2 spa wning usua lly 3 yr s older a t 1 to 4 lbs for

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Unformatted text preview: nd ma y pulsa te. 2) Spa wning (usua lly 3 yr s & older a t 1 to 4 lbs) - for fish in a na tur a l setting (nor ma l, not- fa r med fish) this is the ter m for deposition of eggs by the fema le a nd the insemina tion of eggs by the ma le, tha t is - ma ting. In na tur e, c a tfish spa wn fr om Apr il to July, ma les a nd fema les pa ir , ma le builds a ' nest' , fema le deposits a lyer s of eggs for ma le to fer tiliz e exter na lly (pr oc ess la sts fr om 4 to 12 hour s), ma le dr ives a wa y fema le a nd gua r ds nest. In ponds, most c ommer c ia l fa r mer s let na tur e do the job. Put equa l number of ma les a nd fema les together (50 to 300 per ha ), pr ovide nesting c onta iner s (old milk c a ns), ha r vest fr y. 3) F r y - eggs ha tc h 5 to 10 da ys a fter fer tiliz a tion, move to nur ser y pond for 2 to 3 wks fed finely gr oud diet, tr a nsfer to gr owing pond fed a t 4 to 5% of tota l pond weight; ma r ket finger lings 180 da ys la ter a t 13 c m length a nd 14 g wt. Stoc king a ppr...
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