512 Memoir Sears Foundation for Marine Research 



Table V. Averages (in pounds) Showing the Relationship between Length and Weight 

 of Arctic Charr from Northern North America and Spitsbergen 



r ^ Weight (lb) ^ 



Length (mm) Frobisher Bay Northeastern Western Southern 



Baffin Islandf Labradorff Hudson Bay* Spitsbergen** 



250-295 0.5 - - - 



300-345 0.6 



350-395 i-i 1-5 1-5 1-5 



400-445 1.7 1.9 2.4 2.2 



450-495 2-4 2.7 3.3 3.3 



500-545 3-3 3-8 375 3-5 



550-595 44 5-1 5-2 4-8 



600-645 5-8 77 7-0 5.5 



650-695 7,2 6.9a 8.3a - 



700-745 8.4 - - 8.8 



750-795 10.2 - 1 1.7 - 



t Grainger, 28: 351. ft Andrews and Lear, 2: 853, tab. 7. * Sprules, 62: 6, tab. I. ** Dahl, 11: 6. 

 a One fish only. 



dor, and of Spitsbergen average slightly heavier at equal lengths than those of Baffin 

 Island. The general run, as caught, is reported as averaging about 4.3 pounds for 

 the northwestern coast of Hudson Bay, with ^6 "j^ of the catch falling between 3—4 

 pounds. In Ungava Bay, the most common size is between 2—8 pounds. For southern 

 Baffin Island the average is about 2,-S pounds. The bulk of the catch for northeastern 

 Labrador runs from a pound or two up to eight or even ten pounds per fish; 

 spawning fish in poor condition, caught in a brook tributary to Anatalek Bay, weighed 

 close to five pounds. Most of the western Greenland fish weigh between 5.5-7.7 pounds. 



The maximum weights (in pounds) that I have found reliably recorded have 

 been 16 (7.3 kilo) for Hudson Bay; 9 for the south coast of Baffin Island and 11.9 

 for Frobisher Bay; 10 for northeastern Labrador; 8.5 for western Greenland; and 8.8 

 (4 kilo) for Novaya Zemlya. However, occasional alpinus grow much larger than the 

 majority; specimens of 20 and even 26 pounds have been reported for the north- 

 western Hudson Bay area (62: 5; J5: 24), and a giant of 35 pounds (16 kilo) has been 

 reported for southern Novaya Zemlya (Yessipov, ']()'. 70), though not on wholly con- 

 clusive evidence. 



Development and Rate of Growth. The young fry under hatchery conditions have 

 been reported as averaging about 17 mm in length at hatching. At room temperature 

 (at Ostanback, Sweden) they averaged 27 mm after 19 days, a rate of growth no doubt 

 more rapid than that for "wild" fish exposed to considerably lower temperatures in 

 nature; for example, Nystrom reported that fry artificially hatched in January in 

 Sweden grew so slowly thereafter in the cold spring-fed fish ponds that they were 

 only a little more than an inch (about 25 mm) long the following August {in 61 : 847). 

 Average lengths for hatchery fish have been reported as 97 mm at the end of their 

 first year, 123 mm at the end of their second year, and 137—216 mm at the end of 

 their third year {61: 847). These lengths seem somewhat greater (thanks to warmer 



