24 January 2008

How to get all males by the simple method

Cara sederhana mendapatkan nila jantan. When you read this article, maybe you ask, why do we get male ? Doesn’t female also can be cultivated, sold, and eaten by the people ? Yes. Female can be cultivated, sold, and eaten by the people, but male is better than female. Male more profitable than female. Why ?

First, male growth faster than female, because in their life, male only produce sperms, whereas female produce eggs. Energy for producing eggs is greater than producing sperms. Rest energy used for growing by males. In six months, male can be reach 300 gram, whereas female only 250 gram.

Second, male is bigger than female. In Indonesia, male can be reach more than 3 kg, whereas female only 2 kg. In Africa male can be reach more than 5 kg, whereas female only 4 kg.

Three, males have rendement (meat numbers) 20 percents greater than female. Male is better if made fillet than female. Because male has space in their stomach is wider female. Only for sperms, secretion, and other organs. Whereas, female beside for secretion, and other organ, also for eggs.

Fourth, male more responsive to artificial feed than female. Baecause its move lively to catch feeds to step a side female. Besiide that, male don’t stop in feeding. Whereas, female will stop in feedeing, especially when female to sit on eggs.

Fiveth, male more tollerant to environment, and diseases attack than female. Otomaticaly, male survival rate is higher than female.

Generally, to get male by change sex, or named sex reversal. But that method is very difficult, and need skill, time, and high cost. Selection is simple method to get male, that is by sepparating 2/3 of populations. Better only ½ of population. Its reason, that in a population of tilapia, 2/3 are males. (see in order to get fingerling in one size). By this method, you don't obliged use cost.