glochidium

简明释义

英[ɡləʊˈkɪdɪəm]美[ɡloˈkɪdiəm]

n. 河蚌幼体，瓣钩幼虫；（水蕨类植物上的）钩毛

复 数 g l o c h i d i a

英英释义

单词用法

同义词

反义词

例句

1.The life cycle of freshwater mussels begins with the release of larvae known as glochidium, which must attach to a host fish.

淡水贻贝的生命周期始于释放一种被称为幼虫的幼虫，这些幼虫必须附着在宿主鱼上。

2.Researchers studied how different species of fish react to the presence of glochidia in their environment.

研究人员研究了不同鱼类如何对其环境中存在的幼虫作出反应。

3.The survival rate of glochidia is heavily influenced by water quality and temperature.

水质和温度对幼虫的生存率有很大影响。

4.Some species of mussels can produce millions of glochidia in a single spawning event.

某些种类的贻贝在一次产卵事件中可以产生数百万个幼虫。

5.Fish that are hosts for glochidia often show signs of irritation when they attach to their gills.

作为幼虫宿主的鱼类在它们附着在鳃上时常常表现出刺激的迹象。

作文

The world of biology is filled with fascinating terms that describe the intricate relationships between organisms and their environments. One such term is glochidium, which refers to the larval stage of certain freshwater mussels. Understanding this unique life stage is crucial for appreciating the ecological roles that these mollusks play in aquatic ecosystems. In this essay, I will explore the characteristics of glochidium and its significance in the life cycle of freshwater mussels. Freshwater mussels are remarkable creatures that can be found in rivers and lakes around the world. They have a complex life cycle that includes several stages, one of which is the glochidium. The term glochidium originates from the Greek word 'glochis,' meaning 'little hook,' which aptly describes the tiny, hook-shaped larvae. These larvae are released into the water by adult female mussels and are typically very small, measuring only about 0.2 to 0.5 mm in length. What makes glochidium particularly interesting is its unique method of survival. Once released, these larvae must find a suitable host fish to attach themselves to in order to complete their development. This parasitic phase is essential for their growth, as they rely on the fish's oxygen and nutrients. The glochidium attaches itself to the gills or fins of the host fish using its specialized hooks, which allow it to remain securely anchored while it undergoes transformation into a juvenile mussel. The relationship between glochidium and its host fish is a fascinating example of co-evolution. Many species of freshwater mussels have evolved specific adaptations to attract particular fish species. For instance, some mussels have developed lures that mimic prey items to entice fish to come closer. When a fish bites at the lure, the glochidium is released and attaches itself to the fish. This intricate dance of attraction and attachment highlights the complexity of ecological interactions within freshwater habitats. After a few weeks to months, depending on the species and environmental conditions, the glochidium undergoes metamorphosis and transforms into a juvenile mussel. At this point, it detaches from the fish and falls to the riverbed, where it will continue to grow and develop into an adult mussel. This process is vital for the mussel population, as successful attachment and metamorphosis significantly impact the species' survival and reproduction. Unfortunately, many freshwater mussel species are currently facing threats due to habitat loss, pollution, and invasive species. The decline of host fish populations can also have a direct impact on glochidium survival, leading to decreased mussel populations. Conservation efforts aimed at protecting both mussels and their host fish are essential for maintaining healthy aquatic ecosystems. In conclusion, the term glochidium represents more than just a stage in the life cycle of freshwater mussels; it embodies the intricate connections between species and their environments. By understanding the role of glochidium in the life cycle of mussels, we can better appreciate the delicate balance of aquatic ecosystems and the importance of conservation efforts. Protecting these unique organisms and their habitats is crucial for ensuring the health and diversity of our planet's freshwater resources.

生物学的世界充满了迷人的术语，这些术语描述了生物体与其环境之间复杂的关系。其中一个术语是glochidium，指的是某些淡水贻贝的幼虫阶段。理解这一独特的生命阶段对于欣赏这些软体动物在水生生态系统中所扮演的生态角色至关重要。在这篇文章中，我将探讨glochidium的特征及其在淡水贻贝生命周期中的重要性。 淡水贻贝是生活在世界各地河流和湖泊中的非凡生物。它们的生命周期复杂，包括多个阶段，其中之一就是glochidium。glochidium一词源自希腊语“glochis”，意思是“小钩子”，恰如其分地描述了这种微小的、钩状的幼虫。这些幼虫由成年雌性贻贝释放到水中，通常非常小，长度仅约0.2到0.5毫米。 glochidium特别有趣之处在于其独特的生存方式。一旦释放，这些幼虫必须找到合适的宿主鱼附着，以便完成发育。这一寄生阶段对其生长至关重要，因为它们依赖于鱼的氧气和营养。glochidium使用其专门的钩子附着在宿主鱼的鳃或鳍上，这使其能够安全地固定在鱼身上，同时经历转变为幼年贻贝的过程。 glochidium与其宿主鱼之间的关系是共同进化的迷人例子。许多淡水贻贝物种已经进化出特定的适应性，以吸引特定的鱼类。例如，一些贻贝发展出模仿猎物的诱饵，以吸引鱼靠近。当鱼咬住诱饵时，glochidium被释放并附着到鱼身上。这种吸引和附着的复杂舞蹈突显了淡水栖息地内生态互动的复杂性。 在几周到几个月后，具体时间取决于物种和环境条件，glochidium经历变态，转变为幼年贻贝。此时，它会从鱼身上脱落，落到河床上，在那里继续生长并发育成成年贻贝。这个过程对贻贝种群至关重要，因为成功的附着和变态显著影响物种的生存和繁殖。 不幸的是，许多淡水贻贝物种目前正面临由于栖息地丧失、污染和入侵物种等威胁。宿主鱼种群的下降也可能对glochidium的生存产生直接影响，导致贻贝种群减少。旨在保护贻贝及其宿主鱼的保护工作对维护健康的水生生态系统至关重要。 总之，glochidium一词不仅代表了淡水贻贝生命周期中的一个阶段；它体现了物种与其环境之间复杂的联系。通过理解glochidium在贻贝生命周期中的作用，我们可以更好地欣赏水生生态系统的微妙平衡和保护工作的必要性。保护这些独特生物及其栖息地对于确保我们星球淡水资源的健康和多样性至关重要。