Results 31 to 40 of about 115,501 (201)

Harbor porpoise losing its edge: Genetic time series suggests a rapid population decline in Iberian waters over the last 30 years. [PDF]

Ecol Evol, 2023
The Iberian harbor porpoises form a small and semi‐isolated population belonging to a distinctive ecotype adapted to the upwelling system in the southern European Atlantic waters. Here, we analyzed the mitochondrial genetic variation for a sampling spanning over the past 30 years and reported a dramatic decline in diversity.
Ben Chehida Y, Stelwagen T, Hoekendijk JPA, Ferreira M, Eira C, Torres-Pereira A, Nicolau L, Thumloup J, Fontaine MC.   +8 more
europepmc   +2 more sources

Recomendaciones metodológicas para los censos de lobos marinos comunes, Otaria flavescens

Ecología Austral, 2021
Estimar y monitorear las tendencias poblacionales es esencial para comprender el proceso de recuperación y la dinámica poblacional de especies que se han visto afectadas por acción del hombre o que necesitan ser manejadas.
M. Florencia Grandi, Néstor A. García, Enrique A. Crespo   +2 more
doaj   +1 more source

Shearing Tooth Morphology May Allow Sharks to Access Higher Trophic Levels at Smaller Sizes. [PDF]

Ecol Evol
Predator morphology imposes limitations on prey selection due to biomechanical constraints, making some prey functionally inaccessible and thereby constraining predator trophic niches. We assessed how two key components of trophic morphology—tooth shape and body size—affect prey selectivity and trophic niche in two sympatric sharks with contrasting ...
Riverón S, Raoult V, Slip DJ, Mas F, Laporta M, Pereyra I, Silveira S, Harcourt RG.   +7 more
europepmc   +2 more sources

Lobomycosis-like disease epidemiology, pathology and social affiliations in bottlenose dolphins from Southwestern Gulf of Mexico

Frontiers in Marine Science, 2022
Mycotic diseases are considered a worldwide growing concern related to public health. Lobomycosis like disease (LLD) (Lacazia loboi) is a chronic and progressive infection in skin of humans and small cetaceans present in both sides of the Americas ...
Casandra Gálvez, Mónica Tenorio-Osorio, Mónica Tenorio-Osorio, Isabel Hernández-Candelario, Christian Alejandro Delfín-Alfonso, Christian Alejandro Delfín-Alfonso, Eduardo Morteo   +6 more
doaj   +1 more source

Áreas en riesgo para los mamíferos marinos en Colombia

Revista de Biología Tropical, 2022
Introducción: Los mamíferos marinos están siendo afectados por diferentes amenazas que causan un efecto negativo a las especies o poblaciones. Para mitigar estos impactos se requiere establecer para cada especie la variación espacial y temporal de estas ...
Isabel Cristina Avila, Alan Giraldo
semanticscholar   +1 more source

Opportunistic gillnet depredation by common bottlenose dolphins in the southwestern Gulf of Mexico: Testing the relationship with ecological, trophic, and nutritional characteristics of their prey

Frontiers in Marine Science, 2022
Competition between fisheries and bottlenose dolphins is a globally relevant conflict given its socioeconomic and ecological implications. Understanding the factors driving the interactions between dolphins and fishery activities is key to the ...
Karina Chávez-Martínez, Karina Chávez-Martínez, Eduardo Morteo, Eduardo Morteo, Isabel Hernández-Candelario, Isabel Hernández-Candelario, Sharon Z. Herzka, Chrstian A. Delfín-Alfonso, Chrstian A. Delfín-Alfonso   +8 more
doaj   +1 more source

Decreases in encounter rate of endangered Northeast Pacific humpback whales in Southern Costa Rica: Possible changes in migration pattern due to warming events

Frontiers in Marine Science, 2022
Warming events in the Pacific Ocean are becoming more frequent, intense, and on a larger temporal and spatial scale. This has caused critical habitats of marine species to lose their quality and marine organisms respond by modifying their critical ...
Lili Pelayo-González, Lili Pelayo-González, David Herra-Miranda, Juan Diego Pacheco-Polanco, Héctor M. Guzmán, Sierra Goodman, Lenin Oviedo   +6 more
doaj   +1 more source

Efectos ecotoxicológicos de metales pesados sobre mamíferos marinos: Revisión sistemática

Campus
Joyce Alessandra Malca-Valdez, Rodrigo Alonso Villano-Vilchez, Isabel Gonzalez-Caro, Sandra Campos-Rodríguez, Daniela Cristina Vilchez-Aguilar, Joaquin Alfonso Garreta-Diez, J. Iannacone   +6 more
semanticscholar   +2 more sources

Vertebral Morphology in Partially Sympatric Dolphins: A 3D Approach

Frontiers in Marine Science, 2020
In cetaceans, increased body flexibility is associated with increased maneuverability, this affects the animal’s swimming speed and foraging behavior. A more stable body form is associated with fast swimming and wide turns.
Maria C. Marchesi, Matías S. Mora, Silvana L. Dans, Mariano A. Coscarella, Rolando González-José   +4 more
doaj   +1 more source

Diversidad de aves y mamíferos marinos en bahía San Pedro, costa de Purranque, centro-sur de Chile Diversity of seabirds and marine mammals in bahía San Pedro, Purranque coast, south-central Chile

Gayana, 2011
Entre los años 2007 y 2009, se estudió la diversidad de aves y mamíferos marinos que habitan bahía San Pedro (comuna de Purranque, provincia de Osorno).
Jaime A Cursach, Jaime R Rau, Jaime Ojeda, Jonathan Vilugrón, Claudio Tobar, Carlos Oyarzún, Oscar Soto, Cristián G Suazo   +7 more
doaj   +1 more source