REARING OF BIVALVE MOLLUSKS
6
rounding soil into pipes oarrying sea water. Finally, some laboratories
that have plastio sea water systems have complained that since these
pipes are not electrically self-grounded, they present a serious element
of danger in laboratories with wet floors.
We are finding an increasing usage for plastic pumps and pipes,
especially in our temporary installations. We have also found that
tmks made of Fiberglas, instead of wood, can be advantageously used,
especially in areas where wood-boring organisms, such aa Teredo, am
common.
Fro. 1. Diegrain of wattw filter designed to
remove d l perticu~ete matter larger than
15 p in diameter. Description in text.
Outlet t u b
Normally, in addition to small algae on which larvttl arid juvenile
mollusks feed, sea water oontains many large diatom, frw-nwimming
crustaccoans, gaatropods, wormn, otc., arid t h c k uggn m d lervao. Many
of 1,tieHn I'orrnn (:olii[~4m with bivalve lsrvw for f o d , pruy on thorn or
may w o n hsrbor diwxww or pamites ttirit oould bo tranumittd to
larvae. We prevent undesirable organismH of larger sizm from entering
our larval cultures by filtering the water and later killing the smaller
forme with ultmviolati light.
'I'ho tiltcrr s l m o i i t coneists of a polyvinylohloride (PVC) core wound
with Orlon. 'l'he complete unit (Fig. 1) is manufactured by Commercial Filters Corporation, Melrose, Massachusetts (filter no. CFX1-10-5
6
rounding soil into pipes oarrying sea water. Finally, some laboratories
that have plastio sea water systems have complained that since these
pipes are not electrically self-grounded, they present a serious element
of danger in laboratories with wet floors.
We are finding an increasing usage for plastic pumps and pipes,
especially in our temporary installations. We have also found that
tmks made of Fiberglas, instead of wood, can be advantageously used,
especially in areas where wood-boring organisms, such aa Teredo, am
common.
Fro. 1. Diegrain of wattw filter designed to
remove d l perticu~ete matter larger than
15 p in diameter. Description in text.
Outlet t u b
Normally, in addition to small algae on which larvttl arid juvenile
mollusks feed, sea water oontains many large diatom, frw-nwimming
crustaccoans, gaatropods, wormn, otc., arid t h c k uggn m d lervao. Many
of 1,tieHn I'orrnn (:olii[~4m with bivalve lsrvw for f o d , pruy on thorn or
may w o n hsrbor diwxww or pamites ttirit oould bo tranumittd to
larvae. We prevent undesirable organismH of larger sizm from entering
our larval cultures by filtering the water and later killing the smaller
forme with ultmviolati light.
'I'ho tiltcrr s l m o i i t coneists of a polyvinylohloride (PVC) core wound
with Orlon. 'l'he complete unit (Fig. 1) is manufactured by Commercial Filters Corporation, Melrose, Massachusetts (filter no. CFX1-10-5