scholarly journals Variation in Neotropical river otter (Lontra longicaudis) diet: Effects of an invasive prey species

PLoS ONE ◽  
2019 ◽  
Vol 14 (10) ◽  
pp. e0217727
Author(s):  
Diego Juarez-Sanchez ◽  
John G. Blake ◽  
Eric C. Hellgren
Keyword(s):  
Prey Species ◽  
River Otter ◽  
Invasive Prey ◽  
Lontra Longicaudis

scholarly journals Variation in neotropical river otter (Lontra longicaudis) diet: Effects of an invasive prey species

2019 ◽  
Author(s):  
Diego Juarez Sanchez ◽  
John G. Blake ◽  
Eric C. Hellgren
Keyword(s):  
Trophic Level ◽  
Niche Breadth ◽  
River Otter ◽  
Fecal Matter ◽  
First Report ◽  
Fish Samples ◽  
Dietary Niche ◽  
Invasive Prey ◽  
Three Rivers ◽  
Lontra Longicaudis

AbstractDue to human activities, some species have expanded their distribution into areas that were historically difficult or impossible to reach by natural dispersal. Such species may become invasive if they successfully establish reproductive populations. Predation is one of the main barriers that exotic species may face in newly colonized areas. We evaluated the effect of an invasive prey (armored catfish:Pterygoplichtyssp.) on the dietary niche breadth and trophic level of a native predator (Neotropical river otter:Lontra longicaudis) in northern Guatemala. We examined otter scats from three rivers: two where the invasive armored catfish occurred and one without the invasive fish. Samples were collected two and seven years after the first report of the catfish in the area. We performed gross scat analysis and stable isotope analyses of nitrogen and carbon of fecal matter. Where the invasive armored catfish occurred, it was the main prey item forL. longicaudis. Particularly in the river outside of protected areas seven years after the first report of the catfish, where it accounted for 49% of the otter diet. Concordance was found between the two techniques to estimate dietary niche breadth and trophic level. The dietary niche breath of otters was narrower seven years after the invasion in comparison to two years after the invasion in both invaded rivers, but, the extent of the reduction was less inside the protected area. Finally, the trophic level of otters also showed a reduction related to the occurrence of the armored catfish on their diet.ResumenComo producto de las actividades humanas algunas especies han expandido su distribución hacia áreas que históricamente eran difícil o imposible de alcanzar mediante de dispersión natural. Estas especies pueden convertirse en invasoras si establecen exitosamente poblaciones reproductivas. La depredación es una de las principales barreras que las especies exóticas deben afrontar en las áreas recientemente colonizadas. Evaluamos los efectos de una especie invasora (el pez diablo:Pterygoplichtyssp.) sobre la amplitud de nicho alimenticio y el nivel trófico de un depredador nativo (la nutria de rio Neo-tropical:Lontra longicaudis) en el norte de Guatemala. Examinamos las excretas de nutrias provenientes de tres ríos: dos donde el pez diablo se encuentra presente y uno donde este invasor aún está ausente. Las muestras fueron colectadas dos y siete años después del primer reporte de del pez diablo en le área. Realizamos un análisis macroscópico de las excretas y análisis de isotopos estables de nitrógeno y carbono de la materia fecal. Donde el pez diablo invasor estaba presente, fue el principal ítem alimenticio deL. longicaudis. Particularmente en el río ubicado fuera de áreas protegidas siete años después del primer reporte del pez diablo, donde este consistió en el 49% de la dieta de la nutria. Encontramos concordancia entre las dos técnicas para estimar la amplitud de nicho dietario y nivel trófico. La amplitud de nicho dietario de las nutrias fue más angosto siete años después de la invasión en comparación con dos años luego de la invasión en ambos ríos invadidos, pero la magnitud de la reducción fue inferior dentro del área protegida. Finalmente, observamos una reducción en el nivel trófico de las nutrias relacionada con la ocurrencia del pez diablo en su dieta.

