jerre050978
Well-known member
Dit is mijn impressie van een zijbeekje van de Koyna-rivier in India, vlakbij de samenvloeiing met de Krishna-rivier.
Dimensies: 70*50*35 (l*d*h)
Technische omschrijving:
Verlichting: 1 x Aquatlantis Easy Led 6800 K (28 W)
Filter: interne bioloog, gevoed door een pomp van 700 l/h
Substraat: Keien en gravel van verschillende maten, gecombineerd met zandvlakte
Automatische waterverversing en thermostaat 200 W (tijdgeschakeld en uitgeschakeld tijdens de winter)
Planten: geen
Vissen: Botia striata and Devario aequipinnatusis
Biotope description:
[size]This aquarium simulates a small tributary of the Koyna river near the confluence with Krishna river.
Koyna river originates near Mahabaleshwar and is one of the major tributaries to the Krishna river. Koyna River flows in a southward direction for about 65km, turns sharply eastwards at Helwak, in which direction it flows until its confluence with the Krishna River at Karad.
Stream velocity, temperature and pH in these streams are driven by monsoon. The water in this small stream that drains into Koyna river is well oxygenated and relatively soft. Temperature is fluctuating 15-27�C, pH 6,8-7,5.
No macrophytes can be found in this system. River bottom consists of gravel and cobbles of different sized and some sandy parts.
Botia striata and Devario aequipinnatusis live sympatric with several other fish species in these waters (Labeo porcellus, Puntius jerdoni, Rohtee ogilbii, Schismatorhynchos nukta, Tor khudree and Neotropius khavalcho and many, many more). Cyprindae are the dominant group with the beautiful endemic Puntius sahyadriensis, which seems to be dissapeared in the hobby.
Koyna river system is relatively less threathened by anthropogenic pressure, although fishing pressure, tourism and organic pollution in some parts of the river coul not be neglected. A major part of the Koyna River backwaters is also protected by the Koyna Wildlife Sanctuary. Sadly enough climate change is having a unpredictable impact on the water quality. Changes in extremes during monsoon are already observed.
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