Mignucci-Giannoni, Antonio A.: SEE ALSO Falcón et al., 2003; Garcia-Rodriguez et al., 1998; Jiménez-Marrero et al., 1998; Montoya et al., 2001; Morales-V. et al., 2003; Williams et al., 2003.
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Mignucci-Giannoni, Antonio A.
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1998 |
Marine mammal captivity in the northeastern Caribbean, with notes on the rehabilitation of stranded whales, dolphins, and manatees.
Carib. Jour. Sci.
34(3-4): 191-203.
–Spanish summ.
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Mignucci-Giannoni, Antonio A.; Beck, Cathy A.
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1998 |
The diet of the manatee (Trichechus manatus) in Puerto Rico.
Mar. Mamm. Sci.
14(2): 394-397. 1 tab. Mar. 31, 1998.
–Stomach contents of 8 manatees included mainly Thalassia testudinum, Halodule wrightii, and Syringodium filiforme, with small amounts of mangroves, algae, hydroids, and ascidians.
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Falcón-Matos, Limarie; Mignucci-Giannoni, Antonio A.; Toyos-Gonzáles, Gian M.; Bossart, Gregory D.; Meisner, René A.; Varela, René A.
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2003 |
Evidence of a shark attack on a West Indian manatee (Trichechus manatus) in Puerto Rico.
Jour. Neotropical Mammalogy (Mastozoologia Neotropical)
10(1): 6-11. 1 fig. Jan.-June 2003.
–Spanish summ. Reports healed scars from a bite of a large shark (probably a tiger shark, Galeocerdo cuvier) on an adult female manatee that died of intestinal impaction and respiratory distress of uncertain relation to the shark bite. This is the first confirmed report of an ante-mortem shark attack on a manatee.
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Mignucci-Giannoni, Antonio A.; Montoya-Ospina, Ruby A.; Velasco-Escudero, Mario
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2003 |
Status of semi-captive manatees in Jamaica.
Latin Amer. Jour. Aquat. Mamms.
2(1): 7-12. 3 figs. Jan./June 2003.
–Spanish summ. Reports on the captivity of 4 female manatees in the Alligator Hole River, Jamaica, since 1981. As of June 2003, three of these were thought to still survive; their release and radiotracking is recommended.
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Vianna, Juliana A.; Bonde, Robert K.; Caballero, Susana; Giraldo, Juan Pablo; Pinto de Lima, Régis; Clark, Annmarie; Marmontel, Miriam; Morales-Vela, Benjamín; Souza, Maria José de; Parr, Leslee; Rodríguez-Lopez, Marta A.; Mignucci-Giannoni, Antonio A.; Powell, James Arthur, Jr.; Santos, Fabrício R.
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2006 |
Phylogeography, phylogeny and hybridization in trichechid sirenians: implications for manatee conservation.
Molec. Ecol.
15: 433-447. 4 tabs. 4 figs.
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Mignucci-Giannoni, Antonio A.
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2010 |
El manatí de Puerto Rico.
San Juan, Red Caribeña de Varamientos & Univ. Interamericana de Puerto Rico:
iv + 56. Illus.
–Informative children's book, well illustrated with color photos, on the natural history and conservation of TM in Puerto Rico.
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Bossart, Gregory D.; Mignucci-Giannoni, Antonio A.; Rivera-Guzman, Antonio L.; Jimenez-Marrero, Nilda M.; Camus, Alvin C.; Bonde, Robert K.; Dubey, Jitender P.; Reif, John S.
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2012 |
Disseminated toxoplasmosis in Antillean manatees (Trichechus manatus manatus) from Puerto Rico.
Diseases of Aquatic Organisms
101: 139-144. 3 figs. doi: 10.3354/dao02526 Nov. 8, 2012.
