Head lice caligoida Outline of a head copepods parasitic animals. Very different types of morphological variation, the type of lice can be represented subjects. Similar to the shape of male and female lice. Cephalothorax width and dorsal-ventral level flat, often oval. Carapace chitin on Long lines, was h-shaped, said rib ridge. Section 4 is very small chest, the chest section for free. In the first section of the chest between 3,4 a joint activity. Reproduction section is generally not more than the head and chest. Abdomen narrow small. Fork of different shapes, usually the end of bristle ends. Mandibles long and narrow, and on the lower lip form the mouth tube, can be smoked host blood. Zonal oocysts, eggs 1. Lice Department and nearly all marine species. Common are: parasitic on the mullet of the east fish lice, parasitic on shad shad lice, parasitic on the white tuna tuna BU lice and so on. Freshwater species discovered in Yunnan only one kind - the amount of fish lice arc. Another section is the petals lice Department, the whole system of parasites on gills, in the Yellow Sea, Bohai Sea and South China Sea are distributed.
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Outline
鱼虱目 概述
鱼虱目 概述
Fish, milkfish (Caligoida) is the Arthropoda (Arthropoda), crustacean subphylum (Crustacea), Gang copepods (Copepoda) a head. The present animal parasites.
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Morphology
The various classes of animals large morphological variation, the type of lice subjects may be their representative. Male and female are similar in shape. Cephalothorax width and dorsal-ventral level flat, often oval, the head and chest sections 1 to 3 from healing. The front end has a head and chest, the amount of board, the amount of adsorption of the board majority has two organs, called before the lunar surface. Carapace chitin on Long lines, was H-shaped, said rib ridge. Rib ridge extending to the two side ribs on both sides. The edge of the carapace - the edge of the circle transparent film. Section 4 is very small chest, the chest section for free. In the first section of the chest between 3,4 a joint activity. Reproduction section is generally not more than the head and chest. Narrow abdomen is small, there are longer than the reproduction section, points 1 to 4. Fork of different shapes, usually the end of bristle ends. Cephalothorax appendages are antennae 1, 2 antennae, mandibles, first maxillae, second maxillae, the first full jaw, jaw 2 feet, 1 to 3 feet on the chest. Section 4 on the 4th thoracic pereiopods. Pereiopods 5 and 6 only a small protrusion on one or several root _set_ae, located in the reproductive section of the rear corner. In addition, the central ventral cephalothorax 1 foot in front of the chest has an inverted "U" shaped chest fork, one of the signs is to identify the species. 1 tentacles normally takes two, the base section of large, thick clouds of feathery bristles front, the base section may be related to the amount of board and healing of the previous month; distal short fine. Mandibles long and narrow, and on the lower lip form the mouth tube, can be smoked host blood. Zonal oocysts, eggs 1.
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Life history
鱼虱目 生活史
鱼虱目 生活史
鱼虱目 生活史
鱼虱目 生活史
First, the eggs hatched nauplii molt once the first two nauplii, or after the nauplii. And then molt into larval copepods. Copepods in the water free-swimming larvae, the first two tentacles is well developed, strong claw end, find the host, that is, with the first two tentacles around the host's body surface or fins, the larvae molt once become attached. Attached to the larvae molt three times total, sub-4. Larvae attached to the front with the amount of physical adsorption on fish wire. Molt, the amount of wire does not fall off, which shed 1 per skin, the more the amount of fibroin Division 1 "plate clip." To four attached larvae, have been distinguishing gender. No. 4 attached to the larvae molt into the adult pre-, or No. 5 attached to the larvae. At this time the male is mature, and females have not yet fully mature. After the pre-adult molt, that becoming an adult. Amount and the amount of wire to connect the central office board disengaged. Female, male lice to mate, they can be doing short-term free-living, then look for places in the main parasitic life. Therefore, fish can be found on both male and female individuals, can also be used in sea plankton netting too.
