vesikirvat

Vesikirput are small crustaceans belonging to the order Cladocera. They are commonly found in freshwater environments worldwide, including ponds, lakes, and slow-moving streams. Despite their name, they are not true fleas but are more closely related to other crustaceans like shrimp and crabs.

These tiny arthropods are characterized by their transparent, bivalve-like carapace, which encloses most of their body. They possess large, prominent antennae, which they use for swimming and sensing their surroundings. Their movement is typically jerky, often described as "jumping," hence the common name "water flea."

Vesikirput play a crucial role in aquatic ecosystems. They are primarily filter feeders, consuming algae and other microscopic organic matter. This feeding behavior helps to keep the water clear and controls algal blooms. In turn, they serve as a vital food source for a wide range of aquatic organisms, including small fish, insect larvae, and other invertebrates, forming an important link in the food web.

Their life cycle involves both sexual and asexual reproduction. Under favorable conditions, they reproduce asexually, producing asexually reproducing females. When conditions become unfavorable, such as a lack of food or extreme temperatures, they can produce males and females that mate and lay resting eggs, also known as ephippia. These resting eggs are highly resistant and can survive harsh conditions, hatching when favorable conditions return. This ability to produce resting eggs allows vesikirput to survive environmental challenges and recolonize habitats.