Agriculture - - Research -

MUS­SEL PRO­DUC­TION in the Philip­pines is fac­ing a chal­lenge: the in­suf­fi­cient sup­ply of seed stock.

To ad­dress the prob­lem of low pro­duc­tion of mus­sel spats, the Depart­ment of Sci­ence and Tech­nol­ogy (DOST), through the Philip­pine Coun­cil for Agri­cul­ture, Aquatic and Nat­u­ral Re­sources Re­search and De­vel­op­ment (PCAARRD), funded the Mus­sel Hatch­ery Project. The project, which was im­ple­mented by the Univer­sity of the Philip­pines Visayas (UPV) in Miag-ao, Iloilo, aimed to de­velop tech­nolo­gies to en­sure a re­li­able sup­ply of mus­sel spats for grow-out op­er­a­tion.

Fol­low­ing the method es­tab­lished by the project, trans­port of brood­stock from the nat­u­ral mus­sel ground to the UPV hatch­ery, which takes seven to 36 hours af­ter har­vest, at­tained high sur­vival rate of 98%.

The “warm wa­ter spawn­ing tech­nique” was also em­ployed and had con­sis­tently ex­hib­ited good re­sults. This tech­nique uses ther­mal shock, which pro­gres­sively heats the wa­ter up to 35OC or through repet­i­tive tem­per­a­ture changes.

Tran­si­tion­ing from “D-hinged” to “early spat” stage of about 1 mm pro­vided more than 4% sur­vival rate, which was higher than that ob­tained in other Asian coun­tries, with only 1 to 2%. D-hinged is the 4th stage in mus­sel de­vel­op­ment that oc­curs on the 24th to 48th hour af­ter fer­til­iza­tion. The spent spawn­ers, which is char­ac­ter­ized by an empty go­nad or with few ga­metes left in its go­nadal sac on its ma­tured stage, were re­ma­tured by re­stock­ing them in the nat­u­ral en­vi­ron­ment.

Mus­sel farm­ers, en­trepreneurs, ven­dors, mid­dle­men, pro­ces­sors, re­searchers, tech­ni­cians, ex­ten­sion work­ers, pol­icy mak­ers, and con­sumers are set to ben­e­fit from this project. (DR. MARY JANE A. AMAR, PCAARRD FARMNEWS)

Mass pro­duc­tion of green mus­sel spats in con­crete and fiber­glass tanks.

Early spats of green mus­sel (>1 mm) at­tached to the ny­lon nets and oys­ter cultch as sub­strates. While ar­rows are point­ing at mus­sel spats.

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