GENERAL LIFE HISTORY OF THE TADPOLES 



25 



that tadpole life in Dagger Lane Pond pursues a more placid course 

 than in some of the other ponds, and may serve as a background to the 

 more dramatic episodes that have been seen elsewhere. 



Dagger Lane Pond 



[a) 1947 (Fig. 5). The winter of 1947 was severe and long, and it was 

 followed by floods that left the ponds full of water at the beginning of 



10 20 30 



APRIL 



O 20 SO 

 MAY 



19 29 

 JUNE 



9 19 



JULY 



Fig. 5. Dagger Lane Pond, 1947 



The growth of tadpoles at three different places in the pond. Note that 

 growth almost ceased between 21st May and the end of June. 



the spawning season. About fifty clumps of spawn were laid in the 

 pond just before 6th April. They had been deposited on the top of a 

 floating patch of Star wort (Calhtriche), a position which frogs some- 

 times prefer to the more usual places, the shallow margins of the pond. 



3— (T.914) 



