Giant barb
| Giant barb | ||||||||||||
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Giant barb ( Catlocarpio siamensis ) |
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Catlocarpio | ||||||||||||
| Boulenger , 1898 | ||||||||||||
| Scientific name of the species | ||||||||||||
| Catlocarpio siamensis | ||||||||||||
| Boulenger , 1898 |
The giant barb , even Siamese giant carp ( Catlocarpio siamensis ) or Giant Siamese Carp is the only kind of genre Catlocarpio from the family of carp fish (Cyprinidae). It is the largest species in the family and an important food fish , some of which are also grown in aquaculture . Due to fishing and habitat loss, it is considered threatened, in Cambodia it has been declared a national fish.
features
The giant barb reaches a length of two to three meters and a weight of 150 to 300 kilograms. The largest giant barb caught on a line weighed over 120 kilograms, was over 150 centimeters long and was caught in 2007 in the commercial fishing lake Bung Sam Lan Lake in Thailand. The entire body, with the exception of the head and fins, is covered with large scales that are gray above the sideline and silvery below. The females are generally larger than the males and have a more curved belly during spawning season . The head is noticeably large and can make up 40% of the total length. The mouth has no barbels , the dorsal fin no hard ray . The first gill arch has a gill trap made of 90 to 110 long rays. The giant barb is very similar to the species Catla catla , from which it differs, however, in the area of distribution, the number of fin rays of the dorsal fin and the position of the pharynx. In addition, the giant barbel has a chromosome set with almost twice as many chromosomes (2n = 98), which is probably due to a tetraploidization after the two species were separated.
Occurrence
The giant barb is found in the river systems of the Mae Nam Chao Phraya and the Mae Nam Mae Klong in Thailand and the Mekong in Cambodia , Laos and Vietnam . Adult animals prefer deep regions of the main rivers, but migrate into flooded forests during the rainy season. The juveniles predominantly colonize wetlands and small tributaries.
Way of life
Giant barbels feed primarily on algae , phytoplankton and the fruits of flooded plants, but occasionally also eat fish and crustaceans. The animals become sexually mature when they are around seven years old and weigh nine kilograms. The spawning season is in July and August, the spawning grounds are still largely unknown. The eggs are light yellow to dark brown and swell from about one millimeter to three millimeters in diameter due to water absorption after being laid. About 11 to 13 hours after fertilization , the approximately 6 millimeter long larvae hatch. The animals grow to a weight of two to four kilograms within eight months.
Web links
- Catlocarpio siamensis inthe IUCN 2013 Red List of Threatened Species . Posted by: Hogan, Z., 2011. Retrieved December 18, 2013.
Individual evidence
- ↑ a b Appendix 4 of the Royal Decree No. NS / RKT / 0305/149 dated March 21, 2005 on the Designation of Animals and Plants as National Symbols of the Kingdom of Cambodia Online
- ^ Fishing World Records
- ↑ a b Niklas S. Mattson, Kongpheng Buakhamvongsa, Naruepon Sukumasavin, Nguyen Tuan, Ouk Vibol: Cambodia Mekong giant fish species: on their management and biology . In: MRC Technical Paper . tape 3 , 2002, ISSN 1683-1489 , p. 9–12 (English, mrcmekong.org [PDF]).
- ↑ a b c giant barbel on Fishbase.org (English)
- ↑ Atsushi Suzuki, Yashoiko Taki: karyotype and DNA content in the Cyprinid Catlocarpio siamensis . In: Japanese Journal of Ichthyology . tape 35 , no. 3 , 1988, pp. 389–391 (English, wdc-jp.biz [PDF]).