Article
Environmental Studies
Natalia Prockscha, Natalia Bragiola Berchieri, Rafael Kenji Horota, Vinicius Sales, Paulo Henrique Ott, Daniel Danilewicz, Taina Thomassim Guimaraes, Murilo Guimaraes, Mauricio Roberto Veronez, Larissa Rosa de Oliveira
Summary: This study analyzes the influence of relief on habitat use by South American fur seals and sea lions in Ilha dos Lobos Wildlife Refuge in southern Brazil. The researchers tested the hypothesis that the spatial occupation of the refuge by these two species is related to the higher relief in the northern region of the island. The results suggest that there is a correlation between higher relief areas and higher densities of the South American pinnipeds on the island, indicating a preference for resting in higher areas.
Article
Ecology
Maritza Sepulveda, Pablo Carrasco, Renato Quinones
Summary: The study conducted in the most important breeding colony of South American sea lions in central Chile over a twelve-year period revealed that these long-lived species are indicators of ecosystem quality, with the highest numbers observed during the breeding season and the most abundant age-class being adult females. The population size in the colony showed an increase over the study period, especially in the number of pups, highlighting the importance of developing effective long-term protection measures for the conservation of the South American sea lion in this location.
Article
Marine & Freshwater Biology
Ailin Sosa Drouville, Carolina Paschetta, Enrique Alberto Crespo, Maria Florencia Grandi
Summary: The study revealed a correlation between changes in population abundance and skull size and shape in the South American sea lion population in Patagonia over the past 100 years. The decrease in skull size in individuals postharvest may indicate a density-dependence response in somatic growth.
MARINE MAMMAL SCIENCE
(2021)
Article
Parasitology
Jesus S. Hernandez-Orts, Tetiana A. Kuzmina, Luis A. Gomez-Puerta, Roman Kuchta
Summary: This study describes a new species of Diphyllobothrium, Diphyllobothrium sprakeri n. sp., first found in California sea lions from the Pacific coast of North America. It also confirms that South American sea lions from Argentina, Chile, and Peru serve as an additional host. Additionally, it revealed the first coinfection of two diphyllobothriid species in sea lions from the Southern Hemisphere.
PARASITES & VECTORS
(2021)
Article
Marine & Freshwater Biology
Guillermo J. Sanchez Contreras, Barbara Biancani, Nicola Pussini, Claudia Gili, Livio Galosi, Giacomo Rossi
Summary: An 18-year-old captive South American sea lion presented with severe gastrointestinal symptoms and deteriorated despite treatment, leading to humane euthanasia and necropsy revealing a poorly demarcated hepatic epithelial neoplasia with metastases. Immunohistochemical examination confirmed the tumor as primary hepatic origin with unusual metastases to various organs, including the parathyroid gland. This case represents the first documented instance of hepatocellular carcinoma with metastases to the lungs and parathyroid gland in a South American sea lion.
Review
Ecology
Maritza Sepulveda, Diana Szteren, Joanna Alfaro-Shigueto, Enrique A. Crespo, Luis Rene Duran, Alicia I. Guerrero, Jeffrey C. Mangel, Doris Oliva, Larissa R. Oliveira
Summary: The main issue affecting the conservation of most pinniped species in South American waters is interactions with fisheries and aquaculture. Research and conservation measures are urgently needed to address this problem, particularly for species of conservation concern. This study reviewed research and observations from the last 25 years on pinnipeds' interactions with fisheries and aquaculture in South American waters, highlighting the limited progress in incorporating mitigation measures and the low economic losses associated with sea lion depredation.
Article
Multidisciplinary Sciences
Mohan Ram, Aradhana Sahu, Shyamal Tikadar, Harshal Jayawant, Lahar Jhala, Yashpal Zala, Meena Venkataraman
Summary: The study found that Asiatic lions living in the coastal habitats have a larger home range compared to lions in the protected area, and they extensively use forest habitat patches and habitats around water sources. This highlights the importance of corridors connecting to the protected area and coastal forest patches for lion conservation and management.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Margaret E. Martinez, Michelle Rivard, Chelsea Sykes, Jaclyn Isbell, Sarah W. Grimes, Robert Poppenga, Padraig J. Duignan
Summary: This study reports the first case series of osteofluorosis in free-ranging marine mammals, documenting baseline bone fluoride concentrations in this population. The cases exhibited osseous proliferations and increased tooth wear, with significantly higher fluoride concentrations in their bones compared to normal individuals. This is the first report of osteofluorosis in free-ranging marine mammals, highlighting the need for understanding the exact source of excessive fluoride levels in this population.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Yeonjung Lim, Seung-Jo Yang, Ilnam Kang, Jang-Cheon Cho
Summary: This article presents a monthly time-series metagenomic dataset of the microbial communities in the East Sea, which can facilitate investigations into the marine microbial ecosystems in this region. The study reveals that the East Sea exhibits different biogeochemical features under seasonal fluctuations.
