FISH CUI.TURE 



I5OI 



(i) I gtn. = 0.035 oz. = 0.56 drachms. 



Table IV. — Number of eggs produced by roach, ruffe, 

 and Chondrostoma nasus. 



begun to spawn before they were captured, the experiments were reptated 

 using perch {Perca fluviatilis). Females just about to spawn were killed and 

 weighed. Their ovaries were removed, part of each was dissected, the ova 

 were counted and accurately weighed. The weight of the whole o^'ar^• 

 was likewise determined and from this, the number of eggs in each fish 

 was calculated. The results are given in Table III 'and confirm those ob- 

 tained in the ])revious experiments. 



A few relevant figures for roach {Leuciscus rutilus) for Chondrostoma 

 nasus, and for the ruffe {Acerina cerniua) are appended iu'Table IV. 



