Keywords
mamíferos marinos, mortalidad, conservación, cacería ilegal, áreas protegidas.
How to Cite
Abstract
Introduction: Marine mammal strandings can be used to determine the impacts of anthropogenic activity on the species survival, population health, and levels of environmental pollution in ecosystems. In addition, these data can help design conservation and management strategies as well as identify priority areas for the species. The West Indian manatee (Trichechus manatus) is listed as endangered throughout its range. In Guatemala, it is distributed along the Caribbean coast. Anthropogenic activities appear to be having a direct pressure on the species, affecting the status of the population.
Objective: The general purpose of this study was to analyze the 30 years of documented manatee stranding reports available for Guatemala. Two specific objectives were defined to: 1) conduct a spatial analysis of manatee strandings to identify the areas of high stranding concentration, and 2) determine whether there were sex differences in the number of strandings.
Methods: Characteristics and areas of concentration of manatee strandings were described along the Caribbean coast between 1992 to 2022. Sites with the highest probable density of strandings were identified using a Kernel density analysis. We compared the number of stranding events that occurred in each protected area that included manatees in their management plans and each municipality of Izabal. We determined whether there were sex differences in the number of stranded manatees. We use the potential biological removal to estimate the maximum number of manatees that can be removed from the population due to anthropogenic causes without negatively impacting species survival.
Results: Forty-three manatee stranding events were recorded throughout the species’ range in Guatemala (48 total individuals). The sites with the highest predicted density of strandings were Santo Tomás de Castilla bay, followed by Lake Izabal (including the limits of the Refugio de Vida Silvestre Bocas del Polochic) and Parque Nacional Río Dulce. The majority of the cases were registered in protected areas (60 %). Estimates of potential biological removal were equivalent to less than one manatee per year, which was exceeded by the annual average of stranded manatees recorded (three manatees).
Conclusions: Anthropogenic activities cause mortality of manatees in this region, despite the implementation of protected areas. Poaching was identified as the main cause of manatee mortality in Guatemala. The implementation of management strategies focused on minimizing threats to the species, based on the application of environmental legislation and environmental awareness, is essential. The creation and implementation of a protocol for the stranding of marine mammals on the Caribbean coast of Guatemala is necessary, in order to obtain standardized records of these events and conduct rescue efforts and releases when possible.
References
Archie, E. A., & Chiyo, P. I. (2012). Elephant behaviour and conservation: social relationships, the effects of poaching, and genetic tools for management. Molecular Ecology, 21, 765–778. https://doi: 10.1111/j.1365-294X.2011.05237.x
Arrivillaga, A., & Baltz, D. M. (1999). Comparison of fishes and macroinvertebrates on seagrass and bare-sand sites on Guatemala’s Atlantic coast. Bulletin of Marine Science, 65, 301–319.
Bedriñana-Romano, L., Hucke-Gaete, R., Viddi, F. A., Johnson, D. S., Zerbini, A. N., Morales, J., Mate, B., & Palacios, D. M. (2021). Defining priority areas for blue whale conservation and investigating overlap with vessel traffic in Chilean Patagonia, using a fast-fitting movement model. Scientific Reports, 11, 2709. https://doi.org/10.1038/s41598-021-82220-5
Bonde, R. K., & Potter, C. W. (1995). Manatee butchering sites in Port Honduras. Sirenews, 24, 7.
Calleson, C. S., & Frohlich, R. K. (2007). Slower boat speeds reduce risk to manatees. Endangered Species Research, 3, 295–304. https://doi.org/10.3354/esr00056
CONAP, (Consejo Nacional de Áreas Protegidas). (2019). Parque Nacional Río Dulce – PNRD, Segunda Actualización Plan Maestro. Resolución 243/2019 [Technical document 33-2019]. Consejo Nacional de Áreas Protegidas.
Corona-Figueroa, M. F. (2012). Uso y preferencia de hábitat del manatí antillano (Trichechus manatus manatus) en el Parque Nacional Río Dulce, Izabal, Guatemala. [Unpublished thesis of Licenciatura]. Universidad de San Carlos de Guatemala.
Diario de Centro América. (1981). Organismo Ejecutivo. Ministerio de Agricultura. Guatemala, 17 de diciembre de 1981 (No. 81, Tomo CCXII. 1503-1504).
Diario de Centro América. (2021). Consejo Nacional de Áreas Protegidas. Resolución 04-09-2021 sobre la Actualización de la Lista de Especies Amenazadas en Guatemala (No. 04-09–2021; p. No. 53. Tomo CCXVII. 2-8).
