hat
Teknik done ki pòv lan konte sou rapò gwosè echantiyonal yo pou evalye kantite fre yo ap pase e konbyen lajan ase. Nan pi fondamantal li yo, teknik la sèvi ak de moso nan done lokal yo, gwosè nan pwason ak matirite nan pwason, konbine avèk enfòmasyon ki egziste deja byolojik, yo pwodwi yon rapò nan chòk fre potansyèl. Kòm yon règ jeneral, si pwason ka reyalize omwen X% nan natirèl tout lavi yo fre, yon lapèch ka kenbe tèt li. Mwens ke sa ak lapèch la ap deperi. Pandan ke 20% se nimewo a minimòm, syantis espere wè lapèch akonplisman 20 – 30% nan chòk fre natirèl. Rezilta yo nan Palau yo te inkyétant, ki montre ke X% nan trape pwason yo te jivenil, akonplisman jis NAN-NAN% nan fre sou tout lavi yo. Konsekans sa a te klè: si pifò pwason yo pa repwodwi, nan yon ti tan pa pwal gen plis pwason.
eng
The data-poor technique relies on sample size ratios to assess how much spawning is happening and how much is enough. At its most basic, the technique uses two pieces of local data, size of fish and maturity of fish, combined with existing biological information, to produce a ratio of spawning potential. As a general rule, if fish can achieve at least 20% of their natural lifetime spawning, a fishery can sustain itself. Less than that and the fishery will decline. While 20% is the minimum number, scientists hope to see fisheries achieving 30–50% of natural spawning. The findings in Palau were worrisome, showing that 60% of fish catch were juvenile, achieving just 3–5% of their lifetime spawning. The consequences of this were clear: if most fish are not reproducing, in a short time there will be no more fish.