timneh are endemic to the moist forests of West Africa. Concerns over rapid declines in populations due to overharvesting for the pet trade and forest loss prompted the species’ categorisation as Endangered on the IUCN Red List...
  2. On the duality problem for weakly compact, strictly singular operators

    On the duality problem for weakly compact, strictly singular operators

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    We show that there exists a weakly compact, strictly singular operator T such that the conjugate operator T * is not strictly cosingular. This example gives a negative answer to an old question of Pełczyński.
  3. Connectivity between the Algerian population of Greater Flamingo <em>Phoenicopterus roseus</em> and those of the Mediterranean basin

    Connectivity between the Algerian population of Greater Flamingo <em>Phoenicopterus roseus</em> and those of the Mediterranean basin

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    In the Mediterranean basin, Greater Flamingos Phoenicopterus roseus constitute a metapopulation with natal and breeding dispersal among colonies. However, the rate of exchange between European and North African colonies remains poorly known. In this paper, we document the wintering and...
  4. Long-term monitoring of an insular population of Barbary Falcon <em>Falco peregrinus pelegrinoides</em>

    Long-term monitoring of an insular population of Barbary Falcon <em>Falco peregrinus pelegrinoides</em>

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Territory spacing and breeding rates of an insular population (north-western Tenerife, Canary Islands) of Barbary Falcon Falco peregrinus pelegrinoides was studied from 1993 to 2008. The population increased constantly since the outset, from two pairs in 1993 to 12 in...
  5. The phylogenetic affinities of the Socotra Bunting <em>Emberiza socotrana</em>

    The phylogenetic affinities of the Socotra Bunting <em>Emberiza socotrana</em>

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    The monophyly of the African ‘brown bunting’ complex was corroborated by a recent molecular study. However, the little-known Socotran endemic Emberiza socotrana, which is morphologically similar to the other taxa in this complex, was not included. Here we present a...
  6. Editorial

    Editorial

    Item type: Journal Article • Journal: Anthropology Southern Africa
  7. Editorial

    Editorial

    Item type: Journal Article • Journal: Anthropology Southern Africa
  8. Editorial

    Editorial

    Item type: Journal Article • Journal: Anthropology Southern Africa
  9. The impact of the Eurozone sovereign debt crisis on bond fund performance persistence: Evidence from a small market

    The impact of the Eurozone sovereign debt crisis on bond fund performance persistence: Evidence from a small market

    Item type: Journal Article • Journal: Investment Analysts Journal
    We evaluate the impact of the Eurozone sovereign debt crisis on the performance and performance persistence of a survivorship bias-free sample of bond funds from a small market, identified as one of the most affected by this event, during the...
  10. Naturalism, non-factualism, and normative situated behaviour

    Naturalism, non-factualism, and normative situated behaviour

    Item type: Journal Article • Journal: South African Journal of Philosophy
    This paper argues that the normative character of our unreflective situated behaviour is not factual. We highlight a problematic assumption shared by the two most influential trends in contemporary philosophy of cognitive science, reductionism and enactivism. Our intentional, normative explanations...