Together with two other species (bighead carp and silver), commonly known as often “Chinese carps” in reference to its origin. Sogyo name is originally from Japan. All these tents, They have herbivorous or vegetarian habits, but each, They are feeding different types of plants: herbivorous on higher plants and seaweeds and water remaining on lower plants; can when small, also ingest microscopic animals called zooplankton belonging to.
The scientific name is grass carp Ctenopharingodon idella and refers to the teeth that form “pains” (ctenos) present in the pharyngeal structure.
It is a freshwater fish, reaching larger sizes, weighing up to about 45 kg y 1 m long in natural environments where originates. Data entered on growth, point increase 9-10 cm in the term of the first 4 a 5 years and 6-7 cm in the span of 6-7 years; increasing 2,5 cm from the 8 year old. On average usually reach 20 a 30 cm in total length per year and the 4 years, measuring over 70 cm and weigh about 6 kilos. It presents back of dark gray and green-gray flanks, in general. The scales often have a dark brown at base. The body is oblong, rounded belly and wide head. The mouth is terminal, sometimes oblique and presents simple lips. The upper jaw is slightly protráctil. Dorsal fins and anal fins are short and lack spines. It has numerous gill arches and the aforementioned pharyngeal teeth.
Globally, this species together with other carp, It contributes to the total production from inland waters and has been cultivated for centuries in ponds, especially with other fish polyculture. In 1989, contributed a 8% the global crop production statistics, having increased lately.
The herbivore eating habit, It characterized by eating foods associated to morphological and anatomical diagram showing, as is the oblong shape of the body, position of the mouth and pharyngeal teeth, gill combs, etc. The oblong body, for example, is typical fish ingest vegetation on both substance and water column and this habit is associated with the mouth of terminal type and to the presence of small pointed teeth. Pharyngeal teeth are well developed and specialized for a maintenance diet based on crushing plant. These changes in structure to move from stadiums juvenile to adult. This allows greater specialization in the case of adults, intake stems and emergent plants and even highly fibrous plant. Teeth play a role, the food preparation for digestion, cutting or breaking into small particles.
Scientists have not been able to corroborate the presence of enzymes that may allow the assimilation of cellulose and generally, the data are controversial (vertebrate animals lacking this enzyme); although apparently, in this type of fish exist enzymatic digestion of cellulose.
Existing aquatic plants in natural or artificial environment, They may be of floating type, submerged and emergent. According to bibliographic data, the most invasive and clearly negative effects, They are floating because they have high growth, block light, cause reduced dissolved oxygen in water (used by aquatic fauna) and can even form islets or rafts (common case of camalotes); acting together with other species and produce disasters especially during major floods (tamponade, destruction of bridges, etc.). Water hyacinth, for example, It is perhaps the aquatic plant that has caused more problems in countries where it was introduced (Africa currently, It takes an enormous budget spent, unable to eradicate). Other cases of negative vegetation, introduced to other countries, what they are called “water cabbages” Pistia and the Salvinia. These vegetables are considered a real pest because of its introduction into areas where they have appropriated environments, invadiéndolos and causing major problems in different resources.
Submerged plant species, They reproduce by stolons and are widely invade aquatic environments, because they are very tolerant to different environmental parameters. The most prolific in our environment are Ceratophyllum and Myriophyllum genres (Fox tail) and in some cases, the Potamogeton, and water cabbages. Emerging plants, as reeds and generally TIFAs (gender Phragmites y Typha) They reproduce by stolons or rhizomes and sexually, so their seeds are expanded by winds facilitating their subsequent dispersion and invasion.
Aquatic vegetation can be controlled mechanically, chemical and / or biological. In the latter case, The methodology is based on the use of herbivorous fish, as in the case of carp, yields high response, because of its specificity. For this tent, biologically began to be investigated in the period 1950 a 1960. The ex- URRS made several introductions for the year '37, with copies from the Amur River, in China, and he began to get positive results in the area of water bodies Moscow, between 1958 Y 1963. Since then, Numerous studies on the control exercised by these fish on aquatic vegetation have been made, the main ones being made by the same ex-USSR, Netherlands and the United States. The Netherlands imported from Hungary and Taiwan and all studies showed promising results in terms of control. As its natural reproduction is impossible in environments introduction, closed type and lentic, with virtually no water exchange. For them, grass carp, It proved to be a good driver aquatic weeds, always with proper management of each particular situation.
The amures eat at all levels, in the bottom half and surface waters.
Usually the common carp baits used to serve the amur,but mostly what they like most is corn and tutti-frutti boilies,pellets are also a good alternative.
When fish it can use both normal as floating mounts, often these best last due to caresteristicas amur the mouth of this higher than carp,conditioned at the base of their diet that are plants.
In warm weather surface baits catch, and they are seen prowling the bait before deciding to catch him.
Because amures are easily damaged, It is essential careful treatment, debolverlos water and most immediately.
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