鱼儿每天在耳朵里记日记随便一条鱼,如何确定它的年龄?根据它的大小判断?例如一岁大的金枪鱼与一岁大的鲸鱼是没法比的,因此根据鱼儿的身体大小很难估测它的年龄。告诉你两个巧妙又简单的办法:鱼儿的鱼鳞和耳石像树的年轮一样,有一圈一圈的轮线,数一数这些年轮,就可以确定鱼儿的年龄了。更绝的是,在显微镜下观察,鱼儿的耳石每一天都会有一条标记,好像鱼儿每天都要在耳石上留下记录一样。耳石是鱼类内耳的白色结晶状物质,由蛋白质和碳酸钙组成,具有听觉和平衡身体的功能。不同的鱼,耳石的大小、形状都不同。一般情况下,经常在暗礁和多岩石的海域穿梭的鱼儿,例如豉鱼,耳石较大。在宽阔的海域直线游走的鱼儿,例如金枪鱼,耳石就小。飞鱼的耳石异乎寻常的大,这可能与鱼儿平衡身体的需 How to determine its age? According to its size to judge? For example, a year-old tuna fish and one-year-old whale is unmatched, so according to the fish’s body size is very Hard to measure its age. Tell you two clever and simple ways: the fish’s scales and otoliths, like the tree’s rings, have a circle of wheels, count the number of these annual rings, you can determine the age of the fish. Even more insidiously, under the microscope, the fish’s otoliths have a mark every day, as if the fish had a record on the otolith every day. Otolith is a white crystalline substance in the inner ear of fish, composed of protein and calcium carbonate, which has the function of hearing and balancing the body. Different fish, otolith size, shape is different. Under normal circumstances, often in the reef and rocky waters shuttle fish, such as anchovy, otolith larger. Fish swimming in a wide sea area, such as tuna, have small otoliths. The otoliths of exotic fish are unusually large, which may be necessary to balance the body with the fish