102


 r = (InQt InQo)/t (19)



The growth equation represents the integration of rates of

food consumption, recruitment, migration, respiration, and

mortal ity.

 Total standing stocks of the different species were

estimated by multiplying the grams dry weight per square

meter by the total area of habitat similar in depth and

cover to the sampling site(s).

 Group respiration of the Mosquitofish population was

estimated based on von Bertalanffy's (1938) equation

relating rate of oxygen consumption to individual weight:


 R = a W b (20)



where R is oxygen consumption per hour in milligrams, Ww is

wet weight in grams, and a and b are constants for a given

species.

 Winberg (1956) has shown that numerous species may

 share the same coefficient. Hoss's (1968) coefficients for

 a similar-size fish, Fundulus heteroclitus, were used to

 estimate respiration of Gambusia. The equation with the

 Hoss coefficients was:


 R = 0.339 W (21)