Most fish lay eggs, and it is fertilized outside of their body. Fish that spawn, are called oviparous. But some fish give birth to live fry. Such fish are called viviparous.
To live-bearing are guppies, sword fish. The eggs of these fish are fertilized inside the mother’s body and develop there until the fry. At a certain time they are born. This happens 21 days after fertilization.
The number of eggs, fertilized and deferred, differs greatly depending on the type of fish. Some fish lay eggs and abandon her, without showing her any more interest. This is a fish that produce huge amounts of eggs. Those fish that look after their young, they lay only a few eggs.
Caviar can be of two types. One kind of eggs floats on the water surface, the other sinking. The caviar, which floats, is called pelagic. It is usually tiny, bright and contains a lot of protein. Caviar, which is sinking, is called Donna. It is usually harder and more protein in it. Continue reading
Interested in your opinion – how to choose safe salmon, all adored the fish.
A few tips:
1. Do not buy fish with meat a bright pink color. Diet artificial fish defective, there is no shrimp and plankton, so the meat is pale.
2. Note the streaks in the Phil. If they are white, not bright pink, the dye was not used. If a fish’s little fins and red meat, so she was pumped full of dyes and growth stimulants.
Most often in fish stores buy pangasius and tilapia, because they are delicious and not very expensive. This fish brought to us from China and Vietnam – where its bred on small farms. So grown and salmon, Dorado, sea bass, sole, carp, pangasius, tilapia. Experts say that foreign products are not really fish. It can be compared to chicken-broiler. Artificial salmon are bred in special cages where the fish lives almost without movement, growth stimulants, give food with dyes, which give the meat a “dirty” color, and are pumped with antibiotics. Continue reading
Typical representatives of the nekton is the herring. It is well known that this fish has great commercial value. Until comparatively recently, it was promyshlyali in such large quantities that its price was very low, despite excellent taste and nutritional quality. In recent years, due to the sharp increase of the fishing fleet and introduction of intensive methods of production occurred overfishing. The number of herring in the oceans have decreased dramatically.
If in the future the intensity of the herring fishery will increase or even remain at current levels in the coming years, this valuable food fish will become a Museum rarity. Reduction of stocks of herring and concerned consumers and fishermen, but the first sounded the alarm scientists.
The appearance of the herring is well known to everyone, but it is unlikely that the layman can easily distinguish one kind of herring from another: the difference between them for the untrained eye to be insignificant. Species differences are not only in the details of the structure and the size of the fish, much deeper than they differ from each other in biology, numbers, distribution. Therefore, the fishery for mackerel fishes should be strictly subordinated to scientific data, to each type needs special approach. Continue reading