Process for rearing pike-perch fry

• Main Authors: TODERAS ION, USATII MARIN, SAPTEFRATI NICOLAE, USATII ADRIAN, KREPIS OLEG, USATIHJ MARIN, APTEFRA I NICOLAE, CREPIS OLEG, TODERA ION
• Format: Patent
• Language: English; Moldavian; Romanian
• Published: 30.04.2012
• 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.