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26 resultados encontrados para: AUTOR: Padilla Saldívar, Janneth A
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1.
- Artículo de divulgación
Planes ambientales institucionales, ¿para qué sirven?
Torrescano Valle, Nuria ; Padilla Saldívar, Janneth A. (coaut.) (1971) ;
Contenido en: AGUA en Quintana Roo No. 1D (enero-marzo 2018), p. 5-10
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2.
- Artículo de divulgación

3.
- Artículo con arbitraje
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Resumen en: Español | Inglés |
Resumen en español

Se presenta una revisión de las especies de mamíferos acuáticos para el Caribe Mexicano. Un gran número de fuentes publicadas fueron consultadas para buscar información sobre mamíferos acuáticos reportados para el Caribe Mexicano. Además, se consultaron 29 colecciones y museos nacionales e internacionales. Basados en documentos, colecciones, registros directos y noticias locales, el presente trabajo reporta la presencia de 18 especies de mamíferos acuáticos en el área de estudio [Tursiops truncatus, Stenella clymene, S. frontalis, S. longirostris, Steno bredanensis, Grampus griseus, Globicephala macrorhynchus, Peponocephala electra; Pseudorca crassidens, Orcinus orca, Physeter macrocephalus, Kogia breviceps, K. sima, Ziphius cavirostris, Mesoplodon europaeus, Trichechus manatus manatus, Lontra longicaudis annectens and Monachus tropicalis (extincta)]. Para obtener información de línea de base que permita un manejo eficiente a largo plazo de este recurso, se recomienda realizar censos poblacionales regulares y sistemáticos de la comunidad de mamíferos acuáticos. Se sugiere a la comunidad de mastozoólogos marinos utilizar al “Caribe Mexicano” como una unidad separada de manejo y conservación, a diferencia de cómo es usualmente incluida en la macro-región “Golfo de México/Caribe Mexicano”.

Resumen en inglés

We present a review of the aquatic mammal species occurring in the Mexican Caribbean. Several published sources were reviewed to find information about aquatic mammals reported for the Mexican Caribbean. Additionally, we consulted 29 national and international collections and museums. Based on documents, collections, direct records and local news, we analyzed 18 confirmed species of aquatic mammals for the study area [Tursiops truncatus, Stenella clymene, S. frontalis, S. longirostris, Steno bredanensis, Grampus griseus, Globicephala macrorhynchus, Peponocephala electra; Pseudorca crassidens, Orcinus orca, Physeter macrocephalus, Kogia breviceps, K. sima, Ziphius cavirostris, Mesoplodon europaeus, Trichechus manatus manatus, Lontra longicaudis annectens and Monachus tropicalis (extinct)]. In order to gather solid baseline information that enhances efficient long-term management, regular and systematic population censuses of the aquatic mammal community are recommended. We recommend the use of the “Mexican Caribbean” area as a separate unit of management and conservation, differently as has been included in the macro region “Gulf of Mexico/Mexican Caribbean”.


4.
- Artículo con arbitraje
Inferring spatial and temporal behavioral patterns of free-ranging manatees using saltwater sensors of telemetry tags
Castelblanco Martínez, Delma Nataly ; Morales Vela, José Benjamín (coaut.) ; Slone, Daniel H. (coaut.) ; Padilla Saldívar, Janneth A. (coaut.) (1971) ; Reid, James P. (coaut.) ; Hernández Arana, Héctor Abuid (coaut.) ;
Contenido en: Mammalian Biology - Zeitschrift für Säugetierkunde Vol. 80, no. 1 (January 2015), p. 21-30 ISSN: 1616-5047
Resumen en: Inglés |
Resumen en inglés

Diving or respiratory behavior in aquatic mammals can be used as indicator of physiological activity and consequently, to infer behavioral patterns. Five Antillean manatees, Trichechus manatus manatus, were captured in Chetumal Bay and tagged with GPS tracking devices. The radios were equipped with a micropower saltwater sensor (SWS), which records the times when the tag assembly was submerged. The information was analyzed to establish individual fine-scale behaviors. For each fix, we established the following variables: Distance (D), sampling interval (T), movement rate (D/T), number of dives (N), and total diving duration (TDD). We used logic criteria and simple scatterplots to distinguish between behavioral categories: ‘Travelling’ (D/T≥3 km/h), ‘Surface’ (↓TDD,↓N), ‘Bottom feeding’ (↑TDD,↑N) and ‘Bottom resting’ (↑TDD,↓N). Habitat categories were qualitatively assigned: Lagoon, Channels, Caye shore, City shore, Chanel edge, and Open areas. The instrumented individuals showed a daily rhythm of bottom activities, with surfacing activities more frequent during the night and early in the morning. More investigation into those cycles and other individual fine-scale behaviors related to their proximity to concentrations of human activity would be informative.


