ADAMS: LIFE HISTORY PATTERNS IN MARINE FISHES 



Table l .—Summary of hypothetical r and K correlates in life 

 history parameters of fishes. 



Characteristics 



r selected 



K selected 



Body size. L x' 

 Maximum age 

 Age at first maturity 

 Natural mortality, M 

 Growtti rate./t' 



Small 

 Low 

 Low 

 High 

 High 



Large 



High 



High 



Low 



Low 



'The parameter from the von Bertalanffy growth equation was used to 

 represent the actual characteristic. 



Table 2. — Predicted signs of correlation matrix of life history 

 parameters in fishes. 



Characteristics 



Maximum 

 L rJ age 



Age at 



first 

 maturity 



M 



Body size, L J 

 Maximum age 

 Age at first maturity 

 Natural mortality, M 

 Growth rate, h' 



1.0 



1.0 



+ 

 + 

 1.0 



1.0 



+ 

 1.0 



'The parameter from the von Bertalanffy growth equation was used to 

 represent the actual characteristic. 



from a continuous bivariate population (Hollan- 

 der and Wolfe 1973). 



RESULTS 



Life history parameters were gathered from the 

 literature for several major groups of marine 

 fishes. Often there were multiple sets of data for 

 the same species from different locations. Each set 

 of values was used as a separate data case. The 

 literature citations for the actual parameters are 

 listed by group in Appendix I. Correlation ma- 

 trices were calculated for the following groups of 

 fish: 1) herring and anchovies, Clupeidae and En- 

 graulidae (Table 3), 2) salmons, Salmonidae (Ta- 

 ble 4), 3) cods, Gadidae (Table 5), 4) rockfishes, 



Table 3. — Correlation coefficients between life-history 

 parameters for herring and anchovies (families Clupeidae and 

 Engraulidae). For sources of data see Appendix I. The number in 

 parentheses represents the significance value for that particular 

 coefficient since the number of data cases was different for each 

 correlation. 



Age at 



Table 4. — Correlation matrix between life-history parameters 

 for salmons (family Salmonidae). For sources of data see Appen- 

 dix I. The number in parentheses represents the significance 

 value for that particular coefficient since the number of data 

 cases was different for each correlation. 



Characteristics 



L-x' 



Maximum 

 age 



Age at 



first 

 maturity 



M 



Body size.Lx' 

 Maximum age 

 Age at first maturity 

 Natural mortality, M 

 Growth rate,/(' 



10 



'The parameter from the von Bertalanffy growth equation was used to 

 represent the actual characteristic. 



Table 5. — Correlation matrix between life-history parameters 

 for cods ( family Gadidae) . For sources of data see Appendix I. The 

 number in parentheses represents the significance value for that 

 particular coefficient since the number of data cases was differ- 

 ent for each correlation. 



'The parameter from the von Bertalanffy growth equation was used to 

 represent the actual characteristic. 



Scorpaenidae, genus Sebastodes (Table 6), and 5) 

 flatfishes, Pleuronectiformes (Table 7). 



All of the observed correlations agree with the 

 predicted correlations in sign (Table 8). Of the 

 observed correlations, 40 of a possible 46 (or 87%) 

 were significantly different from zero at a 5% 

 probability level. If the observed correlation 

 agreement of coefficients were distributed ran- 



TABLE 6. — Correlation matrix between life-history parameters 

 for rockfishes (family Scorpaenidae, genus Sebastodes). For 

 sources of data see Appendix I. The number in parentheses 

 represents the significance value for that particular coefficient 

 since the number of data cases was different for each correlation. 



'The parameter from the von Bertalanffy growth equation was used to 

 represent the actual characteristic. 



'The parameter from the von Bertalanffy growth equation was used to 

 represent the actual characteristic. 



