marine

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How to choose aquarium shark?

A huge saltwater aquarium with a couple of real sharks, magnificent coral and other exotic inhabitants – the ultimate dream of every aquarist. However to embody conceived in a life company is not easy, because the development and maintenance of such an aquarium requires not only significant costs but also thorough knowledge.

Usually the volume of the aquarium is chosen based on the maximum size of the sharks, scheduled it to settle. For decorative aquarium sharks the size of 1.5 m is required amount of not less than 1000 litres. Great importance when calculating the capacity of aquarium have the characteristics of potential tenants: for example, whether to dwell in benthic or pelagic sharks .

Since the first able to breathe lying on the bottom, so they don’t need a massive site, like their pelagic counterparts, who have to constantly move .

A narrow aquarium or an aquarium with sharp corners so the sharks hard to turn, especially at high speed, and this greatly lowers their quality of life and even leads to disease. The most convenient habitat for pelagic sharks buitenkant with rounded corners, and even better – a circular aquarium.

Watch the video on “decorative Aquarium nurse shark”:

Aquarium shark saw:

Aquarium decorative shark versions and neighbourhood Continue reading

The denizens of the deep

What is life in the dark, deprived of light the depths of the ocean? The deeper one penetrates into the sea the daylight is, the faster it weakens. A traveler in the depths of the ocean V. Beebe writes that the water in the upper 50 m green color, at the depth of 60 m is greenish-blue or blue-green, 180 m in her clear blue color, at 300 m is a weak blackish-blue. Even at a depth of 580 m Bib caught the last traces of light. Various devices with photographic plates, and more precisely with the help of photomultiplier cameras detected that the light penetrates into the ocean to a depth of 1500 m. Deeper no devices it not get it. But animals and deeper 1500 m. They exist here in complete darkness, in which only here and there the glimmer of ghostly lights cold “living light”. Even on the biggest depth of about 11 thousand m — you can find animals. At this depth, they feel a tremendous pressure.

Life on the sea bottom at a depth of 3-5 m In the center — luminous brittle star hitching a ride, a spider crab and cancer munidopsis. For them. — animals leading a sedentary lifestyle, sea feathers. Top left — red crustacean shrimp.

The oceanic environment is called the realm of monotony. This is particularly true with respect to the depths of the ocean. Here in the water there are almost no oscillations of temperature and salinity. In the depths of the ocean and on its bottom life compared to being coastal in thousands and tens of thousands of times poorer. At the coast the number of benthic animals are often expressed by hundreds of grams or even a few kilograms per square metre of seabed. And in the depths of the ocean is equal to the number of sometimes only a few milligrams on the same area of bottom. The density of plankton in the coastal waters reaches hundreds, sometimes thousands of milligrams per 1 m 3. but in the depths it is limited to milligrams or even fractions of a milligram. This is primarily due to the abundance of food, at the coast and the lack of it in the depths of the ocean. Continue reading

Fishing

With age the fish get some “life experience”, which helps one to escape from enemies (anglers and predators), others of the predators to successfully hunt. Predatory fish, for example, invented different ways of fishing, your “jigs” and “spinners”. One such angler fish – marine fish-mouse – directly under the mouth is kind of “telescopic fishing rod” (Illicium), equipped with “mormyshka” – a brush of dark and Ryabykh skin outgrowths. Pulling a “lure”, the fish-mouse attracts curious victims to the jaws and grasp them with lightning speed.

Pike looks for food mostly by seeing it, her eyes are on the top of the head on this pike sees forward and upward. However, a pike and a sensitive olfactory apparatus. Thanks to the power of the body and jaws, great view of pike can eat almost everything, even carrion, which is especially important to learn for catching big pike!

Unlike many animals, who throughout life eat and live in a single biological niche, regardless of age and size, the pike during the growth shifts from one niche to another. In the process of growing the pike is changing the pattern of hunting and habitat in the reservoir (as well as most predatory fish).

Look for grayling should be open, shallow stretches with pebbly bottom between the rapids and shoals,where the grayling occupies a fossa near any shelters. Grayling lives in small groups, large specimens are kept more than alone. In addition grayling may indicate their presence, jumping out of the water for no apparent reason very highly. Need to behave as quietly as possible, especially on the rocky shore. On quiet evenings, when the air rises, the innumerable army of moths, mosquitoes and midges, grayling come out of the pits and cover the open space above the shoals, at the head of Islands and channels, to the banks with overhanging trees water and grass. Continue reading

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Fishing
With age the fish get some "life experience", which helps one to escape from enemies (anglers and predators), others of the predators to successfully hunt. Predatory fish, for example, invented…

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The feed efficiency of fish
Feeding fish often estimate the so-called feed ratio showing the amount of feed (in kg), should eat fish to give 1 kg of gain. For example, if they say that…

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Marine life
Seahorse.This is a small marine teleost fish of the family of marine needles of the needle-like detachment. Seahorses have a sedentary lifestyle, they are attached flexible tails to the stalks…

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