Articles by Author: Hamilton Monteiro

Search results for Hamilton Monteiro

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  1. Status of birds of prey in Guinea-Bissau: first assessment based on road surveys<xref ref-type="fn" rid="F0000"/>

    Status of birds of prey in Guinea-Bissau: first assessment based on road surveys<xref ref-type="fn" rid="F0000"/>

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Several studies have reported marked declines in populations of birds of prey across the African continent, including West Africa. However, there are still regions of which virtually nothing is known, as is the case for Guinea-Bissau. Because birds of prey...
  2. 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...
  3. Physical processes contributing to harmful algal blooms in Saldanha Bay, South Africa

    Physical processes contributing to harmful algal blooms in Saldanha Bay, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The study synthesises current understanding of the predominant physical processes responsible for the seasonality of harmful algal blooms, notably Alexandrium catenella and Dinophysis spp., in the nearshore environment of Saldanha Bay on the west coast of South Africa. Saldanha Bay...
  4. A critical evaluation for the determination of amino acids in the marine environment by derivatization using 9-fluorenylmethyl chloroformate (FMOC-Cl) and reversed phase HPLC separation

    A critical evaluation for the determination of amino acids in the marine environment by derivatization using 9-fluorenylmethyl chloroformate (FMOC-Cl) and reversed phase HPLC separation

    Item type: Journal Article • Journal: South African Journal of Marine Science
    This article extends work on the FMOC-Cl method of amino-acid analysis to determine its feasibility and shortcomings for marine research. Precolumn derivatization and separation by high performance liquid chromatography does not require error-inducing desalting steps or other time-consuming clean-up normally...
  5. Interannual chlorophyll variability in South Africa's Saldanha Bay system, 1974–1979

    Interannual chlorophyll variability in South Africa's Saldanha Bay system, 1974–1979

    Item type: Journal Article • Journal: South African Journal of Marine Science
    With data obtained in the course of a pollution monitoring programme in Saldanha Bay between 1974 and 1979, it is shown how chlorophyll is affected by interannual variability in the characteristics of coastal water. Inflow of warm, oligotrophic oceanic water...
  6. The currents and circulation in Saldanha Bay after 1975 deduced from historical measurements of drogues

    The currents and circulation in Saldanha Bay after 1975 deduced from historical measurements of drogues

    Item type: Journal Article • Journal: South African Journal of Marine Science
    In 1975, major harbour works modified the physiography of Saldanha Bay, dividing it into two bodies of water, Big Bay and Small Bay. This study uses historical drogue data to investigate the relative importance of physical forcing mechanisms (wind and...
  7. A note on wind-driven replacement flow of the bottom layer in Saldanha Bay, South Africa: implications for pollution

    A note on wind-driven replacement flow of the bottom layer in Saldanha Bay, South Africa: implications for pollution

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The unexpected effect of a synoptic-scale event (passage of a cold front) on the advection of water across the mouth of Small Bay, Saldanha Bay, is recorded. From a current-meter record, it is shown how the strength (> 15m·s−1) and...
  8. δ<sup>15</sup>N as a tool to demonstrate the contribution of fish-waste-derived nitrogen to an <em>Ulva</em> bloom in Saldanha Bay, South Africa

    δ<sup>15</sup>N as a tool to demonstrate the contribution of fish-waste-derived nitrogen to an <em>Ulva</em> bloom in Saldanha Bay, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    This study uses stable isotope ratios of nitrogen (δ15N) to test the hypothesis that a bloom of the green seaweed Ulva lactuca, which occurred in Saldanha Bay, South Africa, in summer 1993/94 was linked to an adjacent discharge of nitrogen...
  9. Minimal generating sets of groups, rings, and fields

    Minimal generating sets of groups, rings, and fields

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    A subset X of a group (or a ring, or a field) is called generating, if the smallest subgroup (or subring, or subfield) containing X is the group (ring, field) itself. A generating set X is called minimal generating, if...