Experimental Studies on the Impact of the Projected Ocean Acidification on Fish Survival, Health, Growth, and Meat Quality; Black Sea Bream (Acanthopagrus schlegelii), Physiological and Histological Studies
Acidification (OA), a global threat to the world’s oceans, is projected to significantly grow if CO2 continues to be emitted into the atmosphere at high levels. This will result in a slight decrease in pH. Since the latter is a logarithmic scale of acidity, the higher acidic seawater is expected to...
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ftmdpi:oai:mdpi.com:/2076-2615/11/11/3119/ 2023-08-20T04:08:59+02:00 Experimental Studies on the Impact of the Projected Ocean Acidification on Fish Survival, Health, Growth, and Meat Quality; Black Sea Bream (Acanthopagrus schlegelii), Physiological and Histological Studies Fabrice Arnaud Tegomo Zhiwen Zhong Achille Pandong Njomoue Samuel Ukpong Okon Sami Ullah Neveen Anandi Gray Kai Chen Yuxiao Sun Jinxing Xiao Lei Wang Ying Ye Hui Huang Qingjun Shao agris 2021-10-31 application/pdf https://doi.org/10.3390/ani11113119 EN eng Multidisciplinary Digital Publishing Institute Aquatic Animals https://dx.doi.org/10.3390/ani11113119 https://creativecommons.org/licenses/by/4.0/ Animals; Volume 11; Issue 11; Pages: 3119 climate change growth performance histology metabolic acidosis microvilli atrophy ocean acidification seawater pH Text 2021 ftmdpi https://doi.org/10.3390/ani11113119 2023-08-01T03:07:24Z Acidification (OA), a global threat to the world’s oceans, is projected to significantly grow if CO2 continues to be emitted into the atmosphere at high levels. This will result in a slight decrease in pH. Since the latter is a logarithmic scale of acidity, the higher acidic seawater is expected to have a tremendous impact on marine living resources in the long-term. An 8-week laboratory experiment was designed to assess the impact of the projected pH in 2100 and beyond on fish survival, health, growth, and fish meat quality. Two projected scenarios were simulated with the control treatment, in triplicates. The control treatment had a pH of 8.10, corresponding to a pCO2 of 321.37 ± 11.48 µatm. The two projected scenarios, named Predict_A and Predict_B, had pH values of 7.80-pCO2 = 749.12 ± 27.03 and 7.40-pCO2 = 321.37 ± 11.48 µatm, respectively. The experiment was preceded by 2 weeks of acclimation. After the acclimation, 20 juvenile black sea breams (Acanthopagrus schlegelii) of 2.72 ± 0.01 g were used per tank. This species has been selected mainly due to its very high resistance to diseases and environmental changes, assuming that a weaker fish resistance will also be susceptibly affected. In all tanks, the fish were fed with the same commercial diet. The seawater’s physicochemical parameters were measured daily. Fish samples were subjected to physiological, histological, and biochemical analyses. Fish growth, feeding efficiency, protein efficiency ratio, and crude protein content were significantly decreased with a lower pH. Scanning electron microscopy revealed multiple atrophies of microvilli throughout the small intestine’s brush border in samples from Predict_A and Predict_B. This significantly reduced nutrient absorption, resulting in significantly lower feed efficiency, lower fish growth, and lower meat quality. As a result of an elevated pCO2 in seawater, the fish eat more than normal but grow less than normal. Liver observation showed blood congestion, hemorrhage, necrosis, vacuolation of ... Text Ocean acidification MDPI Open Access Publishing Animals 11 11 3119 |
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MDPI Open Access Publishing |
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English |
topic |
climate change growth performance histology metabolic acidosis microvilli atrophy ocean acidification seawater pH |
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climate change growth performance histology metabolic acidosis microvilli atrophy ocean acidification seawater pH Fabrice Arnaud Tegomo Zhiwen Zhong Achille Pandong Njomoue Samuel Ukpong Okon Sami Ullah Neveen Anandi Gray Kai Chen Yuxiao Sun Jinxing Xiao Lei Wang Ying Ye Hui Huang Qingjun Shao Experimental Studies on the Impact of the Projected Ocean Acidification on Fish Survival, Health, Growth, and Meat Quality; Black Sea Bream (Acanthopagrus schlegelii), Physiological and Histological Studies |
topic_facet |
climate change growth performance histology metabolic acidosis microvilli atrophy ocean acidification seawater pH |
