Insect water or water insect undergo part of its life cycle in water. They feed in the same way as other insects. Some insects , such as predatory bleeding beetles, can hunt for underwater food where insects living on land can not compete.
Video Aquatic insect
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One problem that aquatic insects have to overcome is how to get oxygen when they are under water. All animals need a source of oxygen to live. Insects draw air into their bodies through the spiracles, holes found along the side of the abdomen. This spiracel is connected to a tracheal tube in which oxygen can be absorbed. All aquatic insects have adapted to their environment by specializing in this structure
- Aquatic adaptations
- A simple diffusion above a relatively thin integer
- Temporary use of hot air balloons
- Extraction of oxygen from water using a plastron or physical gill
- Storage of oxygen in hemoglobin molecules in hemolymph
- Takes oxygen from the surface through the breathing tube (siphon)
Larvae and nymphs of flies, dragonflies and stone flies have trachea but when at the larval stage the trachea is connected to the gill, which is a very thin extension of the exoskeleton through which oxygen in the water can spread.
Some insects have solid hair (setae) around the spiracles that allow air to stay close, while keeping water away from, the body. The trachea opens through the spiracles into the aerial film, allowing access to oxygen. In many such cases, when an insect dives into the water, it carries a layer of air above its surface, and breathes it using the trapped air bubble until it runs out, then returns to the surface to repeat the process. Other types of insects have a physical plastron or gill that can be various hair combinations, scales, and undulations projected from the cuticle, which holds a thin layer of air along the outer surface of the body. In these insects, the film volume is small enough, and their respiration is quite slow, the diffusion of the surrounding water is enough to fill the oxygen in the air bag as quickly as it is used. A large proportion of the nitrogen in the air dissolves in water slowly and maintains the gas volume, supporting the diffusion of oxygen. These types of insects only rarely need to fill their air supply.
Other aquatic insects may remain under water for long periods due to high hemoglobin concentrations in the hemolymphs that circulate freely within their bodies. Hemoglobin is strongly bound to oxygen molecules.
Some insects such as water scorpions and mosquito larvae have a breathing tube ("siphons") with openings surrounded by hydrofuge hair, allowing them to breathe without having to leave the water.
Maps Aquatic insect
Orders with aquatic or semi-aquatic species
- Collembola - springtail (which is not a technical insect, but closely related)
- Ephemeroptera - the dragonflies
- Odonata - dragonflies and damselflies
- Plecoptera - stoneflies
- Megaloptera - fly alang, fish, and dobsonflies
- Neuroptera - lacewings
- Coleoptera - the beetle
- Hemiptera - original bug (water strider, giant water bug)
- Hymenoptera - ant (eg Polyrhachis sokolova ) and wasps
- Flies and mosquitoes
- Mecoptera - scorpionflies
- Lepidoptera - moths
- Trichoptera - caddisflies
References
- Drees, B.M. and Jackman, J. (1999), "Diving Beetle" at Field Guide to Texas Insects, Gulf Publishing Company, Houston, Texas. (Retrieved 9 January 2009)
- Farb, P. (1962). The Water Dwellers [LIFE] INSECTS p. 142.
- Meyer, J.R. (2006), "Respiration in aquatic Insects". (Retrieved 25 April 2008)
- Stanley, D. and Bedick, J. (1997). "Respiration in aquatic insects". (Retrieved 27 December 2003)
- Wigglesworth, Vincent B. Sir (1964). Insect life. Weidenfeld & amp; Nicholson, London
External links
- Insect stages - "Some larvae, nymphs and adult insects that live in fresh water." UK-based website with microscopic photos of various insects and other microorganisms and biological information.
Source of the article : Wikipedia
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