5.
- Artículo con arbitraje
Behavioral patterns of a manatee in semi-captivity: implications for its adaptation to the wild
Mercadillo Elguero, Maria Isabel ; Castelblanco Martínez, Delma Nataly (coaut.) ; Padilla Saldívar, Janneth A. (coaut.) (1971) ;
Contenido en: The Journal of Marine Animals and Their Ecology Vol. 7, no. 2 (December 2014), p. 31-41 ISSN: 1911-8929
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Resumen en: Inglés |
Resumen en inglés

Rehabilitation of orphaned endangered Antillean manatees (Trichechus manatus manatus) enhances in situ conservation. We investigated the behavior of a five year-old male manatee rescued in Quintana Roo (Mexico) in relation to its failed rehabilitation. This is a unique case of a semi-captive manatee in the Caribbean, and the first endeavor to release a rehabilitated orphan in Mexico. Through 134 hours of direct and ad libitum observations, we described the manatee’s behavior and assessed his behavioral time budget. The frequency of states was determined by instantaneous sampling, while the frequency of events was defined by the number of events per time unit. We designed an ethogram of 105 behaviors (56 states and 49 events), distributed in six behavioral categories. Compared with previous catalogs designed for manatees, the subject displayed 43 new behaviors (24 states and 19 events). The manatee showed indications of a daily rhythm; the animal consistently performed displacement behaviors in daytime hours, while engaged in comfort behaviors mainly at night. The use of space depended on the behavioral category and the time of day. The manatee showed dietary preference for the food provided by the caretakers, and virtually no consumption of native aquatic plants. This inadequate feeding behavior, along with a strong attachment with people, made the individual completely dependent on human care. Therefore, despite being free to explore natural areas, the animal remained close to the facilities after release. Future recommendations on the management of rescued manatees are discussed.


6.
- Artículo con arbitraje
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Resumen en: Español | Inglés |
Resumen en español

Los manatíes (Trichechus manatus manatus) son mamíferos herbívoros y de hábitos oportunistas, se alimentan de casi 60 especies de plantas. El objetivo de este trabajo fue identificar los elementos de la dieta del manatí por medio de análisis de heces en dos sitios en México (Jonuta, Tabasco y Bahía de la Ascensión, Quintana Roo) y uno en Belice (Southern Lagoon). Las muestras provienen de manatíes de vida libre y en cautiverio que fueron capturados temporalmente para muestreo y evaluación de su salud durante el período 2004-2006. Un total de 24 muestras fueron procesadas. La identificación de los elementos de la dieta se basó en el análisis microhistológico de las heces y la separación de los ítems para su posterior comparación con material bibliográfico y colecciones histológicas. También se revisaron las muestras para la búsqueda de invertebrados. Las especies vegetales identificadas fueron: Thalassia testudinum, Rhizophora mangle, Halodule wrightii, Ruppia sp. y Panicum sp., esta última confirmada por primera vez para México. No se encontró evidencia de invertebrados en las muestras. El orden de importancia relativa de consumo de las especies vegetales por los manatíes coincide con lo reportado para otras regiones de América. Se recomienda hacer un mayor esfuerzo de muestreo en áreas donde se desconocen los ítems alimentarios de la especie.

Resumen en inglés

Manatees (Trichechus manatus manatus) are herbivorous mammals with opportunistic habits that feed on approximately 60 species of plants. The focus of this paper was to identify diet elements of the manatee by fecal analysis in two sites in Mexico (Jonuta, Tabasco and Bahía de la Ascensión, Quintana Roo) and one site in Belize (Southern Lagoon). Samples were obtained from wild manatees and captive manatees temporarily captured for health assessment and sampling during 2004-2006. A total of 24 samples were analyzed. Diet components were assessed by microhistological analysis of feces. Items were separated and compared with bibliography and histological collections. Samples were also analyzed to detect invertebrates. Vegetal species found included Thalassia testudinum, Rhizophora mangle, Halodule wrightii, Ruppia sp. and Panicum sp., the latter confirmed for the first time for Mexico. No evidence of invertebrates was found in the samples. Relative importance of vegetal species consumed by manatees coincides with the findings reported for other areas in the Americas. Further systematic sampling efforts are needed in areas where manatee diet items are unknown.


7.
- Artículo con arbitraje
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Resumen en: Inglés |
Resumen en inglés

Information from 15 satellite-tracked Antillean manatees (Trichechus manatus manatus) was analyzed in order to assess individual movements, home ranges, and high-use areas for conservation decisions. Manatees were captured in Chetumal Bay, Mexico, and tagged with Argos-monitored satellite transmitters. Location of the manatees and physical characteristics were assessed to describe habitat properties. Most manatees traveled to freshwater sources. The Maximum Area Size (MAS) for each manatee was determined using the observation- area method. Additional kernel densities of 95% home range and 50% Center of Activity (COA) were also calculated, with manatees having 1–3 COAs. Manatees exhibited two different movement patterns: remaining in Chetumal Bay, and long-distance (up to 240 km in 89 d). The residence time in Chetumal Bay was higher for females (89.6% of time) than for males (72.0%), but the daily travel rate (0.4–0.5 km/d) was similar for both sexes. Most of the COAs fell within Natural Protected Areas (NPA). However, manatees also travel for long distances into unprotected areas, where they face uncontrolled boat traffic, fishing activities, and habitat loss. Conservation of movement corridors may promote long-distance movements and facilitate genetic exchange.


