Mortality of Brook Trout, Mottled Sculpins, and Slimy Sculpins During Acidic Episodes
Brook trout Salvelinus fontinalis. mottled sculpins Cottus bairdi. and slimy sculpins Cottus cognatus occur in many Pennsylvania streams that have depressed pH and elevated aluminum concentrations during episodes of high stream discharge (acidic episodes). We performed 20-d in situ cage exposures wi...
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ftarkansastu:oai:orc.library.atu.edu:faculty_pub_biol-1027 2023-09-05T13:18:54+02:00 Mortality of Brook Trout, Mottled Sculpins, and Slimy Sculpins During Acidic Episodes Gagen, Charles J. Sharpe, William E. Carline, Robert F. 1993-01-01T08:00:00Z https://orc.library.atu.edu/faculty_pub_biol/28 https://doi.org/10.1577/1548-8659(1993)122<0616:MOBTMS>2.3.CO;2 unknown Online Research Commons @ ATU https://orc.library.atu.edu/faculty_pub_biol/28 doi:10.1577/1548-8659(1993)122<0616:MOBTMS>2.3.CO;2 Faculty Publications - Biological Sciences Brook trout Salvelinus fontinalis mottled sculpins pH level text 1993 ftarkansastu https://doi.org/10.1577/1548-8659(1993)122<0616:MOBTMS>2.3.CO;2 2023-08-14T06:14:56Z Brook trout Salvelinus fontinalis. mottled sculpins Cottus bairdi. and slimy sculpins Cottus cognatus occur in many Pennsylvania streams that have depressed pH and elevated aluminum concentrations during episodes of high stream discharge (acidic episodes). We performed 20-d in situ cage exposures with these species to determine their relative sensitivities to field conditions. We also exposed fish in the laboratory to synthetic soft water, without added Al, to elevate possible effects of Al on sodium flux rates and pH toxicity. Exposures were in five streams: two with high pH (>5.60) and low Al concentrations (<80 >μg/L) and three with low pH (usually between 5.0 and 5.5) and high Al levels (124-294 μg/L). Exposures were during two low-discharge fall periods, when pH tends to be seasonally higher and Al concentrations lower, and two relatively high-discharge spring seasons, when lower pH and higher Al concentrations are typical. Few fish died (generally < 10%) in the two streams that had higher pH and lower Al concentrations, whereas mortalities typically exceeded 20% and were as high as 100% during spring exposures in the streams with lower pH and elevated Al concentrations. All three species had higher mortality rates in spring, 20-100%, than in fall, 0-29%. Mottled sculpins and slimy sculpins had similar mortality rates and both had lower mortality rates than brook trout when exposed to similar conditions. We compared Na flux rates of mottled sculpins to those of brook trout in laboratory exposures at pH 4.0, 5.0, and 6.0 to determine if low pH alone could account for mortality rates in the field. Because Na flux rates at pH 5.0, without added Al, were similar to flux rates of the controls for both species, high Al levels were believed to have contributed to the increased mortality observed in streams. © 1993 by the American fisheries society. Text Cottus cognatus Online Research Commons @ATU (Arkansas Tech University) |
institution |
Open Polar |
collection |
Online Research Commons @ATU (Arkansas Tech University) |
op_collection_id |
ftarkansastu |
language |
unknown |
topic |
Brook trout Salvelinus fontinalis mottled sculpins pH level |
spellingShingle |
Brook trout Salvelinus fontinalis mottled sculpins pH level Gagen, Charles J. Sharpe, William E. Carline, Robert F. Mortality of Brook Trout, Mottled Sculpins, and Slimy Sculpins During Acidic Episodes |
topic_facet |
Brook trout Salvelinus fontinalis mottled sculpins pH level |
description |
Brook trout Salvelinus fontinalis. mottled sculpins Cottus bairdi. and slimy sculpins Cottus cognatus occur in many Pennsylvania streams that have depressed pH and elevated aluminum concentrations during episodes of high stream discharge (acidic episodes). We performed 20-d in situ cage exposures with these species to determine their relative sensitivities to field conditions. We also exposed fish in the laboratory to synthetic soft water, without added Al, to elevate possible effects of Al on sodium flux rates and pH toxicity. Exposures were in five streams: two with high pH (>5.60) and low Al concentrations (<80 >μg/L) and three with low pH (usually between 5.0 and 5.5) and high Al levels (124-294 μg/L). Exposures were during two low-discharge fall periods, when pH tends to be seasonally higher and Al concentrations lower, and two relatively high-discharge spring seasons, when lower pH and higher Al concentrations are typical. Few fish died (generally < 10%) in the two streams that had higher pH and lower Al concentrations, whereas mortalities typically exceeded 20% and were as high as 100% during spring exposures in the streams with lower pH and elevated Al concentrations. All three species had higher mortality rates in spring, 20-100%, than in fall, 0-29%. Mottled sculpins and slimy sculpins had similar mortality rates and both had lower mortality rates than brook trout when exposed to similar conditions. We compared Na flux rates of mottled sculpins to those of brook trout in laboratory exposures at pH 4.0, 5.0, and 6.0 to determine if low pH alone could account for mortality rates in the field. Because Na flux rates at pH 5.0, without added Al, were similar to flux rates of the controls for both species, high Al levels were believed to have contributed to the increased mortality observed in streams. © 1993 by the American fisheries society. |
format |
Text |
author |
Gagen, Charles J. Sharpe, William E. Carline, Robert F. |
author_facet |
Gagen, Charles J. Sharpe, William E. Carline, Robert F. |
author_sort |
Gagen, Charles J. |
title |
Mortality of Brook Trout, Mottled Sculpins, and Slimy Sculpins During Acidic Episodes |
title_short |
Mortality of Brook Trout, Mottled Sculpins, and Slimy Sculpins During Acidic Episodes |
title_full |
Mortality of Brook Trout, Mottled Sculpins, and Slimy Sculpins During Acidic Episodes |
title_fullStr |
Mortality of Brook Trout, Mottled Sculpins, and Slimy Sculpins During Acidic Episodes |
title_full_unstemmed |
Mortality of Brook Trout, Mottled Sculpins, and Slimy Sculpins During Acidic Episodes |
title_sort |
mortality of brook trout, mottled sculpins, and slimy sculpins during acidic episodes |
publisher |
Online Research Commons @ ATU |
publishDate |
1993 |
url |
https://orc.library.atu.edu/faculty_pub_biol/28 https://doi.org/10.1577/1548-8659(1993)122<0616:MOBTMS>2.3.CO;2 |
genre |
Cottus cognatus |
genre_facet |
Cottus cognatus |
op_source |
Faculty Publications - Biological Sciences |
op_relation |
https://orc.library.atu.edu/faculty_pub_biol/28 doi:10.1577/1548-8659(1993)122<0616:MOBTMS>2.3.CO;2 |
op_doi |
https://doi.org/10.1577/1548-8659(1993)122<0616:MOBTMS>2.3.CO;2 |
_version_ |
1776199749799510016 |