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蛇吃鹰:阿鲁巴岛的红尾蚺

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一楼喂度娘。@风神阿武 嘛嘛,这一段东西不长,翻译出来没压力吧。。。。




1楼2012-09-02 19:30回复
    这篇文是介绍红尾蚺指名亚种(Boa constrictor constrictor)被人为带到阿鲁巴岛后对当地生态环境的影响。岛上的红尾蚺甚至能捕食包括凤头卡拉鹰在内的猛禽。几张图片保存不了,@风神阿武 阿武酱顺便帮个忙吧图也弄下来吧。。。。。外国IP在百度上各种吃亏。。。。
    Boa c. constrictor - an invasive species on the island of Aruba
    Roel Uckerman and his wife Hesther are of Dutch descent. They are living on Aruba for 10
    years now. Mr. Uckerman is working for the Arubian coast guard.Aruba, Dutch West Indies is an island 20 kilometers off the coast of the peninsula Paraguana of Venezuela.
    Map of Aruba
    The size is approximately 190 square kilometers. The length is 31km and the most widen part has a width of 9km.
    Aruba belongs to the Kingdom of the Netherlands since 1636. Together with its neighbouring Islands Curacao and Bonaire, which are respectively 60nm and 120nm to the east.
    Aruba, scenery
    It is estimated that there are approximately 75.000 people living on Aruba, this is of course without illegal immigrants and tourists.
    You may ask yourself now, why we publish a report about this island on our website.
    The reason, that this is the first documented case that Boa constrictor has become an invasive species.
    Invasive species (Neobiota) are animals who were brought to an ecosystem by humans where they have not existed before and where they are firmly established now.
    Three criterions must be fulfilled by a species to be rated as neobiota:
    directly or indirectly introduced by humans
    introduction must have taken place after the year 1492 (beginning of the colonization and the related integration of the countries all over the world)
    self - reproducing population, who doesn't needs the help of humans to exist
    The Boa constrictor is not a native snake on the island of Aruba. Nevertheless nearly every day specimens up to 2 meters long are captured. In March 2005 a 6 ft. (1,80 m) long boa even visited the garden of Mr. and Mrs. Uckerman.
    Most likely irresponsible owners of pet Boa constrictors released their animals in the wild. Since these boas are fast breeders and since they adapted well on the environment of Aruba they are showing up everywhere, even in the city. This is also due to the fact that they have no natural enemies there.
    This newcomer in the snake world of Aruba is regarded as a plague by many of the natives.
    Aruba, scenery
    Some boas are born in sewage wells and people on Aruba say that if you're bitten by such a snake you're infected with bacteria from the sewage. Up till now nothing serious has happened. But the common opinion of the people on Aruba is that this snake ruins the original wildlife.
    These photos of a Boa constrictor were taken by the dutch tourist J. Beijaard during a vacation on Aruba. He kindly put it to our disposal.
    As one can see, the boa is just feeding on a large bird called warawara by the natives.
    It is amazing that such a large boa still ventures in such a precarious height.
    And this is the guy on the menu. The non-scientific name is Kuifcaracara, the latin name Polyborus plancus. This bird of prey is distributed in the U.S., South America and also on Aruba. It can grow to a length of 61 cm (2ft); the maximum wingspan is 130 cm (4,2 ft) and the maximum weight is 1500 g (3.3 pounds).
    photo und information: Wikiрedia
    There are 2 native snakes on the island. The Santanero and the Cascabel. The Cascabel is a poisonous rattlesnake which only lives in the wild on Aruba. The maximum length of the rattle snake Cascabel is 65-100 cm and its colour varies between light-brown and grey-brown, the belly is broken white on its back it carries diamond shape figures. Its venom is not deadly.
    (Note by H + E Stöckl: We was informed by a reader that the Cascabel is one of the most venemous rattlesnkes. An interntes research confirmed this. That means, Roel Uckerman is mistaken in this matter).
    It seems the Cascabel is losening his territory to the Boa.
    The maximum length of the Santanero is 50-70 cm and it only eats insects.
    Aruba, scenery
    The final question is whether it is possible that the Arubian Boa constrictors are not released pets, but drawn from mainland Venezuela to Aruba by currents.
    It is possible, but not likely. Between Aruba and the peninsula Paraguana (that consists mainly out of sand and is 5 times bigger than Aruba) is a strong, 2 to 4 knots, westerly current. A distance of 20 km with such a current is hardly to overcome even by Boas who are good swimmers.
    However it is possible that they entered the waters from a more easterly place. Venezuela has many landslides due to heavy rainfall, maybe some of the Boas were drawn with it. This does not exclude setting free pet Boas.
    Aruba, coastal vie


