NOTE Edwards and Perkins: Detecting linear trends in dolphin abundance 



627 



Z 

 I 



a. 



_i 



O 



Q 

 LL 



o 



CO 



< 

 O 



Northern Offshore Spotted 



1976 1978 1980 1982 1984 1986 1988 



8. 



Southern Offshore 

 Spotted 



1976 1978 1980 1982 1984 1986 1988 



Eastern Spinner 



1976 1978 1980 1982 1984 1986 1988 



Northern Whitebelly Spinner 



1976 1978 1980 1982 1984 1986 



Southern Whitebeliy/Spinner 



/ 



\ 



1976 1978 1980 1982 1984 1986 1988 



Northern Common 



1976 1978 1980 1982 1984 1986 1988 



Central Common 



1976 1978 1980 1982 1984 1986 1988 



Southern Common 



\^ 



1976 1978 1980 1982 1984 1986 1988 



YEAR 



Figure 1 



Estimated abundances (dashed line) of dolphins bounded by 1 bootstrap standard error (solid lines). Years for which 

 no estimates were reported are omitted; estimates for 1983 are omitted as anomalous. 



