Lipid Metabolites as Energy Stores in Four Stingray Species
Assessing macronutrient transfer is important for estimating ecosystem health and structure. This nutrient transfer is facilitated through trophic position interactions and the consumption of biomass. Lipids are macronutrients that can be used to assess energy flow. Triglyceride (TAG) and free fatty...
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ftgeorgiasouth:oai:digitalcommons.georgiasouthern.edu:etd-3542 2023-09-26T15:21:28+02:00 Lipid Metabolites as Energy Stores in Four Stingray Species Moniz, Lauren 2021-01-01T08:00:00Z application/pdf https://digitalcommons.georgiasouthern.edu/etd/2322 https://digitalcommons.georgiasouthern.edu/context/etd/article/3542/viewcontent/CORRECTEDR.Lipid_Metabolites_as_Energy_Stores_in_Four_Stingray_Species.pdf unknown Digital Commons@Georgia Southern https://digitalcommons.georgiasouthern.edu/etd/2322 https://digitalcommons.georgiasouthern.edu/context/etd/article/3542/viewcontent/CORRECTEDR.Lipid_Metabolites_as_Energy_Stores_in_Four_Stingray_Species.pdf http://creativecommons.org/licenses/by/4.0/ Electronic Theses and Dissertations Stingray Triglycerides Free fatty acids Liver Plasma Muscle Trophic position Marine Biology Other Physiology text 2021 ftgeorgiasouth 2023-08-27T22:25:57Z Assessing macronutrient transfer is important for estimating ecosystem health and structure. This nutrient transfer is facilitated through trophic position interactions and the consumption of biomass. Lipids are macronutrients that can be used to assess energy flow. Triglyceride (TAG) and free fatty acids (FFA) are important lipids that are obtained from diet and integrate into tissues. They are representative of energy stores and potential energy available for metabolic processes. In marine ecosystems, stingrays occupy the mesopredator niche, facilitating nutrient transfer from lower to higher trophic positions. Stingrays consume a variety of prey items ranging in lipid content, but how lipid metabolites compare between batoid tissues and across species is poorly understood. This study aims to determine tissue-specific and species-specific differences in TAG and FFA in liver, plasma, and muscle tissues of four stingray species. Liver, muscle, and plasma samples were collected from butterfly rays (Gymnura lessae), Atlantic stingrays (Hypanus sabinus), bluntnose stingrays (Hypanus say), and southern bullnose rays (Myliobatis freminvillii) from the Northwest Atlantic. Tissue concentrations of TAG and FFA were quantified using colorimetric assays and analyzed using a linear mixed-effects model. Overall, liver had higher TAG and FFA concentrations than plasma and muscle. However, bullnose ray and Atlantic stingray muscle TAG and FFA were not significantly different from liver. Butterfly rays had significantly greater liver TAG than Atlantic and bluntnose stingrays. Bullnose rays had significantly greater muscle TAG and FFA than all three species. The butterfly rays’ liver TAG content may be attributed to their diet since they primarily consume teleosts. Bullnose rays’ muscle TAG and FFA are unusual and whether muscle has the capacity for lipid oxidation or is an alternative lipid storage tissue should be further researched. Results from this study can be used as to further understand energy flow through trophic ... Text Northwest Atlantic Georgia Southern University: Digital Commons@Georgia Southern |
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Georgia Southern University: Digital Commons@Georgia Southern |
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ftgeorgiasouth |
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Stingray Triglycerides Free fatty acids Liver Plasma Muscle Trophic position Marine Biology Other Physiology |
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Stingray Triglycerides Free fatty acids Liver Plasma Muscle Trophic position Marine Biology Other Physiology Moniz, Lauren Lipid Metabolites as Energy Stores in Four Stingray Species |
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Stingray Triglycerides Free fatty acids Liver Plasma Muscle Trophic position Marine Biology Other Physiology |
description |
Assessing macronutrient transfer is important for estimating ecosystem health and structure. This nutrient transfer is facilitated through trophic position interactions and the consumption of biomass. Lipids are macronutrients that can be used to assess energy flow. Triglyceride (TAG) and free fatty acids (FFA) are important lipids that are obtained from diet and integrate into tissues. They are representative of energy stores and potential energy available for metabolic processes. In marine ecosystems, stingrays occupy the mesopredator niche, facilitating nutrient transfer from lower to higher trophic positions. Stingrays consume a variety of prey items ranging in lipid content, but how lipid metabolites compare between batoid tissues and across species is poorly understood. This study aims to determine tissue-specific and species-specific differences in TAG and FFA in liver, plasma, and muscle tissues of four stingray species. Liver, muscle, and plasma samples were collected from butterfly rays (Gymnura lessae), Atlantic stingrays (Hypanus sabinus), bluntnose stingrays (Hypanus say), and southern bullnose rays (Myliobatis freminvillii) from the Northwest Atlantic. Tissue concentrations of TAG and FFA were quantified using colorimetric assays and analyzed using a linear mixed-effects model. Overall, liver had higher TAG and FFA concentrations than plasma and muscle. However, bullnose ray and Atlantic stingray muscle TAG and FFA were not significantly different from liver. Butterfly rays had significantly greater liver TAG than Atlantic and bluntnose stingrays. Bullnose rays had significantly greater muscle TAG and FFA than all three species. The butterfly rays’ liver TAG content may be attributed to their diet since they primarily consume teleosts. Bullnose rays’ muscle TAG and FFA are unusual and whether muscle has the capacity for lipid oxidation or is an alternative lipid storage tissue should be further researched. Results from this study can be used as to further understand energy flow through trophic ... |
format |
Text |
author |
Moniz, Lauren |
author_facet |
Moniz, Lauren |
author_sort |
Moniz, Lauren |
title |
Lipid Metabolites as Energy Stores in Four Stingray Species |
title_short |
Lipid Metabolites as Energy Stores in Four Stingray Species |
title_full |
Lipid Metabolites as Energy Stores in Four Stingray Species |
title_fullStr |
Lipid Metabolites as Energy Stores in Four Stingray Species |
title_full_unstemmed |
Lipid Metabolites as Energy Stores in Four Stingray Species |
title_sort |
lipid metabolites as energy stores in four stingray species |
publisher |
Digital Commons@Georgia Southern |
publishDate |
2021 |
url |
https://digitalcommons.georgiasouthern.edu/etd/2322 https://digitalcommons.georgiasouthern.edu/context/etd/article/3542/viewcontent/CORRECTEDR.Lipid_Metabolites_as_Energy_Stores_in_Four_Stingray_Species.pdf |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
Electronic Theses and Dissertations |
op_relation |
https://digitalcommons.georgiasouthern.edu/etd/2322 https://digitalcommons.georgiasouthern.edu/context/etd/article/3542/viewcontent/CORRECTEDR.Lipid_Metabolites_as_Energy_Stores_in_Four_Stingray_Species.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
_version_ |
1778146270084333568 |