Articles by Author: A R Childs

Search results for A R Childs

We found 15 results for you
  1. Area-use patterns and diel movements of white steenbras <em>Lithognathus lithognathus</em> in a temporarily open/closed South African estuary, inferred from acoustic telemetry and long-term seine-netting data

    Area-use patterns and diel movements of white steenbras <em>Lithognathus lithognathus</em> in a temporarily open/closed South African estuary, inferred from acoustic telemetry and long-term seine-netting data

    Item type: Journal Article • Journal: African Journal of Marine Science
    Acoustic telemetry and long-term seine-netting data were used to assess distribution, area use, home range dynamics and movement patterns of estuarine-dependent juvenile white steenbras Lithognathus lithognathus in the temporarily open/closed East Kleinemonde Estuary. Using 15 years of biannual seine-netting data,...
  2. The trouble with estuarine fisheries in temperate South Africa, illustrated by a case study on the Sundays Estuary

    The trouble with estuarine fisheries in temperate South Africa, illustrated by a case study on the Sundays Estuary

    Item type: Journal Article • Journal: African Journal of Marine Science
    This study provides empirical data on the exploitation of fishery resources on the Sundays Estuary on the south-east coast of South Africa. Total annual effort was estimated at 63 785 angler-hours, which accounted for an annual yield of 16 214...
  3. Using baseline biological and ecological information to design a Traffic Light Precautionary Management Framework for leerfish <em>Lichia amia</em> (Linnaeus 1758) in southern Angola

    Using baseline biological and ecological information to design a Traffic Light Precautionary Management Framework for leerfish <em>Lichia amia</em> (Linnaeus 1758) in southern Angola

    Item type: Journal Article • Journal: African Journal of Marine Science
    The coastline of southern Angola is sparsely populated and, largely because of a protracted civil war, has very lightly exploited inshore fish stocks. This has provided the almost unprecedented opportunity to determine prefishing-state reference points and to implement management strategies...
  4. Estuarine use by spotted grunter <em>Pomadasys commersonnii</em> in a South African estuary, as determined by acoustic telemetry

    Estuarine use by spotted grunter <em>Pomadasys commersonnii</em> in a South African estuary, as determined by acoustic telemetry

    Item type: Journal Article • Journal: African Journal of Marine Science
    Factors influencing estuarine use and marine excursions by spotted grunter Pomadasys commersonnii in the Great Fish Estuary, South Africa, were studied using manual and automated telemetry methods. In all, 20 individuals, ranging from 362 mm to 698 mm total length...
  5. Estuarine habitat use by juvenile dusky kob <em>Argyrosomus japonicus</em> (Sciaenidae), with implications for management

    Estuarine habitat use by juvenile dusky kob <em>Argyrosomus japonicus</em> (Sciaenidae), with implications for management

    Item type: Journal Article • Journal: African Journal of Marine Science
    The spatial and temporal area-use patterns of estuarine-dependent juvenile dusky kob Argyrosomus japonicus in the Great Fish Estuary, South Africa, were examined using acoustic telemetry. In all, 29 individuals (307–400 mm total length) were surgically equipped with individually coded transmitters...
  6. First assessment of estuarine space use and home range of juvenile white steenbras, <em>Lithognathus lithognathus</em>

    First assessment of estuarine space use and home range of juvenile white steenbras, <em>Lithognathus lithognathus</em>

    Item type: Journal Article • Journal: African Zoology
    The spatial dynamics and home range sizes of early juvenile white steenbras (Lithognathus lithognathus Cuvier, 1829) in the permanently open Great Fish Estuary, South Africa, were assessed using acoustic telemetry. Seven individuals (154–184 mm fork length) tagged with acoustic transmitters...
  7. Movement behaviour of largemouth bass <em>Micropterus salmoides</em> in a South African impoundment

    Movement behaviour of largemouth bass <em>Micropterus salmoides</em> in a South African impoundment

    Item type: Journal Article • Journal: African Zoology
    The objectives of this study were to describe movements and area use patterns of largemouth bass Micropterus salmoides in relation to abiotic factors (water temperature, river inflow and water level). The study was conducted in the Kubusi arm of Wriggleswade...
  8. Influence of prey abundance and abiotic factors on the long-term home-range and movement dynamics of spotted grunter <em>Pomadasys commersonnii</em> in an intermittently open estuary

    Influence of prey abundance and abiotic factors on the long-term home-range and movement dynamics of spotted grunter <em>Pomadasys commersonnii</em> in an intermittently open estuary

    Item type: Journal Article • Journal: African Journal of Marine Science
    Long-term home-range and movement dynamics of spotted grunter Pomadasys commersonnii and the distribution of their dominant prey, the sandprawn Callichirus kraussi, were investigated in the intermittently open East Kleinemonde Estuary, South Africa. In addition, the effects of fish length, diel...
  9. Assessing trophic adaptability is critical for understanding the response of predatory fishes to climate change: a case study of <em>Pomatomus saltatrix</em> in a global hotspot

    Assessing trophic adaptability is critical for understanding the response of predatory fishes to climate change: a case study of <em>Pomatomus saltatrix</em> in a global hotspot

    Item type: Journal Article • Journal: African Journal of Marine Science
    There is a growing need to incorporate biotic interactions, particularly those between predators and their prey, when predicting climate-driven shifts in marine fishes. Predators dependent on a narrow range of prey species should respond rapidly to shifts in the distribution...