Nestanak malarije nema veze s unosom gambuzije...bas me zanima gdje si to procitao?
Ima vise razloga za to; prvo, komarci iz roda Anopheles (koji prenose Plasmodium parazite - uzrocnike
malarije) polazu jaja i u male lokve s vodom gdje ribe ne mogu ni zivjeti, u nakupine vode u gumama automobila, loncima
za cvijece (pitarima)...
Drugo, gambuzija unistava grabezljive beskraljeznjake koji se hrane licinkama komaraca, pa se stoga populacije komaraca mogu
povecati. Zabiljezeno je cak da je agresivna gambuzija istrijebila ribe koje su bolji predatori nad licinkama komaraca nego gambuzija.
Ovo nisu moje spekulacije nego rezultati znastvenih istrazivanja, a citirana su na webstranicama Americke vlade (USGS - glavnog vladinog centra
za zastitu bioloske raznolikosti u SADu). Cijela stranica ima hrpu informacija o ekoloskim katastrofama i izumiranjima koje su izazvane unosom gambuzije. Pogotovo
obratite paznju na odlomak 'IMPACT OF INTRODUCTION'.
''Although widely introduced as mosquito control agents, recent critical reviews of the world literature on mosquito control have not supported the view that Gambusia are particularly effective in reducing mosquito populations or in reducing the incidence of mosquito-borne diseases (Courtenay and Meffe 1989; Arthington and Lloyd 1989). Because of their aggressive and predatory behavior, mosquitofish may negatively affect populations of small fish through predation and competition (Myers 1967; Courtenay and Meffe 1989), and benefit mosquitos by decreasing competitive pressure from zoooplantion and predation pressure from predatory invertebrates (Blaustein and Karban 1990).''
''Introducing mosquitofish also can precipitate algal blooms when the fish eat the zooplankton grazers (Hurlbert et al. 1972), or in an
increase in the number of mosquitoes if the fish eat the invertebrate predators (Hoy et al. 1972, Bence 1988)''
Strava i uzas...
Poveznica:
http://nas.er.usgs.gov/queries/FactSheet.asp?speciesID=846
Tema: Gambuzije na Cresu. (Posjeta: 23475 vremena)