When we read the price tag on “butterfish”, we don’t always know what we buy, then what under the trade name “butterfish” are hidden very different between fish from the three different families and four genera: two species from the family stromateid – stromateus (Stromateus brasiliensis) and the American butterfish (Peprilus triacanthus) . Australian seriolella (Seriolella brama) from the family centrality, as well as Escolar or gray delicacy mackerel (Lepidocybium flavobrunneum) from the family gimpelevich. Sometimes oil fish sold as toothfish is a much more valuable under the threat of destruction of fish, at least – on the contrary, often these names are given together. Usually trade name brings together related species. Here we have an unusual case – a trade name is formed primarily on the basis of similarity in the taste, although oily fish and have some similarities in appearance and lifestyle. Moreover, this name is not our invention. Perhaps it comes from the U.S. oil fish, which in English is called “butterfish”. Continue reading
Among the modern sharks should first be noted epipelagic planktophagous of being the largest members of the superorder, class, and all living groups participatng animals. These giants feed on similar to baleen whales, filtering thousands of cubic meters of water through a “net launcher”. which has become Horny Gill stamens of these sharks. Remaining in the oral cavity Maso and Munro – plankton (except for especially large objects) and serves as food sharks planktophagous. Just today there are three such shark: giant whale, which the inhabitants of epipelagial, and largemouth tending to mesopelagial, for depths greater than 150 m.
These sharks differ from individuals of other species by a number of morphological features associated with the specifics of the production of food. First of all here should stay on the morphology of the Gill apparatus sharks planktophagous, Except a kind of Gill rakers, they have a very large mouth, largemouth and whale sharks is almost final. Epipelagic sharks-planktology filter huge amounts of water and thus receive the necessary amount of food in places of mass accumulations of planktonic organisms,so the whale and especially of basking sharks clearly feed migration. Continue reading
Few people know the difference, the difference in the words “the pond”, “lake”, “reservoir”, meanwhile, the understanding of each of these words leads to understanding fishing in these places, eventually, to success, to the fish.
What is the difference between fishing on a pond from fishing, say the reservoir ?
To begin with, the pond and the reservoir is, in any case, artificial water features, while the lake is actually a naturally occurring body of water.
The pond is always created for human needs. Goals can be different: irrigation of any land, often fields, water, for sanitary or service needs and, of course, for fish farming.
Differences between the pond and the reservoir are enclosed in the volume of water contained in each water body. It is considered that if it to 1 million cubic meters of water, this body of water is called a pond, if more than a million – reservoir. That would not get lost in the numbers, imagine an artificial reservoir in the length and width of 600 meters and an average depth of 2 meters, this would be considered a pond, if the average depth is 4 meters – that is the reservoir. Continue reading