A multi-agency effort assesses the health of manatees and provides baseline information on their health, reproductive status, and nutritional condition.
The Science Issue and Relevance: Federal and state researchers have been involved in manatee (Trichechus manatus) biomedical health assessment programs for a couple of decades. Biologists and veterinarians have implemented training and encouraged multi-agency participation whenever possible to ensure consistency in data acquisition, recording, sample collection, publication integrity, and archival standards. Under the U.S. Fish and Wildlife Service Research Permit (MA791721) granted to the U.S. Geological Survey (USGS) Sirenia Project, federal biologists and collaborators are allowed to conduct up to 10 physiological research studies on wild and captive manatees detailing various aspects of their biology. This research initiative addresses concerns and priorities outlined in the Florida Manatee Recovery Plan. The assessment teams strive to continue this collaborative effort to help advance our understanding of health-related issues confronting the manatee throughout their range.
Methodology for Addressing the Issue: Researchers with the project have been collaborating on numerous studies over the last several years. One extensive study, initiated in 2006, has focused on health and fitness of the winter manatee population located in the Crystal River National Wildlife Refuge, in Crystal River, Florida. During those health assessments, training has been afforded to many participants. That study has successfully captured and handled over 200 manatees. Our team has experience in successfully handling more than 1100 wild, healthy manatees. The data gathered has provided baseline information on manatee health, reproductive status, and nutritional condition. Additional manatee health assessments have been coupled with other collaborative research projects in others parts of Florida, Puerto Rico, Cuba, Belize, and Mexico.
Future Steps: Additional health assessments are planned for manatee populations at different locations, with emphases focused along the Gulf of Mexico. These studies will establish the baseline biological, nutritional, and medical data necessary for future comparative studies addressing life history parameters and habitat carrying capacity issues. Genetics will continue to be used as a tool to address fitness and re-sighting capabilities in future generations of manatees. Collaboration with the USGS partners will be encouraged in order to advance our understanding of the biology of this endangered species.
Related Project(s):
USFWS Florida and Puerto Rico Manatee Recovery Plans, USFWS West Indian Manatee 5-Year Review: Summary and Evaluation, USGS Manatee Individual Photo-identification System, Florida’s Manatee Carcass Recovery and Necropsy Program, USFWS Manatee Rescue, Rehabilitation, and Release Program.
Below are publications associated with this project.
Diet of the Antillean manatee (Trichechus manatus manatus) in Belize, Central America
Morphometric body condition indices of wild Florida manatees (Trichechus manatus latirostris)
Baseline reference range for trace metal concentrations in whole blood of wild and managed West Indian Manatees (Trichechus manatus) in Florida and Belize
Seasonal response of ghrelin, growth hormone, and insulin-like growth factor I in the free-ranging Florida manatee (Trichechus manatus latirostris)
Twenty-six years of post-release monitoring of Florida manatees (Trichechus manatus latirostris): evaluation of a cooperative rehabilitation program
Variation in the hindgut microbial communities of the Florida manatee, Trichechus manatus latirostris over winter in Crystal River, Florida
Blood mineral concentrations in manatees (Trichechus manatus latirostris and Trichechus manatus manatus)
Diversidad haplotípica en el manatí Trichechus manatus en Cuba: resultados preliminares
Biomedical health assessments of the Florida manatee in Crystal River - providing opportunities for training during the capture, handling, and processing of this endangered aquatic mammal
Disseminated toxoplasmosis in Antillean manatees Trichechus manatus manatus from Puerto Rico
Health assessment of captive and wild-caught West Indian manatees (Trichechus manatus)
Health assessment and seroepidemiologic survey of potential pathogens in wild Antillean manatees (Trichechus manatus manatus)
Below are news stories associated with this project.
- Overview
A multi-agency effort assesses the health of manatees and provides baseline information on their health, reproductive status, and nutritional condition.
Manatee in a Florida spring The Science Issue and Relevance: Federal and state researchers have been involved in manatee (Trichechus manatus) biomedical health assessment programs for a couple of decades. Biologists and veterinarians have implemented training and encouraged multi-agency participation whenever possible to ensure consistency in data acquisition, recording, sample collection, publication integrity, and archival standards. Under the U.S. Fish and Wildlife Service Research Permit (MA791721) granted to the U.S. Geological Survey (USGS) Sirenia Project, federal biologists and collaborators are allowed to conduct up to 10 physiological research studies on wild and captive manatees detailing various aspects of their biology. This research initiative addresses concerns and priorities outlined in the Florida Manatee Recovery Plan. The assessment teams strive to continue this collaborative effort to help advance our understanding of health-related issues confronting the manatee throughout their range.