Del Valle, F. (2001). Evaluación del área de distribución de la población de manatí (Trichechus manatus L.) Trichechidae-Sirenia en Guatemala y sus principales amenazas. [Unpublished thesis of Licenciatura]. Universidad de San Carlos de Guatemala.
Del Valle, F. (2002). Protocolo de monitoreo para el manatí (Trichechus manatus, L.). Fundación Defensores de la Naturaleza (FDN). National Fish and Wildlife Foundation (NFWF).
Fundación Defensores de la Naturaleza. (2003). Plan Maestro 2003-2007 Refugio de Vida Silvestre Bocas del Polochic. Consejo Nacional de Áreas Protegidas. Fundación Defensores de la Naturaleza. https://defensores.org.gt/wp-content/uploads/2021/06/Plan-Maestro-RVSBP.pdf
Fundación para el Ecoderarrollo y la Conservación. (2009). Plan Maestro 2010-2014 Área de Uso Múltiple Río Sarstún. Consejo Nacional de Áreas Protegidas. Fundación para el Ecodesarrollo y la Conservación. Asociación Amantes de la Tierra.
Fundación Mario Dary Rivera, Consejo Nacional de Áreas Protegidas, & The Nature Conservancy. (2006). Plan Maestro 2007-2011 Refugio de Vida Silvestre Punta de Manabique. Consejo Nacional de Áreas Protegidas. CONAP. https://conap.gob.gt/wp-content/uploads/2019/10/PM-RVS-Punta-de-Manabique.pdf
Galves, J., Galves, C., Auil Gomez, N., Bonde, R. K., Powell, J. A., Alvarez-Alemán, A., & Castelblanco-Martínez, D. N. (2022). Analysis of a long-term dataset of Antillean manatee strandings in Belize: implications for conservation. Oryx, 1–9. https://doi.org/10.1017/S0030605321000983
Geraci, J. R., Lounsbury, V. J., & Yates, N (2005). Marine Mammals Ashore: A Field Guide for Strandings(2nd ed.) National Aquarium in Baltimore.
Ginsberg, J. R., & Milner-Gulland, E. J. (1994). Sex biased harvesting and population dynamics in ungulates: implications for conservation and sustainable use. Conservation Biology, 8, 157–166. https://www.jstor.org/stable/2386730
Hartman, D. (1979). Ecology and behavior of the manatee (Trichechus manatus) in Florida: Vol. Special Publication (p. 153). The American Society of Mammalogists.
Hayne, D. W. (1949). Calculation of size of home range. Journal of Mammalogy, 30, 1–18. https://doi.org/10.2307/1375189
Herrera, F., Sandoval, K., & Quintana-Rizzo, E. (2004). Estrategia nacional para la conservación del manatí. Documento Técnico No. 13 (02-2004). Consejo Nacional de Áreas Protegidas.
Instituto Guatemalteco de Turismo (INGUAT) (2015). Boletín anual de estadísticas de turismo. Gobierno de Guatemala.
Ixquiac, M., Corona, A., García, B., Salazar, M., Tejeda, C., Rodas, R., Juárez, E., & Hernández, C. (2008). Evaluación y manejo de las comunidades demersales de la Bahía de Amatique Izabal, Guatemala. Estimación de los impactos pesqueros. Universidad de San Carlos de Guatemala. https://digi.usac.edu.gt/bvirtual/informes/puirna/INF-2008-090.pdf
Jones, T., Cusack, J. J., Pozo, R. A., Smit, J., Mkuburo, L., Baran, P., Lobora, A. L., Mduma, S., & Foley, C. (2018). Age structure as an indicator of poaching pressure: Insights from rapid assessments of elephant populations across space and time. Ecological Indicators, 88, 115–125. https://10.1016/j.ecolind.2018.01.030
Laist, D. W., & Shaw, C. (2006). Preliminary evidence that boat speed restrictions reduce deaths of Florida manatees. Marine Mammal Science, 22, 472–479. https://doi.org/10.1111/j.1748-7692.2006.00027.x
Lefebvre, L. W., O’Shea, T. J., Rathbun, G. B., & Best, R. C. (1989). Distribution, status, and biogeography of the West Indian manatee. In C. A. Woods (Ed.), Biogeography of the West Indies – Past, present, and future (pp. 567–610). Sandhill Crane Press.
Lightsey, J. D., Rommel, S., Costidis, A., & Pitchford, T. (2006). Gross necropsy diagnosis of watercraft-related mortality in the Florida manatee (Trichechus manatus latirostris). Journal of Zoo and Wildlife Medicine, 37, 262–275. https://doi.org/10.1638/04-095.1
MacDonald, B. D. (2011). Análisis de la diversidad de las praderas de pastos marinos en la laguna marino-costera de la Bahía La Graciosa, Izabal, Guatemala [Unpublished thesis of Licenciatura]. Universidad de San Carlos de Guatemala.
