anadromous

简明释义

英[əˈnædrəməs]美[əˈnædrəməs]

adj. 溯河产卵的

英英释义

单词用法

同义词

反义词

例句

1.Salmon spawn in fresh water, but in many cases, the fish spend most of their lives at sea, returning to the rivers only to reproduce. This lifecycle is described as anadromous.

虽然作为淡水鱼类，三文鱼大部分时间都生活在海洋里，它们只在产卵期间回到淡水中，这种生活习性被称为溯河产卵。

2.The anadromous variety of rainbow trout, being larger and having darker spots than the freshwater variety.

彩虹鳟中的溯河产卵海鱼，较淡水种类体型大，斑点颜色淡。

3.Any of various freshwater or anadromous food and game fishes of the family Salmonidae, especially of the genera Salmo and Salvelinus, usually having a streamlined, speckled.

鳟鲑鱼科的各种淡水或溯河性食用及捕钓鱼，尤指鲑鱼属和红点鲑属，通常。

4.Any of various primitive elongated freshwater or anadromous fishes of the family Petromyzontidae, characteristically having a jawless sucking mouth with rasping teeth.

七鳃鳗，八目鳗一种七鳃鳗科的原始细长淡水或溯河产卵鱼，特点是长有无。

5.Salmon spawn in fresh water, but in many cases, the fish spend most of their lives at sea, returning to the rivers only to reproduce. This lifecycle is described as anadromous.

虽然作为淡水鱼类，三文鱼大部分时间都生活在海洋里，它们只在产卵期间回到淡水中，这种生活习性被称为溯河产卵。

6.Researchers study anadromous 洄游性 species to understand their migration patterns and environmental impacts.

研究人员研究洄游性物种，以了解它们的迁徙模式和环境影响。

7.Many species of fish are anadromous 洄游性, requiring access to both saltwater and freshwater habitats.

许多鱼类是洄游性的，需要同时进入咸水和淡水栖息地。

8.The anadromous 洄游性 salmon migrates from the ocean to freshwater rivers to spawn.

这种洄游性的鲑鱼从海洋迁移到淡水河流中产卵。

9.The anadromous 洄游性 behavior of eels is less understood compared to salmon.

与鲑鱼相比，鳗鱼的洄游性行为尚未得到充分理解。

10.The life cycle of anadromous 洄游性 fish is fascinating, as they travel long distances to reproduce.

这种洄游性鱼类的生命周期非常迷人，因为它们为了繁殖而长途跋涉。

作文

The fascinating world of fish migration has always intrigued scientists and nature enthusiasts alike. Among the various types of fish, those that are classified as anadromous (洄游鱼类) stand out due to their unique life cycle. These fish, such as salmon and striped bass, are born in freshwater rivers, migrate to the ocean for most of their lives, and return to their natal rivers to spawn. This remarkable journey not only showcases the resilience and adaptability of these species but also highlights the intricate relationship between aquatic ecosystems and their environments.The life of an anadromous (洄游鱼类) fish begins in freshwater. The eggs are laid in gravel beds in clean, flowing rivers, providing a safe haven for the developing embryos. As they hatch, the young fish, known as fry, begin their journey downstream. This initial phase is crucial for their survival as they face numerous predators and environmental challenges. Once they reach the ocean, they undergo significant physiological changes that enable them to thrive in saltwater. This adaptability is a key characteristic of anadromous (洄游鱼类) species, allowing them to exploit different habitats during their life cycle.After spending several years in the ocean, anadromous (洄游鱼类) fish instinctively return to their birthplace to reproduce. This migration is often triggered by changes in water temperature, daylight, and other environmental cues. The journey back to freshwater can be perilous, as these fish must navigate through various obstacles such as dams, predators, and changing water conditions. Despite these challenges, their strong homing instincts guide them back to the exact location where they were born.The return to freshwater is not just a physical journey; it is also a time of transformation for anadromous (洄游鱼类) fish. They undergo significant changes in their bodies, including alterations in coloration and size, as they prepare for spawning. This process is energetically demanding, and many fish do not survive after spawning. However, their sacrifice ensures the continuation of their species, as the next generation of fry will carry on the legacy of their ancestors.The ecological significance of anadromous (洄游鱼类) fish cannot be overstated. They play a crucial role in nutrient cycling within both freshwater and marine ecosystems. When they return to rivers to spawn, their decaying bodies provide essential nutrients for the surrounding environment, supporting a diverse array of wildlife. Additionally, these fish serve as a food source for various predators, including birds, mammals, and other fish.Unfortunately, human activities have greatly impacted the populations of anadromous (洄游鱼类) fish. Dams and water pollution have disrupted their migratory patterns, while overfishing has led to declining numbers. Conservation efforts are critical to restoring healthy populations of these fish and ensuring the sustainability of their habitats. By protecting the rivers and oceans they inhabit, we can help maintain the delicate balance of our ecosystems and preserve the incredible life cycle of anadromous (洄游鱼类) fish.In conclusion, the study of anadromous (洄游鱼类) fish provides valuable insights into the complexities of migration, adaptation, and ecological interdependence. Their remarkable life cycle serves as a reminder of the interconnectedness of all living organisms and the importance of preserving our natural environments. Understanding and protecting these unique species is essential for maintaining the health of our planet's ecosystems for future generations.