Article
Engineering, Marine
Yoon-Ji Lee, Giphil Cho, Sangil Kim, Inseo Hwang, Seong-Oh Im, Hye-Min Park, Na-Yeong Kim, Myung-Joon Kim, Dasom Lee, Seok-Nam Kwak, Sang-Heon Lee
Summary: This study reconstructs the population of the Dokdo sea lion using a population model and examines the impact of human hunting pressure. The results demonstrate a rapid decline in the population within 10 years of hunting, indicating an extinction risk.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Alexey E. Kuzin, Alexey M. Trukhin
Summary: This report provides data on the entanglement of Steller sea lions in marine debris on Tyuleniy Island, Sea of Okhotsk. The report estimates the frequency of entanglement based on the material, sex, and age of the animals. The findings show that an average of 22.2 individuals per year were recorded with debris on their bodies, with young males constituting the largest proportion among them (5.2%).
MARINE POLLUTION BULLETIN
(2022)
Article
Biotechnology & Applied Microbiology
Eduardo Caballero, Agustin Flores, Araceli Olivares
Summary: The use of macroalgae in food applications as a replacement for animal proteins has been explored, requiring a thorough analysis of their nutritional characteristics, mineral content, and heavy metal concentration to ensure safety. The extraction of alginates from different species of macroalgae, particularly for calcium and sodium alginates, can enhance their applications in food products based on viscosity and stability. Among the studied species, Durvillaea Antarctica showed the highest extraction yield and technological potential, especially in generating higher viscosity.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Review
Environmental Sciences
Carolina Oyarzo-Miranda, Ricardo Otaiza, Alexis Bellorin, J. M. Alonso Vega, Fadia Tala, Nelson A. Lagos, Fernanda X. Oyarzun, Rodrigo A. Estevez, Nicolas Latorre-Padilla, Ana Maria Mora Tapia, Luis Figueroa-Fabrega, Roddy Jara-Yanez, Cristian Bulboa, Loretto Contreras-Porcia
Summary: Several seaweed species are widely commercialized globally due to their demand in food, feed, and the extraction of phycocolloids. Chile is the leading producer, but overexploitation has caused a decrease in natural stocks. Various strategies have been implemented to restore seaweed stocks, with varying success rates. However, technological improvements are needed to develop cost-effective restocking strategies that are scalable, transferable, and socio-ecologically sustainable.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Development Studies
Paula Villagra, Carolina Quintana, Silvia Ariccio, Marino Bonaiuto
Summary: This study aims to explore the psychological and spatial influences on people's intention to evacuate to designated sites in Puerto Saavedra, Chile, showing that psychological indicators vary in perception between different evacuation scenarios.
HABITAT INTERNATIONAL
(2021)
Article
Microbiology
Sergio Guajardo-Leiva, Valentin Berrios-Farias, Felipe G. Bermudez, Eduardo Castro-Nallar
Summary: Sentinel species can be used to monitor environmental disturbances. In this study, 30 temporally explicit metagenomes and 166 metagenome-assembled genomes (MAGs) from the gut of South American sea lions were analyzed to assess whether changes in gut microbiome composition and gene content could indicate environmental disturbances from salmon farming.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2023)
Article
Behavioral Sciences
M. Jose Perez-Alvarez, Rodrigo A. Vasquez, Rodrigo Moraga, Macarena Santos-Carvallo, Sebastian Kraft, Valeria Sabaj, Juan Capella, Jorge Gibbons, Yerko Vilina, Elie Poulin
Article
Fisheries
Alejandro Abarca, Doris Oliva, Pedro Toledo
JOURNAL OF THE WORLD AQUACULTURE SOCIETY
(2019)
Article
Multidisciplinary Sciences
Peter T. Fretwell, Jennifer A. Jackson, Mauricio J. Ulloa Encina, Vreni Haussermann, Maria J. Perez Alvarez, Carlos Olavarria, Carolina S. Gutstein
Article
Multidisciplinary Sciences
Sebastian Kraft, M. Jose Perez-Alvarez, Carlos Olavarria, Elie Poulin
SCIENTIFIC REPORTS
(2020)
Article
Ecology
Ricardo Sarmiento-Devia, Maritza Sepulveda, Guido Pavez, Jorge Valdes, Anahi Canto, Muriel Orellana, Doris Oliva
Article
Fisheries
Camila Barria, Alejandro Abarca, David Colivoro, Angela Celis, Pablo Couve, Daniel Carcamo, L. Rene Duran, Doris Oliva
Summary: This study optimized broodstock conditioning and successful induced spawning of Tawera elliptica, describing the developmental process from embryos to early larval stage. The results suggest that conditioning in a water circulation system for 48 days is suitable for this species.
