QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

First published online May 13, 2004
Journal of Experimental Biology 207, 2021-2031 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.00959

This Article Summary Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Related articles in JEB Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Steele, S. L. Articles by Wright, P. A. Search for Related Content PubMed PubMed Citation Articles by Steele, S. L. Articles by Wright, P. A.

Dogmas and controversies in the handling of nitrogenous wastes: Osmoregulation during early embryonic development in the marine little skate Raja erinacea; response to changes in external salinity

S. L. Steele¹, P. H. Yancey² and P. A. Wright^1,*

¹ Department of Zoology, University of Guelph, Guelph, ON N1G 2W1, Canada
² Biology Department, Whitman College, Walla Walla, WA 99362, USA

View larger version (10K): [in a new window]   Fig. 1. Urea excretion rates (mean ± S.E.M.) in 4-month old Raja erinacea embryos over a 120 h period of exposure to 75% seawater (A) and a subsequent 78 h reintroduction to 100% seawater (B), N=4. *Significantly different from control value at that time point (P<0.05).

View larger version (10K): [in a new window]   Fig. 2. Urea excretion rates (mean ± S.E.M.) in 8-month old Raja erinacea embryos over a 120 h period of exposure to 75% seawater (A) and a subsequent 78 h reintroduction to 100% seawater (B), N=4. *Significantly different from control value at that time point (P<0.05).

View larger version (11K): [in a new window]   Fig. 3. Ammonia excretion rates (mean ± S.E.M.) in 8-month old Raja erinacea embryos over a 120 h period of exposure to 75% seawater (A) and a subsequent 78 h reintroduction to 100% seawater (B), N=4.

View larger version (12K): [in a new window]   Fig. 4. Stacked plot of urea, TMAO, and total other osmolytes content (mean ± S.E.M.) in 4-month old embryos (E) and yolk (Y) samples after both 120 h of 75% seawater exposure (D) and 78 h of recovery in 100% (R) seawater, N=4. C, control. *Significantly different from control value (P<0.05).

View larger version (12K): [in a new window]   Fig. 5. Stacked plot of urea, TMAO, and total other osmolytes content (mean ± S.E.M.) in 8-month old embryos (E) and yolk (Y) samples after both 120 h of 75% seawater exposure (D) and 78 h of recovery in 100% (R) seawater, N=4. C, control. *Significantly different from control value (P<0.05).