雪蟹白菜上面有黑点怎么会有黑点

水产品HACCP计划-雪蟹_百度文库
两大类热门资源免费畅读
续费一年阅读会员,立省24元!
水产品HACCP计划-雪蟹
上传于||暂无简介
阅读已结束,如果下载本文需要使用0下载券
想免费下载更多文档?
定制HR最喜欢的简历
下载文档到电脑,查找使用更方便
还剩20页未读,继续阅读
定制HR最喜欢的简历
你可能喜欢求教:关于帝王蟹和雪蟹的生存竞争_螃蟹吧_百度贴吧
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&签到排名:今日本吧第个签到,本吧因你更精彩,明天继续来努力!
本吧签到人数:0可签7级以上的吧50个
本月漏签0次!成为超级会员,赠送8张补签卡连续签到:天&&累计签到:天超级会员单次开通12个月以上,赠送连续签到卡3张
关注:13,715贴子:
求教:关于帝王蟹和雪蟹的生存竞争
看了一个关于的视频(大家可能都看过)。讲述作为对挪威外海的生物入侵。科学家研究认为,帝王蟹的广泛食性、超强的适应能力以及庞大的身躯使得当地的和蟹类大面积灭绝。有一个长镜头里面是铺满和甲壳动物躯壳的海底,解说是帝王蟹造成的。一般而言,外来生物在他的原栖息地是无害的,当地的生物链很好的适应着彼此。我很好奇,求教一下,在阿拉斯加的深海里面,这种跟形态相似、食性相似、体型却小许多的蟹类,是如何与帝王蟹这种严格意义上就不是螃蟹的表亲,进行生存竞争,并很好繁衍的呢?
在职研究生报名入口,在职研究生名校报名
拟石蟹物种入侵是存在的,但受打击的应该不是吧?在两者不是一直并存的嘛?
感谢楼上的回复,我知道这个讨论颇为另类。物种的生存竞争其实更多的不是在捕食与被捕食者之间进行的,狼和羊其实有一种共生的联系;可以打破平衡使一方失衡,但最终新的平衡会产生。亦如病毒专家所说的“流行病最终会成为。”。但是,相近物种的竞争才是重要的,比如不同种类的羊之间。另一个就是生物学上的趋同,如前所述和是不同的物种。但趋同的外形和相近的食性间,一定有他们和谐共处的基础,这是肯定的,也是我想知道的。
楼上是那个记录片的截图,我无意中发现的一闪而过的线索。一只帝王蟹,右螯还是再生的,后面有一对螯,很明显是海蟹类的。虽然,挪威外海没有雪蟹,但看形状(视频后面还有几秒)应该是雪蟹类同的蜘蛛蟹科。想来他们之间是可以和谐共处的。
我胡乱的猜测一下。同样是生活在相同区域的歪尾下目与短尾下目,类似于帝王蟹与雪蟹。椰子蟹与红蟹就一起生存在圣诞岛,而寄居蟹与招潮蟹也一起生存在滩涂。也是后者数量更大而身材更小。和谐的原因,我瞎猜,虽然同是杂食,后者更不挑剔。比如,红蟹可以吃落叶充饥,而招潮蟹会过滤沙土。是不是深海中也有类似的现象的,可惜人类更关注美味,而不是科学
发几张图,祝大家胃口好
生态位相同就会有种间竞争,足够的时间,没有其它物种干扰下,优势物种就会替代其它同生态位的物种
另外,虽然相像。但如雪蟹这类蜘蛛蟹类的动物,运动系统很好,既可以想螃蟹那样横行,也可以如龙虾般前行,关键是爬得挺快。而王蟹运动起来,一拐一拐的。似乎没有了寄居贝壳后头重脚轻,不是很快捷灵敏。
看了篇花豹与云豹的种间竞争的文章,很受启发
覆盖全国38个城市的服务网点,维修透明看得见!
通过这个描述来看,帝王蟹和雪蟹一定会有很强的种间竞争。
这帖的话题挺有意思,楼主是属于兴趣还是半专业的呢?感觉挺在理的
点亮12星座印记,
Snow crabs have found niche in Barents Sea ecosystem被发现巴伦支海的雪蟹 Since the first five specimens of snow crab were found in the Barents Sea in 1996, the population has exploded. There is now ten times as much snow crab than king crab in the area, and scientists are just starting to find out how this new species has adopted to life in the Barents Sea.1996年在巴伦支海发现五只雪蟹,现在数量爆增。现在雪蟹已经是同区域王蟹数量的十倍。科学家正试图发现这些新物种是如何适应生存于巴伦支海域。Norwegian and Russian scientists have been monitoring the population of snow crab in the Barents Sea since 2004. They have found that the snow crab is no competitor to the king crab. “It seems like the snow crab has occupied a niche in the ecosystem where there probably used to be several different species, “says Jan Henry Sundet, Senior Researcher at the Institute of Marine Research.挪威和俄国的科学家从2004年就持续监控雪蟹在巴伦支海域的数量。他们发现雪蟹和王蟹不是竞争对手。“这似乎显示了在几种物种存在的生态系统中已经占据了自己的生态位。”海洋研究所高级研究员Jan Henry Sundet表述。During the latest resource mission to the Barents Sea in , the scientists found large amounts of young crabs, which implies that the recruitment to the population is very good.