Methodology for Addressing the Issue: Researchers with the project have been collaborating on numerous studies over the last several years. One extensive study, initiated in 2006, has focused on health and fitness of the winter manatee population located in the Crystal River National Wildlife Refuge, in Crystal River, Florida. During those health assessments, training has been afforded to many participants. That study has successfully captured and handled over 200 manatees. Our team has experience in successfully handling more than 1100 wild, healthy manatees. The data gathered has provided baseline information on manatee health, reproductive status, and nutritional condition. Additional manatee health assessments have been coupled with other collaborative research projects in others parts of Florida, Puerto Rico, Cuba, Belize, and Mexico.
Health assessment of a manatee Future Steps: Additional health assessments are planned for manatee populations at different locations, with emphases focused along the Gulf of Mexico. These studies will establish the baseline biological, nutritional, and medical data necessary for future comparative studies addressing life history parameters and habitat carrying capacity issues. Genetics will continue to be used as a tool to address fitness and re-sighting capabilities in future generations of manatees. Collaboration with the USGS partners will be encouraged in order to advance our understanding of the biology of this endangered species.
Related Project(s):
USFWS Florida and Puerto Rico Manatee Recovery Plans, USFWS West Indian Manatee 5-Year Review: Summary and Evaluation, USGS Manatee Individual Photo-identification System, Florida’s Manatee Carcass Recovery and Necropsy Program, USFWS Manatee Rescue, Rehabilitation, and Release Program.
- Publications
Below are publications associated with this project.
Filter Total Items: 37Diet of the Antillean manatee (Trichechus manatus manatus) in Belize, Central America
Belize contains important habitat for Antillean manatees (Trichechus manatus manatus) and provides refuge for the highest known population density of this subspecies. As these animals face impending threats, knowledge of their dietary habits can be used to interpret resource utilization. The contents of 13 mouth, 6 digestive tract (stomach, duodenum and colon), and 124 fecal samples were microscopAuthorsAarin Conrad Allen, Cathy A. Beck, Robert K. Bonde, James A. Powell, Nicole Auil GomezMorphometric body condition indices of wild Florida manatees (Trichechus manatus latirostris)
In many species, body weight (W) increases geometrically with body length (L), so W/L3 provides a body condition index (BCI) that can be used to evaluate nutritional status once a normal range has been established. No such index has been established for Florida manatees (Trichechus manatus latirostris). This study was designed to determine a normal range of BCIs of Florida manatees by comparing WAuthorsLauren T. Harshaw, Iskande V. Larkin, Robert K. Bonde, Charles J. Deutsch, Richard C. HillBaseline reference range for trace metal concentrations in whole blood of wild and managed West Indian Manatees (Trichechus manatus) in Florida and Belize
The West Indian manatee (Trichechus manatus) is exposed to a number of anthropogenic influences, including metals, as they inhabit shallow waters with close proximity to shore. While maintaining homeostasis of many metals is crucial for health, there is currently no baseline reference range that can be used to make clinical and environmental decisions for this endangered species. In this study, whAuthorsNoel Y. Takeuchi, Michael T. Walsh, Robert K. Bonde, James A. Powell, Dean A. Bass, Joseph C. Gaspard, David S. BarberSeasonal response of ghrelin, growth hormone, and insulin-like growth factor I in the free-ranging Florida manatee (Trichechus manatus latirostris)
Seasonal changes in light, temperature, and food availability stimulate a physiological response in an animal. Seasonal adaptations are well studied in Arctic, Sub-Arctic, and hibernating mammals; however, limited studies have been conducted in sub-tropical species. The Florida manatee (Trichechus manatus latirostris), a sub-tropical marine mammal, forages less during colder temperatures and mayAuthorsRachel L Tighe, Robert K. Bonde, Julie P. AveryTwenty-six years of post-release monitoring of Florida manatees (Trichechus manatus latirostris): evaluation of a cooperative rehabilitation program