    2楼2012-09-02 19:40
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      3楼2012-09-02 19:41
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        译文如下 无本人许可严禁转载
        红尾蚺--阿鲁巴岛上的入侵物种
        罗尔·乌科尔曼和他的妻子海瑟尔是荷兰裔,他们已经在阿鲁巴岛上居住了十年了。乌科尔曼先生在阿鲁巴海岸防卫队工作。
        阿鲁巴岛,隶属于荷属西印度群岛,位于委内瑞拉拉瓜纳半岛海岸线二十公里处。
        阿鲁巴岛面积大约190平方公里,长度31公里,最宽处9公里。它和它的邻岛库拉索岛以及东边的博内尔岛一起,从1936年起,开始由荷兰王国统治。
        据统计阿鲁巴岛上有75000人口,不包括非法移民和游客。
        您可能会问为什么我们会在这个网站上发表关于这个岛的文章。
        其原因就在于这个岛是第一个红尾蚺作为入侵物种个案的地方。
        入侵物种是被人为引入其他原本并不存在这一物种的生态系统的物种。
        一个物种被称为入侵物种要满足以下三个条件:1:直接或间接由人类引入2:引入的时间必须是在1492年以后(殖民活动开始和世界各国关系的形成时期)3:自我繁殖种群,即不需要人类帮助就能繁殖。
        红尾蚺并不是阿鲁巴岛上的原生蛇类。然而几乎每天都有超过两米的个体被抓到。2005年3月,在乌克尔曼家的院子里出现了一条6英尺长(1.8m)的红尾蚺。
        关于红尾蚺的来源,很可能是由那些不负责任的饲主随意野放导致的。红尾蚺的繁殖速度很快,同时因为它们很适应阿鲁巴岛的环境,它们很快就遍布岛上的各个地方,甚至人类城市。这样的现状和它们在当地没有天敌也有关系。
        这样的新来者在阿鲁巴岛上的蛇类种群中无疑是一场天灾。
        有些红尾蚺甚至在下水道中繁殖,岛上的居民认为如果被这些蛇咬到就会感染上下水道中的细菌。虽然到目前为止还没有什么严重感染的案例发生,但是毫无疑问在当地人眼中红尾蚺的存在毁掉了当地的自然生态。
        阿鲁巴岛上有两种原生蛇:阿鲁巴岛林蛇(Santanero)和阿鲁巴岛响尾蛇(Cascabel)。阿鲁巴岛响尾蛇是阿鲁巴岛本岛的特有种。这种蛇的最大长度为65-100厘米,颜色介于浅棕色和灰棕色之间,腹部白色,背部有菱斑。对于人类来说,它的毒液不足以致命。(工作人员注释:有读者告诉我们阿鲁巴岛响尾蛇是毒性最强的几种响尾蛇之一,网络上的一些数据也证明了这一点。这意味着罗尔·乌克尔曼先生犯了一个错误。)
        现在看来响尾蛇的领地被红尾蚺抢占了。
        阿鲁巴岛林蛇的最大长度是50-70厘米,而且它们只吃昆虫。
        最后的问题是阿鲁巴岛上现生的红尾蚺有没有可能不是人为释放的宠物而是从委内瑞拉本土顺洋流渡海到达岛上的。
        这看似可能,但是几率很小。在阿鲁巴岛和拉瓜纳半岛(主要是沙地,是阿鲁巴岛的五倍大)之间有一个强烈的,宽度在2到4海里的西向洋流。20公里宽的海域中间夹着这样的一个洋流,即便红尾蚺是再好的游泳健将也很难渡过去。【我个人认为可以通过采样分析岛上红尾蚺的基因库比对确定亲缘关系来分析,人工饲养的红尾蚺部分带有变异基因,而渡海而来的红尾蚺的基因会和委内瑞拉本土种群的基因比较接近--译注】然而如果红尾蚺从更东边一些的地方下水则成功的几率会大一些。由于充沛的降雨,委内瑞拉经常有山体滑坡发生,也许一些红尾蚺会由此进入海中并游泳登岛。这种情况也是可能发生的,同时也并不排除释放宠物蚺的可能。


        IP属地:北京4楼2012-10-17 20:45
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          图片1 阿鲁巴岛地图

          图片2 阿鲁巴岛景色

          图片3 阿鲁巴岛上的红尾蚺,照片拍摄于乌克尔曼家的院子。很遗憾不久之后这条蛇被他们的邻居所杀。
          


          IP属地:北京5楼2012-10-17 20:50
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            图片4 这张照片由荷兰旅行者J·贝佳德拍摄,感谢他的慷慨投稿。

            图片5 由图可见,红尾蚺在当地可以捕食一些体型很大的鸟类,如当地名称为“瓦拉瓦拉”的凤头卡拉鹰。

            图片6 如此大的一条红尾蚺爬上这样危险的高度捕食很令人惊奇。

            图片7 这就是红尾蚺菜单上的那个倒霉蛋。凤头卡拉鹰,拉丁名叫做Polyborus plancus这种被当做猎物的鸟分布在美国,南美洲以及阿鲁巴岛。它可以长到61厘米长(两英尺);最大翼展130厘米(4.2英尺)最大重量可以达到一点五公斤(3.3磅)。
            照片及信息来自维基百科

            图片8 阿鲁巴岛景色
            


            IP属地:北京6楼2012-10-17 21:08
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              网速问题有两张风景传不上来 大家可以去原网址查看
              end


              IP属地:北京7楼2012-10-17 21:09
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                假如我是岛上的居民,我觉得响尾蛇被红尾蚺取代并不是啥坏事,毕竟响尾蛇有毒


                IP属地:广东8楼2012-11-06 23:51
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                  9楼2012-11-25 11:46
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                    。。。我认为如果人类铁了心要消灭一个地区内的某种生物,除了微生物外很少有动物可以抵挡。


                    IP属地:安徽来自手机贴吧10楼2012-12-29 20:01
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                      好帖,好帖,我喜欢


                      来自手机贴吧11楼2013-06-26 11:44
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                        奇怪的是响尾蛇居然不攻击红尾蚺,毕竟红尾蚺对血液毒和神经毒都不不免疫。


                        来自手机贴吧12楼2013-10-03 11:33
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                          红尾蚺与黄金蟒,不知道谁输谁赢。都是好美的生物


                          IP属地:浙江来自手机贴吧13楼2014-06-01 13:18
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