Frequent Consumption and Rapid Digestion of Prey by the Lake Erie Watersnake with Implications for an Invasive Prey Species

Copeia ◽  
2009 ◽  
Vol 2009 (3) ◽  
pp. 437-445 ◽  
Author(s):  
Peter C. Jones ◽  
Richard B. King ◽  
Kristin M. Stanford ◽  
Tyler D. Lawson ◽  
Matt Thomas
Keyword(s):  
Lake Erie ◽  
Prey Species ◽  
Frequent Consumption ◽  
Invasive Prey

Something different for dinner? Responses of a native Australian predator (the keelback snake) to an invasive prey species (the cane toad)

2009 ◽  
Vol 12 (5) ◽  
pp. 1045-1051 ◽  
Author(s):  
John Llewelyn ◽  
Lin Schwarzkopf ◽  
Ross Alford ◽  
Richard Shine
Keyword(s):  
Prey Species ◽  
Cane Toad ◽  
Invasive Prey

scholarly journals REGISTROS DEL GRISÓN (Galictis vittata), NUTRIA DE RÍO NEOTROPICAL (Lontra longicaudis) Y CONEJO (Sylvilagus sp) EN LA RESERVA DE LA BIOSFERA LA ENCRUCIJADA, CHIAPAS, MÉXICO

2018 ◽  
Vol 1 (1) ◽  
pp. 8
Author(s):  
Julio C. Hernández-Hernández ◽  
Fernando Ruiz-Gutiérrez ◽  
Enrique Vázquez-Arroyo ◽  
Cuauhtémoc Chávez
Keyword(s):  
Coastal Wetland ◽  
Biosphere Reserve ◽  
The State ◽  
Camera Traps ◽  
Camera Trapping ◽  
River Otter ◽  
Natural Area ◽  
Protected Natural Area ◽  
Wetland System ◽  
Lontra Longicaudis

ResumenSe confirma mediante fototrampeo la presencia de grisón (Galictis vittata), nutria de río neotropical (Lontra longicaudis) y conejo (Sylvilagus sp) en la Reserva de la Biosfera La Encrucijada (REBIEN), en el estado de Chiapas, México. La presencia de estas especies refleja la importancia de la REBIEN, considerada como la única área natural protegida en el estado de Chiapas que protege las especies de flora y fauna del sistema de humedales costeros, reafirmando la necesidad de continuar realizando inventarios biológicos en México.Palabras clave: cámaras trampa, carnivora, Chiapas, distribución, lagomorpha, La Encrucijada.AbstractThe presence of greater grison (Galictis vittata), neotropical river otter (Lontra longicaudis) and cottontail (Sylvilagus sp) in La Encrucijada Biosphere Reserve (ENBIRE), in the state of Chiapas, Mexico, is confirmed by camera trapping. The presence of these records reflects the importance of the ENBIRE, considered the only protected natural area in the Chiapas state that protects the species of flora and fauna of the coastal wetland system, reaffirming the need to continue conducting biological inventories in Mexico.Key words: camera-traps, carnivora, Chiapas, distribution, lagomorpha, La Encrucijada.

scholarly journals Habitat mediates coevolved but not novel species interactions

2022 ◽  
Vol 289 (1966) ◽  
Author(s):  
Joshua P. Twining ◽  
Chris Sutherland ◽  
Neil Reid ◽  
David G. Tosh
Keyword(s):  
Species Interactions ◽  
Prey Species ◽  
Positive Influence ◽  
Habitat Modification ◽  
Red Squirrel ◽  
Pine Marten ◽  
Grey Squirrel ◽  
Landscape Modification ◽  
Anthropogenic Habitat ◽  
Invasive Prey

