The distribution of snout-vent frequencies suggest that the popu- 

 lationf^f^ladesh are severely stressed if ^^"^^^^"^12 

 , Zk! Tf vhl Tndian tx»ulations are characteristic of the species. 

 iK?1?e1aSlaShrpS^S?ions represent a geographic variant not con- 

 SScifiS wiS those oflndia is iitplausible should snout-vent length be 

 considered a prinary criterion. 



Postnetanorphic growth.-Ohe growth rates °f5ana|i2gDa under 

 natural and under laboratory conditions are unknown. The mean size 

 SS frSuencies of the populations obtained in May and June do not 



ibi:^t^%-if?^^^^^^^ Se;^Ti2:.r| ^y 



S^e skived two growth-seasons. Individuals ^^ Josser snout-vent 

 length are possibly recruits of the previous growth-season. 



Base line data on this extrenely important aspect °fthe biology 

 of Ranatiqrina are urgently required. It is certainly possible that 

 aro^riteT^rTwithin the dStricts of Bangladesh according to the 

 S^ ^a^Ze of rainfall, availability of food, intensity of 

 predation and extremes of teirperature. 



SIZE AND TEM>ORAL DISTRIBUTION OF GRAVID FEMALES 

 a^,e ovaries of all females in the population ^^f ^^^^^^^'^ 

 Sis? r^tSroiS,lL7n^^r^ lT^r'^l^s^'^£'^^^ 



^^:^^^^Z.^f^^^ l-siar4,Te;STo"SS'rSr-- 



ing, oviducts greatly enlarged). 



Gravid fenales cotprise a significant Preponderance of all females 

 in the^ilation sanples examined between 16 May 1982 and 29 June 1982. 

 93.57%,%% (5, 6, 9 June), 91.66%, 84.11%, 97.87% and 85.71% 

 (Table 1). 



Gravid females are present in the 71-80 "^ij!;^^°^^'i?;3t3b- 

 161-170 nm size-cohort and all intervening size-cohorts^ It ^s estab- 

 lished, therefore, that individuals between 71-80 nm and 161-170 itm 

 snout-vent length are reproductively mature. 



The frecn^ncies of gravid females larger than and smaller than the 

 nean sS-SSS of each ^ulation examined decline correlatiyely wrth 

 ^decrJaS of snout-venffreq^^ncies. Except for the population ^ 



StnS S^Se 1982 (141-150 lan) , the -f^xIfo^'^S-? o'^^ 

 arrong the population sanples vary from 111-120 itm, 121 130 ran ana 



91-100 ran. 



