of the Fishery Board for Scothmd. 



163 



my experience at Dunbar in former years, when it was found that plaice 

 and dabs kept in small tanks lost weight in winter and gave up feeding.* 

 In tank No. 1, which contained as we have seen about 185'5 gallons 

 (842-5 litres), seven whitings, five codlings, one haddock, one common 

 dab, and one sand-eel were placed ; the latter soon disappeared, and was 

 probably eaten. The fish were measured on two occasions, (1) at an 

 interval of 100 days, and (2) after 155 days. It would, as it turned out, 

 have been better to have measured them more frequently, since, with the 

 exception of the sand-eel, all the fishes survived in this tank; but from the 

 mortality in the other tanks it was deemed advisable to disturb them as 

 little as possible. In measuring them, they were first transferred to 

 convenient dishes, seized cautiously with a loose cloth, and when laid on 

 the measuring board care was taken to free the under surface of the fish 

 from the cloth. A little practice made the process easy, the only forms 

 requiring extra care and promptness being the haddocks. In the 

 accompanying Table I give the particulars regarding these fourteen fishes 

 which were kept in water at the ordinary temperatures. 



Tank I. 







Mean Temperature 

 4-5° C. (401° F.). 



Mean Temperature 

 9-3° C. (48-7° F.). 



Mean Temp. 

 6-5° C. (43-7° F.). 







100 Days Later. 



55 Days Later. 



Increase in the 

 155 Days. 



Fish. 



Length. 









































Increase. 





Increase. 

























Mean 







Length. 



Total. 



IVXcciii 

 per 10 

 Days. 



Length. 



Total. 



per 10 

 Days. 



Total. 



per 10 

 Days. 



Whiting. 

 1 



Mm. 

 209 



Mm. 



226 



Mm. 

 17 



Mm. 

 1-7 



Mm. 



244 



Mm. 

 18 



Mm. 

 3-27 



Mm. 

 35 



Mm. 



2-26 



2 



170 



191 



21 



2-1 



210 



19 



3-45 



40 



2-58 



3 



160 



173 



13 



1-3 



187 



14 



2-18 



27 



1-74 



4 



157 



172 



15 



1*5 



181 



9 



1-64 



24 



1*55 



5 



152 



169 



17 



1-7 



178 



9 



1-64 



26 



1-68 



6 



152 



164 



12 



1-2 



177 



13 



2-36 



25 



1-61 



7 



142 



159 



17 



1-7 



174 



15 



2-73 



32 



2-06 



Average, 



163-14 



179-14 



16 



1*6 



193-0 



13-86 



2-52 



29-86 



1-93 



Codling. 

 1 



147 



185 



38 



3-8 



226 



41 



7-45 



79 



5-1 



2 



[143 



184 



41 



4-1 



200 



16 



2-9 



57 



3-7 



3 



132 



169 



37 



37 



208 



39 



7-09 



79 



4-9 



4 



129 



163 



34 



3-4 



200 



37 



6-73 



71 



4-58 



5 



123 



160 



37 



3-7 



194 



34 



6-18 



71 



4-58 



Average, «j 



134-8 



172-2 



37-4 



3-74 













132-7 



169-2 



36-5 



3-65 



207 



37-8 



6-87 



75-7 



4-88 



Haddock. 



183 



210 



27 



2-7 



238 



28 



5-1 



55-0 



3-55 



Common Dab. 



237 



243 



6 



0-6 



243 



o-o 





6 



0-04 



* Eleventh Annual Report Fishery Board for Scotland, Part III., p. 193. 