Machuca-Coronado, O. H., & Quintana-Rizzo, E. (2014). Primer caso de rehabilitación de una cría de manatí (Trichecus manatus) en Guatemala. Fundación Defensores de la Naturaleza. Guatemala.
Machuca-Coronado, O. H., & Corona-Figueroa, M. F. (2019). El manatí antillano Trichecus manatus manatus (Sirenia: Trichehidae) en Guatemala: amenazas y procesos de conservación. In C. Kraker, A. P. Calderón, & A. A. Cabrera (Eds.), Perspectivas de investigación sobre los mamíferos silvestres de Guatemala (pp. 188–200). Asociación Guatemalteca de Mastozoólogos.
Marine Traffic. (2022). Puerto Santo Tomas. Retrieved August 21, 2022, from https://www.marinetraffic.com/en/ais/details/ports/3040?name=PUERTO-SANTO-TOMAS&country=Guatemala
Marsh, H., Lawler, I. R., Kwan, D., Delean, S., Pollock, K., & Alldredge, M. (2004). Aerial surveys and the potential biological removal techniques indicate that the Torres Strait dugong fishery is unsustainable. Animal Conservation Forum, 7, 435–443. https://doi.org/10.1017/S1367943004001635
Marsh, H., O’Shea, T. J., & Reynolds III, J. E. (2011). Ecology and Conservation of Sirenia: Dugongs and Manatees. Cambridge University Press.
Mignucci-Giannoni, A. A., Montoya-Ospina, R. A., Jiménez-Marrero, N. M., Rodríguez-Lopez, M. A., Williams, E. H., & Bonde, R. K. (2000). Manatee mortality in Puerto Rico. Environmental Management, 25, 189–198. https://doi.org/10.1007/s002679910015
Ministerio de Agricultura, Ganadería y Alimentación (2002). Ley General de Pesca y Acuicultura (Decreto 80-2002) y su reglamento (Acuerdo Gubernativo 223-2005). Ministerio de Agricultura, Ganadería y Alimentación, Gobierno de Guatemala.
Morales-Vela, B., Olivera-Gómez, L. D., Reynolds III, J. E., & Rathbun, G. B. (2000). Distribution and hábitat use by manatees (Trichechus manatus manatus) in Belize and Chetumal Bay, México. Biological Conservation, 95, 67–75. https://doi.org/10.1016/S0006-3207(00)00009-4
National Marine Fisheries Service. (2016). Guidelines for Assessing Marine Mammal Stocks. Federal Register. https://www.federalregister.gov/
National Oceanographic and Atmospheric Administration. (2019). Understanding marine wildlife stranding and response. National Oceanic and Atmospheric Administration. https://www.fisheries.noaa.gov/insight/understandingmarine-wildlife-stranding-and-response
Norman, S. A. (2008). Spatial epidemiology and GIS in marine mammal conservation medicine and disease research. Eco-Health, 5, 257–267. https://doi.org/10.1007/s10393-008-0185-x
Onens, P., Wilkin, S., Fauquier, D., Spradlin, T., Manley, S., Hall, L., Greig, D., Brill, K., Smith, A., Garron, M., Fougeres, E., Mase, B., Stratton, E., Wilkinson, K., Viezbick, J., Greenman, J., Keogh, M., Wright, S., Savage, K., Barbieri, M. (2022). Report of Marine Mammal Strandings in the United States: National Overview. National Oceanic and Atmospheric Administration. https://repository.library.noaa.gov/view/noaa/37538
O’Shea, T. J., & Salisbury, C. A. (1991). Belize—a last stronghold for manatees in the Caribbean. Oryx, 25(3), 156–164. https://doi.org/10.1017/S0030605300034189
Powell, J. (2002). Manatees natural history and conservation. World Life Library.
Punt, A. E., Siple, M., Francis, T. B., Hammond, P. S., Heinemann, D., Long, K. J., Moore, J. E., Sepúlveda, M., Reeves, R. R., Sigurðsson, G. M., Vikingsson, G., Wade, P. R., Williams, R., & Zerbini, A. N. (2020). Robustness of potential biological removal to monitoring, environmental, and management uncertainties. ICES Journal of Marine Science, 77, 2491–2507. https://doi.org/10.1093/icesjms/fsaa096
Quintana-Rizzo, E. (1993). Estimación de la distribución y el tamaño poblacional del manatí Trichechus manatus (Trichechidae-Sirenia) en Guatemala [Unpublished thesis of Licenciatura]. Universidad de San Carlos de Guatemala.
