Growth performance of Nile tilapia [Oreochromis niloticus] fingerlings raised in an earthen pond

• Autorzy: Bahnasawy M H , Abdel-Baky T E , Abd-Allah G A
• Języki publikacji: EN

Abstrakty

EN

An experiment was conducted to evaluate the growth performance of Nile tilapia fed with supplemental feed (25% crude protein) at 50% satiation. Juvenile Nile tilapia (average weight 6.4 g) were stocked in an earthen pond at 2.4 fish m⁻² . The pond was fertilized twice weekly with a mixture of superphosphate and urea fertilizer (68 kg ha 1⁻¹). The annual fish yield was 6880 kg ha⁻¹. The mean weight of harvested fish ranged from 110 to 250 g. The food conversion ratio (FCR) was 0.82, the average daily weight gain (ADG) was 0.9 g d⁻¹ and the specific growth rate was 1.55 % d⁻¹. This study demonstrated that 50% satiation feeding is an effective feeding rate for improving the production of Nile tilapia cultured in a fertilized, freshwater earthen pond.

PL

Celem badań było określenie tempa wzrostu, składu ciała narybku tilapii nilowej (początkowa masa ciała 6.4 g) żywionego paszą sztuczną zawierającą 25% białka (tab. 1). Eksperyment przeprowadzono w stawie ziemnym, a poziom żywienia wynosił 50% dawki maksymalnej. W czasie podchowu, trwającego 210 dni, bieżąco monitorowano jakość wody, a także skład jakościowy i ilościowy fitoplanktonu i zooplanktonu (tab. 2 i 3). Współczynnik pokarmowy paszy wyniósł 0,82, dzienny przyrost masy ciała 0,9 g d⁻¹, a wskaźnik SGR 1,55 % d⁻¹ (tab. 4). Przeanalizowano również wpływ żywienia na skład ciała tilapii nilowej (tab. 5) i ekonomiczne wskaźniki tejże produkcji (tab. 6). Badania wykazały, ze stosowanie uzupełniającego żywienia paszą sztuczną, na poziomie 50% dawki maksymalnej, pozwala zwiększyć efektywność produkcji tego gatunku w stawach ziemnych.

Słowa kluczowe

EN

earthen pond; rural development project; fish culture; Nile tilapia; Oreochromis niloticus; fershwater pond; growth performance

• Wydawca: -
• Czasopismo: Archives of Polish Fisheries
• Rocznik: 2003
• Tom: 11
• Numer: 2
• Opis fizyczny: p.277-285,ref.

Twórcy

autor

Bahnasawy M H

• Zoology Department, Damietta Faculty Of Science, Damietta, Egypt

autor

Abdel-Baky T E

• Zoology Department, Damietta Faculty Of Science, Damietta, Egypt

autor

Abd-Allah G A

• Zoology Department, Damietta Faculty Of Science, Damietta, Egypt

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