鱼类迁徙的迷人世界一直吸引着科学家和自然爱好者。在各种鱼类中，被归类为洄游鱼类的鱼因其独特的生命周期而脱颖而出。这些鱼，如鲑鱼和条纹鲈鱼，出生在淡水河流中，生活的大部分时间迁移到海洋，然后返回出生地的河流产卵。这段非凡的旅程不仅展示了这些物种的韧性和适应能力，还突显了水生生态系统与环境之间的复杂关系。洄游鱼类的生活始于淡水。卵子在清澈流动的河流中的砾石床上产下，为发育中的胚胎提供了安全的栖息地。当它们孵化时，幼鱼被称为幼鱼，开始向下游的旅程。这一初始阶段对它们的生存至关重要，因为它们面临着众多捕食者和环境挑战。一旦它们到达海洋，就会经历重大的生理变化，使它们能够在盐水中茁壮成长。这种适应能力是洄游鱼类物种的一个关键特征，使它们在生命周期中能够利用不同的栖息地。在海洋中生活了几年后，洄游鱼类鱼类本能地返回出生地繁殖。这种迁徙通常由水温、日照和其他环境线索的变化触发。返回淡水的旅程可能是危险的，因为这些鱼必须穿越各种障碍，如水坝、捕食者和变化的水文条件。尽管面临这些挑战，它们强烈的归巢本能引导它们回到出生的确切位置。返回淡水不仅是一次身体的旅程；对于洄游鱼类鱼来说，这也是一个转变的时刻。它们的身体经历了显著的变化，包括颜色和体型的变化，以准备产卵。这个过程需要大量的能量，许多鱼在产卵后无法存活。然而，它们的牺牲确保了物种的延续，因为下一代幼鱼将承载着祖先的遗产。洄游鱼类鱼的生态重要性不容小觑。它们在淡水和海洋生态系统中的营养循环中发挥着至关重要的作用。当它们返回河流产卵时，它们腐烂的身体为周围环境提供了必需的营养，支持着多样化的野生动物。此外，这些鱼还为各种捕食者提供了食物来源，包括鸟类、哺乳动物和其他鱼类。不幸的是，人类活动对洄游鱼类鱼的种群产生了重大影响。水坝和水污染干扰了它们的迁徙模式，而过度捕捞导致数量下降。保护工作对于恢复这些鱼的健康种群和确保其栖息地的可持续性至关重要。通过保护它们栖息的河流和海洋，我们可以帮助维持生态系统的微妙平衡，并保护洄游鱼类鱼令人难以置信的生命周期。总之，研究洄游鱼类鱼为我们提供了对迁徙、适应和生态相互依赖复杂性的宝贵见解。它们非凡的生命周期提醒我们所有生物之间的相互联系以及保护自然环境的重要性。理解和保护这些独特的物种对于维护我们星球生态系统的健康至关重要，为未来几代人保留。