Articles by Keyword: Generalised Additive Model

Search results for Generalised Additive Model

We found 248 results for you
  1. Sorghum production systems and constraints, and coping strategies under drought-prone agro-ecologies of Ethiopia

    Sorghum production systems and constraints, and coping strategies under drought-prone agro-ecologies of Ethiopia

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Sorghum is one of the most important cereal crops worldwide after wheat, rice, maize and barley. Examining the present socio-economic conditions of sorghum-producing farmers in different agro-ecologies in Ethiopia is of importance for the design of improvement strategies. The objectives...
  2. Sharks caught in the KwaZulu-Natal bather protection programme, South Africa. 13. The tiger shark <em>Galeocerdo cuvier</em>

    Sharks caught in the KwaZulu-Natal bather protection programme, South Africa. 13. The tiger shark <em>Galeocerdo cuvier</em>

    Item type: Journal Article • Journal: African Journal of Marine Science
    The current study provides long-term catch rate and biological data for tiger sharks Galeocerdo cuvier caught in the KwaZulu-Natal bather protection programme. Between 1978 and 2014, 1 760 G. cuvier were caught in nets and between 2007 and 2014, 108...
  3. Sharks caught in the KwaZulu-Natal bather protection programme, South Africa. 14. The smooth hammerhead shark <em>Sphyrna zygaena</em> (Linnaeus)

    Sharks caught in the KwaZulu-Natal bather protection programme, South Africa. 14. The smooth hammerhead shark <em>Sphyrna zygaena</em> (Linnaeus)

    Item type: Journal Article • Journal: African Journal of Marine Science
    The current study provides long-term catch-rate, biological and feeding data for smooth hammerhead sharks, Sphyrna zygaena, caught in South Africa’s KwaZulu-Natal bather protection programme. In total, 2 512 S. zygaena were caught in net installations between 1978 and 2014, and...
  4. The autumn occurrence and spatial distribution of cetaceans in the waters of Mauritania during a geophysical survey in 2012

    The autumn occurrence and spatial distribution of cetaceans in the waters of Mauritania during a geophysical survey in 2012

    Item type: Journal Article • Journal: African Journal of Marine Science
    This study aimed to identify the occurrence and spatial distribution of cetaceans in Mauritanian waters (eastern Atlantic). A geophysical survey was conducted over 92 days between September and December 2012. Over 967 km was surveyed, with 1 017 h of...
  5. Spatial considerations when monitoring reef fishes

    Spatial considerations when monitoring reef fishes

    Item type: Journal Article • Journal: African Journal of Marine Science
    Spatial dependence can obscure relationships between response and explanatory variables because of structuring within the residuals reducing variance and biasing coefficient estimates. Here, we highlight the influence of the spatial component, in the presence of spatial dependence, on abundance trends...
  6. Youth's perceptions of HIV infection risk: a sex-specific test of two risk models

    Youth's perceptions of HIV infection risk: a sex-specific test of two risk models

    Item type: Journal Article • Journal: African Journal of AIDS Research
    The study examines the associations between the cumulative and additive risk models and Nigerian youth's likelihood of perceiving vulnerability to HIV infection. Both models of risk seem to provide unique contributions to such understanding. The analysis is based on data...
  7. Movement patterns of coastal bottlenose dolphins in the presence of a fast-flowing, prevailing current: shore-based observations at Cape Vidal, South Africa

    Movement patterns of coastal bottlenose dolphins in the presence of a fast-flowing, prevailing current: shore-based observations at Cape Vidal, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    The presence and movement of Indo-Pacific bottlenose dolphins Tursiops aduncus were investigated using shore-based observations made during a humpback whale Megaptera novaeangliae migration survey at Cape Vidal, South Africa, undertaken between June and October 1988–1991. Occurrence was analysed as counts...
  8. Stock-environment recruitment analysis for Namibian Cape hake <em>Merluccius capensis</em>

    Stock-environment recruitment analysis for Namibian Cape hake <em>Merluccius capensis</em>

    Item type: Journal Article • Journal: African Journal of Marine Science
    The factors modulating recruitment success of Cape hake Merluccius capensis in Namibian waters are still unresolved. In this study, we used generalised additive models, regression tree analysis and the conventional Ricker model to examine the effect of environmental indices and...
  9. Spatial pattern and determinants of unmet need of family planning in Nigeria

    Spatial pattern and determinants of unmet need of family planning in Nigeria

    Item type: Journal Article • Journal: South African Family Practice
    Background: Nigeria still grapples with low family planning (FP) use and a high fertility rate. This study explores the factors associated with the unmet need for FP and the coldspots of unmet need for FP in Nigeria.
  10. Modelling dominant height growth in plantations of <em>Pseudotsuga menziesii</em> (Mirb.) Franco in Spain

    Modelling dominant height growth in plantations of <em>Pseudotsuga menziesii</em> (Mirb.) Franco in Spain

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    A model for predicting dominant height growth and site index of Pseudotsuga menziesii (Mirb.) Franco in Spain was constructed. Data from stem analysis of 117 site trees were used. Four dynamic equations using the algebraic difference approach (ADA) and its...