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Lepisosteus oculatus


Lepisosteus oculatus
Spotted Garfish
斑点雀鳝
The spotted Gar (Lepisosteus oculatus) is a primitive freshwater fish of the family Lepisosteidae, native to North America from the Lake Erie and southern Lake Michigan drainages south through the Mississippi River basin to Gulf Slope drainages, from lower Apalachicola River in Florida to Nueces River in Texas, USA. It has a profusion of dark spots on the body, head and fins. Spotted gar are long and have a elongated mouth with many teeth used to eat other fish. They grow to 30 inches in length and weigh 4-6 pounds on average making it the smallest gar out of the four species of gar. The name Lepisosteus is Greek for "bony scale". Habitat for spotted gar is clear pools of shallow water and they are found in creeks, rivers and lakes.
The spotted gar Lepisosteus oculatus is a part of the Gar family (Lepisosteidae).They are notable for being one of the few extant fish species with ganoid scales. They have been known to hybridize with (and look similar to) Florida gars. It occurs in quiet, clear pools and backwaters of lowland creeks, small to large rivers,oxbow lakes, swamps and sloughs. It occasionally enters brackish waters. The fish is a voracious predator feeding on various kinds of fishes and crustaceans. Gars spawn in shallow water with lots of vegetation and cover. The spawning season occurs from April to May. A female can have multiple mating partners and the female is usually larger than the males it's mating with. The amount of eggs the female lays do vary and it can be up to about 20,000 eggs, but on average bout 13,000 eggs. They lay their eggs on leaves of aquatic plants. The eggs are green in color and have an adhesive coating to them that keeps them attached to aquatic vegetation. After 10 to 14 days the eggs hatch. At this stage in their life the gar are most vulnerable. The lifespan for L. oculatus varies between males and females. T

又名雀鳝,鸭嘴鳄,雀鳝科。原产地北美洲的五大湖区,属雀鳝科。体长75CM,最长的据报道可达6米,长筒形。嘴部前突,上下颌有骨板,有牙齿,酷似鳄鱼嘴。体青灰色,体表有暗黑色花纹。皮肤有硬鳞覆盖,皮坚鳞厚,皮肤粗糙。雀鳝有微毒,煮熟后可去掉,但不建议食用。雀鳝卵有巨毒,人类或其他热血动物不慎食用将导致死亡!!雀鳝和它所产的卵都含剧毒,不可食用!雀鳝有微毒,煮熟后可去掉一部分,但很危险建议不食用。雀鳝卵有巨毒,人类或其他热血动物不慎食用将导致死亡!如不要请杀死,不要放生破坏本地生态环境!!!
  饲养水温20-26℃,水质要求不严。饵料有小活鱼、鱼肉、水蚯蚓等,容易饲养。在水族箱中很难繁殖。雀鳝〔在英国撒克逊语中是长矛的意思)是一种淡水鱼,生活于热带河流、美国南部湖泊、中美地区、墨西哥以及西印度群岛等地。雀鳝是一种凶猛的食肉鱼,长着长长的嘴巴和尖尖的牙齿。这种鱼会攻击它所遇见的所有鱼类,捕食时,它会一动不动的装死,直到猎物靠近它时才发起致命的一击,然后围着被咬死的鱼转一至两圈后再将其吃掉。当地渔民都将其视做不祥之物,因为在它生存的地方很少有其他鱼类存在。当地渔民一般都不愿意吃这种鱼,同时它也不太适合食用。雀鳝全身长了一层菱形鱼鳞,看上去就像武士穿的盔甲一样异常坚硬,实际上它是由无机盐组成的。许多已灭绝的远古鱼类也有这种鱼鳞。像其他远古鱼类一样,雀鳝体内也长了一个与食道相连的鱼鳔,可用来呼吸。雀鳝卵有巨毒,人类或其他热血动物不慎食用将导致死亡。来自北美洲。那长而有力的嘴使它成为淡水中凶猛无比的肉食性鱼类。它用像人一样的鼻子来吸取空气中的氧气。雀鳝和弓鳍鱼有近缘关系,是从古代就生存下来的鱼类。现在只分布在北美洲及其附近,而在古代时却分布在全世界各地的淡水区域,在欧洲曾发现1.2亿年前的化石。身体被菱形的硬鳞所覆盖,鳞质甚硬,多数种类的口尖如鳄鱼。
  由于其生性凶猛,生存能力强,若任其在本地繁衍,将对当地渔业造成巨大危害。它出现在天然水域是十分危险的事情,以肉食为主,极有可能对本地鱼类造成毁灭性的危害。
  在广东,一养殖户的鱼塘里曾经“混”进了两条雀鳝,结果一个月时间,整个鱼塘的鱼都被吃光,其危害程度可见一斑。另外,由于雀鳝的卵有剧毒,一旦有人误食,可能致命。
  市民如果发现雀鳝或其它奇怪物种,应及时向渔政部门报告,更不能随意向天然水域中放生外来物种,避免造成生物入侵,使当地鱼类资源和物种蒙受无可挽回的损失。
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