Puerto Rico and Florida manatees represent genetically distinct groups

@article{Hunter2012PuertoRA,
  title={Puerto Rico and Florida manatees represent genetically distinct groups},
  author={Margaret E. Hunter and Antonio A. Mignucci-Giannoni and Kimberly Pause Tucker and Tim L. King and Robert K. Bonde and Brian A. Gray and P. Mcguire},
  journal={Conservation Genetics},
  year={2012},
  volume={13},
  pages={1623-1635}
}
The West Indian manatee (Trichechus manatus) populations in Florida (T.m.latirostris) and Puerto Rico (T. m. manatus) are considered distinct subspecies and are listed together as endangered under the United States Endangered Species Act. Sustained management and conservation efforts for the Florida subspecies have led to the suggested reclassification of the species to a threatened or delisted status. However, the two populations are geographically distant, morphologically distinct, and… 

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References

SHOWING 1-10 OF 97 REFERENCES

Phylogeography of the West Indian manatee (Trichechus manatus): how many populations and how many taxa?

TLDR
Despite the manatee’s ability to move thousands of kilometres along continental margins, strong population separations between most locations were demonstrated with significant haplotype frequency shifts, consistent with tagging studies which indicate that stretches of open water and unsuitable coastal habitats constitute substantial barriers to gene flow and colonization.

Low genetic variation and evidence of limited dispersal in the regionally important Belize manatee

TLDR
A comprehensive molecular investigation of the genetic diversity, relatedness and population structure of the Belize manatee population was conducted using mitochondrial and microsatellite DNA, indicating that separate protection of these two groups would best preserve the region’s diversity.

Evidence of two genetic clusters of manatees with low genetic diversity in Mexico and implications for their conservation

TLDR
The genetic structure, using microsatellites, shows the presence of two populations in Mexico: the Gulf of Mexico (GMx) and Chetumal Bay (ChB) on the Caribbean coast, with a zone of admixture in between, and suggests limited or unidirectional gene flow between these two important areas.

Low genetic diversity and minimal population substructure in the endangered Florida manatee: implications for conservation

TLDR
Although genetic issues, as inferred by neutral genetic markers, appear not to be critical at present, the Florida manatee continues to face demographic challenges due to anthropogenic activities and stochastic factors such as red tides, oil spills, and disease outbreaks; these can further reduce genetic diversity of the manatese population.

INTERSPECIFIC AND INTRASPECIFIC MORPHOLOGICAL VARIATION IN MANATEES (SIRENIA: TRICHECHUS)

The three living species of Trichechus are clearly defined and well exemplify the degree of variability and taxonomic value of morphological characters in a well-understood mammalian genus.

Regional Management Plan for the West Indian Manatee, Trichechus manatus

As truly aquatic herbivorous mammals, West Indian manatees (Trichechus manatus) occupy a specialized niche in the ecosystem. The uniqueness of their niche render them susceptible to

Manatee Mortality in Puerto Rico

TLDR
A reduction in anthropogenic mortality of this endangered species can be accomplished only through education and a proactive management and conservation plan that includes law enforcement, mortality assessment, scientific research, rescue and rehabilitation, and inter- and intraagency cooperation.

FOSSIL SIRENIA OF THE WEST ATLANTIC AND CARIBBEAN REGION. VII. PLEISTOCENE TRICHECHUS MANATUS LINNAEUS, 1758

Abstract All known Pleistocene fossils of manatees from North America are conspecific with the living West Indian manatee, Trichechus manatus. However, those of late Pleistocene (late Rancholabrean)

First report of a Florida Manatee (Trichechus manatus latirostris) in Cuba

Manatees (Trichechus manatus latirostris) in Florida utilize intake and effluent canals of power plants as resting and thermoregulatory habitat. We report the use of a power plant canal in Cuba by a

Polymorphic microsatellite DNA markers for the Florida manatee (Trichechus manatus latirostris)

TLDR
Ten polymorphic microsatellite loci with an average of 4.2 alleles per locus, and average heterozygosity of 50.1%.
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