Morni Wildlife (Crustacean): Fresh Water Crab

November 28, 2012

A Fresh Water Crab seen in a stream at Bharal, Morni foothills

Crab in a stream at Bharal, Morni foothills
(Photo courtesy Rajesh Pandey)

Filed in: Wildlife

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An environmental enthusiast who loves tramping through the hills in search of the picturesque.

Comments (2)

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  1. Er.M.C.Aggarwal says:

    Wonderful , how the crab is appearing in Morni Hills ? It is an animal/ creature of
    ocean / sea shore.It is consumed for meat purpose in the world on a mass scale according to size / species .
    Morni is a place of verities if thoroughly
    searched .

    • @Er. Aggarwal, M.C. – Please see the caption of the post. It is “Morni Wildlife (Crustacean): Fresh Water Crab”.

      In fact, Freshwater crabs are found throughout the tropical and sub-tropical regions of the world. They live in a wide range of water bodies, from fast-flowing rivers to swamps, as well as in tree boles or caves. They are primarily nocturnal, emerging to feed at night; most are omnivores, although a small number are specialist predators, such as Platythelphusa armata from Lake Tanganyika, which feeds almost entirely on snails. Some species provide important food sources for various vertebrates. A number of freshwater crabs are secondary hosts of flukes in the genus Paragonimus, which causes paragonimiasis in humans.

      The majority of species are narrow endemics, occurring in only a small geographical area. This is at least partly attributable to their poor dispersal abilities and low fecundity, and to habitat fragmentation caused by the world’s human population. In West Africa, species that live in savannahs have wider ranges than species from the rainforest; in East Africa, species from the mountains have restricted distributions, while lowland species are more widespread.

      Every species of freshwater crab described so far has been assessed by the International Union for Conservation of Nature (IUCN); of the species for which data are available, 32% are threatened with extinction. For instance, all but one of Sri Lanka’s 50 freshwater crab species are endemic to that country, and more than half are critically endangered.

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