103
(7) Using the eyes of goatfish from Rongelap and Kabelle
Islands as indices,
the level of zinc-65 in the Kabelle samples
proved to be significantly higher than in the Rongelap samples.
(8)
Island,
In herbivorous surgeonfish collected at Rongelap
there was no evidence of measurable amounts of zinc-65.
Stable zinc was present in all surgeonfish tissues examined.
(9)
Statistical analyses of the data on both goatfish and
surgeonfish suggested a possible inverse correlation between
the concentrations of zinc in eye and muscle tissues and the
size of the fish.
The geometry of the eye was shown to be
responsible for this relationship in that organ.
The possibil-
ity of a greater need for the zine enzyme lactic acid dehydrogenase in juvenile fish was proposed to explain the similar
relationship in muscle tissue.
Two models have been presented,
one showing the cycling
and loss of fallout radiozinc in the ecological system of a
coral atoll lagoon,
and the other showing the uptake,
and loss of zinc within the organism of a
cycling
fish.
It may be concluded from the data of this thesis and from
the information presented in the review of the literature that:
(1) Radioactive zine introduced into a marine environment
is able to resist isotopic dilution by association with a solid
phase,
either as a result of its initial introduction as a
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