PROCESS FOR GROWING FRESH-WATER CRAYFISH (ASTACUS LEPTODACTYLUS ESCH.) IN MIXED CULTURE WITH NON-PREDATORY SPECIES OF FISH

The invention relates to a process for growing fresh-water crayfish in mixed culture with non-predatory species of fish, comprising a first stage where the shelters for the juveniles are placed in some ponds, the ponds being then filled with water during the period from the 10-th to the 20-th of May...

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Hauptverfasser: PECHENU CONSTANTIN, JECU ELENA, MIHALACHE GRIGORE, POPA CARMEN, BOCĂNEALĂ VASILE
Format: Patent
Sprache:eng ; rum
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Zusammenfassung:The invention relates to a process for growing fresh-water crayfish in mixed culture with non-predatory species of fish, comprising a first stage where the shelters for the juveniles are placed in some ponds, the ponds being then filled with water during the period from the 10-th to the 20-th of May, when the temperature of the water is of 18 °C, during the period from the 1-st to the 15-th of June said ponds being populated with juveniles of 5...10 days of age, at a density of 1...8 individuals/ m2 of water surface, afterwards the ponds being populated with juvenile fish of 21 days of age, in October-November the juveniles of one summer of age being harvested, disinfected with formalin and the ponds being populated for wintering during the period from the 15-th of October to the 15-th of November. During the second stage, the fish ponds are populated with juveniles of one year old, at a density of 0.5...1 individual/m2 of water surface, and after the growing period the crayfish harvesting is carried out. Invenţia se referă la un procedeu de creştere a racului de baltă în policultură cu specii de peşti paşnici, în care, într-o primă etapă, are loc amplasarea refugiilor pentru puiet în nişte bazine, inundarea bazinelor în perioada 10...20 mai, când temperatura apei este de 18°C, popularea bazinelor în perioada 1...15 iunie cu puiet de 5...10 zile, la o densitate de 1...8 exemplare/mluciu apă, popularea bazinelor cu puiet de peşte în vârstă de 21 de zile, recoltarea puietului de o vară în perioada octombrie-noiembrie, deparazitarea acestuia cu formalină şi popularea bazinelor pentru iernat în perioada 15 octombrie-15 noiembrie. În cea de-a doua etapă, are loc popularea bazinelor piscicole cu puiet în vârstă de un an, la o densitate de 0,5...1 exemplar/mluciu apă, iar după parcurgerea perioadei de creştere, are loc recoltarea racilor.