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 Naslov prispevka: Dawkinsia exclamatio
UNREAD_POSTObjavljeno: 12. apr 2012 07:01 
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Dawkinsia exclamatio (Pethiya­goda & Kottelat, 2005)

> Red: Cypriniformes > družina: Cyprinidae
Sinonim: Puntius exclamatio
Etimologija: rod je dobil ime po britanskemu evolucijskemu biologu in etologu Richard-u Dawkins-u, v čast za njegov izjemen in popularen prispevek k biologiji in evolucijski znanosti. Vrstno ime exclamatio=

> Tuja Imena:
> Sorodne vrste v rodu Dawkinsia*:
- Dawkinsia filamentosa (Valenciennes, 1844)
- D. arulius (Jerdon, 1849),
- D. assimilis (Jerdon, 1849),
- D. rohani (Rema Devi, Indra & Marcus Knight, 2010),
- D. ru­brotinctus (Jerdon, 1849),
- D. singhala (Duncker, 1912),
- D. srilankensis (Sena­nayake, 1985),
- D. tambraparniei (Silas, 1954).
Rod je omejeno razprostranjen le v južni Indiji in na Sri Lanki.

> Domovina: Indija; Puntius exclamatio is endemic to India where it is restricted to a small range and area in the Kallada River, in southern Kerala. Itit is found both upstream in the tributaries of Umayar and Kulathupuzhayar as well as about 2 km downstream of the Thenmala (Kallada Irrigation Project) dam on the Kallada River. The species is impacted by the exotic species Cyprinus carpio, which are regularly introduced into the dam reservoir and the species has also lost a large section (about 70%) of suitable habitat due to the construction of the dam and illegal dynamite fishing (including within the protected area that covers an estimated 80% of the species range). Based on these potential threats the species' status can be justified as Endangered.
> Biotop/habitat: Occurs in clear-water, rock and pebble substrate areas. Inhabits both slow-flowing pools and relatively fast-flowing areas. Inhabits various riverine habitat types, and conditions likely to vary depending on time of year with significant increases in water volume, chemistry, and turbidity likely during the annual monsoons. In March 1996 the type locality contained clear, shallow slowly-flowing (depth < 50 cm) water and D. exclamatio was collected among granite boulders alongside the congener D. assimilis (Pethiyagoda and Kottelat, 2005a).
> Adults are distinguished from all other Indian and Sri Lankan Dawkinsia by possessing unique color pattern: a black blotch 2-3 scales wide starting on and above scale 6 or 7 of lateral line series; and another horizontally-elongate, black, tear-shaped blotch about 1 1/2 scales high commencing on lateral line slightly anterior to or above anal-fin origin, on about lateral-line scale row 13 and continuing to caudal fin base
> V: 8 - 10 cm.
> akvarij min. 120 cm
> T.= 19 – 25 °C
> pH: 6.0 – 7.5; trdota: 36 – 179 ppm
> IUCN Red List Category & Criteria: Endangered
> Posebnosti: There is a case, however, to suggest that D. exclamatio is not actually a distinct taxon but rather a natural hybrid between D. assimilis and a D. arulius-like fish (possibly D. rubrotinctus) which occur together at its type locality in the Kallada River at Thenmalai.

Slika
Image 3. A - P. rohani sp. nov. (holotype); B - P. rohani sp. nov. juvenile; C - P. rohani sp. nov. (paratype, ZSI/SRS F.8345, 80mm SL); D - P. filamentosus (live specimen, uncatalogued); E - P. filamentosus juvenile (live specimen, uncatalogued); F - P. tambraparniei (ZSI/SRS F.8369, 57mm SL); G - P. tambraparniei juvenile (ZSI/SRS F.8370, 14mm SL); H - P. exclamatio (live specimen, uncatalogued); I, J - P. assimilis (ZSI/SRS F.8371, 84mm SL); K - P. arulius (ZSI/WGRC F.3954, 74mm SL).
http://threatenedtaxa.org/ZooPrintJourn ... i_figs.htm

Slika
D. ru­brotinctus (Jerdon, 1849) - © Choy Heng Wah

> Reference: Pethiyagoda, R. & M. Kottelat. 2005. A review of the barbs of the Puntius filamentosus group (Teleostei: Cyprinidae) of Southern India and Sri Lanka. Raffles Bulletin of Zoology Supplement 12: 127-144. http://rmbr.nus.edu.sg/rbz/biblio/s12/s12rbz127-144.pdf
(A new species, P. exclamatio, is described from the Kallada River, southern Kerala State...).

Sri Lanka identifies new genus of fresh-water fish
> Pethiyagoda et al (2012): A synopsis of the South Asian fishes referred to Puntius (Pisces: Cyprinidae). Ichthyol. Explor. Freshwaters, Vol. 23, No. 1, pp. 69-95, 11 figs., 4 tabs., June 2012
http://t.co/tDVmVXA2 [/size]



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