description |
Acidification (OA), a global threat to the world’s oceans, is projected to significantly grow if CO2 continues to be emitted into the atmosphere at high levels. This will result in a slight decrease in pH. Since the latter is a logarithmic scale of acidity, the higher acidic seawater is expected to have a tremendous impact on marine living resources in the long-term. An 8-week laboratory experiment was designed to assess the impact of the projected pH in 2100 and beyond on fish survival, health, growth, and fish meat quality. Two projected scenarios were simulated with the control treatment, in triplicates. The control treatment had a pH of 8.10, corresponding to a pCO2 of 321.37 ± 11.48 µatm. The two projected scenarios, named Predict_A and Predict_B, had pH values of 7.80-pCO2 = 749.12 ± 27.03 and 7.40-pCO2 = 321.37 ± 11.48 µatm, respectively. The experiment was preceded by 2 weeks of acclimation. After the acclimation, 20 juvenile black sea breams (Acanthopagrus schlegelii) of 2.72 ± 0.01 g were used per tank. This species has been selected mainly due to its very high resistance to diseases and environmental changes, assuming that a weaker fish resistance will also be susceptibly affected. In all tanks, the fish were fed with the same commercial diet. The seawater’s physicochemical parameters were measured daily. Fish samples were subjected to physiological, histological, and biochemical analyses. Fish growth, feeding efficiency, protein efficiency ratio, and crude protein content were significantly decreased with a lower pH. Scanning electron microscopy revealed multiple atrophies of microvilli throughout the small intestine’s brush border in samples from Predict_A and Predict_B. This significantly reduced nutrient absorption, resulting in significantly lower feed efficiency, lower fish growth, and lower meat quality. As a result of an elevated pCO2 in seawater, the fish eat more than normal but grow less than normal. Liver observation showed blood congestion, hemorrhage, necrosis, vacuolation of ... |
format |
Text |
author |
Fabrice Arnaud Tegomo Zhiwen Zhong Achille Pandong Njomoue Samuel Ukpong Okon Sami Ullah Neveen Anandi Gray Kai Chen Yuxiao Sun Jinxing Xiao Lei Wang Ying Ye Hui Huang Qingjun Shao |
author_facet |
Fabrice Arnaud Tegomo Zhiwen Zhong Achille Pandong Njomoue Samuel Ukpong Okon Sami Ullah Neveen Anandi Gray Kai Chen Yuxiao Sun Jinxing Xiao Lei Wang Ying Ye Hui Huang Qingjun Shao |
author_sort |
Fabrice Arnaud Tegomo |
title |
Experimental Studies on the Impact of the Projected Ocean Acidification on Fish Survival, Health, Growth, and Meat Quality; Black Sea Bream (Acanthopagrus schlegelii), Physiological and Histological Studies |
title_short |
Experimental Studies on the Impact of the Projected Ocean Acidification on Fish Survival, Health, Growth, and Meat Quality; Black Sea Bream (Acanthopagrus schlegelii), Physiological and Histological Studies |
title_full |
Experimental Studies on the Impact of the Projected Ocean Acidification on Fish Survival, Health, Growth, and Meat Quality; Black Sea Bream (Acanthopagrus schlegelii), Physiological and Histological Studies |
title_fullStr |
Experimental Studies on the Impact of the Projected Ocean Acidification on Fish Survival, Health, Growth, and Meat Quality; Black Sea Bream (Acanthopagrus schlegelii), Physiological and Histological Studies |
title_full_unstemmed |
Experimental Studies on the Impact of the Projected Ocean Acidification on Fish Survival, Health, Growth, and Meat Quality; Black Sea Bream (Acanthopagrus schlegelii), Physiological and Histological Studies |
title_sort |
experimental studies on the impact of the projected ocean acidification on fish survival, health, growth, and meat quality; black sea bream (acanthopagrus schlegelii), physiological and histological studies |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/ani11113119 |
op_coverage |
agris |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Animals; Volume 11; Issue 11; Pages: 3119 |
op_relation |
Aquatic Animals https://dx.doi.org/10.3390/ani11113119 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/ani11113119 |
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Animals |
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11 |
container_issue |
11 |
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3119 |
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1774721606440976384 |