The rescue, rehabilitation, and release of Florida manatees (Trichechus manatus latirostris) into the wild has occurred since 1974; however, a comprehensive evaluation of the outcomes of the releases has never been conducted. Herein, we examined data for 136 Florida manatees that were rehabilitated and released with telemetry tags between 1988 and 2013 to determine release outcome of each individuAuthorsNicole M. Adimey, Monica Ross, Madison Hall, James P. Reid, Margie E. Barlas, Lucy W Keith Diagne, Robert K. BondeVariation in the hindgut microbial communities of the Florida manatee, Trichechus manatus latirostris over winter in Crystal River, Florida
The Florida manatee, Trichechus manatus latirostris, is a hindgut-fermenting herbivore. In winter, manatees migrate to warm water overwintering sites where they undergo dietary shifts and may suffer from cold-induced stress. Given these seasonally induced changes in diet, the present study aimed to examine variation in the hindgut bacterial communities of wild manatees overwintering at Crystal RivAuthorsSamuel D. Merson, Diane Ouwerkerk, Lisa-Maree Gulino, Athol Klieve, Robert K. Bonde, Elizabeth A. Burgess, Janet M. LanyonBlood mineral concentrations in manatees (Trichechus manatus latirostris and Trichechus manatus manatus)
Limited information is available regarding the role of minerals and heavy metals in the morbidity and mortality of manatees. Whole-blood and serum mineral concentrations were evaluated in apparently healthy, free-ranging Florida (Trichechus manatus latirostris, n = 31) and Belize (Trichechus manatus manatus, n = 14) manatees. Toxicologic statuses of the animals and of their environment had not beeAuthorsJ. Siegal-Willott, Kendal E. Harr, Jeffery O. Hall, Lee-Ann C. Hayek, Nicole Auil-Gomez, James A. Powell, Robert K. Bonde, Darryl HeardDiversidad haplotípica en el manatí Trichechus manatus en Cuba: resultados preliminares
The aim of this analysis was to obtain information regarding the mtDNA haplotype composition of the manatee (T. manatus) occupying the Cuban archipelago. A fragment of 410 bp of the non-coding region was analyzed for 12 individual manatees from Cuba and one from Florida, USA. Only two haplotypes were identified. Haplotype A1, found exclusively in Florida (including in the sample analyzed here) butAuthorsDamir Hernandez-Martinez, Anmari Alvarez-Aleman, Robert K. Bonde, James A. Powell, Erik Garcia-MachadoBiomedical health assessments of the Florida manatee in Crystal River - providing opportunities for training during the capture, handling, and processing of this endangered aquatic mammal
Federal and state researchers have been involved in manatee (Trichechus manatus) biomedical health assessment programs for a couple of decades. These benchmark studies have provided a foundation for the development of consistent capture, handling, and processing techniques and protocols. Biologists have implemented training and encouraged multi-agency participation whenever possible to ensure reliAuthorsRobert K. Bonde, Andrew Garrett, Michael Belanger, Nesime Askin, Luke Tan, Carin WittnichDisseminated toxoplasmosis in Antillean manatees Trichechus manatus manatus from Puerto Rico
Necropsies were conducted on 4 Antillean manatees Trichechus manatus manatus that were stranded in single events on the coastal beaches of Puerto Rico from August 2010 to August 2011. Three manatees were emaciated and the gastrointestinal tracts were devoid of digesta. Microscopically, all manatees had severe widespread inflammatory lesions of the gastrointestinal tract and heart with intralesionaAuthorsGregory D. Bossart, Antonio A. Mignucci-Ginannoni, Antonio L. Rivera-Guzman, Nilda M. Jimenez-Marrero, Alvin C. Camus, Robert K. Bonde, Jitender P. Dubey, John S. ReifHealth assessment of captive and wild-caught West Indian manatees (Trichechus manatus)
No abstract available.AuthorsM. Andrew Stamper, Robert K. BondeHealth assessment and seroepidemiologic survey of potential pathogens in wild Antillean manatees (Trichechus manatus manatus)
The Antillean manatee (Trichechus manatus manatus), a subspecies of the West Indian manatee, inhabits fresh, brackish, and warm coastal waters distributed along the eastern border of Central America, the northern coast of South America, and throughout the Wider Caribbean Region. Threatened primarily by human encroachment, poaching, and habitat degradation, Antillean manatees are listed as endangerAuthorsKathryn Sulzner, Christine Kreuder Johnson, Robert K. Bonde, Nicole Auil Gomez, James Powell, Klaus Nielsen, M. Page Luttrell, A.D.M.E. Osterhaus, A. Alonso Aguirre - News
Below are news stories associated with this project.