Articles by Keyword: Proportion At Age

Search results for Proportion At Age

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  1. Can anchovy age structure be estimated from length distribution data collected during surveys?

    Can anchovy age structure be estimated from length distribution data collected during surveys?

    Item type: Journal Article • Journal: African Journal of Marine Science
    Historically, a time-series of proportions-at-age 1 from annual November hydro-acoustic surveys has been used to inform the assessment of, and in particular the choice of appropriate values for juvenile and adult natural mortality for, the South African anchovy Engraulis encrasicolus...
  2. Influences of the abundance and distribution of prey on African penguins <em>Spheniscus demersus</em> off western South Africa

    Influences of the abundance and distribution of prey on African penguins <em>Spheniscus demersus</em> off western South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Off South Africa, anchovy Engraulis encrasicolus and sardine Sardinops sagax are the main prey of African penguins Spheniscus demersus. The combined spawner biomass of these fish increased from less than one million t in 1996 to more than nine million...
  3. Foraging strategies of coexisting lacertid lizards in the arid Tankwa Karoo Basin of South Africa

    Foraging strategies of coexisting lacertid lizards in the arid Tankwa Karoo Basin of South Africa

    Item type: Journal Article • Journal: African Zoology
    Four lacertid lizards, Pedioplanis laticeps, P. lineo-ocellata, Meroles knoxii and Nucras tessellata, occur sympatrically on the arid plains of the Tankwa Karoo Basin in South Africa. The aim of this study was to evaluate the significance of foraging strategy in...
  4. Radial variation of wood properties in <em>Neolamarckia cadamba</em> trees from an East Java community forest

    Radial variation of wood properties in <em>Neolamarckia cadamba</em> trees from an East Java community forest

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Radial variations in wood properties, cell morphologies and cell proportions were investigated for nine 4-year-old Neolamarckia cadamba trees planted in a community forest in East Java, Indonesia. The relationships between stem diameter and wood properties, cell morphologies or cell proportions...