Quintana-Rizzo, E. (2005). Distribución y número de manatíes (Trichechus manatus manatus) utilizando la Costa Atlántica de las aguas guatemaltecas. Estudio sinóptico. [Technical report]. University of South Florida.
Quintana-Rizzo, E., & Machuca-Coronado, O. H. (2008). Monitoreo científico para la conservación del manatí y su hábitat. Fundación Defensores de la Naturaleza. Fondo Nacional para la Conservación de la Naturaleza.
Quintana-Rizzo, E., Machuca-Coronado, O. & García, H. A. (2023). Long-term spatiotemporal distribution, abundance, and priority areas for manatees and calves (Trichechus manatus Sirenia: Trichechidae) in Guatemala. Revista de Biología Tropical, 71(S4), e57273. https://doi.org/10.15517/rev.biol.trop..v71iS4.57273
Quintana-Rizzo, E., Machuca-Coronado, O. H., & Walker, Z. (2008). First orphan manatee calf (Trichechus manatus manatus) recovered in Guatemala and transported to Belize for rehabilitation. Sirenews, 50, 11–13.
Quintana-Rizzo, E., & Reynolds III, J. E. (2010). Regional management plan for the West Indian manatee (Trichechus manatus). (p. 168). United Nations Environmental Program (CEP) and Caribbean Environment Programme.
R Core Team. (2021). R: A language and environment for statistical computing [Computer software]. R Foundation for Statistical Computing https://www.R-project.org
Ruiz Valladares, I. E., Cajas Castillo, M. A., Chicas Zea, J. A., & Cajas Castillo, M. M. (2008). Registro de los valores culturales de las comunidades indígenas y no indígenas asentadas en la Costa Atlántica, Izabal, para la conservación del manatí (Trichechus manatus manatus) (p. 68). Fundación Defensores de la Naturaleza.
Runge, M. C., Langtimm, C. A., & Kendall, W. L. (2004). A stage-based model of manatee population dynamics. Marine Mammal Science, 20, 361–385. https://doi.org/10.1111/j.1748-7692.2004.tb01167.x
Self-Sullivan, C., & Mignucci-Giannoni, A. A. (2008). Trichechus manatus ssp. manatus. [e.T22105A9359161]. The IUCN Red List of Threatened Species. https://doi.org/10.2305/IUCN.UK.2008.RLTS.T22105A9359161.en
Suárez, G. A. (2011). Cuencas hidrográficas de Guatemala. Ministerio de Ambiente. Gobierno de Guatemala. http://www.sintet.net/biblioteca/cuencas-hidrograficas-de-guatemala-2011
Taylor, B. L., Wade, P. R., De Master, D. P., & Barlow, J. (2000). Incorporating uncertainty into management models for marine mammals. Conservation Biology, 14, 1243–1252. https://doi.org/10.1046/j.1523-1739.2000.99409.x
UNEP-WCMC, & IUCN. (2021). Protected Planet: The World Database on Protected Areas (WDPA). UNEP-WCMC and IUCN. www.protectedplanet.net
Van der Hoop, J. M., Moore, M. J., Barco, S. G., Cole, T. V., Daoust, P. Y., Henry, A. G., McAlpine, D. F., McLellan, W. A., Wimmer, T., & Solow, A. R. (2013). Assessment of management to mitigate anthropogenic effects on large whales. Conservation Biology, 7, 121–133. https://doi.org/10.1111/j.1523-1739.2012.01934.x
Wade, P. R. (1998). Calculating limits to the allowable human-caused mortality of cetaceans and pinnipeds. Marine Mammal Science, 14, 1–37. https://doi.org/10.1111/j.1748-7692.1998.tb00688.x
Williams, R., Thomas, L., Ashe, E., Clark, C. W., & Hammond, P. S. (2016). Gauging allowable harm limits to cumulative, sub-lethal effects of human activities on wildlife: A case-study approach using two whale populations. Marine Policy, 70, 58–64. https://doi.org/10.1016/j.marpol.2016.04.023
World Wildlife Fund (WWF). (2018). Protocolo de atención de varamientos y rescate de fauna marina.
Worton, B. J. (1989). Kernel methods for estimating the utilization distribution in home-range studies. Ecology, 70, 164–168. https://doi.org/10.2307/1938423
Yáñez-Arancibia, A., Zárate Lomelí, D., Gómez Cruz, M., Godínez Orantes, R., & Santiago Fandiño, V. (1999). The ecosystem framework for planning and management the Atlantic coast of Guatemala. Ocean & Coastal Management, 42, 283–317.https://doi.org/10.1016/S0964-5691(98)00058-1
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