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<br />i <br />GRANATH AND ESCH-REGULATION OF B. ACHEILOGNATHIPOPULATIONS 1119 <br />I <br />I <br />i <br /> <br />40 WATER TEMPERATURE (OC) <br /> <br />20 <br /> <br /> <br />30 <br /> <br />10 <br /> <br />100 <br /> <br />DEVELOPMENTAL STAGES (%) <br /> <br />80 <br /> <br /> <br />NONSEGMENTED- <br />SEGMENTED .......... <br />GRAVID ----- <br /> <br />60 <br /> <br />40 <br /> <br />20 <br /> <br />..... <br /> <br /> <br /> <br />......... <br /> <br />:.........." <br /> <br />............~. ....... <br /> <br />:..... <br /> <br />.... <br /> <br />o <br />M A M J J A SON D ~ F M A M J J A SON D J F M <br />1980 I 198 I 1982 <br />FIGURE 3, Seasonal changes in temperature an~ developmental stages of B. acheilognathi within G, affinis <br />from the ambient site, Each percent refers to the ~ercentage of the total infrapopulation of the cestode at that <br />stage of development, The horizontal bar indicatej when recruitment of the cestode occurred, <br /> <br />WATER TEMPERATURE (OC) <br /> <br />........................ <br /> <br />40 <br /> <br />30 <br />20 <br /> <br /> <br />10 <br /> <br />60 <br /> <br /> <br /> <br />100 <br /> <br />DEVELOPMENTAL STAGES <br /> <br />80 <br /> <br />....... <br />, . <br /> <br />, , <br />.: : <br />. . <br />. . <br />. . <br />. . <br />. . <br />. . <br />....... .. <br /> <br />:" .... <br /> <br /> <br />....../ \\....\ <br /> <br />NONSEGMENTED- <br />SEGMENTED .......... <br />GRAVID ----_ <br /> <br />.0 "0 <br /> <br />40 <br /> <br />20 <br /> <br />" <br />'. <br />.:: ..... <br />"0. 1.: <br />......oj <br /> <br />o <br /> <br />MAMJJ ASONDJFMAMJJA SOND JF M <br />1980 i 198 I 1982 <br /> <br />FIGURE 4, Seasonal changes in temperature an~ developmental stages of B, acheilognathi within G, affinis <br />from the thermally altered site, Each percent refer~ to the percentage of the total infrapopulation of the cestode <br />at that stage of development. The horizontal bar i?dicates when recruitment of the cestode occurred, <br />