Βουτηχτάρα της Αλαότρα: Διαφορά μεταξύ των αναθεωρήσεων

The species declined in the course of the 20th century, mainly because of [[habitat destruction]] and predation by the introduced [[snakehead murrel]] (''Channa striata'').<ref>Andrianandrasana, Herizo T.; Randriamahefasoa, Jonah; Durbin, Joanna; Lewis, Richard E. and Ratsimbazafy, Jonah H. (2005): Participatory ecological monitoring of the Alaotra wetlands in Madagascar. ''Biodiversity and Conservation'' '''14'''(11): 2757–2774. <small>{{DOI|10.1007/s10531-005-8413-y}}</small> (HTML abstract)</ref> Also, the few remaining birds increasingly [[Hybrid (biology)|hybridized]] with Little Grebes which use the wetlands as a [[bird migration|migration]] stopover site; as the species differed in several key aspects, the hybrid birds may have suffered from decreased [[fitness (biology)|fitness]], to the detriment of the ''rufolavatus'' [[gene pool]].

 

 

The species was officially declared extinct in 2010, 25 years after the last confirmed sighting.<ref name=BirdLife1/><ref name=BirdLife2/><ref name="Walker, 2010-05-26">{{cite news |title=Bird conservation: Alaotra grebe confirmed extinct |first=Matt |last=Walker |url=http://news.bbc.co.uk/earth/hi/earth_news/newsid_8702000/8702598.stm |newspaper=[[BBC News]] |date=26 May 2010 |accessdate=26 May 2010}}</ref><ref name="Elliott, 2010-05-26">{{cite news |title=Alaotra grebe declared extinct after struggle against carnivorous fish |first=Valerie |last=Elliott |url=http://www.timesonline.co.uk/tol/news/environment/article7136627.ece |newspaper=[[The Times]] |date=26 May 2010 |accessdate=26 May 2010}}</ref> Although some species have been classified as extinct and later have been found to still exist, Leon Bennun, the director of the conservation organization [[BirdLife International]] has stated that "no hope remains for this species" and blames the "unforeseen consequences" of human action.<ref name="Elliott, 2010-05-26"/>

 

==References==

 

{{Grebes}}