最近于年的资源调查中,科学家发现大量的幼蟹,这显示其种群繁衍良好。Uncertain origin未知的来源The first crabs in the Barents Sea were found on the Goose Bank west of Novaya Zemlya in 1996. The scientists are not sure where the crabs come from – they can have migrated here naturally, or they can have been brought here in ballast water.最初在巴伦支海的雪蟹于1996年被发现在新地岛的古斯西岸。科学家并不确定它们出现的原因,它们可能是自然迁徙到这里,也可能是通过压舱水携带而来。The original native areas for the snow crab are the Bering Strait and the coasts of easternCanadaand western Greenland. Russian scientists have found crabs in the Chukchi Sea, Eastern Siberian Sea, Laptev Sea and Kara Sea.雪蟹的自然栖息地在白令海峡和加拿大东岸与格陵兰西岸。俄国科学家发现在俄境内的楚克其海、东西伯利亚海、拉普贴夫海和科拉海。Scientists have compared DNA from the snow crab in the Barents Sea with snow crabs fromCanadaand Greenland and concluded that they do not come from that area. There has not yet been made any comparison between crabs from the Barents Sea and the Bering Strait, but the scientist says it’s “probable, but not certain,” that they come from there.科学家通过DNA比对巴伦支海与加拿大和格陵兰岛雪蟹,结果显示不来自上述地区。目前还没有结论关于巴伦支海的雪蟹与白令海峡的物种有关。但科学家认为“可能,但不确定”它们来自那里。“The snow crab shows a classical development of an alien, invasive species”, Sundet says. “After the first specimens have been found, you have a long period where very little is happening and then you get an explosion in the population”. In the Barents Sea the explosion in the population came in 2012.“雪蟹是典型的生物入侵” Sundet表示,“被发现后很长时段只是少量发现,但现在数量已经爆增”。巴伦支海域的雪蟹暴增在2012年。Occupying a new niche in the ecosystem占领生态系统中的新生态位The growth in the population of snow crab is enormous and will probably be an important part of the ecosystem in the Barents Sea. “Based on the experience we have form the king crab, we know that the snow crab can have a large impact on the bottom fauna. We hope to get more research on this field during this year’s missions”, Sundet says.雪蟹的暴增对巴伦支海域生态是重大的,而且可能是决定性的影响。Sundet表示,“基于王蟹入侵的经验,我们认为雪蟹肯定对底栖生物产生巨大的冲击。我们希望基于今年的该地区的资料进一步研究”。The snow crab is a much more Arctic species than the king crab. They prefer much colder waters and have not spread to the southern parts of the Barents Sea where the king crabs have settled. 雪蟹比王蟹更适应北极区域。它们喜欢选择更冷的区域,而没有扩展到王蟹生存的南部巴伦支海域。The scientists have found that the crabs have a very varied diet – they eat clams, worms and other smaller animals and plants found on the sea bottom. Another thing the snow crab seems to been craving is garbage. In 20 percent of the examined crabs the scientists found plastic. “This tells something about the enormous problem littering of the oceans is”.科学家发现雪蟹食物广泛:包括蚌、蠕虫和其它海底能发现的小型动物及植物。