Science

植物&动物 | 生态&环境 | 大脑&行为 | 健康 | 技术 | 科学&政策 | 进化 | 古生物学 | 细胞 | 分子 | 基因&蛋白 | 遗传&发育 | 生物化学 | 生物物理 | 免疫 | 人物&事件 | 微生物学 |
当前位置: Science » 植物&动物 » Science:金枪鱼急转弯的秘密

Science:金枪鱼急转弯的秘密

摘要 : 蓝鳍金枪鱼体长可伸展至3米,重达1吨,在水中潜行时速可达60公里。由于其淋巴系统的作用,它们在捕猎时可在极小的空间中急转弯。

u=459382193,1513691923&fm=26&gp=0

蓝鳍金枪鱼体长可伸展至3米,重达1吨,在水中潜行时速可达60公里。由于其淋巴系统的作用,它们在捕猎时可在极小的空间中急转弯。研究人员在7月20日发表于《科学》的报告中称,与人类用淋巴系统制作及运输白血细胞不同,蓝鳍金枪鱼用该系统让两个鳍移动。

当科学家解剖这种动作敏捷的鱼类之后,他们在其背腹部下第二个鳍的根基处发现了空的腔体。这些维管组织与延伸到鱼鳍的血管网络相连,位于构成鱼鳍辐肋的骨骼之间。该团队在近日死去的金枪鱼维管组织中泵入盐水溶液,发现溶液流入维管束通道,增加了鱼鳍的内部压力。这使得鱼鳍上划并直立在身体上。

该团队发现,当蓝旗金枪鱼在进行一系列急转弯时,它们鱼鳍的位置就会发生类似的变化。研究人员推测,鱼鳍的动作在金枪鱼急转弯时可提供额外的稳定性,为此,它们将不需要因为平衡而牺牲速度。

原文链接:

Watch the secret to a tuna’s sharp turns

原文摘要:

Bluefin tuna can stretch 3 meters, weigh a metric ton, and reach speeds of 60 kilometers per hour. Yet they still turn on a dime when hunting, thanks in part to their lymphatic systems. Unlike humans, who use their lymphatic systems to produce and transport white blood cells, tuna use theirs to move two of their fins, researchers report today in Science. When scientists dissected the nimble fish, they discovered empty cavities at the base of their second dorsal and under-belly fins. These vascular sinuses are connected to a network of vessels that extend into the fin, between the bones that make up the fins’ rays. When the team pumped a saline solution into the vascular sinuses of recently deceased tuna, the solution flowed into the vascular channels and increased the fins’ internal pressure. This caused the fins to rise and stand erect from the body. The fish make such changes in their fin position when they make a series of sharp turns, especially during hunting, the team found. The researchers suspect that this fin movement offers extra stability during tuna’s tight maneuvers so the fish don’t have to sacrifice their speed for balance.

来源: Science 浏览次数:0

我们欢迎生命科学领域研究成果、行业信息、翻译原创、实验技术、采访约稿。-->投稿

RSS订阅 | 生物帮 | 粤ICP备11050685号-3 ©2011-2014 生物帮 Science  All rights reserved.