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重庆渔民捕到3条珍稀中华鲟 2条死亡

发布时间: 2009-9-17 10:30 |  发布作者: shadow |  信息来源: 网络转载 |  查看: 237次


“我在长江捕到3条中华鲟,你们快来看一下。”昨上午8时20分左右,一个来自长江南岸广阳岛水域的电话,拨进南岸区峡口镇农业服务中心。

  捕获了珍稀中华鲟?还是3条?工作人员立即向南岸区农林水利局报告。遗憾的是,待渔政人员到场,3条鱼因在渔船鱼舱内缺氧,已死了两条。

  经专家鉴定,它们就是国家一级保护动物中华鲟。

  长江中捕到三条中华鲟

  渔船主人叫张军,广阳岛渔民,迄今捕鱼十多年。

  前晚7时许,张军在广阳岛长江边一处叫兔儿坪、鱼群较集中的江面撒网。网下五六米深,由渔船拖着捕捞。接连数次下网后,网中出现一条活蹦乱跳的鱼,凭经验他认为是罕见的中华鲟。至昨晨6时许,他在这个水域又捕到两条中华鲟。

  至此,3条中华鲟养进鱼舱,它们颜色差不多,长度均在40厘米左右,重约750克。

  “我打到的3条中华鲟,可能是政府放流的。”昨上午,张军向当地镇政府反映后,又给本报热线966988打来电话。

  他强调,在同一水域先后捕到3条中华鲟,应该跟近日江水暴涨有关。

  同水域今年两次捕获

  峡口镇农业服务中心介绍,昨上午10时许,南岸区渔政管理部门工作人员到现场,很小心地把3条中华鲟从鱼舱请出。经检查,每条都无明显外伤,其中两条死亡。渔政人员立即决定,马上将唯一活着的那条中华鲟放生。渔船驶到江中100多米后,它重回长江怀抱。

  中华鲟是稀有鱼种,属国家一级保护动物。峡口镇农业服务中心介绍,3条误捕的鱼可能是中华鲟,也不排除是同属国家一级保护动物的长江鲟。昨晚,西南大学动物科学系专家看了照片后,确认它们是中华鲟。

  据悉,今年6月16日,有渔民在广阳岛水域下网,误捕一条长1.28米、重13公斤的中华鲟,它是一天前由长江水产研究所在朝天门放流的,背鳍上有个追踪器;当月底,另一个渔民同样在广阳岛水域误捕一条中华鲟,它属野生,有一米多长。

  中华鲟死亡仍可领奖

  按我市渔政部门的相关规定,渔民误捕类似中华鲟的稀有鱼种后及时报告,可领相应奖金。这次,误捕3条中华鲟死亡两条,当事渔民是该受奖还是受罚?

  南岸区渔政部门表示,这次捕获的中华鲟中虽有两条已死亡,但死亡原因很明确——鱼舱缺氧造成,不属于渔民故意。张军能在先后捕到3条的状况下报告,说明他具备保护稀有鱼类的法律意识。因此,张军仍可领到奖金。

  本版稿件 首席记者 黄艳春

  中华鲟为何频频现身广阳岛

  长江广阳岛水域3次误捕中华鲟,莫非这里是中华鲟的鱼窝子?还是它们偶尔路过,运气不佳被捕捞?昨日,南岸区渔政部门提出几个可能性。

  A:前日,三峡蓄水,两江水位暴涨,此状况诱发鱼儿受惊乱窜。广阳岛水域是鱼群出没相对集中的地方,这次误捕的中华鲟是幼鱼,有群游特征,10多个小时在相同水域捕到3条就不足为奇了。

  B:今年4月底,我市向长江放流了50万尾鱼类,其中就有中华鲟幼鱼。这次误捕的3条鱼极可能属放流的中华鲟——它们的体长、重量和颜色有人工养殖特征。

  C:中华鲟有洄游习性,即性成熟后从大海游向长江入口,顺江游到它们出生地——金沙江繁育后代。现在,中华鲟洄游被三峡大坝阻隔。不过,三峡大坝以下已有中华鲟产卵的记载,而且大坝留有专供中华鲟通过坝体的孔。就此,这次误捕的中华鲟的出生地极可能是三峡大坝。

  D:三峡大坝未完全隔断长江时,3条中华鲟的母亲极可能已达到金沙江,它们出生后群游到我市水域,选择广阳岛水域作它们的生长场所。

  我市渔民多次误捕中华鲟

  ●2007年11月21日,长江巴南鱼洞江段,渔民误捕一条体长35厘米的野生中华鲟。渔政人员透露,这是我市两江在中华鲟几乎绝迹三四十年后,首次发现野生中华鲟,其意义不亚于“陕西发现野生华南虎”。

  ●去年6月22日和23日,长江奉节江段,两条被增殖放流、体长约50厘米的中华鲟被渔民误捕。

  ●今年6月16日,长江渝北洛碛江段,两个渔民误捕一条一天前增殖放流的中华鲟幼鱼。

  ●今年6月16日,长江广阳岛水域,渔民误捕一条长1.28米、重13公斤,属人工放流的中华鲟。当月底,一条野生中华鲟在这里被误捕。

TAG: 死亡 渔民 中华鲟 重庆
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