格陵兰岛鲨鱼是一种主要捕食鱼类的顶级捕食者。但是,实际上从未观察到狩猎。清除报告很常见。鲨鱼用驯鹿,驼鹿,马,北极熊和海豹补充其饮食。虽然鲨鱼以海豹为食,但研究人员尚不清楚它是如何捕杀它们的。因为它生活在寒冷的水中,格陵兰鲨鱼的新陈代谢率极低。事实上,它的代谢率非常低,以至于物种的游泳速度与任何鱼类的游泳速度相比都是最低的,所以它不能游得足够快以捕捉海豹。科学家们假设鲨鱼在睡觉时可能会抓住海豹。代谢率低也导致动物生长缓慢和长寿。因为鲨鱼有软骨骷髅而不是骨头,所以约会他们的年龄需要一种特殊的技术。在2016年的一项研究中,科学家对被捕获的鲨鱼眼睛的晶体中的晶体进行了放射性碳年代测定。该研究中最老的动物估计为392岁,正负120年。从这些数据来看,格陵兰鲨鱼的生存期至少有300到500年,使它们成为世界上寿命最长的脊椎动物。格陵兰鲨鱼的生物化学适应了鱼类在极冷的温度和高压下生存。鲨鱼的血液含有三种类型的血红蛋白,使鱼在一定压力范围内获得氧气。据说鲨鱼闻起来像尿液,因为它们的组织中含有大量的尿素和三甲胺N-氧化物(TMAO)。这些含氮化合物是废物,但鲨鱼使用它们来增加浮力和维持体内平衡。大多数格陵兰鲨鱼是盲人,但不是因为他们的眼睛很小。相反,眼睛被桡足类定植,遮挡了鱼的视野。鲨鱼和桡足类可能具有共生关系,甲壳类动物显示出生物发光,吸引猎物吃鲨鱼。关于格陵兰鲨鱼繁殖的知之甚少。雌性是卵胎生的,每窝产下约10只幼仔。新生幼崽的长度为38至42厘米(15至17英寸)。根据动物的缓慢增长率,科学家估计鲨鱼达到性成熟需要150年左右的时间。格陵兰鲨鱼肉中高浓度的TMAO使其肉质有毒。 TMAO被代谢成三甲胺,引起潜在的危险中毒。然而,鲨鱼的肉被认为是冰岛的美味佳肴。通过干燥,反复煮沸或发酵将肉去毒。

美国芝加哥大学生物学Essay代写:格林兰鲨鱼

Greenland sharks are a top predator for predatory fish. However, hunting has never been observed. Clearing reports is common. Sharks replenish their diet with reindeer, moose, horses, polar bears and seals. Although sharks feed on seals, researchers are still unclear how it kills them. Because it lives in cold water, the metabolic rate of Greenland sharks is extremely low. In fact, its metabolic rate is so low that the swimming speed of the species is the lowest compared to the swimming speed of any fish, so it cannot swim fast enough to capture seals. Scientists assume that sharks may catch seals while they sleep. Low metabolic rates also cause slow and longevity in animals. Because sharks have cartilage defects rather than bones, dating their age requires a special technique. In a 2016 study, scientists performed radiocarbon dating on crystals in the crystals of captured shark eyes. The oldest animal in the study is estimated to be 392 years old, plus or minus 120 years. From these data, Greenland sharks have a life span of at least 300 to 500 years, making them the longest-lived vertebrates in the world. The biochemistry of Greenland sharks adapts to the survival of fish at extremely cold temperatures and high pressures. The shark’s blood contains three types of hemoglobin that allow the fish to obtain oxygen within a certain pressure range. Sharks are said to smell like urine because their tissues contain large amounts of urea and trimethylamine N-oxide (TMAO). These nitrogenous compounds are wastes, but sharks use them to increase buoyancy and maintain homeostasis. Most Greenland sharks are blind, but not because their eyes are small. Instead, the eyes are colonized by copepods, obscuring the fish’s field of vision. Sharks and copepods may have a symbiotic relationship, and crustaceans show bioluminescence, attracting prey to eat sharks. Little is known about the breeding of sharks in Greenland. Females are born of ovum, and about 10 pups are laid in each litter. Newborn pups are 38 to 42 cm (15 to 17 inches) long. Based on the slow growth rate of animals, scientists estimate that it takes about 150 years for sharks to reach sexual maturity. The high concentration of TMAO in Greenland shark meat makes it toxic. TMAO is metabolized to trimethylamine, causing potentially dangerous poisoning. However, shark meat is considered a delicious dish of Iceland. The meat is detoxified by drying, repeated boiling or fermentation.

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