consists

Dangerous for human

I will begin with the sharks.

the sand shark reaching a length of 4.3 m, from the squad lunoobraznye. Common in tropical coastal waters of all continents, this shark everywhere behaves quite peacefully and only sand sharks Africa has a bad reputation of man-eaters.

Silver shark (Carcharhinus albimarginatus). Reaches 3M in length with a weight of 160kg. Potentially dangerous: one unprovoked attack on a swimmer.

Blacktip shark (Carcharhinus few). Length 2.5 m, weighs 120kg. Attacks on humans do happen, but none of them serious injuries not ended.

Oceanic, the oceanic whitetip shark (Carcharhinus longimanus) . Around 3.5-4m in length with a weight of 170 kg. Most of the victims of the shipwreck in the open ocean on her conscience.

Korotkoplodnyh Mako shark (Isurus oxyrhinchus) . This is the fastest of all the sharks. Reach a length of 3.2-3.8 m with a maximum weight kg. Considered one of the most dangerous to humans.

Giant hammerhead shark (Sphyrna mokarran) . Is 6.1 m and weigh 450 kg. Several dozen cases of attacks on people,including lethal.

Whale shark (Rhincodon typus) . Up to 18m in length and a weight of 15t or more. Feeds on plankton and is completely harmless. Continue reading

Fish nutrition in nature

To properly feed the fish in captivity, it is important to know how they feed in nature, and what habits related to nutrition, there are the fish of each particular species.

Natural forage

In the wild, fish use very diverse sources of food:

— decaying organic matter;

— bacteria;

— protozoa and other microorganisms;

— aquatic plants and algae;

— fruits and seeds;

— invertebrate animals (e.g. insects, worms, snails, crustaceans);

— other fish;

— amphibians; Continue reading

Fish farming in ponds

The pond in which they farm fish – is essentially the same cattle farm, requiring constant attention, but also has high economic efficiency.

With the right approach fish farming can be a quite profitable business. In recent times, agriculture of Russia there has been a positive trend in the sector for the breeding of pond fish. This trend in the economy attracts more and more representatives of small and medium-sized businesses. I should say that this activity has many nuances and specifics that you should consider when beginning this form of agricultural activity.

Even biology and appearance has its own special features and nuances to breeding particular breeds.

Thermophilic species, such as carp, prefers to dwell in the muddy ponds, stagnant water. This kind of pond you should build when breeding this breed. Carp doesn’t use all food resources designated water body. In order to increase economic efficiency and to use resources in full volume, experts recommend to plant in pond to carp fish with another food. For example, herbivorous. Such as tench, Amur, silver carp. But sometimes you can get and predators – pike, perch. Continue reading

The most incredible inhabitants of the deep sea
1. Horned hare This lovely creation is very similar to pokemon. However, sensing the danger, the fish begins to secrete a deadly toxin. 2. The Mediterranean galloper Their distinctive feature…

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How to breed fish in ponds
Pond fish farming is the breeding of commercial fish in specially adapted or constructed for this purpose reservoirs. Farms can be full (full system) or incomplete (napolnitelem). In full system…

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Fish farming in ponds
The pond in which they farm fish – is essentially the same cattle farm, requiring constant attention, but also has high economic efficiency. With the right approach fish farming can…

Continue reading →