The Influence of Increased CO2 on Early Developmental Stages of Cobia, Rachycentron canadum
Projected increases in atmospheric CO2 and the resulting decrease in oceanic pH over the course of the 21st century warrant studies on the effects of these changes on marine teleosts. The goal of this dissertation was to assess the impact of projected changes in CO2 on the early physiological dynami...
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ftunivmiamiir:oai:scholarlyrepository.miami.edu:oa_dissertations-2136 2023-05-15T17:51:38+02:00 The Influence of Increased CO2 on Early Developmental Stages of Cobia, Rachycentron canadum Ebanks, Dwight A. Nelson Ehrhardt Daniel Benetti Chris Langdon Athula Wikramanayake Margaret Miller 2013-12-14T08:00:00Z application/pdf https://scholarlyrepository.miami.edu/oa_dissertations/1133 https://scholarlyrepository.miami.edu/cgi/viewcontent.cgi?article=2136&context=oa_dissertations unknown Scholarly Repository Open Access Dissertations hypercapnia carbon dioxide ocean acidification cobia yolk-sac larvae unrestricted 2013 ftunivmiamiir 2019-09-06T22:47:50Z Projected increases in atmospheric CO2 and the resulting decrease in oceanic pH over the course of the 21st century warrant studies on the effects of these changes on marine teleosts. The goal of this dissertation was to assess the impact of projected changes in CO2 on the early physiological dynamics and development of cobia, Rachycentron canadum. Spermatozoa respiration rates displayed a non significant decrease from 1.0 + 0.2 nmol O2/mL semen•sec + S.E. at 380 ppm CO2 to 0.7 + 0.1 nmol O2/mL semen•sec + S.E. at 800 ppm CO2. Spermatozoa velocity decreased from 22.1 + 0.5 to 14.9 + 0.4 µm/sec + S.E. for one male and from 16.9 + 0.4 to 15.5 + 0.5 µm/sec + S.E. for the second male. Both decreases in velocity were statistically significant. Regression analysis of embryo respiration did not show a statistically significant difference across the CO2 levels examined (400, 480, 500, 580, 1020, 2920 ppm). Embryonic development after 9 and 19 hrs exposure to elevated levels of CO2 (876, 949, 957 ppm) were not significantly different. Yolk-sac larvae respiration decreased from 10.7 + 3.4 nmol O2/larvae/hr + S.E. at 380 ppm to 6.6 + 2.3 nmol O2/larvae/hr + S.E. at 800 ppm. Yolk-sac larvae total length decreased from 2.59 + 0.34 to 2.29 + 0.28 mm + S.D. at 560 ppm but increased to 2.89 + 0.28 mm + S.D. at 800 ppm CO2. These results suggest early life history stages of cobia may be resistant to near future CO2 levels. Other/Unknown Material Ocean acidification University of Miami: Scholarly Repository |
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Open Polar |
collection |
University of Miami: Scholarly Repository |
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ftunivmiamiir |
language |
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topic |
hypercapnia carbon dioxide ocean acidification cobia yolk-sac larvae |
spellingShingle |
hypercapnia carbon dioxide ocean acidification cobia yolk-sac larvae Ebanks, Dwight A. The Influence of Increased CO2 on Early Developmental Stages of Cobia, Rachycentron canadum |
topic_facet |
hypercapnia carbon dioxide ocean acidification cobia yolk-sac larvae |
description |
Projected increases in atmospheric CO2 and the resulting decrease in oceanic pH over the course of the 21st century warrant studies on the effects of these changes on marine teleosts. The goal of this dissertation was to assess the impact of projected changes in CO2 on the early physiological dynamics and development of cobia, Rachycentron canadum. Spermatozoa respiration rates displayed a non significant decrease from 1.0 + 0.2 nmol O2/mL semen•sec + S.E. at 380 ppm CO2 to 0.7 + 0.1 nmol O2/mL semen•sec + S.E. at 800 ppm CO2. Spermatozoa velocity decreased from 22.1 + 0.5 to 14.9 + 0.4 µm/sec + S.E. for one male and from 16.9 + 0.4 to 15.5 + 0.5 µm/sec + S.E. for the second male. Both decreases in velocity were statistically significant. Regression analysis of embryo respiration did not show a statistically significant difference across the CO2 levels examined (400, 480, 500, 580, 1020, 2920 ppm). Embryonic development after 9 and 19 hrs exposure to elevated levels of CO2 (876, 949, 957 ppm) were not significantly different. Yolk-sac larvae respiration decreased from 10.7 + 3.4 nmol O2/larvae/hr + S.E. at 380 ppm to 6.6 + 2.3 nmol O2/larvae/hr + S.E. at 800 ppm. Yolk-sac larvae total length decreased from 2.59 + 0.34 to 2.29 + 0.28 mm + S.D. at 560 ppm but increased to 2.89 + 0.28 mm + S.D. at 800 ppm CO2. These results suggest early life history stages of cobia may be resistant to near future CO2 levels. |
author2 |
Nelson Ehrhardt Daniel Benetti Chris Langdon Athula Wikramanayake Margaret Miller |
format |
Other/Unknown Material |
author |
Ebanks, Dwight A. |
author_facet |
Ebanks, Dwight A. |
author_sort |
Ebanks, Dwight A. |
title |
The Influence of Increased CO2 on Early Developmental Stages of Cobia, Rachycentron canadum |
title_short |
The Influence of Increased CO2 on Early Developmental Stages of Cobia, Rachycentron canadum |
title_full |
The Influence of Increased CO2 on Early Developmental Stages of Cobia, Rachycentron canadum |
title_fullStr |
The Influence of Increased CO2 on Early Developmental Stages of Cobia, Rachycentron canadum |
title_full_unstemmed |
The Influence of Increased CO2 on Early Developmental Stages of Cobia, Rachycentron canadum |
title_sort |
influence of increased co2 on early developmental stages of cobia, rachycentron canadum |
publisher |
Scholarly Repository |
publishDate |
2013 |
url |
https://scholarlyrepository.miami.edu/oa_dissertations/1133 https://scholarlyrepository.miami.edu/cgi/viewcontent.cgi?article=2136&context=oa_dissertations |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Open Access Dissertations |
_version_ |
1766158845088890880 |