pleopod

简明释义

英[ˈpliːə(ʊ)pɒd]美[ˈpliəˌpɑd]

n. （甲壳动物的）[无脊椎] 腹肢；游泳足

英英释义

单词用法

同义词

反义词

例句

1.The tegument and exoskeleton structure and the cement glands activities of female pleopod in different physiological stages of Eriocheir sinensis were investigated by histological method.

用显微及亚显微方法研究了中华绒螯蟹雌体不同生理阶段（幼蟹、未成熟蟹、成熟蟹、抱卵蟹和流产蟹）腹肢的体壁结构变化和粘液腺发育特征。

2.After hatching, juveniles (juvenile stage 1 and 2) are also attached to mother's pleopod by means of their curved pereiopods for 6 weeks.

孵化后，少年(少年阶段1和2)也重视母亲的腹足了6个星期的手段胸足的弯曲。

3.The exoskeleton structure of female pleopod in Macrobrachium rosenbergii was primarily investigated by histological method.

用组织学方法初步研究了罗氏沼虾雌体腹肢外骨骼的结构。

4.The tegument and exoskeleton structure and the cement glands activities of female pleopod in different physiological stages of Eriocheir sinensis were investigated by histological method.

用显微及亚显微方法研究了中华绒螯蟹雌体不同生理阶段（幼蟹、未成熟蟹、成熟蟹、抱卵蟹和流产蟹）腹肢的体壁结构变化和粘液腺发育特征。

5.Some species of lobsters have unique adaptations in their pleopod that help them survive in harsh environments.

一些龙虾种类的腹足具有独特的适应性，帮助它们在恶劣环境中生存。

6.During mating season, the male crab displays its pleopod to attract females.

在交配季节，雄性螃蟹展示它的腹足以吸引雌性。

7.The shrimp uses its pleopod to swim efficiently through the water.

虾子利用它的腹足在水中高效游泳。

8.Scientists study the pleopod structure of various crustaceans to understand their locomotion.

科学家研究各种甲壳类动物的腹足结构，以了解它们的运动方式。

9.The pleopod is crucial for the reproductive success of many aquatic species.

对于许多水生物种来说，腹足对繁殖成功至关重要。

作文

The intricate world of marine biology is filled with fascinating creatures, each equipped with unique adaptations that allow them to thrive in their environments. One such adaptation can be observed in crustaceans, particularly in the structure known as the pleopod. The term pleopod refers to a specific type of limb found on the abdomen of many aquatic arthropods, including shrimp and crabs. These appendages play a crucial role in locomotion and reproduction, showcasing the remarkable evolutionary strategies of these organisms.The primary function of the pleopod is to aid in swimming. Unlike the larger, more powerful limbs used for walking and grasping, the pleopod is typically smaller and more delicate, allowing for rapid and agile movements through water. When a shrimp propels itself forward, it uses its pleopods in a coordinated manner, creating a wave-like motion that enhances its speed and maneuverability. This ability to navigate swiftly through the water is vital for escaping predators and catching prey, illustrating the survival advantages conferred by the pleopod.In addition to their role in movement, pleopods are also important during the reproductive cycle of many crustaceans. Female shrimp often use their pleopods to carry fertilized eggs, providing protection and a stable environment for the developing embryos. This nurturing behavior highlights the multifunctional nature of the pleopod, as it not only serves in locomotion but also in the continuation of the species. By safeguarding their young, female crustaceans increase the likelihood of survival for the next generation, showcasing the intricate relationship between anatomy and reproductive success.The structure of the pleopod can vary significantly among different species, reflecting the diverse ecological niches they occupy. For example, some species have evolved pleopods that are adapted for grasping or holding onto surfaces, which is essential for those that dwell in rocky environments. Others may have pleopods designed for filter-feeding, allowing them to efficiently gather food particles from the water. This diversity underscores the adaptability of crustaceans and the importance of the pleopod in their evolutionary history.Research into the function and structure of pleopods continues to provide insights into the biology of crustaceans. Scientists study these appendages not only to understand the mechanics of movement but also to explore evolutionary relationships among different species. By examining the variations in pleopod morphology, researchers can infer how environmental pressures have shaped the adaptations of these organisms over time.In conclusion, the pleopod is a remarkable example of how evolution has crafted specialized structures to meet the needs of various species. Its roles in locomotion and reproduction highlight the complexity of marine life and the intricate connections between anatomy and behavior. As we continue to explore the depths of our oceans, the study of pleopods and other unique adaptations will undoubtedly reveal more about the wonders of aquatic ecosystems and the creatures that inhabit them.

在海洋生物学的复杂世界中，充满了迷人的生物，每一种生物都具备独特的适应能力，使它们能够在环境中生存。其中一种适应能力可以在甲壳类动物中观察到，特别是在称为pleopod的结构上。术语pleopod指的是许多水生节肢动物（包括虾和蟹）腹部上的一种特定类型的肢体。这些附肢在运动和繁殖中发挥着至关重要的作用，展示了这些生物非凡的进化策略。pleopod的主要功能是帮助游泳。与用于行走和抓握的较大、更强大的肢体不同，pleopod通常较小且更精致，允许在水中迅速而灵活地移动。当虾向前推进时，它利用其pleopod以协调的方式运动，创造出波浪般的动作，增强其速度和机动性。这种在水中迅速导航的能力对逃避捕食者和捕捉猎物至关重要，说明了pleopod所赋予的生存优势。除了在运动中的作用，许多甲壳类动物的繁殖周期中，pleopod也很重要。雌性虾常常使用其pleopod来携带受精卵，为发育中的胚胎提供保护和稳定的环境。这种养护行为突显了pleopod的多功能性质，因为它不仅在运动中发挥作用，还在物种延续中发挥作用。通过保护幼崽，雌性甲壳动物增加了下一代生存的可能性，展示了解剖结构与繁殖成功之间的复杂关系。不同物种的pleopod结构可能会有显著差异，反映出它们所占据的多样生态位。例如，一些物种的pleopod已经进化成适合抓握或附着在表面的形态，这对于生活在岩石环境中的物种至关重要。其他物种可能具有适合过滤取食的pleopod，使它们能够高效地从水中收集食物颗粒。这种多样性突显了甲壳类动物的适应性以及pleopod在其进化历史中的重要性。对pleopod的功能和结构的研究继续为我们提供关于甲壳类动物生物学的见解。科学家们研究这些附肢，不仅为了理解运动的机制，还为了探索不同物种之间的进化关系。通过检查pleopod形态的变化，研究人员可以推断出环境压力如何塑造了这些生物的适应性。总之，pleopod是一个非凡的例子，展示了进化如何打造专门结构以满足各种物种的需求。它在运动和繁殖中的作用突显了海洋生命的复杂性以及解剖结构与行为之间的微妙联系。随着我们继续探索海洋的深处，对pleopod和其他独特适应性的研究无疑将揭示更多关于水生生态系统及其栖息生物的奇迹。