Smolt physiology and endocrinology

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Edited by: Stephen D. McCormickAnthony Peter Farrell, and Colin J. Brauner

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Abstract

Hormones play a critical role in maintaining body fluid balance in euryhaline fishes during changes in environmental salinity. The neuroendocrine axis senses osmotic and ionic changes, then signals and coordinates tissue-specific responses to regulate water and ion fluxes. Rapid-acting hormones, e.g. angiotensins, cope with immediate challenges by controlling drinking rate and the activity of ion transporters in the gill, gut, and kidney. Slow-acting hormones, e.g. prolactin and growth hormone/insulin-like growth factor-1, reorganize the body for long-term acclimation by altering the abundance of ion transporters and through cell proliferation and differentiation of ionocytes and other osmoregulatory cells. Euryhaline species exist in all groups of fish, including cyclostomes, and cartilaginous and teleost fishes. The diverse strategies for responding to changes in salinity have led to differential regulation and tissue-specific effects of hormones. Combining traditional physiological approaches with genomic, transcriptomic, and proteomic analyses will elucidate the patterns and diversity of the endocrine control of euryhalinity.

Additional publication details

Publication type Book chapter
Publication Subtype Book Chapter
Title Smolt physiology and endocrinology
DOI 10.1016/B978-0-12-396951-4.00005-0
Volume 32
Year Published 2013
Language English
Publisher Academic Press
Publisher location Oxford; Waltham, MA
Contributing office(s) Leetown Science Center
Description 53 p
Larger Work Type Book
Larger Work Title Euryhaline fishes
First page 199
Last page 251
Online Only (Y/N) N
Additional Online Files (Y/N) N