Spacing Behavior of Marine Otters (<i>Lontra felina</i>) in Relation to Land Refuges and Fishery Waste in Central Chile

Medina-Vogel, Gonzalo; Boher, Francisca; Flores, Gabriela; Santibañez, Alexis; Soto‐Azat, Claudio

doi:10.1644/06-mamm-a081r1.1

Cited by 35 publications

(68 citation statements)

References 29 publications

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“…En términos generales, las principales amenazas para la conservación del chungungo en su condición sinantrópica tienen relación con la mortalidad accidental de nutrias en actividades de pesca (i.e.., nutrias atrapadas en redes); persecución, estrés fisiológico y contacto zoonótico con animales domésticos y/o callejeros (i.e., perros y gatos); ingesta accidental de veneno y otros compuestos dañinos; así como también el acelerado proceso de urbanización y consecuente homogenización del paisaje costero (Medina-Vogel et al 2007, PizarroNeyra 2008, Biffi & Iannacone 2010, Mangel et al 2011, Valqui 2012). …”

Section: Resultados Y Discusiónunclassified

“…Así también, la posibilidad de utilizar a esta nutria marina como especie carismática para las iniciativas sociales encausadas a establecer mejores prácticas del ser humano para con el entorno costero y sus servicios ambientales (Valqui 2012), en donde el manejo de residuos sólidos y la tenencia responsable de mascotas destacan como las acciones socioculturales con mayor urgencia de resolver dentro del espacio litoral (Medina-Vogel et al 2007, Thiel et al 2010.…”

Section: Resultados Y Discusiónunclassified

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Sinantropía y conservación marina: el caso del chungungo Lontra felina en el sur de Chile

Cursach¹,

Rau²,

Ther³

et al. 2012

Rev. biol. mar. oceanogr.

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Sinantropía y conservación marina: el caso del chungungo Lontra felina en el sur de ChileAbstract.-We describe the synanthropic behavior of Lontra felina along its geographic distribution. The marine otter used fishing ports infrastructure for shelter and food. It forages on the remains of fish discarded by fishermen. Identified threats to the conservation of this species in synanthropy include incidental mortality in fisheries and persecution by domestic animals. The opportunities are creating niche food and shelter, which favor the permanence and population growth. Finally, we identify the important variables to consider in future studies on synanthropy of this marine mammal in the socioecological systems.

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Section: Resultados Y Discusiónunclassified

Sinantropía y conservación marina: el caso del chungungo Lontra felina en el sur de Chile

Cursach¹,

Rau²,

Ther³

et al. 2012

Rev. biol. mar. oceanogr.

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“…This information is essential for the development of an effective conservation plan for this species (Medina-Vogel et al, 2007). Marine otters are difficult to study by direct observation, however.…”

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“…Males and females exhibit no sexual dimorphism, and both spend up to 80% of each day on dry land-much of that time resting in their dens. Radiotelemetry has recently been used to study marine otter spatial ecology and habitat use in Chile (Medina-Vogel et al, 2007). Here, we report on methods used for these studies, including the use of a radiotransmitter designed specifically for marine otters.…”

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confidence: 99%

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Surgical Implantation of Intra-abdominal Radiotransmitters in Marine Otters (Lontra felina) in Central Chile

Soto‐Azat

Boher

Fabry³

et al. 2008

Journal of Wildlife Diseases

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ABSTRACT:Six free-ranging marine otters (Lontra felina) were livetrapped on the central coast of Chile and implanted with specially designed radiotransmitters as part of a spatial ecology study. Marine otters frequent the rocky seashore, often squeezing their narrow bodies through cracks and crevices and grooming themselves on the rocks. They are also among the smallest of the otter species, weighing between 3.4 kg and 4.5 kg. For these reasons, the transmitter used was small, rectangular, and flat, measuring 3.533.231.0 cm. They were implanted using a ventral midline approach to minimize contact between the skin incision and sharp-edged rocks. Surgical incisions healed within 2 wk. The transmitters functioned well, but the duration varied from 62 days to 143 days instead of the 240 days predicted by the manufacturer. All six marine otters reestablished in their home ranges, and survey results suggest they survived well beyond the life of the transmitters.

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Otter occupancy in the Cape Peninsula: Estimating the probability of river habitat use by Cape clawless otters, Aonyx capensis, across a gradient of human influence

Okes

O’Riain

2017

Aquatic Conservation

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1. The distribution of Cape clawless otters, Aonyx capensis, in South Africa and their habitat requirements in freshwater and marine systems has been well established. There is, however, a lack of information on how otters are adapting to urban development and the transformation of critical freshwater habitat.2. Within the Western Cape, the Cape Peninsula exhibits substantial variation in levels of human impact over a small geographic range, offering an excellent opportunity to explore the hypothesis that otters are adversely affected by habitat transformation.3. A single season occupancy model was used based on otter sign to determine the probability of otter occupancy across a gradient of habitat transformation at both landscape and local scales.4. The probability of otters occupying river habitat in the Cape Peninsula was low (P = 0.29) but increased with proximity to marine protected areas (MPAs) that included estuaries and wetland habitat. Otter presence was not influenced by proximity to urban areas at the landscape scale, but declined in canalized sections of river that were heavily degraded by human activity. 5. Despite being heavily transformed, lowland aquatic ecosystems may still provide critical resources in the form of fresh water and breeding sites, and together with food within the marine habitat may be sustaining the peninsula's otter population.6. In order for otters to persist on the peninsula, conservation authorities must maintain wetland, estuarine and river habitat in close proximity to MPAs. Further research is needed to determine the long-term impacts on otters persisting in degraded ecosystems. 7. Annual single season occupancy surveys provide a rapid, cost-effective method for monitoring changes in otter occupancy which should be incorporated into current monitoring efforts to provide much needed long-term monitoring of a top predator in freshwater ecosystems.

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Spacing Behavior of Marine Otters (Lontra felina) in Relation to Land Refuges and Fishery Waste in Central Chile

Cited by 35 publications

References 29 publications

Sinantropía y conservación marina: el caso del chungungo Lontra felina en el sur de Chile

Sinantropía y conservación marina: el caso del chungungo Lontra felina en el sur de Chile

Surgical Implantation of Intra-abdominal Radiotransmitters in Marine Otters (Lontra felina) in Central Chile

Otter occupancy in the Cape Peninsula: Estimating the probability of river habitat use by Cape clawless otters, Aonyx capensis, across a gradient of human influence

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