274 



departure only 14.1 per cent. I know of no test of similar ex- 

 tent elsewhere with which this may be compared, but its range 

 is well within the limits of the records of repeated catches in 



TEN CONSECUTIVE CATCHES FROM ANCHORED BOAT. 



No. 



Vol. of catch 

 in cm. 3 per in. 3 



Departure from average 



In volume 



In percentage 



i 



3.20 



+ -07 



+2.2 



2 



3-24 



+ -ii 



+3-4 



3 



3.°4 



- .09 



-2.9 



4 



3-40 



+ -27 



+8 6 



5 



3.06 



- .07 



-2.3 



6 



3.20 



+ -07 



+2.2 



7 



2.94 



- -19 



-5-5 



8 



3.20 



+ -07 



+2.2 



9 



2.94 



- -IQ 



-5-5 



10 



3.10 



- -03 



— 1 . 



Average 



3-13 



+ .112 



+3-58 



Greatest + 





+ -27 



+8.6 



Greatest — 





- -19 



-5-5 



DEPARTURES FROM MEAN CATCH COMPUTED FROM HAULS FROM EQUAL DEPTH 

 IN GERMAN LAKES BY APSTEIN ('96, pp. 56-57). 



Ap- 



No. 



Average catch 



Average depar- 



Limits of depar- 



Total 



stein's 



of 





ture from mean 



tures of percent- 



range of 



No. 



hauls 



in cm.' 



in per cent. 



ages. 



departure 



23 b-d 



3 



4.66 



2.2 



- 3-4 to + 3 



6.4 



2b a-c 



3 



5-5 



6.1 



- 9.1 " + 9.1 



18.2 



27 a-e 



5 



4-i 



7-8 



-14.6 " +15.9 



30.5 



28 a,b 



2 



4-5 



n . 1 



— 11. 1 " +11. 1 



22.2 



30 a,b 



2 



9.12 



'•3 



- 1.3 " + J -3 



2.6 



32 a-c 



3 



13-2 



4-3 



- 5-3 " + 6-i 



11.4 



33 a . b 



2 



26.3 



6.4 



- 6.7 " + 6.7 



13-3 



33 d > e 



2 



15-5 



3-2 



- 3-2 " + 3-2 



6.4 



34 a,b 



2 



17- 



8.8 



- 8.8 " + 8.8 



17.6 



37 a " c 



3 



2.43 



8.6 



- 7-4 " +13-2 



20.6 



41 a,b 



2 



i-5 



13-3 



-13-3 " +J3-3 



26.7 



43 a -c 



3 



193 



19.5 



- 17. 1 " -29.5 



46.6 



46 a,b 



2 



2, 



0. 



0. 



0. 



65 a,e 



2 



3-3 



7-7 



- 7-7 " + 7-7 



15-4 



73 a.b 



2 



2-5 



0. 



0. 



0. 



45 a . b 



2 



1.2 



8-3 



- 8.3 " +8.3 



16.7 



47 b,c 



2 



I.I 



0. 



0. 



0. 



63 a.g 



2 



I.23 



2-5 



- 2.5 " + 2.5 



5- 



68 a,b 



2 



0.1 



0. 



0. 



0. 



69 a,b 



2 



— 0.1 



0. 



0. 



0. 



70 a,b 



2 



0.16 



0. 



0. 



0. 



24 a-c 



3 



I. 



0. 



0. 



0. 



83 a-c 



3 



1-13 



3-8 



— 2.7 " +6.1 



8.8 