–Available at: http://www.int-res.com/abstracts/dao/v101/n2/p139-144/
ABSTRACT: 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 gastro-intestinal tract and heart with intralesional tachyzoites consistent with Toxoplasma gondii identified by histological, ultrastructural and immunohistochemical techniques. The gastrointestinal lesions included severe, multifocal to diffuse, chronic-active enteritis, colitis and/or gastritis often with associated ulceration, necrosis and hemorrhage. Enteric leiomyositis was severe and locally extensive in all cases and associated with the most frequently observed intralesional protozoans. Moderate to severe, multifocal, chronic to chronic-active, necrotizing myocarditis was also present in all cases. Additionally, less consistent inflammatory lesions occurred in the liver, lung and a mesenteric lymph node and were associated with fewer tachyzoites. Sera (n = 30) collected from free-ranging and captive Puerto Rican manatees and a rehabilitated/released Puerto Rican manatee from 2003 to 2012 were tested for antibodies for T. gondii. A positive T. gondii antibody titer was found in 2004 in 1 (3%) of the free-ranging cases tested. Disease caused by T. gondii is rare in manatees. This is the first report of toxoplasmosis in Antillean manatees from Puerto Rico. Additionally, these are the first reported cases of disseminated toxoplasmosis in any sirenian. The documentation of 4 cases of toxoplasmosis within one year and the extremely low seroprevalence to T. gondii suggest that toxoplasmosis may be an emerging disease in Antillean manatees from Puerto Rico.
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Hunter, Margaret E.; Mignucci-Giannoni, Antonio A.; Pause Tucker, Kimberly C.; King, Timothy L.; Bonde, Robert K.; Gray, Brian A.; McGuire, Peter M.
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2012 |
Puerto Rico and Florida manatees represent genetically distinct groups.
Conserv. Genet.
13(6): 1623-1635. 3 tabs. 4 figs. + online supplemental material. DOI 10.1007/s10592-012-0414-2 Dec. 2012 (publ. online Oct. 7, 2012).
–ABSTRACT: 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 habitat degradation and boat strikes continue to threaten the Puerto Rico population. Here, 15 microsatellite markers and mitochondrial control region sequences were used to determine the relatedness of the two populations and investigate the genetic diversity and phylogeographic organization of the Puerto Rico population. Highly divergent allele frequencies were identified between Florida and Puerto Rico using microsatellite (F ST = 0.16; R ST = 0.12 (P < 0.001)) and mitochondrial (F ST = 0.66; Ф ST = 0.50 (P < 0.001)) DNA. Microsatellite Bayesian cluster analyses detected two populations (K = 2) and no admixture or recent migrants between Florida (q = 0.99) and Puerto Rico (q = 0.98). The microsatellite genetic diversity values in Puerto Rico (HE = 0.45; NA = 3.9), were similar, but lower than those previously identified in Florida (HE = 0.48, NA = 4.8). Within Puerto Rico, the mitochondrial genetic diversity values (π = 0.001; h = 0.49) were slightly lower than those previously reported (π = 0.002; h = 0.54) and strong phylogeographic structure was identified (F ST global = 0.82; Ф ST global = 0.78 (P < 0.001)). The genetic division with Florida, low diversity, small population size (N = 250), and distinct threats and habitat emphasize the need for separate protections in Puerto Rico. Conservation efforts including threat mitigation, migration corridors, and protection of subpopulations could lead to improved genetic variation in the endangered Puerto Rico manatee population.
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Satizabal, Paula Mignucci-Giannoni, Antonio A. Duchene, Sebastian Caicedo-Herrera, Dalila Perea-Sicchar, Carlos M. Garcia-Davila, Carmen R. Trujillo, Fernando Caballero, Susana J.
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2012 |
Phylogeography and Sex-Biased Dispersal across Riverine Manatee Populations (Trichechus inunguis and Trichechus manatus) in South America.
PLOS ONE
7(12). 4 tables. 4 figures.DOI: 10.1371/journal.pone.0052468. December 20, 2012.
–ABSTRACT: Phylogeographic patterns and sex-biased dispersal were studied in riverine populations of West Indian (Trichechus manatus) and Amazonian manatees (T. inunguis) in South America, using 410bp D-loop (Control Region, Mitochondrial DNA) sequences and 15 nuclear microsatellite loci. This multi-locus approach was key to disentangle complex patterns of gene flow among populations. D-loop analyses revealed population structuring among all Colombian rivers for T. manatus, while microsatellite data suggested no structure. Two main populations of T. inunguis separating the Colombian and Peruvian Amazon were supported by analysis of the D-loop and microsatellite data. Overall, we provide molecular evidence for differences in dispersal patterns between sexes, demonstrating male-biased gene flow dispersal in riverine manatees. These results are in contrast with previously reported levels of population structure shown by microsatellite data in marine manatee populations, revealing low habitat restrictions to gene flow in riverine habitats, and more significant dispersal limitations for males in marine environments.
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Bibliography and Index of the Sirenia and Desmostylia 