biology
Animal Diversity
The number of animal varieties familiar to us is vast as the animal world is diverse. Each distinct variety or type of animals is recognized by scientist as a species. Animals of most species are free-living forms but of others are parasitic in bodies of other animals or even plants.
According to their habitats animals are divided into the following types Aquatic animals :- They live in water . Animals living in sea water are called marine & those live in river,ponds,streams,etc are called as fresh water. Aquatic are of different types like- Zooplankton :- Passively floating in water Nanoplankton – Extremely small plankton. Nekton – the aggregate of actively swimming aquatic organism in a body of water able to move independly of water currents is called nekton Benthos – those animals found living on the sea bottom Littoral – Animals living in intertidal zone of sea-coast are called littoral Neritic – pelagic forms that live in coastal waters where the sea bottom is upto about 200 mt deep are called neritic Lentic – of the fresh water that inhabits standing water Lotic – Forms that inhabit running fresh water Neuston – a collective term used for organisim which rest on the surface of an aquatic ecosystem. Anadromous – marine fishes that migrate from sea water to river water Catadromous – Those fish that migrates from river to sea Euryhaline – Fishes that migrate between fresh ,estuaries & salt water have a wide salinity tolerance . Stenohaline – these fishes have a only narrow range of salinity tolerance Terrestrial animals:- They live on lands and are of different types. Cursorial – they run fast ,eg- Kangroo,dog , horse,etc Fossorial – They live in burrowing/underground , e.g- earthworm , rabbit ,etc Arborial – they live on trees , e.g bats, monkeys, etc Scansorial – They climb walls , rocks,etc e.g. wall lizards , flying squirrel.
The number of animal varieties familiar to us is vast as the animal world is diverse. Each distinct variety or type of animals is recognized by scientist as a species. Animals of most species are free-living forms but of others are parasitic in bodies of other animals or even plants.
According to their habitats animals are divided into the following types Aquatic animals :- They live in water . Animals living in sea water are called marine & those live in river,ponds,streams,etc are called as fresh water. Aquatic are of different types like- Zooplankton :- Passively floating in water Nanoplankton – Extremely small plankton. Nekton – the aggregate of actively swimming aquatic organism in a body of water able to move independly of water currents is called nekton Benthos – those animals found living on the sea bottom Littoral – Animals living in intertidal zone of sea-coast are called littoral Neritic – pelagic forms that live in coastal waters where the sea bottom is upto about 200 mt deep are called neritic Lentic – of the fresh water that inhabits standing water Lotic – Forms that inhabit running fresh water Neuston – a collective term used for organisim which rest on the surface of an aquatic ecosystem. Anadromous – marine fishes that migrate from sea water to river water Catadromous – Those fish that migrates from river to sea Euryhaline – Fishes that migrate between fresh ,estuaries & salt water have a wide salinity tolerance . Stenohaline – these fishes have a only narrow range of salinity tolerance Terrestrial animals:- They live on lands and are of different types. Cursorial – they run fast ,eg- Kangroo,dog , horse,etc Fossorial – They live in burrowing/underground , e.g- earthworm , rabbit ,etc Arborial – they live on trees , e.g bats, monkeys, etc Scansorial – They climb walls , rocks,etc e.g. wall lizards , flying squirrel.