246 Pandalus Spawning Season; Comparisons with Crangon. 



The numbers of eggs in the pink shrimp are relatively 

 somewhat fewer than in the brown species. Their pale, 

 emerald-green colour, w r hen ripe, is in marked contrast to the 

 amber tint of the latfcer's abdominal eggs. Moreover, in 

 the " pinks " they are carried more in a shorter, deepish, 

 but laterally compressed bunch than is the case in the wider- 

 bodied " browns." On escape from the egg, the young undergo 

 changes or metamorphoses, and an after-development in most 

 respects resembling that of the common shrimp already 

 adverted to. 



From his long experience, B. Johnson, sen., arrives at the 

 conclusion that the Pink Shrimp (P. annulicornis) has only one 

 continuous spawning season, terminating somewhat abruptly in 

 the spring. This, according to him, commences about November 

 or December, and continues on to March and April. Scarcely 

 any or none are berried during the summer months, when the 

 brown shrimp is then at its maximum breeding season. Our 

 own observations confirm the above. With moderate seasons 

 even towards mid- October we have failed to find the Pink 

 Shrimps with eggs on the swimmerets, though the ovary has 

 shown ample signs of advancement. By mid-November or 

 after, a small per centage would be berried, such shrimps being 

 only of medium size; as often, with a depression of temperature, 

 the older ones with incubating eggs hasten off to sea. Usually 

 in December, January and early February " pinks " are 

 conspicuous by their absence. Their condition in North Sea 

 residence is problematical until their influx, nearly ripe-egged, 

 at the close of February and early March. Then quickly 

 follows escape of brood, and May sees the end of the hatching 

 process until the November following. 



A Summary and Comparison. 



(a) The Pink (Red or Shank) Shrimp {Pandalus) is with us 

 decidedly a North Sea or off-shore form, of wandering habit, 

 seldom passing beyond salt-water range in estuaries, with 

 partiality for hummocky sand, rough boulder or rocky grounds, 

 showing a preference for worm diet, commonly resident where 



