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Brammer-Robbins E, Nouri MZ, Griffin EK, Aristizabal-Henao J, Denslow ND, Bowden JA, Larkin IV, Martyniuk CJ. Assessment of lipids and adrenal hormones in the Florida manatee (Trichechus manatus latirostris) from different habitats. Gen Comp Endocrinol 2023; 337:114250. [PMID: 36858274 DOI: 10.1016/j.ygcen.2023.114250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 02/09/2023] [Accepted: 02/24/2023] [Indexed: 03/02/2023]
Abstract
Florida manatees (Trichechus manatus latirostris), a federally protected species, are classified as threatened due to anthropogenic stressors. Manatees inhabit sites that are impacted by human activities that can negatively affect stress physiology and metabolism. Samples collected from healthy manatees (pregnant females, non-pregnant females, and males) at Crystal River and Indian River Lagoon in Florida, were assessed for adrenal hormones, proteins, glucose, and lipid content in plasma. The objective was to determine if healthy manatees sampled between 2010-2014 from the Indian River Lagoon exhibited evidence of stress compared to healthy manatees sampled between 2012-2019 from Crystal River. Plasma cortisol concentrations were not different in male and non-pregnant female manatees between sites but were elevated in pregnant manatees. Plasma aldosterone concentrations were elevated in Indian River Lagoon manatees relative to those at Crystal River, possibly due to differences in salinity and available freshwater between the two environments. Site differences were noted for plasma protein and glucose concentrations in manatees; additionally, differences between the sexes were also observed in glucose concentrations. Fifteen lipid subclasses, including oxidized lysophosphatidylcholines, oxidized phosphatidylcholines, oxidized triacylglycerols, were elevated in manatees from the Indian River Lagoon relative to manatees from Crystal River. Evidence of a stress response in healthy Indian River Lagoon manatees was lacking compared to Crystal River manatees. Differences in metabolites related to energy (glucose, protein, and lipids) may be related to site-specific variables, such as salinity and food availability/quality. This study generates novel data on plasma lipid profiles and provides cortisol, aldosterone, glucose, and protein values from healthy Florida manatees in two disparate sites that can be referenced in future studies. These data contribute to an improved understanding of manatee physiology to better inform population management.
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Affiliation(s)
- Elizabeth Brammer-Robbins
- Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, the United States of America; Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, the United States of America
| | - Mohammad-Zaman Nouri
- Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, the United States of America
| | - Emily K Griffin
- Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, the United States of America; Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, the United States of America
| | - Juan Aristizabal-Henao
- Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, the United States of America; BPGbio Inc., 500 Old Connecticut Path, Framingham, MA 01701, the United States of America
| | - Nancy D Denslow
- Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, the United States of America; Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, the United States of America; Genetics Institute, University of Florida, Gainesville, FL, the United States of America
| | - John A Bowden
- Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, the United States of America; Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, the United States of America; Department of Chemistry, University of Florida, Gainesville, FL 32611, the United States of America
| | - Iske V Larkin
- Aquatic Animal Health Program, Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida Gainesville, FL, the United States of America
| | - Christopher J Martyniuk
- Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, the United States of America; Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, the United States of America.
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