JOHNSON and BARNETT: CORRELATION BETWEEN CHARACTERS AND FOOD SUPPLY 



Table l.-Computation of rank-sum index of productivity. This 

 table was produced by reproducing the contours or values 

 presented by each of the authors cited in the text for each of the 

 three measures of productivity-net primary production (NET), 

 zooplankton concentration (ZOO), and phosphate phosphorus 

 concentration (P04-P)-within the geographic Hmits of each of 

 the eight areas and then ranking the eight areas with respect to 

 one another for each measure. 



Area 



NET 

 rank 



ZOO 

 rank 



PO,-P 



rank 



Sum of 

 ranks 



Rank-sum 



w. 



0.85, P<0.01 



'Data from Brinton (pars, commun.) 



tropical Pacific, 2) Gulf of Guinea, 3) South China 

 Sea, 4) central equatorial Pacific, 5) western equa- 

 torial Pacific, 6) Philippine Sea, 7) central North 

 Atlantic, and 8) central North Pacific. In es- 

 tablishing the relationship between meristic 

 counts and productivity we have compared central 

 values of meristic counts with this rank-index 

 value for productivity. 



RESULTS 

 Diplophos taenia Giinther 



Diplophos taenia, a circumtropical mesopelagic 

 gonostomatid, is the only species included in this 

 study to occur in all eight study areas. Results for 

 counts of anal fin rays, LLP photophores, and 

 IPVALA photophores are illustrated in Figure 2. 

 In nearly all cases counts are highest in areas of 

 lowest productivity, lowest in areas of highest 

 productivity, and intermediate in areas of inter- 

 mediate productivity. Agreement between mean 

 values for photophore row segments in terms of 

 rank order by area, e.g. all four segments in the IC 

 row, is highly significant {W^^^ = 0.81, P <0.01, 

 Table 2), as is the agreement between mean values 

 for anal fin rays, LLP photophores, and IPVALA 

 photophores (W^^ = 0.94, P< 0.01, Table 3). This 

 concordance allows computation of a rank-sum in- 

 dex for mean values of meristic counts (Table 3). 



There exists no significant correlation between 

 the observed meristic variation and temperature 

 over the six Pacific areas (taug = 0.13, P >0.20, 

 Table 4). Temperature data was taken from a 

 chart of temperature at 100 m in the Pacific Ocean 



SCS-11 



GG 



CEP 



WEP 



PS 



CNA 



CNP 



-J I 1 L. 



ANAL 



ETP 

 SOS 

 GG 

 CEP 

 WEP 

 PS 



CNA-13 



30 

 5 

 3 

 -39 

 8 

 8 



_1 I I I I I I I I l_ 



94 9 



LLP 



ETP-68 

 SOS -1 



GG 

 CEP 



I 



CNA -20 

 CNP-29 



=:_L 



_I I I I L_ 



-J I J L. 



-I I ] I U 



-J I l_ 



134 136 138 140 142 144 146 146 



ISO 152 154 156 



IPVALA 



Figure 2.-Diplophos taenia. Comparison of mean (vertical line), 

 95% confidence limits for the mean (closed bar), one standard 

 deviation on either side of the mean (open bar plus closed bar), 

 and range (horizontal line) for anal fin rays (top), LLP pho- 

 tophores (middle), and IPVALA photophores (bottom) for 

 specimens from eight study areas (Figure 1). Numbers on or- 

 dinate are number of specimens examined. 



Table 2.-Agreement between segments of IC row of pho- 

 tophores in Diplophos taenia. Values are given as mean)rank. 

 Number of specimens (n) is given for counts of IP and represent 

 the minimum number of specimens counted for each character 

 for each area. 



287 



