6
VICTOR L. LOOSANOFF AND HARRY C. DAVIS
with an 015-RlOX filter element). These filters, designed to remove
all particulate matter larger than 15 p in diameter, are made with a
variety of core and winding materials. We chose the PVC core because
it is nontoxic, and the Orlon winding because it is inexpensive, nontoxic
and does not support bacterial growth.
To prevent fungus diseases in clam larvae and juveniles we began
treating sea water with ultraviolet light in 1954 and, within a short time,
had some evidence that such treatment, even of running, unfiltered sea
Rubber squeeze gasket
'- 1.25 in. 1.0. PVC pipe
FICI. 2. I ' h o t ~ o K r t q t t ~
( C l h n t ! ) 1 i t ~ 1 ~ l r t ~ w l l i ~
(/dew) l,f iili~rfiviolvt, w1rt.w i ~ r w t m l t ~ t l i ~
I l t l i i ,
i t w i t rrl. Milliwtl !$ictlrtyic.rtl t , t d r t r r / ~ l . f ) q ~ .
!)f*~crl~lt,tftrl ill t . 0 ~
1..
w c ~ k ~ ,
WILH twlpfiil in provmting mortdity of juvenile clams. I n the
sumnicr of 1!)59 it was definitely demonstrated that larval cultures,
receiving treated water and untreated phytoplankton from the outdoor
mass culture, developed fungus, whereas larval cultures in which
phytoplankton and sea water were both treated did not. Since that
time, i t has become a routine practice to treat with ultraviolet light all
sea water used for our larval culture8 and for keeping recently-eot
clams and oysters. Moreover, we are attempting to supply ultraviolettreated running sea water to all containers ip which later stage8 of
juvenile clams are grown.
VICTOR L. LOOSANOFF AND HARRY C. DAVIS
with an 015-RlOX filter element). These filters, designed to remove
all particulate matter larger than 15 p in diameter, are made with a
variety of core and winding materials. We chose the PVC core because
it is nontoxic, and the Orlon winding because it is inexpensive, nontoxic
and does not support bacterial growth.
To prevent fungus diseases in clam larvae and juveniles we began
treating sea water with ultraviolet light in 1954 and, within a short time,
had some evidence that such treatment, even of running, unfiltered sea
Rubber squeeze gasket
'- 1.25 in. 1.0. PVC pipe
FICI. 2. I ' h o t ~ o K r t q t t ~
( C l h n t ! ) 1 i t ~ 1 ~ l r t ~ w l l i ~
(/dew) l,f iili~rfiviolvt, w1rt.w i ~ r w t m l t ~ t l i ~
I l t l i i ,
i t w i t rrl. Milliwtl !$ictlrtyic.rtl t , t d r t r r / ~ l . f ) q ~ .
!)f*~crl~lt,tftrl ill t . 0 ~
1..
w c ~ k ~ ,
WILH twlpfiil in provmting mortdity of juvenile clams. I n the
sumnicr of 1!)59 it was definitely demonstrated that larval cultures,
receiving treated water and untreated phytoplankton from the outdoor
mass culture, developed fungus, whereas larval cultures in which
phytoplankton and sea water were both treated did not. Since that
time, i t has become a routine practice to treat with ultraviolet light all
sea water used for our larval culture8 and for keeping recently-eot
clams and oysters. Moreover, we are attempting to supply ultraviolettreated running sea water to all containers ip which later stage8 of
juvenile clams are grown.