Ongoing recovery of native predators has the potential to alter species interactions, with community and ecosystem wide implications. We estimated the co-occurrence of three species of conservation and management interest from a multi-species citizen science camera trap survey. We demonstrate fundamental differences in novel and coevolved predator–prey interactions that are mediated by habitat. Specifically, we demonstrate that anthropogenic habitat modification had no influence on the expansion of the recovering native pine marten in Ireland, nor does it affect the predator's suppressive influence on an invasive prey species, the grey squirrel. By contrast, the direction of the interaction between the pine marten and a native prey species, the red squirrel, is dependent on habitat. Pine martens had a positive influence on red squirrel occurrence at a landscape scale, especially in native broadleaf woodlands. However, in areas dominated by non-native conifer plantations, the pine marten reduced red squirrel occurrence. These findings suggest that following the recovery of a native predator, the benefits of competitive release are spatially structured and habitat-specific. The potential for past and future landscape modification to alter established interactions between predators and prey has global implications in the context of the ongoing recovery of predator populations in human-modified landscapes.

Can an Invasive Prey Species Induce Morphological and Behavioral Changes in an Endemic Predator?Evidence from a South Korean Snake(Oocatochus rufodorsatus)

2014 ◽  
Vol 5 (4) ◽  
pp. 245
Author(s):  
HEO Jun-Haeng ◽  
LEE Heon-Joo ◽  
KIM Il-Hun ◽  
J.FONG Jonathan ◽  
KIM Ja-Kyeong ◽  
...  
Keyword(s):  
Prey Species ◽  
Behavioral Changes ◽  
South Korean ◽  
Invasive Prey

scholarly journals Limpkin, Aramus guarauna (L., 1766) (Gruiformes, Aramidae), extralimital breeding in Louisiana is associated with availability of the invasive Giant Apple Snail, Pomacea maculata Perry, 1810 (Caenogastropoda, Ampullariidae)

Check List ◽  
2019 ◽  
Vol 15 (3) ◽  
pp. 497-507
Author(s):  
Robert C. Dobbs ◽  
Jacoby Carter ◽  
Jessica L. Schulz
Keyword(s):  
Range Expansion ◽  
Prey Species ◽  
Apple Snail ◽  
Predator Species ◽  
Pomacea Maculata ◽  
Invasive Prey ◽  
Conservation And Management ◽  
Native Predator

We document the first breeding record of Limpkin, Aramus guarauna (Linnaeus, 1766) (Gruiformes, Aramidae), for Louisiana, describe an additional unpublished breeding record from Georgia, as well as a possible record from Alabama, and associate these patterns with the concurrent establishment of the invasive Giant Apple Snail, Pomacea maculata Perry, 1810 (Caenogastropoda, Ampullariidae). We predict that an invasive prey species may facilitate range expansion by native predator species, which has ramifications for conservation and management.

scholarly journals Treetop shelter of a neotropical river otter cub (Lontra longicaudis - Carnivora: Mustelidae) in an Amazonian flooded forest

2007 ◽  
Vol 37 (2) ◽  
pp. 309-312
Author(s):  
Pedro Manuel Ribeiro Simões dos Santos ◽  
Valdely Ferreira Kinupp ◽  
Alexandre Coletto-Silva
Keyword(s):  
Strong Relationship ◽  
High Water ◽  
Breeding Cycle ◽  
River Otter ◽  
Advantages And Disadvantages ◽  
Flooded Forest ◽  
Central Amazonia ◽  
Seasonally Flooded ◽  
Made In ◽  
Lontra Longicaudis

The finding of a Neotropical river otter (Lontra longicaudis) cub occupying a shelter in a hollowed treetop is reported. The observation was made in a seasonally flooded forest in Central Amazonia, during the high water peak of the annual inundation cycle. A literature review indicates that this is the first description of a shelter of the species, both in a hollowed tree and in Amazonia. This observation can indicate a strong relationship between the species' breeding cycle with the annual dynamics of Amazonian rivers. We discuss potential advantages and disadvantages of breeding when water level is high.

Sign in / Sign up

Export Citation Format

Share Document