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than:- in' the: first ha~.l statistically, the' ~riol~ogcal sig~ifi~can~e <br />is probably- less::p~ofo~d. <br />An a-lternative wad of lool~ng:~ at species co~pasiti~on aid <br />relative: abLmdance . is. with t~ .use - of a diversity index:- ~~te: used -fin <br />index- developed- by Keefe:- aad: 8ergersen: (Ig~9) .. This- ine~ex :takes <br />into acco~~~t the number-- o-€- di-€€e•~e t~ din this ~~~, ~ eeies } <br />as well. as~ their di.s~rrbtrt=on.. Values. range- from- Q: to l; with <br />higher values- indicati greater €~iversit~r.. Table 3 gives the <br />values ~anci: -level of s.gaifi:can~ tor- each trip . . In ~ eac~~ case, <br />diversity eras ~ signifiea~rtl~t Higher-.._~. <- _~D2) in total .tharz 3n- the <br />first hauls, because- this test is sensitive to rare taxa. -The <br />diversity index :for .the- last. two~'trgs is~ very low because most of <br />the fish were ~ pooled _ Ito: the- ~TN~' : category. In general ~ tie ~ les s <br />fre~c~uently a~ species:, was coll-e~ted, t3~ mare often it was ~fs`sed in <br />the first gas:s= (Figure ~ . <br />Table 3 : Dversit~r : i.~tde~€ val~~es. far back rater ~ab:ta~s, <br />Green :ate. ~olorat~x fivers, 3:994-139`5.. <br />.JTa~ Pas~.~ 'Fbt~al z-.ua:3.~* <br />~ ri.l 35~ . E~:f3~ . Q05 ~ 3'_ 2 <br />~s.gnificant to. .=-.~,~<-leve> i€ z . 1.96 <br />