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n Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie - Prooimanipulasie in 'n grasveldgemeenskap op 'n binnelandse lughawe in Suid-Afrika : research and review article

Volume 21, Issue 4
  • ISSN : 0254-3486
  • E-ISSN: 2222-4173

Abstract

<b>Prey manipulation in a grassland community at an inland airport in South Africa</b> <br>Terrestrial invertebrates and very small vertebrates were collected using pitfall and mouse traps in undisturbed long grass and grass which were kept permanently short over a period of 15 months (March 1994 - May 1995) at the Bloemfontein airport. Numerically insects contributed more than 90% of the overall sample. Twice as many individuals occurred in short grass compared to those in the long grass. The available food source for predominantly insectivorous avifauna at inland airports can thus be effectively reduced (indirectly also bird numbers) by implementing a so-called long grass policy as a control strategy. A significant and sustainable decrease in harvester termite numbers and activities was accomplished by administering bait treated with Gaucho in disturbed grass areas. As an important component in the diet of birds in grassland communities, bird numbers, and hopefully also bird aircraft strikes, can thus be reduced.

Grondlewende invertebrate en kleinere vertebrate is deur middel van put- en muisvalle in onversteurde lang gras en gras wat permanent kort gehou is oor 'n tydperk van 15 maande (Maart 1994 - Mei 1995) op die Bloemfontein-lughawe versamel. Getalsgewys het insekte meer as 90% van alle vangste uitgemaak, waarvan meer as dubbel soveel individue in die kort- as langgrasgebiede aangetref is. Die beskikbare voedselvoorraad vir oorwegend insekvretende avifauna op binnelandse lughawens sal dus effektief verminder kan word (indirek ook voëlgetalle) deur 'n sogenaamde langgrasbeleid as beheerstrategie toe te pas. 'n Betekenisvolle en volgehoue afname in grasdraertermiet-getalle en -aktiwiteite is deur die toediening van Gaucho-behandelde lokaas in versteurde grasgebiede bewerkstellig. As belangrike komponent in die dieet van voëls in grasveldgemeenskappe kan voëlgetalle, en hopelik ook trefongelukke met vliegtuie, sodoende verminder word.

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/content/aknat/21/4/EJC20317
2002-12-01
2019-08-24

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