258
AUBREY GORBMAN
man’s valuable commentary: “No parameter of thyroid activity is any better than its potential as an index of hormone secretion rate.” Unfortunately, for any particular species this would require a prior study, using
coordinated measurements of both I2‘I and 1311, before the dependability
of a single index could be judged.
Variation of thyroid function with respect to temperature has been a
continuing and puzzling subject for research with fishes. Using various
indices of function (histological and radiochemical) lists have been made
of species whose thyroid function parallels, is inverse to, or is indifferent
to changes in environmental temperature (Table I). One of the clear
Table I
Direction of Change of Thyroid Glandular Activity in Relation to Changes,
Up or Down, of Ambient Temperatures
Criterion of thyroid
Species of fish
activity
Authority
A. Thyroid Activity Parallels Temperature Change
(1955)
Phoxinus phxinus, minnow
Histology
Barrington and Matty
Carassius auratus, goldfish
Histology
Fortune (1956)
Carassius auratus, goldfish
Radioiodine metabolism Hoar and Eales (1963)
Fundulus heteroclitus, mummichog Radioiodine metabolism Gorbman and Berg
Salmo gairdneri, rainbow trout
Radioiodine metabolism M. Fontaine and
(1955)
Fontaine (1957);
Eales (1964, 1965)
AnguiUa anguilla, European eel
Radioiodine metabolism Leloup (1958a; Leloup
and Fontaine (1960)
SaZveZinus fontinalis, brook trout Radioiodine metabolism Drury and Eales (1968)
B. Thyroid Activity Is Opposite to the Direction of Temperature Change
AnguilZa anguilla, European eel
Histology
M. Fontaine et al. (1953)
Sturgeon
Histology
Ivanova (1954)
Salmo gairdneri, rainbow trout
Histology
Olivereau (1955); Eales
Salvelinus fontinalis, brook trout Histology
Drury and Eales (1968)
Salmo trutta, brown trout
Histology
Swift (1959)
Radioiodine metabolism Swift (1959)
Umbra limi
Radioiodine metabolism Gorbman (1959)
(1964, 1965)
C. Thyroid Activity Is Indifferent to Temperature Change
Cyprinus carpio, carp
Histology
Olivereau (1955)
T i w tinca, tench
Histology
Olivereau (1955)
Mugil auratus, golden mullett
Histology
Olivereau (1955)
Scyliorhinus canicula, dogfish
Histology
Olivereau (1955)
a Based on data assembled by Drury and Eales (1968).
AUBREY GORBMAN
man’s valuable commentary: “No parameter of thyroid activity is any better than its potential as an index of hormone secretion rate.” Unfortunately, for any particular species this would require a prior study, using
coordinated measurements of both I2‘I and 1311, before the dependability
of a single index could be judged.
Variation of thyroid function with respect to temperature has been a
continuing and puzzling subject for research with fishes. Using various
indices of function (histological and radiochemical) lists have been made
of species whose thyroid function parallels, is inverse to, or is indifferent
to changes in environmental temperature (Table I). One of the clear
Table I
Direction of Change of Thyroid Glandular Activity in Relation to Changes,
Up or Down, of Ambient Temperatures
Criterion of thyroid
Species of fish
activity
Authority
A. Thyroid Activity Parallels Temperature Change
(1955)
Phoxinus phxinus, minnow
Histology
Barrington and Matty
Carassius auratus, goldfish
Histology
Fortune (1956)
Carassius auratus, goldfish
Radioiodine metabolism Hoar and Eales (1963)
Fundulus heteroclitus, mummichog Radioiodine metabolism Gorbman and Berg
Salmo gairdneri, rainbow trout
Radioiodine metabolism M. Fontaine and
(1955)
Fontaine (1957);
Eales (1964, 1965)
AnguiUa anguilla, European eel
Radioiodine metabolism Leloup (1958a; Leloup
and Fontaine (1960)
SaZveZinus fontinalis, brook trout Radioiodine metabolism Drury and Eales (1968)
B. Thyroid Activity Is Opposite to the Direction of Temperature Change
AnguilZa anguilla, European eel
Histology
M. Fontaine et al. (1953)
Sturgeon
Histology
Ivanova (1954)
Salmo gairdneri, rainbow trout
Histology
Olivereau (1955); Eales
Salvelinus fontinalis, brook trout Histology
Drury and Eales (1968)
Salmo trutta, brown trout
Histology
Swift (1959)
Radioiodine metabolism Swift (1959)
Umbra limi
Radioiodine metabolism Gorbman (1959)
(1964, 1965)
C. Thyroid Activity Is Indifferent to Temperature Change
Cyprinus carpio, carp
Histology
Olivereau (1955)
T i w tinca, tench
Histology
Olivereau (1955)
Mugil auratus, golden mullett
Histology
Olivereau (1955)
Scyliorhinus canicula, dogfish
Histology
Olivereau (1955)
a Based on data assembled by Drury and Eales (1968).