Articles by Keyword: Predatory Sharks

Search results for Predatory Sharks

We found 13 results for you
  1. Reflection on the first five years of South Africa’s Acoustic Tracking Array Platform (ATAP): status, challenges and opportunities

    Reflection on the first five years of South Africa’s Acoustic Tracking Array Platform (ATAP): status, challenges and opportunities

    Item type: Journal Article • Journal: African Journal of Marine Science
    The Acoustic Tracking Array Platform (ATAP) is a marine science programme that monitors the movements and migrations of inshore marine animals along the South African coastline. Acoustically tagged animals are monitored by an expanded network of approximately 100 automated data-logging...
  2. Some observations on the reproductive biology of The sixgill shark <em>Hexanchus griseus</em> (Bonnaterre, 1788) from southern African waters

    Some observations on the reproductive biology of The sixgill shark <em>Hexanchus griseus</em> (Bonnaterre, 1788) from southern African waters

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Observations are made of the maturation status of 81 male and 88 female sixgill sharks Hexanchus griseus from southern African waters. Males mature at about 310 cm total length (TL) with the calcification of the terminal cartilage elements of the...
  3. Influence of the annual sardine run on catches of large sharks in the protective gillnets off KwaZulu-Natal, South Africa, and the occurrence of sardine in shark diet

    Influence of the annual sardine run on catches of large sharks in the protective gillnets off KwaZulu-Natal, South Africa, and the occurrence of sardine in shark diet

    Item type: Journal Article • Journal: African Journal of Marine Science
    Shark catches in the protective nets set off the beaches of KwaZulu-Natal (KZN), South Africa, are strongly influenced by the sardine run, the winter influx of shoals of Sardinops sagax from the south-west. The effect of the sardine run, which...
  4. Distribution and movement of scalloped hammerhead <em>Sphryna lewini</em> and smooth hammerhead <em>Sphyrna zygaena</em> sharks along the east coast of southern Africa

    Distribution and movement of scalloped hammerhead <em>Sphryna lewini</em> and smooth hammerhead <em>Sphyrna zygaena</em> sharks along the east coast of southern Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Knowledge of population distribution and movement is crucial for the conservation and management of shark species occurring in coastal waters. From 1984 to 2009, 641 scalloped hammerheads Sphyrna lewini, 1 342 smooth hammerheads Sphyrna zygaena and 1 352 unspecified hammerheads...
  5. A first description of the artisanal shark fishery in northern Madagascar: implications for management

    A first description of the artisanal shark fishery in northern Madagascar: implications for management

    Item type: Journal Article • Journal: African Journal of Marine Science
    In the past two decades, small, targeted artisanal shark fisheries have developed in the extreme north of Madagascar, largely in response to the shark fin trade. Few studies have been undertaken to assess the biological characteristics and impact of these...
  6. A preliminary study of allozyme differences amongst <em>Carcharhinus</em> sharks from the continental slope near Abidjan, Côte d'lvoire

    A preliminary study of allozyme differences amongst <em>Carcharhinus</em> sharks from the continental slope near Abidjan, Côte d'lvoire

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Genetic variability of fifty-five shark specimens from the genus Carcharhinus was analysed using 18 allozyme loci. Sixteen loci were polymorphic either within, or between, species. Levels of genetic polymorphism, as measured by observed heterozygosity values, ranged from 0.008 (±0.008) to...
  7. Influence of largemouth bass, <em>Micropterus salmoides</em>, on abundance and habitat selection of Cape galaxias, <em>Galaxias zebratus</em>, in a mountain stream in the Cape Floristic Region, South Africa

    Influence of largemouth bass, <em>Micropterus salmoides</em>, on abundance and habitat selection of Cape galaxias, <em>Galaxias zebratus</em>, in a mountain stream in the Cape Floristic Region, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Predatory alien fishes have been widely introduced into streams in the Cape Floristic Region (CFR), South Africa, but little is known about their effect on native fishes. Results from this 2006 study suggest that the presence of alien predatory largemouth...
  8. Pelagic shark bycatch in the tuna- and swordfish-directed longline fishery off southern Africa

    Pelagic shark bycatch in the tuna- and swordfish-directed longline fishery off southern Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    The capture of pelagic sharks as bycatch of the South African pelagic longline fleet targeting tuna Thunnus spp. and swordfish Xiphias gladius was investigated during the period 1998-2005. In all, 26 species were caught, of which six are listed by...
  9. The predator defence system of an African king cricket (Orthoptera: Anostostomatidae): does it help to stink?

    The predator defence system of an African king cricket (Orthoptera: Anostostomatidae): does it help to stink?

    Item type: Journal Article • Journal: African Zoology
    We examined the putative defence system of a king cricket, Onosandrus sp., in particular the efficacy of the noxious faeces against two types of predator: a lizard, the skink Mabuya striata (an active, diurnal forager), and the toad Bufo gutturalis...
  10. White shark (<em>Carcharodon carcharias</em>)-inflicted bite wounds observed on Cape fur seals (<em>Arctocephalus pusillus pusillus</em>) at Black Rocks, Algoa Bay, South Africa

    White shark (<em>Carcharodon carcharias</em>)-inflicted bite wounds observed on Cape fur seals (<em>Arctocephalus pusillus pusillus</em>) at Black Rocks, Algoa Bay, South Africa

    Item type: Journal Article • Journal: African Zoology
    This paper presents the first quantitative study on the seasonal occurrence and body location of white shark (Carcharodon carcharias)-inflicted injuries on Cape fur seals (Arctocephalus pusillus pusillus) at Black Rocks, in Algoa Bay. Between January 2010 and October 2011, 22...