thing , ▁j abb ing , ▁and ▁dig ging . ▁ ▁The ▁amount ▁of ▁food ▁available ▁and ▁the ▁behav iors ▁of ▁other ▁individuals ▁in ▁the ▁school ▁influence ▁which ▁behavior ▁is ▁chosen . ▁ ▁All ▁behav iors ▁involve ▁sk imming ▁the ▁bottom ▁of ▁the ▁water ▁source ▁in ▁search ▁for ▁food . ▁Silver j aw ▁min n ows ▁are ▁select ive ▁feed ers , ▁only ▁feed ing ▁on ▁less ▁than ▁ 5 0 % ▁of ▁b enth os ▁organ isms . ▁ ▁They ▁determine ▁what ▁food ▁to ▁consume ▁through ▁taste ▁and ▁tact ile ▁sens es . ▁ ▁Re production ▁and ▁life ▁cycle ▁ ▁Silver j aw ▁min n ows ▁have ▁a ▁typical ▁life ▁span ▁of ▁three ▁to ▁four ▁years . ▁ ▁E gg s ▁h atch ▁between ▁late ▁spring ▁and ▁late ▁summer . ▁ ▁G row th ▁of ▁fish ▁in ▁their ▁second ▁and ▁third ▁sum mers ▁occurs ▁from ▁May ▁or ▁June ▁to ▁the ▁end ▁of ▁July . ▁ ▁G row th ▁stops ▁during ▁the ▁fall ▁and ▁winter ▁months ▁due ▁to ▁a ▁slow ed ▁met abol ic ▁rate . ▁ ▁Sex ual ▁m atur ity ▁is ▁obtained ▁late ▁in ▁their ▁first ▁summer ▁or ▁in ▁their ▁second ▁summer . ▁Ad ult s ▁typically ▁spawn ▁in ▁mid - spring , ▁but ▁sp aw ning ▁occurs ▁in ▁July ▁for ▁the ▁previous ▁year ' s ▁off spring . ▁ ▁E gg s ▁are ▁scattered ▁along ▁the ▁bottom ▁substr ate . ▁ ▁Import ance ▁to ▁humans ▁ ▁The ▁fish ing ▁industry ▁econom ically ▁prof its ▁from ▁min n ows ▁as ▁a