Freshwater Fish‎ > ‎Crayfish‎ > ‎

Cherax quadricarinatus


Cherax quadricarinatus
Red Claw Blue Crayfish
红钳蓝螯虾
Cherax quadricarinatus (known by several common names, including Australian red claw crayfish, Queensland red claw, redclaw, tropical blue crayfish, yabby and freshwater blueclaw crayfish) is an Australian freshwater crayfish.
C. quadricarinatus is found in permanent freshwater streams, billabongs and lakes on the north coast of the Northern Territory and northeastern Queensland. Populations are also found in Papua New Guinea. Through translocation by humans, the range has spread down to southern Queensland and into the far north of West Australia. C. quadricarinatus is considered an invasive species, and has established feral populations in South Africa, Mexico, Jamaica and Puerto Rico.
This tropical crustacean is very tolerant of environmental changes, and is primarily a detritivore.
The colour of C. quadricarinatus ranges from dark brown to blue-green and adult males have a distinct red patch on the outer margin of the claws. They can reach up to 600 grams (21 oz).
Females, which are smaller than males, spawn 300–800 olive-green eggs per brood, which are fertilised from a spermatophore which the male has deposited at the base of her walking legs (pereiopods) during mating. Fertilised eggs are affixed to the female's pleopods, situated on the underside of the tail. Incubation takes approximately six weeks and the newly hatched juveniles rapidly become independent.
澳洲淡水龙虾澳洲淡水龙虾又名红螯螯虾,隶属于十足目拟螯虾科,是一种大型淡水螯虾,原产于澳大利亚。该虾近年经广东省引进试养并先后取得人工繁殖种苗和成虾养殖成功,目前正陆续在省内外推广养殖。最近,湛江特种水产有限公司在国内率先进行室内工厂化繁殖澳洲淡水龙虾苗获得成功,并育出40多万尾虾苗供省内和上海、江苏、浙江的农村养殖户放养,为发展该虾解决种苗问题。 澳洲淡水龙虾因个体较大,且外形有些酷似海中龙虾,又只生活在淡水中,故被称为淡水龙虾。其个体一般重100~200克,在澳洲最大的个体可重达500克。 据研究,澳洲淡水龙虾是目前世界上的名贵经济虾种之一。
它生性喜暗怕光,善于爬行生活,不善游泳。通常白天隐匿在深水洞穴中,傍晚太阳下山后开始活动,大多聚集在浅水边爬行觅食寻偶,若受惊吓,便迅速逃回深水中。它生活要求水质清新,喜欢活水新水,并略呈咸性,还喜爱逆水上溯;适应性强,水温在15~35℃都能生存,能忍耐恶劣的气候环境,一般条件下能正常渡夏和越冬,当遇到环境不适时,还能爬上塘边陆地栖息。这种虾食性杂,既吃动物性饵料,也食人工饲料,既可精养也可粗养。据养殖显示,该虾生长快,成活率高,产量也高,在华南地区养殖一年便可性成熟,当年放养当年可收获上市,人工养殖管理得好,单造亩产可达400公斤以上。 澳洲淡水龙虾体大肥美,营养丰富,肉质细嫩、滑脆,味道鲜美香甜,风味别具一格,颇受国内外食客喜爱。更难得的是,澳洲淡水龙虾可安排在中国对虾、斑节对虾、墨吉对虾、白对虾等海产对虾收获上市后的冬季上市,因而货俏价好。加上它耐活,适宜于长途运输,可在市场、饭店酒楼供应活虾,还可出口国际市场,因此澳洲淡水龙虾养殖具有良好的发展前景。
澳洲淡水龙虾:原产澳大利亚,外形酷似海中龙虾,是目前世界上最名贵的淡水经济虾种之一。该虾体色褐绿,螯的外侧顶端有一膜质鲜红带,美丽好看,故又被誉为红螯螯虾。其外形美观,体色褐绿,头胸部和腹部均匀连接,外被一层坚硬外壳,并生有胸足5对,外被一坚硬外壳,并生有胸足5对,第一对胸足特别发达而成为强大的螯,雄性的螯比雌性更发达,螯的外侧还有1条膜质鲜红带,而其头部有触须6条,尾部则有5片尾扇,所以澳洲淡水龙虾样子威武且又美丽好看,因而兼有观赏价值。
Comments