7 A teema aerent
woke
At Belle Island. the invertebrates usually samled vere the
Killer clas
idacna, the spider snail Lantis, the land hersit
crab Coenodite, the
black sea cucumber Holothuria atra, and the
brenching corals Acropore, Porites, Pocillopora, and
Heliopora.
Piesh, and equatic invertebrates vere usu [oo
collected along the
north or ocean side, algee on the lagoon and ocean sides, land
plants in the centre] portion, land hermit crabs among the
bushes of the north edge, and terns nearby.
centrelly on Janet Island.
Rats were obtained
Invertebrates and fish vere collected at low tide when
possible. Biological specimens were put on ice in insulated
containers and transported to the laboratory at Elmer Island for
immediate preparation or for freezing until time vas available
for dissection.
Soil samples were dried and packaged for shipment.
Five-
milliliter samples of sea water were dried on 1 1/2-inch stain-
less steel plates and ashed, except that tn 1956, 100-milliliter
samples vere used because of the low level of the activity.
These were treated with sodium carbonate to remove potasstum
contributes about 0.6 disin'.-~itlons per minute per
milliliter), and then filtered
whe precinttate used for
counting.
Radiocesium tis a?
carbonate (UWPL-46: lu).
vst by treatment with sodium
Plankton was prepared by filtering and removing 4s much as
1-2 grams to the 1 1/2-inch counting p? tes, drying, and ashing.
Prom oecastonal poor tows the wet sampi:
0.1 gram.
-.ight was as low as
Portions usually sampled from the invertebrates were:
from
Clams, mantle, adductor muscle, gill, kidney, visceral mass, and
shell;
from spider snails, mantle, muscle of foot, terminal
portions of liver and gut, visceral mass, and shell; from the
land herait crab, gill, digestive gland or liver, gut, carapace,
and muscle of leg; from sea cucumbers, gonad when suffictently
Plentiful, gut and contents, muscle of the body wall. and body
wall or integument with or without attached muscle: and from
coral the terminal portions of small branches.
Shell samples of
clams and snails were usually taken fron the thin edge to tnelude
pertostracun.
The term gut as used in this renort taplics any portion of
tizxe digestive tract not more specifically designited and ‘ncludes
the contents.
Sample size ves influenced somewhat by the niture of the
sample and the amount of radioactivity present.
When activity
was low, larger samples vere used. Between 5) and °J)) milligroe 1s
of ash were usually considered destratle, but weights ranged
widely, from less than 1) to more than 190) miliitgrams. ‘Shell
and gut with sandy content vere more lightly sampled on 4 wet