Main content

Skin permeability of the amphibious mangrove rivulus Kryptolebias marmoratus in response to emersion

Show full item record

Title: Skin permeability of the amphibious mangrove rivulus Kryptolebias marmoratus in response to emersion
Author: Heffell, Quentin
Department: Department of Integrative Biology
Program: Integrative Biology
Advisor: Wright, Patricia
Abstract: The skin of the amphibious fishes is known to be a physiologically important tissue for maintaining homeostasis during emersion. I tested the hypothesis that skin permeability would be altered to maintain water balance during salinity acclimation and/or emersion. Osmotic permeability of the skin was assessed using 3H2O fluxes, and bulk osmotic flow was quantified using a novel dye-dilution technique. No regional variability between the dorsal and ventral skin region was found, although fish more often positioned themselves on the ventral surface when emersed. Hypersaline acclimation resulted in a decrease in 3H2O influx across the skin relative to hyposaline acclimation. Acute emersion (1 day) induced a decrease in bulk osmotic water loss in hypersaline-acclimated fish, whereas prolonged emersion (7 days) resulted in an increase in 3H2O influx. These findings suggest that K. marmoratus alter skin permeability to maximize water uptake and minimize water loss while emersed in hypersaline conditions.
URI: http://hdl.handle.net/10214/9491
Date: 2016-01


Files in this item

Files Size Format View
Heffell_Quentin_201601_MSc.pdf 1.316Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record