Process for rearing pike-perch fry

• Main Authors: CREPIS Oleg, USATÎI Adrian, TODERAŞ Ion, USATÎI Marin, ŞAPTEFRAŢI Nicolae
• Format: Patent
• Language: English; Romanian; Russian
• Published: 30.11.2012
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; FODDER; FOODS OR FOODSTUFFS; FORESTRY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HUMAN NECESSITIES; HUNTING; NEW BREEDS OF ANIMALS; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES; TRAPPING

The invention relates to industrial fish farming, in particular to a process for rearing pike-perch fry.The process includes the rearing of pike-perch larvae during two days in flow-through tanks or cages with the introduction of a biostimulating supplement, subsequent transfer of larvae into a pond at a density of 100...150 thousand of specimen/ha and rearing with natural feeding. On the 20th and 30th day of pike-perch development is carried out placement in the pond of low-value and trash fish small fry in the ratio with the pike-perch of 10:1, and, beginning with the 36...40th-day age of pike-perch when it reaches the average weight of 2 g and body length of 6...7 cm and up to two-month age, is carried out the daily placement of low-value and trash fish small fry at the rate of 10% by weight of pike-perch per day, and then is carried out the daily placement of low-value and trash fish fry with the elongated shape of the body of a length of 2.5... 3.0 cm at the rate of about 4% by weight of pike-perch. Invenţia se referă la piscicultura industrială, în particular la un procedeu de creştere a puietului de şalău.Procedeul include creşterea larvelor de şalău timp de două zile în recipiente cu apă curgătoare sau în viviere cu introducerea unui aditiv biostimulator, transferarea ulterioară a larvelor în heleşteie la o densitate de 100...150 mii de exemplare/ha şi creşterea lor cu alimentare naturală. La a 20-a şi a 30-a zi de dezvoltare a şalăului se efectuează plasarea în heleşteie a puietului speciilor economic depreciate în raport cu şalăul de 10:1, iar, începând de la vârsta şalăului de 36...40 zile la atingerea masei medii de 2 g şi lungimii corporale de 6...7 cm şi până la vârsta de 2 luni, se efectuează plasarea zilnică în heleşteie a puietului speciilor economic depreciate din calculul de 10% din masa şalăului pe zi, după care se efectuează plasarea zilnică a puietului speciilor economic depreciate cu forma alungită a corpului cu lungimea de 2,5...3,0 cm din calculul de circa 4% din masa şalăului. Изобретение относится к промышленному рыбоводству, в частности к способу выращивания молоди судака.Способ включает подращивание личинок судака в течение двух суток в проточных емкостях или садках с внесением биостимулирующей добавки, последующую пересадку личинок в пруд при плотности 100...150 тыс.экземпляров/га и выращивание при естественном питании. На 20-е и на 30-е сутки развития судака осуществляют подсадку в пруд мелкой молоди малоценных и сорных рыб в соотношении с судаком 10:1, а, начиная с 36...40 дневного возраста судака при достижении им средней массы 2 г и длины тела 6...7 см и до 2-х месячного возраста, осуществляют ежедневную подсадку мелкой молоди малоценных и сорных рыб из расчета 10% от массы судака в сутки, после чего осуществляют ежедневную подсадку молоди малоценных и сорных рыб с продолговатой формой тела длиной 2,5...3,0 см из расчета около 4% от массы судака.