Bermin lake

from Wikipedia, the free encyclopedia
Bermin lake
Photo-request.svg
Image wanted BW
Geographical location Region Sud-Ouest , Cameroon
Tributaries none
Drain to the Cross River
Location close to the shore Kumba
Data
Coordinates 5 ° 9 '33 "  N , 9 ° 38' 1"  E Coordinates: 5 ° 9 '33 "  N , 9 ° 38' 1"  E
Bermin Lake (Cameroon)
Bermin lake
surface 0.5 km²dep1
length 700 mdep1

particularities

Maar

Template: Infobox See / Maintenance / EVIDENCE AREA

The Lake Bermin is a small crater in the region Sud-Ouest Cameroon , between the Banyang-Mbo nature reserve and the Bakossi National Park in the Bakossi Mountains . It reaches a diameter of 700 meters and a depth of 16 meters. The circular lake has no inflow and drains into the river basin of the Cross River . The water of the lake is slightly alkaline and soft, with a conductivity of 80 mS. The lake floor consists of a mixture of mud and silt and is covered with numerous rocks, as well as leaves, branches and tree trunks, as the shore of the lake is overgrown with dense jungle.

fauna

Despite its small size, the lake is home as a result of sympatric speciation nine small stature and very difficult to be distinguished endemic cichlids in the genus coptodon ( C. bakossiorum , C. bemini , C. bythobates , C. flava , C. gutturosa , C. imbriferna , C. snyderae , C. spongotroktis and C. thysi ). Most of these tilapins feed on detritus . Food specialists are C. imbriferna , a phytoplankton - filter feeders and C. spongotroktis , which refers to feeding on sponges specializes.

All cichlids in the lake are critically endangered on the IUCN Red List of Endangered Species .

In addition to the nine cichlids, there are only two other fish species in the lake, a small carp fish from the relatives of Enteromius aboinensis and a splendid carp fish from the Fundulopanchax mirabilis group (= subgenus Paraphyosemion ).

See also

swell

  1. ↑ Uli Schiewen: Diversity in the smallest of spaces - Cameroon's south-western province. in DATZ , 2/2003, ISSN  1616-3222
  2. ↑ a b U.K. Schliewen, D. Tautz and S. Pääbo (1994): Sympatric speciation suggested by monophyly of crater lake cichlids. Nature 368 (6472): 629-632.
  3. ^ A b Claudia Dickinson: The Tilapia of Lake Bermin, Cameroon. PDF ( Memento of the original from March 13, 2012 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.faas.info
  4. ↑ a b c Freshwater Ecoregions of the World (2008). Western Equatorial Crater Lakes. ( Memento of the original from October 5, 2011 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.  @1@ 2Template: Webachiv / IABot / www.feow.org
  5. ↑ Coptodon bakossiorum on Fishbase.org (English)
  6. ↑ Coptodon bemini on Fishbase.org (English)
  7. ↑ Coptodon bythobates on Fishbase.org (English)
  8. ↑ Coptodon flava on Fishbase.org (English)
  9. ↑ Coptodon gutturosa on Fishbase.org (English)
  10. ↑ Coptodon imbriferna on Fishbase.org (English)
  11. ↑ Coptodon snyderae on Fishbase.org (English)
  12. ↑ Coptodon spongotroktis on Fishbase.org (English)
  13. ↑ Coptodon thysi on Fishbase.org (English)