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PROLACTIN (FISH PROLACTIN OR
PARALACTIN) AND GROWTH HORMONE
1. N . BALL
I. Prolactin (Fish Prolactin or Paralactin)
. . . .
A. Introduction
. . . . . . . . .
B. Prolactin and Osmoregulation in Teleosts . . .
C. Prolactin and Melanogenesis in Teleosts
. . .
D. Prolactin and Epidermal Mucous Cells in Teleosts .
E. Miscellaneous Effects of Prolactin in Fishes . . .
F. Extraction of Paralactin and Hypothalamic Control .
11. Growth Hormone . . . . . . . . .
A. Introduction
. . . . . . . . .
B. Effects of Hypophysectomy on Growth in Fishes . .
C. Effects of GH on Growth in Hypophysectomized Fishes
D. Metabolic Effects of GH in Fishes . . . . .
E. Miscellaneous Effects of GH in Fishes . . . .
F. Effects of Fish Pituitary Material on Growth in Other
Vertebrates
. . . . . . . . .
G. Extraction of Fish GH . . . . . . .
H. Hypothalamic Control of Fish GH Secretion . . .
References . . . . . . . . . . .
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I. PROLACTIN (FISH PROLACTIN OR PARALACTIN)
A. Introduction
In higher vertebrates, prolactin has physiological actions on biological
features that are missing from fishes: stimulation of the pigeon crop and
the mammary gland and of the postovulatory corpus luteum in some
mammals, and induction of the water-drive and land-water integumentary
changes in the urodele amphibians (Grant and Grant, 1958; Riddle,
1963a,b; Grant and Cooper, 1965; Meites and Nicoll, 1966; Vellano et al.,
207