AQUACULTURE RESEARCH
(2021)
Article
Environmental Sciences
Macarena Santos-Carvallo, Fernanda Barilari, Maria Jose Perez-Alvarez, Laura Gutierrez, Guido Pavez, Hector Araya, Cristobal Anguita, Claudia Cerda, Maritza Sepulveda
Summary: Whale-watching activity has been increasing globally, impacting the behavior patterns of cetaceans like fin whales. The study found that the presence of whale-watching boats caused fin whales to exhibit more erratic and sinuous movements, while they tended to swim in straighter trajectories when resting as the number of boats increased.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Maria Jose Perez-Alvarez, Francisca Rodriguez, Sebastian Kraft, Nicolas Segovia, Carlos Olavarria, C. Scott Baker, Debbie Steel, Naoko Funahashi, Verena Haussermann, Mauricio Ulloa, Camilo Naretto, Elie Poulin
Summary: The study revealed significant genetic differentiation among sei whale populations in the North Atlantic, North Pacific, and Southern Hemisphere, supporting the need for separate management units for conservation. Demographic analyses showed recent population size reductions in the Southern Hemisphere and North Atlantic, with most genetic diversity retained but at risk of future loss due to continued population decline.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2021)
Article
Environmental Sciences
MJose Perez-Alvarez, Sebastian Kraft, Nicolas I. Segovia, Carlos Olavarria, Sergio Nigenda-Morales, R. . Jorge Urban, Lorena Viloria-Gomora, Frederick Archer, Rodrigo Moraga, Maritza Sepulveda, Macarena Santos-Carvallo, Guido Moraga, Elie Poulin
Summary: Four valid sub-species of fin whales are recognized, with one yet to be genetically validated. Genetic analyses show strong phylogeographic structure across hemispheres, with limited coverage in the Southern Hemisphere's middle latitudes. Absence of gene flow between hemispheres and rare dispersal events indicate a lack of genetic structure within the Southern Hemisphere, suggesting the existence of one single taxa.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Ecology
Fernando Felix, Jeffrey C. Mangel, Joanna Alfaro-Shigueto, Luis Alberto Cocas, Jorge Guerra, Maria Jose Perez-Alvarez, Maritza Sepulveda
Summary: The Fish and Fish Products Import Provisions of the United States Marine Mammal Protection Act (MMPA) could pose significant challenges to countries like Chile, Ecuador, and Peru, which export fish products to the U.S. market. These countries need to meet regulatory standards comparable to those of the U.S. and take steps to reduce impacts on marine mammals as they may be subject to commercial restrictions under the MMPA.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Sebastian Kraft, MJose Perez-Alvarez, Carlos Olavarria, Rodrigo Moraga, C. Scott Baker, Debbie Steel, Paul Tixier, Christophe Guinet, Amelia Viricel, Paul Brickle, Marina Costa, Enrique Crespo, Cristian Durante, Rocio Loizaga, Elie Poulin
Summary: Commerson's dolphins are divided into two subspecies, with the Kerguelen Islands subspecies thought to have originated from South America. Genetic differences exist between the two subspecies, supporting the model of post-glacial colonization of the Kerguelen Islands by South American Commerson's dolphins.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Fisheries
Catalina Lizama, Alejandro Abarca, Luis Rene Duran, Doris Oliva
Summary: Artificial cultivation of clams as an alternative to natural extraction is discussed in this paper. The study explores species-specific research and the effects of culture parameters on the development of larvae. Specific methods for inducing spawning and the impact of culture densities on yield are also examined.
LATIN AMERICAN JOURNAL OF AQUATIC RESEARCH
(2022)
Review
Engineering, Marine
Camila Barria, Piera Vasquez-Calderon, Catalina Lizama, Pablo Herrera, Anahi Canto, Pablo Conejeros, Orietta Beltrami, Benjamin A. Suarez-Isla, Daniel Carrasco, Ignacio Rubilar, Leonardo Guzman, L. Rene Duran, Doris Oliva
Summary: Harmful Algal Blooms (HABs) are a global problem that has been increasing in frequency in the Southeast Pacific region of Chile. The types of HABs in Chile include toxic HABs and ichthyotoxic HABs, with a lack of knowledge about harmful algal species in the Chilean Humboldt Current system. The occurrence and impacts of HAB events in Chile have been analyzed over a 65-year period, with diatoms, dinoflagellates, and silicoflagellates being the main causative microalgae species. The frequency of HAB events appears to be associated with monitoring efforts.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Biology
Sebastian Kraft, Francisca Rodriguez, Carlos Olavarria, Elie Poulin, Maria Jose Perez-Alvarez
Summary: Cetacean strandings along the coast of Chile provide valuable information for various studies, but identifying species and sex can be challenging. Molecular tools offer a complementary method to improve stranding databases, correct misidentifications, and provide new data for unidentified samples. This study evaluated how gene fragment amplification protocols can support field records of strandings by identifying, corroborating, or correcting species and sex identification. Through collaboration between a scientific laboratory and government institution, 39 out of 63 analyzed samples were successfully identified to the species level, including species of conservation interest. This method enhances the stranding database, contributing to future management and conservation efforts.
Article
Marine & Freshwater Biology
Alejandro Abarca, Pedro Toledo, Doris Oliva
REVISTA DE BIOLOGIA MARINA Y OCEANOGRAFIA
(2018)