为什么北方马口鱼比南方的大？
马口鱼是鲤科、马口鱼属小型淡水鱼类，别称山鳡、桃花板、麻口等，分布极为广泛，除青藏高原少数地区外全国各地均有分布，尤以丘陵地区的山涧溪流中最多见，下面来看一看为什么北方马口鱼比南方的大吧！https://www.de62.com/d/file/p/2022/11/24/8fe1c0947b4bff5299aaa5f7309f6c07.jpg一、鱼种定义马口鱼是名贵淡水鱼种，别称山鳡、桃花板、麻口等，在生物学分类上属于动物界、脊索动物门、硬骨鱼纲、鲤形目、鲤科、马口鱼属小型淡水鱼类，除青藏高原少数地区外全国各地均有分布，尤以丘陵地区的山涧溪流中最多见，常见个体在50克以内，最大个体可达100～150克。https://www.de62.com/d/file/p/2022/11/24/b4f5989f50afabe0be9306546b83a484.jpg二、原因论述北方马口鱼比南方大的主要原因是品种不同，马口鱼实际上是鲤科、马口鱼属小型淡水鱼类的统称，全世界约共有10种，代表品种有马口鱼(指名物种)、高屏马口鱼、粗首鱲、真马口鱼等，此外马口鱼还有很多亚种和变种，品种不同马口鱼不管是形态还是个体大小均有不同。https://www.de62.com/d/file/p/2022/11/24/115d48ec16f5df735cbc564c5f522db8.jpg三、分布范围马口鱼的分布极为广泛，我国除青藏高原少数地区外，南自海南岛、北到黑龙江、西达四川盆地、东临沿海地区江河中均有分布，尤以丘陵地区的山涧溪流中最常见，但近年来因过度捕猎和生态环境遭到破坏导致野生马口鱼已变得越来越稀缺，若不及时加以保护有灭绝的可能。https://www.de62.com/d/file/p/2022/11/24/0f493ce30634c7bc1e3b1298c39fabd0.jpg四、生活习性1、环境：马口鱼是溪流性鱼类，广泛分布于丘陵地区水温较低的山涧溪流中，喜在水草丰茂的水体中上层活动，对水质要求高，最适生长水温20～25℃，摄食临界水温0～32℃。2、食性：马口鱼是偏肉食的杂食性鱼类，主要以小型鱼类、甲壳类、水生昆虫及幼虫等动物性食物为食，在食物匮乏的季节也吃草籽、树籽、藻类、高等植物碎屑等植物性食物。3、繁殖：马口鱼是卵生鱼类，性成熟期比较短，1龄鱼可达到性成熟，产卵期6～9月，繁殖期雄鱼会显出艳丽的婚姻色以招引雌鱼，幼鱼孵化后在水草丛生的浅水区觅食、肥育。友情推荐：爱钓鱼(https://www.de62.com)是一个分享钓鱼技巧的网站，主要内容包括钓鱼常识、钓鱼技巧、钓鱼饵料、钓具选择、饵料配制等相关钓鱼知识。Measure resurface banish duds eyepiece.
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