วันเสาร์ที่ 12 มกราคม พ.ศ. 2556

Fish Data : Bagarius bagarius ( Devil Catfish )


Bagarius bagarius แค้วัวสีเหลืองนวล ตามตัวไม่มีกระ

    Bagarius bagarius is commonly known as the Devil Catfish, which is also referred to as Bagarius yarellii. This catfish is quite a rare find amongst shipments of fish from Asia. Bagarius bagarius belongs to the family Sisoridae which are more commonly referred to as Asian Hillstream Catfishes. Within this group of catfish there are around 23 genera and 85 species. As their family name suggests they are naturally found in the fast flowing freshwaters of southern Asia. Most of the catfish within the family Sisoridae are small to medium in size from 6-30cm, with the exception of Bagarius with representative species growing in excess of 2 metres! Bagarius are described as predatory fish quite unlike the other members of the family Sisoridae which tend to be omnivorous. In its natural habitat Bagarius will live under bogwood or logs in fast flowing rivers in wait of its next victim. All of the Hillstream Catfishes are able to inhabit mountain streams by virtue of the fact that the skin on the undersides of their bodies is adapted by being corrugated thus acting as an adhesive attachment to rocks and stones. In addition to the skin being corrugated or folded another factor making these fish better able to withstand the strong water currents they have flattened heads. 

Careing :  


    The Devil Catfish is essential to provide the fish with oxygen-rich water due to the fact that these fish are from highland streams. I personally found it essential to provide good filtration and water movement in order to keep this fish in optimum condition.



Natural habitat: India, Burma, Thailand, Vietnam, Sumatra, Borneo

Aquarium size: For a juvenile catfish a minimum size of aquarium would be 36” x 18” x 18”, for a semi-mature specimen of up to 36” I would suggest at least a 72” x 36” x 36” and for an adult sized fish a large public aquarium!

Temperature: 18-25ºC or 64-77ºF

pH: 6.5-7.8 although it is documented that pH 7.0 is optimum.

Hardness: It is documented that juvenile specimens prefer hardness up to 12ºdGH, but that adult fish can tolerate a hardness of up to 30ºdGH.

Sexual differences: There are no documented or observed external sexual differences.

Breeding: There are no known records of this catfish having been bred in captivity, most likely due to their adult size and size of aquarium/tropical pond required for them.

Diet: As its common name suggests this truly is a demon amongst the fish world, requiring meaty foods at all times. In the wild this fish would predate upon smaller fishes, but in an aquarium it can be persuaded to feed upon cockles, mussels, whole prawns, dead fish and earthworms. It is also documented that this catfish when kept with fish bigger than itself it would eat their scales.

Compatibility: This really is a fish destined to live a solitary life due to the fact that I am convinced that it would eat just about any other occupant that it could fit inside its mouth.

Colouration: This catfish is quite attractively marked. The base colour of the body of this fish is light brown with dark brown to black mottled markings over the eyes, around the dorsal and adipose fins and at the base of the caudal peduncle. The fins share this mottled pattern of markings.


credit :

http://www.scotcat.com/articles/article82.htm

http://www.siamensis.org/webboard/topic/345#comment-2669



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