GoDBY. — GroirtJi of B 



rou'ii 



Trout in Canftrhur>i. 



55 



The average age — 6-93 last winter or 7-93 at next spawning — is again 

 high — higher than Marymere. 



Lake Alexandrina — This lake contains some very large fish, and the 

 average size is certainly greater than in either of the last two lakes. Unfor- 

 tunately, I have been able to obtain scales from only two fish ; the figures 

 for these are shown in Table IV (C). 



Lake Coleridge. — This lake was first stocked with brown trout in 1868, 

 and has for many years been noted for the exceptionally large size of its 

 trout. I have been able to obtain scales from three fish only from this 

 lake, but two of them are so remarkable that I have included a photograph 

 of a scale from each fish. Plate VI, fig. 1, shows a scale from a fish of 

 10| lb. captured about the 5th November, 1917. The length of the fish was 

 not supplied to me, but would probably be about 27i in., and I have made 

 my calculations on this assumjition. The fish seems to have been three 

 years old in the winter of 1917, and shows a most remarkable growth since 

 the last winter. The figures for each year are as follows : — 



Winters 



Inches 



15f 



This scale apparently belongs to the Marymere type, and the fish was 

 probably bred in the lake. It is considerably larger than any three-year- 

 old I have ever heard of. The second fish was captured on the 10th March, 

 1918. A photograph of one of these scales is shown in Plate VI, fig. 2. The 

 fish weighed 17 lb. and measured 34| in. in length. The scales are, I think, 

 the most beautifully marked and at the same time the most interesting in 

 my collection. Surrounding the centre of growth are four winter bands 

 close together, denoting four years of poor growth. These are followed by 

 a year of growth which, so far as I know, is cjuite unique. There is another 

 year of good growth, and then two years of moderate growth. The last 

 winter band is right at the edge of the scale, and it is perhaps open to 

 question whether this represents the winter of 1917 or the beginning of the 

 1918 winter. The difficulty of reading the scale is increased by the fact 

 that every scale is more or less broken or worn at the edge. The fish was 

 an egg-bound female, and in this abnormal state it is unlikely that she 

 would grow much. On the whole, I think it more probable that the winter 

 band right at the edge of the scale represents the winter 1917, and that 

 there has been practically no growth since then (represented by one or two 

 rings only), and that the fish was going back in condition when caught, as 

 is evidenced by the frayed lateral edges of the scale. On this assumption 

 the figures are as follows : — 



The individual growth-curves for these two fish are shown in fig. 8. It 

 is a fortunate coincidence that in three fish from this lake I should have 