另显示雪蟹更喜欢吃垃圾,20%被观察到雪蟹,科学家都发现了塑料。“这显示海洋已经是巨大的垃圾场”。The scientists have also found that the snow crab does not compete about food with fish in the same way as the king crab does. The king crab also feeds on capelin roe and lumpfish roe, something the snow crab does not seem to be doing. “On the contrary, the snow crab is actually food for cod”, Sundet says.科学家已经发现雪蟹不象王蟹那样与当地的鱼类竞争食物。王蟹吃鱼卵,但雪蟹不这样。“相反它们是鳕鱼的食物” Sundet说。Huge commercial potential巨大的商业潜能The snow crab poses a hug commercial potential, which Norway and Russia are just about to start exploring.挪威和俄国正在调查雪蟹带来的巨大的商业潜能。“We who live by the Barents Sea are very lucky that the alien, invasive species that have settled here are of the valuable sort”, says Konstantin Sokolov of the Russian research institute PINRO. “Other places, like for example the Black Sea, have had invasions of species like jellyfish”.
“And if we see that the population of crabs becomes too large, we have the possibility to increase fishing to bring it down,” Sokolov says.俄国PINRO研究所的K.S.表示:“作为巴伦支海域的人,我们非常幸运看到这种贵重物种的异种入侵。”“比较另一些地方,如黑海,外来物种入侵的是水母”“如果雪蟹的数量过于庞大,我们可以通过捕捞而减少它们的数量”。There is already a market for snow crab in the world. Both inCanadaand Alaska the snow crab is regarded as a valuable resource.Canadalast year caught more than 100,000 tons of crab.雪蟹有全球市场,加拿大和阿拉斯加视其为重要的资源。去年加拿大就捕获了超过十万吨。The snow crab is such a new species that no regulations of commercial fishing have yet been established, neither in Russian nor in Norwegian waters. In 2013 a few vessels started fishing snow crab in the international waters of the Barents Sea. The Norwegian vessel “Arctic Wolf” caught 60 tons of crab during two trips in April 2012, Kystog Fjord reported.According to Konstantin Sokolov,Russiaplans to open up for snow crab fishing in Russian Economic Zone in 2014.雪蟹作为新物种,在俄国和挪威水域还没有商业捕捞配额。2013年少数渔船在巴伦支公海捕捞雪蟹。K.F.报道,挪威渔船北极狼号在13年四月两次捕捞大约60吨雪蟹。俄国也计划在14年放开雪蟹的捕捞区。
原文地址及配图
挪威海域被王蟹入侵后,又被雪蟹入侵。幸抑或不幸?
通过这个资料显示,雪蟹和王蟹虽然形态相似又栖息环境重叠,但彼此并不在一个生态位上,种间竞争不是十分激烈。 好了,这个话题我也算是功德圆满了。 ==========================================================吧主可以锁帖了
贴吧热议榜
使用签名档&&
保存至快速回贴时不知道还吃得挺多,也没任何问题,跟体质有关系
您的举报已经提交成功,我们将尽快处理,谢谢!
不会有事的,只要蟹肉是熟的就不用担心,孕期不让吃螃蟹是因为螃蟹属于寒性食物,吃多了会导致子宫过寒引起流产,但前提是吃多的情况下,偶尔少量吃一点不会有影响的,我在...
商场顶层那种大食代超难吃。金宝街有利苑,茶点老火汤都好。翠花胡同悦宾饭馆北方家常菜实惠窝心。金宝汇大董新派创意料理,味道好摆盘美量小。胜博殿炸猪排平均水平但白玉...
钓鱼台的比较便宜,泡菜味的。巨人西餐厅拐角处有卖寿司的店,第一大道有寿司店……赣南教育学院西门口下午有小吃摊,味道也不错,就是难消化,比较硬
隔夜寿司只要未变质还是可以吃的,也不会影响多大口感,但毕竟没有刚做出来的新鲜。
我最近也很爱吃KFC 的炸鸡,在孕前这种东西我是根本不屑一顾的,但是怀孕了 就口味变了 就是好多书中所说的异食症,各种书上对于异食症的看法,只要所想吃的东西不是...
大家还关注

我要回帖

更多关于 阴囊上面有小黑点 的文章

 

随机推荐