8.
- Artículo con arbitraje
Potential effects of human pressure and habitat fragmentation on population viability of the antillean manatee Trichechus manatus manatus: a predictive model
Castelblanco Martínez, Delma Nataly ; Nourisson Blas, Coralie (coaut.) ; Quintana Rizzo, Ester (coaut.) ; Padilla Saldívar, Janneth A. (coaut.) (1971) ; Schmitter Soto, Juan Jacobo (coaut.) ;
Clasificación: AR/599.55 / P6
Contenido en: Endangered Species Research Vol. 18, no. 2 (2012), p. 129-145 ISSN: 1863-5407
Bibliotecas: Chetumal
Cerrar
SIBE Chetumal
ECO030007679 (Disponible)
Disponibles para prestamo: 1
Resumen en: Inglés |
Resumen en inglés

We present a population viability analysis for the metapopulation of the Antillean manatee Trichechus manatus manatus with the aim of predicting its tendencies under various hypothetical scenarios of conservation. Multiple individual Monte Carlo simulations of deterministic and stochastic factors were run on VORTEX 9.73 software. Populations were defined using genetic structure, geographic barriers, and typical ranging behavior. Demographic characteristics and life history parameters were inferred from the most recent compilation of information on the subspecies or were extrapolated from the Florida manatee T. m. latirostris. The baseline model describes a metapopulation with a positive growth. This model was sensitive to changes in mortality, but did not show any significant response to variations in assumed carrying capacity, age at first reproduction, maximum reproductive age, or initial population size. We simulated different scenarios by modifying human pressure, habitat fragmentation, and catastrophic events (i.e. hurricanes). Additional combined models were developed to simulate the best- and worst-case scenarios for human pressure level and fragmentation. The model suggested that the metapopulation would not be able to withstand an annual anthropogenically induced mortality rate >5%. A decrease in the survival of transient individuals could also lead to a decline of the population. Variations of the hurricane parameters did not yield important changes in the population curves, but other effects of climatic change are discussed. The extensive geographical area used by manatees requires international collaboration to ensure the protection of the metapopulation through effective conservation strategies across countries.


Resumen en: Inglés |
Resumen en inglés

The Antillean manatee (Trichechus manatus manatus) occupies the tropical coastal waters of the Greater Antilles and Caribbean, extending from Mexico along Central and South America to Brazil. Historically, manatees were abundant in Mexico, but hunting during the pre-Columbian period, the Spanish colonization and throughout the history of Mexico, has resulted in the significantly reduced population occupying Mexico today. 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. Both populations show low genetic diversity (GMx: NA = 2.69; HE = 0.41 and ChB: NA = 3.0; HE = 0.46). The lower genetic diversity found in the GMx, the largest manatee population in Mexico, is probably due to a combination of a founder effect, as this is the northern range of the sub-species of T. m. manatus, and a bottleneck event. The greater genetic diversity observed along the Caribbean coast, which also has the smallest estimated number of individuals, is possibly due to manatees that come from the GMx and Belize. There is evidence to support limited or unidirectional gene flow between these two important areas. The analyses presented here also suggest minimal evidence of a handful of individual migrants possibly between Florida and Mexico. To address management issues we suggest considering two distinct genetic populations in Mexico, one along the Caribbean coast and one in the riverine systems connected to the GMx.


10.
- Capítulo de libro con arbitraje
*Solicítelo con su bibliotecario/a
Mamíferos marinos
Morales Vela, José Benjamín (autor) ; Padilla Saldívar, Janneth A. (autora) (1971) ; Antochiw Alonzo, Diana Madeleine (autora) ;
Contenido en: Riqueza biológica de Quintana Roo. Un análisis para su conservación Distrito Federal, México : Comisión Nacional para el Conocimiento y Uso de la Biodiversidad : El Gobierno del Estado de Quintana Roo : El Colegio de la Frontera Sur : Programa de Pequeñas Donaciones-México, 2011 Tomo 2, p. 233-240 ISSN: 978-607-7607-47-2
Bibliotecas: Campeche , Chetumal , San Cristóbal
Cerrar
SIBE Campeche
51602-30 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Chetumal
51602-20 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
51602-10 (Disponible)
Disponibles para prestamo: 1
Nota: Solicítelo con su bibliotecario/a