Articles by Keyword: Generalised Linear Model

Search results for Generalised Linear Model

We found 286 results for you
  1. 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...
  2. 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...
  3. Quantifying commercial catch and effort of monkfish <em>Lophius vomerinus</em> and <em>L. vaillanti</em> off Namibia

    Quantifying commercial catch and effort of monkfish <em>Lophius vomerinus</em> and <em>L. vaillanti</em> off Namibia

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Abundance and exploitation patterns of monkfish Lophius vomerinus and L. vaillanti were investigated for use as inputs into a stock assessment framework to be used for management of the Namibian monkfish resource. Total numbers of monkfish caught per size-class were...
  4. Acoustic behaviour of southern right whales in relation to numbers of whales present in Walker Bay, South Africa

    Acoustic behaviour of southern right whales in relation to numbers of whales present in Walker Bay, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Estimating numbers of whales present in an area from recorded call rates could be a useful conservation tool. We recorded southern right whale Eubalaena australis vocalisations and presence in Walker Bay on the south coast of South Africa. In all,...
  5. Seasonal fluctuations in occurrence of inshore Bryde's whales in Plettenberg Bay, South Africa, with notes on feeding and multispecies associations

    Seasonal fluctuations in occurrence of inshore Bryde's whales in Plettenberg Bay, South Africa, with notes on feeding and multispecies associations

    Item type: Journal Article • Journal: African Journal of Marine Science
    Seasonal fluctuations in the occurrence of inshore South African Bryde's whales Balaenoptera edeni were investigated between November 2005 and June 2008. Sighting data were collected in Plettenberg Bay on the south-east coast of South Africa. Bryde's whale occurrence was modelled...
  6. Patterns in abundance, population structure and biology of knife prawn <em>Haliporoides triarthrus</em> on deep-water trawl grounds off eastern South Africa

    Patterns in abundance, population structure and biology of knife prawn <em>Haliporoides triarthrus</em> on deep-water trawl grounds off eastern South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    The deep-water trawl fishery along the KwaZulu-Natal coast of South Africa targets several crustacean species, with the knife (or pink) prawn Haliporoides triarthrus contributing most of the catch. Logbook data of fishing effort and catch between 1988 and 2010 were...
  7. Factors affecting recapture rates of raggedtooth sharks <em>Carcharias taurus</em> tagged off the east coast of South Africa

    Factors affecting recapture rates of raggedtooth sharks <em>Carcharias taurus</em> tagged off the east coast of South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Understanding differences in the recapture rate between different tags (A-, B- and C-types), capture methods (rock-and-surf anglers, scientific divers and Natal Sharks Board protection nets) and life-history stages (juvenile and adult) is critical in evaluating the results obtained from cooperative...
  8. Growth models for six <em>Eucalyptus</em> species in Angola

    Growth models for six <em>Eucalyptus</em> species in Angola

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    This study developed growth models for Eucalyptus saligna Sm., E. camaldulensis Dehnh., E. macarthurii H.Deane & Maiden, E. resinifera Sm., E. siderophloia Benth. and E. grandis Hill ex. Maiden, for the central highlands of Angola, and used these models to...
  9. Macroeconomic variables and the Johannesburg Stock Exchange: A multifactor approach

    Macroeconomic variables and the Johannesburg Stock Exchange: A multifactor approach

    Item type: Journal Article • Journal: De Ratione
    This study estimates the simultaneous relationship between a number of selected macroeconomic variables and share prices on the Johannesburg Stock Exchange (JSE). A linear factor model identical in form to that assumed by the arbitrage pricing theory (APT) is estimated...
  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...