Potasiyumu ihinduka(PDF) ni umunyu wahujwe wakoreshejwe nk'inyongeramusaruro idafite antibiyotike mu guteza imbere iterambere ry'amatungo. Ariko, ubushakashatsi buke cyane bwakozwe ku moko yo mu mazi, kandi ingaruka zawo ziravuguruzanya.

Ubushakashatsi bwakozwe mbere ku ifi ya salmon yo mu nyanja ya Atlantike bwagaragaje ko indyo irimo ifu y’amafi yavuwe na PDF ya 1.4v yatumye ibiryo birushaho kuba byiza kandi bikanatera imbere. Ibisubizo bishingiye ku ikura ry’inyama zo mu bwoko bwa tilapia zivanze byagaragaje kandi ko kongeramo PDF ya 0.2 ku ijana mu ndyo z’igerageza byongera cyane ikura n’ubushobozi bw’ibiryo, kandi bikagabanya ubwandu bwa bagiteri.

Mu buryo bunyuranye n'ubwo, inyigo yakozwe ku mafi yo mu bwoko bwa tilapia y’inkoko y’ubwoko bwa hybrid yagaragaje ko kongera PDF kugeza kuri 1.2% by'indyo bitagaragaje iterambere mu mikurire, nubwo bigabanya cyane bagiteri zo mu mara. Hashingiwe ku makuru make ahari, akamaro ka PDF mu mikurire y'amafi asa n'aho atandukanye bitewe n'ubwoko, igihe cy'ubuzima, urwego rw'inyongera ya PDF, uburyo bwo gupima n'imiterere y'imikurire.

Igishushanyo mbonera cy'igerageza

yakoze igerageza ry’imikurire mu kigo cy’inyanja cya Hawaii muri Amerika, kugira ngo isuzume ingaruka za PDF ku mikurire n’uburyo isambaza z’umweru zo mu nyanja ya Pacific zihingwa mu mazi meza. Yatewe inkunga na Minisiteri y’Ubuhinzi ya Amerika ishinzwe ubushakashatsi ku buhinzi no ku masezerano y’ubufatanye na Kaminuza ya Alaska Fairbanks.

Isambaza z'umweru z'abana bo mu Nyanja ya Pasifika (Litopenaeus vannamei) zatewe mu buryo bw’amazi meza yo mu nzu afite umunyu wa 31 ppt n’ubushyuhe bwa dogere selisiyusi 25. Bagaburiwe indyo esheshatu zo gupima zifite 35% bya poroteyine na 6% bya lipide birimo PDF kuri 0, 0.3, 0.6, 1.2 cyangwa 1.5%.

Kuri buri garama 100, indyo y'ibanze yakozwe ikubiyemo garama 30.0 z'ifu ya soya, garama 15.0 z'ifu ya pollock, garama 6.0 z'ifu ya squid, garama 2.0 z'amavuta ya menhaden, garama 2.0 z'isoya lecithin, garama 33.8 z'ingano zuzuye, garama 1.0 z'imyuka ya chromium na garama 11.2 z'ibindi bintu (harimo imyunyu ngugu na vitamine). Kuri buri ndyo, ibigega bine bya litiro 52 byashyizwemo isambaza 12 ku gikombe. Hamwe n'uburemere bwa garama 0.84 z'umubiri, isambaza zagaburirwaga intoki inshuro enye ku munsi kugira ngo zihage mu gihe cy'ibyumweru umunani.

Mu igerageza ryo gusya neza, isambaza 120 zifite uburemere bwa garama 9 kugeza ku 10 zatewe muri buri tangi rya litiro 18,550 hamwe n'ibigega bitatu/uburyo bwo kuvura imirire. Oxyde ya chromium yakoreshejwe nk'ikimenyetso cy'imbere cyo gupima igipimo cy'igogora neza.

Ibisubizo

Inyongera y'ibiro bya shrimp buri cyumweru yari hagati ya garama 0.6 na 0.8 kandi yakundaga kwiyongera mu kuvura hakoreshejwe indyo ya PDF ya 1.2 na 1.5%, ariko ntabwo yari itandukanye cyane (P > 0.05) n'imirire. Kurokoka kw'shrimp kwari 97% cyangwa hejuru mu igerageza ry'imikurire.

Igipimo cyo guhindura ibiryo (FCR) cyari gisa ku ndyo aho PDF yari 0.3 na 0.6 ku ijana, kandi byombi byari biri hasi ugereranije na FCR ku ndyo ya PDF ya 1.2 ku ijana (P < 0.05). Ariko, FCR zo kugenzura, 1.2 na 1.5 ku ijana ku ndyo ya PDF zari zisa (P > 0.05).

Inyama z’inka zagaburirwaga indyo ya 1.2% zari zifite ubushobozi bwo kugogora buto (P < 0.05) ku bintu byumye, poroteyine n’ingufu zose ugereranyije n’inyama z’inka zagaburirwaga izindi ndyo (Ishusho ya 2). Icyakora, ubushobozi bwo kugogora ibinure mu ndyo ntibwagizweho ingaruka (P > 0.05) n’urwego rwa PDF.

Ibitekerezo

Ubu bushakashatsi bwagaragaje ko kongera PDF kugeza kuri 1.5% mu mirire bitagize ingaruka ku mikurire no ku mibereho y'isambaza zihingwa mu mazi meza. Ibi byagaragaye bisa n'ibyavumbuwe mbere kuri tilapia ntoya, ariko bitandukanye n'ibyavuye mu bushakashatsi ku salmon yo muri Atalantika no ku mikurire ya tilapia yo mu bwoko bwa hybrid.

Ingaruka za PDF ku mirire ku bijyanye na FCR no ku buryo igogorwa ry’ibiryo ryagaragaje ko muri ubu bushakashatsi hakoreshwa dose. Birashoboka ko FCR nyinshi ku gipimo cya 1.2% by’indyo ya PDF yatewe no kugabanuka guke kwa poroteyine, ibintu byumye n’ingufu nyinshi ku mirire. Hari amakuru make cyane ku ngaruka za PDF ku buryo intungamubiri zigogorwa mu binyabuzima byo mu mazi.

Ibisubizo by'ubu bushakashatsi byari bitandukanye n'ibyavuye muri raporo yabanjirije iyi yavugaga ko kongeramo PDF mu ifu y'amafi mu gihe cyo kubika mbere yo gutunganya ibiryo byongeraga igogora rya poroteyine. Ingufu zitandukanye za PDF mu mirire zabonetse mu bushakashatsi buriho n'ubwabanje zishobora kuba zaratewe n'imimerere itandukanye, nko gupima ubwoko bw'ibimera, uburyo bwo korora, uburyo bwo kubyaza umusaruro indyo cyangwa izindi mimerere yo kugerageza. Impamvu nyayo y'iri tandukaniro ntabwo yari isobanutse neza kandi isaba iperereza ryinshi.