A5068096671- Marine animal studies overview
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Avian ecology and behavior
- Cephalopods and Marine Biology
- Coral and Marine Ecosystems Studies
- Isotope Analysis in Ecology
- Fish Biology and Ecology Studies
- Turtle Biology and Conservation
- Parasite Biology and Host Interactions
- Fish biology, ecology, and behavior
- Marine and coastal ecosystems
- Microplastics and Plastic Pollution
- Fish Ecology and Management Studies
- Parasites and Host Interactions
- Aquaculture Nutrition and Growth
- Marine and coastal plant biology
- Genetic diversity and population structure
- Pacific and Southeast Asian Studies
- Reproductive biology and impacts on aquatic species
- Mediterranean and Iberian flora and fauna
- Ocean Acidification Effects and Responses
- Higher Education and Sustainability
- Animal Virus Infections Studies
- Coastal and Marine Management
Universidad Santo Tomás
2018-2024
Universidad Santo Tomás
2016-2022
Austral University of Chile
2005-2018
University of British Columbia
2011-2013
Abstract As part of population dynamics studies the South American fur seal ( Arctophoca australis gracilis ) rookery at Punta Weather in Guafo Island (43°36'S, 74°43’W), causes and extent pup mortality were monitored. During four breeding seasons, daily counts live dead pups carried out to determine production mortality. Dead retrieved from perform necropsies. The mean was 1,735.5 ± 336 up 12 wk old 6.0%± 2.6%. major death enteritis with microscopic lesions bacteremia (28.4%), starvation...
Abstract Analysing a 529 bp segment of the mitochondrial control region, we evaluated role that Pleistocene glaciations may have had in shaping genetic structure currently found two southernmost breeding areas South American fur seal, Arctocephalus australis. Additionally, analysed if these correspond to different conservation units. We 26 haplotypes 54 individuals. Colonies from Uruguayan area did not show significant differences haplotype frequencies, which suggest they are remnants single...
The South American sea lion (Otaria flavescens) is widely distributed along the southern Atlantic and Pacific coasts of America with a history significant commercial exploitation. We aimed to evaluate population genetic structure evolutionary its distribution by analyses mitochondrial DNA (mtDNA) 10 nuclear microsatellites loci. analyzed 147 sequences mtDNA control region genotyped 111 individuals for microsatellite loci, representing six populations (Peru, Northern Chile, Southern Uruguay...
AbstractPinnipeds face increasing challenges that affect how maternal foraging and nursing strategies transfer key resources for immune function ultimately the survival of their offspring. We evaluated care in South American fur seals (Arctocephalus australis) male female pup growth, physiology, health. used capture recapture data mothers pups daily monitoring during austral summers 2015-2016, 2021-2022, 2022-2023 to assess care. collected morphometric data, blood, vibrissae growth rates,...
The robalo Eleginops maclovinus (Valenciennes 1830) is a common fsh in the littoral, estuaries and rivers (under tidal effects zone) of southern South America, including Falkland islands. feeding habits this species known mainly two frst mentioned habitats, where it consumes mostly animals from marine estuarine origin. However, little about its seasonal limnetic environments. It only assumed that has to eat preys freshwater In present study, 127 specimens E. were analysed, 119 which had...
Increases in ocean temperature are associated with changes the distribution of fish stocks, and foraging regimes maternal attendance patterns marine mammals. However, it is not well understood how these affect offspring health survival. The immunity South American fur seals were assessed a rookery where hookworm disease main cause pup mortality. Pups receiving higher levels had positive energy balance more reactive immune system. These pups able to expel hookworms through specific mediated...
A lo largo del litoral sudamericano se registran ejemplares lobo fino austral (Arctocephalus australis), especie que al establecerse en una amplia área de distribución, presentaría marcada sincronización reproductiva y un fuerte efecto latitudinal sobre sus patrones reproductivos.En este trabajo revisarán los reproductivos A. australis Isla Guafo (43º33º S, 74º51' O, Chile), determinando existencia estabilidad temporal partos, cópulas la estacionalidad territorios durante dos temporadas...
The establishment of clinical pathology baseline data is critical to evaluate temporal and spatial changes in marine mammal groups. Despite increased availability studies on hematology biochemistry mammals, reference ranges are lacking for many populations, especially among fur seal species. During the austral summers 2014 2015, we evaluated basic hematologic biochemical parameters clinically healthy, physically restrained South American ( Arctocephalus australis ) lactating females 2-mo-old...
Abstract South American fur seals, Arctocephalus australis , were intensively hunted for centuries, leaving the species at edge of extinction. After cessation commercial hunting in 20th century overall population has increased to an estimated 250 000–300 000 individuals, with Guafo Island being largest breeding colony Southern Chile colony. The genetic diversity seal on and possible connectivity among populations from Atlantic Pacific oceans studied order assess importance management...
Resumen.-El lobo fino Sudamericano (SAFS) se distribuye desde Perú hasta Uruguay.Sin embargo, existe un área de 2,300 km a lo largo la costa Chile donde no registran ejemplares SAFS.A partir comparaciones morfológicas ha identificado presencia 3 formas geográficas (Peruana, Chilena austral y Atlántica), vez que estudios moleculares preliminares sugieren tipos genéticos distintivos Atlántico).Sin ambas aproximaciones apoyan existencia 2 historias evolutivas independientes para los SAFS en...
El desfase latitudinal de los eventos reproductivos en Otaria flavescens sugiere la existencia una adaptación fisiológica y conductual a condiciones ambientales locales.La identificación cambios patrones conductuales intraespecíficos frente modificaciones sugieren relación entre estos.Se pretende revisar del O. flavescens, determinando sincronización estabilidad ellos durante las temporadas 1996-1997 1997-1998 colonia Punta Lobería, Chile.Se realizaron observaciones directas agrupaciones...
The strategies that parasites use to exploit their hosts can lead adverse effects on human and animal populations. Here, we describe the life cycle, epidemiology, consequences of hookworm (Uncinaria sp.) disease in South American fur seals (Arctocephalus australis), propose adaptation seal history traits has led maximizing transmission at high levels parasite-induced anemia mortality. Fur pups acquire hookworms during first days through mothers' colostrum most adult are expelled from pups'...
The chiloense marine ecoregion, at the Northern Chilean Patagonia, has been considered a hotspot of mammal diversity, yet little is known regarding specific sites used by these species for reproduction, nursing, refuge, and foraging. This information critical proper spatial ecosystem planning conservation resources. In austral summers 2004 through 2008, from 2012 to 2017, presence, distribution, behavior 13 mammals was recorded Guafo Island, an oceanic island located in center ecoregion....