FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2079062904> ?p ?o ?g. }

• W2079062904 endingPage "225" @default.
• W2079062904 startingPage "177" @default.
• W2079062904 abstract "SUMMARY South Africa's marine ecosystems have a wide variety of top predators, including both cartilaginous and teleost fish, 15 breeding seabirds and many more that are migratory to the region, seals, whales and smaller cetaceans. Land-breeding seabirds and seals were readily accessible to early colonists, and together with the obvious larger whales, were among the earliest marine resources to be exploited intensively. A number of species had been reduced to low levels by the start of the 20th century. Early research had two main objectives, in the case of exploited species investigation of factors influencing yields, and in the case of non-utilized species, such as many of the region's fish, the documentation of species. The landing of whale carcases at mainland whaling stations provided opportunity to investigate the biology of larger whales. As fisheries on the prey of top predators developed, some of the predators were regarded as competitors of fishermen. Research then aimed to quantify the competition, and included investigation of population size, diet and consumption, and species interactions in an ecosystem context. As fisheries expanded, some prey stocks collapsed and some seabirds decreased in abundance. This prompted research into the use of seabirds as indicators of the state of fish resources. In KwaZulu-Natal, attacks by sharks on man led to research aimed at reducing the incidence of attacks and the introduction of shark nets, which, due to their non-selectivity, had an influence on several species. Direct exploitation, depletion of prey resources, and incidental mortality, such as in the shark-net fishery, led to deterioration in the conservation status of several of South Africa's top predators, notably some sparids, seabirds and cetaceans. Consequently, much recent research has addressed issues of conservation concern, with the aim of securing sound management of predator populations. Issues of continuing concern include scarcity of food, incidental mortality and oiling and other forms of pollution. Top predators are expected to earn considerable revenue through ecotourism and recreational pursuits, and this is likely to become a focus of future research. Because of the migratory nature of many top predators, it is foreseen that their management will become multinational and it is expected that the funding basis for research will broaden to include non-governmental agencies. The advancement of technology will lead to automation of some monitoring studies and increased understanding of at-sea behaviour. The discovery during the celebrations of 100 years of marine science in South Africa of a fifteenth species of seabird breeding in the country suggests that the era of exploration and documentation has not yet closed." @default.
• W2079062904 created "2016-06-24" @default.
• W2079062904 creator A5006051784 @default.
• W2079062904 creator A5025732601 @default.
• W2079062904 creator A5070820106 @default.
• W2079062904 date "1997-01-01" @default.
• W2079062904 modified "2023-09-23" @default.
• W2079062904 title "TOP PREDATORS IN SOUTHERN AFRICA'S MARINE ECOSYSTEMS" @default.
• W2079062904 cites W123730344 @default.
• W2079062904 cites W1964228522 @default.
• W2079062904 cites W1965354625 @default.
• W2079062904 cites W1967248477 @default.
• W2079062904 cites W1970023488 @default.
• W2079062904 cites W1970023638 @default.
• W2079062904 cites W1972833576 @default.
• W2079062904 cites W1973014954 @default.
• W2079062904 cites W1974058635 @default.
• W2079062904 cites W1974220773 @default.
• W2079062904 cites W1974507916 @default.
• W2079062904 cites W1975167969 @default.
• W2079062904 cites W1976685602 @default.
• W2079062904 cites W1980946426 @default.
• W2079062904 cites W1981125545 @default.
• W2079062904 cites W1981196182 @default.
• W2079062904 cites W1987788751 @default.
• W2079062904 cites W1989109932 @default.
• W2079062904 cites W1990554913 @default.
• W2079062904 cites W1991175831 @default.
• W2079062904 cites W1992238784 @default.
• W2079062904 cites W1994605171 @default.
• W2079062904 cites W1998781513 @default.
• W2079062904 cites W2002083580 @default.
• W2079062904 cites W2008974859 @default.
• W2079062904 cites W2010847267 @default.
• W2079062904 cites W2013181570 @default.
• W2079062904 cites W2015234827 @default.
• W2079062904 cites W2015395726 @default.
• W2079062904 cites W2015425978 @default.
• W2079062904 cites W2015651930 @default.
• W2079062904 cites W2015769786 @default.
• W2079062904 cites W2016891005 @default.
• W2079062904 cites W2017085677 @default.
• W2079062904 cites W2019630676 @default.
• W2079062904 cites W2019854685 @default.
• W2079062904 cites W2021891499 @default.
• W2079062904 cites W2028797748 @default.
• W2079062904 cites W2032094170 @default.
• W2079062904 cites W2032945545 @default.
• W2079062904 cites W2034026570 @default.
• W2079062904 cites W2035454980 @default.
• W2079062904 cites W2037048105 @default.
• W2079062904 cites W2038153543 @default.
• W2079062904 cites W2042930203 @default.
• W2079062904 cites W2044102248 @default.
• W2079062904 cites W2045644792 @default.
• W2079062904 cites W2045709739 @default.
• W2079062904 cites W2050601695 @default.
• W2079062904 cites W2050954816 @default.
• W2079062904 cites W2053024283 @default.
• W2079062904 cites W2053148191 @default.
• W2079062904 cites W2053300677 @default.
• W2079062904 cites W2053814907 @default.
• W2079062904 cites W2053916951 @default.
• W2079062904 cites W2054161184 @default.
• W2079062904 cites W2058643877 @default.
• W2079062904 cites W2059613695 @default.
• W2079062904 cites W2060215209 @default.
• W2079062904 cites W2066779678 @default.
• W2079062904 cites W2068987488 @default.
• W2079062904 cites W2072300301 @default.
• W2079062904 cites W2081984485 @default.
• W2079062904 cites W2083774872 @default.
• W2079062904 cites W2087232061 @default.
• W2079062904 cites W2088224522 @default.
• W2079062904 cites W2092621949 @default.
• W2079062904 cites W2103127759 @default.
• W2079062904 cites W2106849464 @default.
• W2079062904 cites W2122036343 @default.
• W2079062904 cites W2147758150 @default.
• W2079062904 cites W2150409437 @default.
• W2079062904 cites W2152204923 @default.
• W2079062904 cites W2153069627 @default.
• W2079062904 cites W2292660958 @default.
• W2079062904 cites W2308843645 @default.
• W2079062904 cites W2312401788 @default.
• W2079062904 cites W2316494424 @default.
• W2079062904 cites W2318021863 @default.
• W2079062904 cites W2318257544 @default.
• W2079062904 cites W2321874867 @default.
• W2079062904 cites W2327587842 @default.
• W2079062904 cites W2328665350 @default.
• W2079062904 cites W2332719306 @default.
• W2079062904 cites W2339183570 @default.
• W2079062904 cites W2416168070 @default.
• W2079062904 cites W2485672358 @default.
• W2079062904 cites W2489608226 @default.
• W2079062904 cites W2564642455 @default.
• W2079062904 cites W2795499502 @default.

• next