Comparative Growth Performance of Mono-sex and Mixed-sex Nile Tilapia (<i>Oreochromis niloticus</i> L.) in Pond Culture System at Sebeta, Ethiopian

Abstract

Comparative growth performance of hand-sexed male mono-sex and mixed-sex Nile tilapia (Oreochromis niloticus) was conducted in six earthen ponds (200 m 2 each) in semi-intensive culture system. Experimental ponds were stocked at a stocking density of 2 fish/m 2 . Fish were cultured for a period of 240 days and fed at a daily rate of 5% of fish body weight. The results of the experiment showed that male mono-sex tilapia showed significantly higher (P<0.05) growth rate (weight, length, DWG, SGR) than mixed-sex group. Generally, male mono-sex fishes reached a larger final individual size (176.20±18.01) g than mixed-sex ((108.20±15.4) g, P<0.05). This difference was more pronounced after the 6 th month during the culture period as the later started reproduction early in the production cycle. Analysis on the economic data indicated that both treatments showed positive net return for the culture periods of 6 months, 7 months and 8 months. However, there was a difference in attaining the optimum net return in culturing Oreochromis niloticus as male mono-sex and mixed-sex. The male mono-sex group attained its optimum net return after 6 months of culture periods, while the mixed-sex group attained after 8 months. Therefore, culturing for extra two months in the later case showed a 32% decline from the optimum net return. Hence growing male mono-sex Oreochromis niloticus for 6 months is profitable under Sebeta, Ethiopia condition.

Sexual dimorphism related to growth in climbing perch Anabas testudineus

“…Optimalisasi pertumbuhan ikan budidaya telah dilakukan pada budidaya ikan mas monoseks betina di Eropa Tengah yang secara signifikan memiliki bobot panen 29,7% lebih tinggi daripada campur kelamin (Kocour et al, 2005). Ikan nila monoseks jantan memiliki pertumbuhan tiga kali lipat (Chakraborty et al, 2011) atau dua kali lipat (Silva et al, 2012) dari ikan nila campur kelamin, dan pengembalian modal pada usaha pembudidayaan ikan nila monoseks lebih cepat daripada budidaya campur kelamin (Dagne et al, 2013). Beaven dan Muposhi (2012) menyatakan bahwa konversi pakan ikan nila monoseks yang diberi perlakuan berupa hormon 17α-metiltestosteron (1,68±0,01) secara signifikan lebih rendah daripada ikan nila tanpa perlakuan hormon (1,92±0,01).…”

Modulation of growth performance, feed utilization, and physiological traits in redbelly Tilapia (Tilapia zillii) through environmental and sex‐based interactions

“…Well-considered mono-sex culture is a preferred aquaculture model in some fish species due to differential growth rates between sexes (Dagne et al, 2013). However, since the guppies are sold in pairs on the market, the essence of our work was not a mono aquaculture model in which advantageous sex is preferred, but rather a comparison of mixed cultures with males and females grown separately.…”

“…The choice between mono‐sex (cultivating a single gender) and mixed‐sex (cultivating both males and females) populations is a fundamental decision that can significantly impact the outcomes of aquaculture operations (Shen & Wang, 2018). Well‐considered mono‐sex culture is a preferred aquaculture model in some fish species due to differential growth rates between sexes (Dagne et al, 2013). However, since the guppies are sold in pairs on the market, the essence of our work was not a mono aquaculture model in which advantageous sex is preferred, but rather a comparison of mixed cultures with males and females grown separately.…”

Effect of 17α-methyl testosterone on sex reversal and growth performance of Nile tilapia,Oreochromis niloticus

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