A5001841897- Marine animal studies overview
- Cephalopods and Marine Biology
- Isotope Analysis in Ecology
- Wildlife Ecology and Conservation
- Marine and fisheries research
- Ichthyology and Marine Biology
- Animal Vocal Communication and Behavior
- Identification and Quantification in Food
- Bat Biology and Ecology Studies
- Parasite Biology and Host Interactions
- Marine Bivalve and Aquaculture Studies
- Genetic diversity and population structure
- Avian ecology and behavior
- Fish biology, ecology, and behavior
- Marine and coastal ecosystems
- Fish Ecology and Management Studies
- Parasitic infections in humans and animals
- Marine and coastal plant biology
- Meat and Animal Product Quality
- Ecology and biodiversity studies
- Geographies of human-animal interactions
- Geology and Paleoclimatology Research
- Toxoplasma gondii Research Studies
- Marine Biology and Ecology Research
- Coral and Marine Ecosystems Studies
Centro Científico Tecnológico Patagónico
2012-2025
National University of Patagonia San Juan Bosco
2011-2025
Consejo Nacional de Investigaciones Científicas y Técnicas
2015-2023
Universidade Federal do Rio Grande
2015
Universidade do Vale do Rio dos Sinos
2011
Pontifícia Universidade Católica do Rio Grande do Sul
2011
Universidad Peruana Cayetano Heredia
2011
The processes involved in the carbon cycle are essential for marine trophic networks and global climate regulation. Interactions within microbial loop play key roles transformation transport across food web. Argentine Patagonian Shelf Southwestern Atlantic Ocean is a hotspot sequestration. However, our understanding of impacts on cycling this area remains limited. This study examines community structure its role during progression spring bloom along shelf-break adjacent ocean. was studied...
ABSTRACT Estimates of apparent survival and abundance are crucial for understanding the population dynamics sentinel species. To achieve this, it is necessary to establish a baseline these parameters effective management planning in areas strongly impacted. This case dusky dolphin ( Lagenorhynchus obscurus ), species inhabiting Argentine coasts. In Golfo Nuevo, information on demographic this species, which coexists with tourism activities, remains insufficient. study, dolphins Patagonia,...
Although policymakers and stakeholders are beginning to acknowledge the importance of marine biosphere in blue carbon services, role large vertebrates nitrogen cycle especially sequestration has not yet been fully understood. Large store only a small percentage total oceanic their bodies, but they can provide important lasting contributions flux. The Península Valdés Biosphere Reserve southwestern Argentina was partially established conserve these vertebrates, including South American sea...
The taxonomy of common dolphins (Delphinus sp.) has always been controversial, with over twenty described species since the original description type genus delphis Linnaeus, 1758). Two and four subspecies are currently accepted, but recent molecular data have challenged this view. In study we investigated through analyses cytochrome b sequences 297 individuals from most their distribution. We included 37 novel Southwestern Atlantic Ocean, a region where short- long-beaked morphotypes occur...
Abstract Blooms of phototrophic protists play a crucial role in marine biogeochemical cycles, significantly impacting carbon fluxes and overall ecosystem productivity. Eukaryotes the nano‐ microplankton are responsible for large spring summer blooms visible from space highly dynamic southwestern Atlantic Ocean. Here, we investigated composition abundance protistan plankton during late 2021 across three contrasting oceanographic regions Ocean: Patagonian continental shelf, core Malvinas...
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...
Abstract The dusky dolphin Lagenorhynchus obscurus occurs in the Southern Hemisphere, where it is restricted to coastal temperate areas. This study aimed characterize feeding ecology of dolphins inhabiting northern and central Patagonia by using δ 13 C 15 N stable isotope ratios skin samples. We searched for evidence geographical seasonal variation diet we explored dietary differences between sexes. Significant were found among 4 gulfs under study. Skin samples from Golfo San Matías Jorge...
ABSTRACT Most aquatic mammals have high dispersal potential, and there are often severe conservation concerns related to their legal or illegal harvesting. Therefore, economic, social forensic factors arise in decisions relating population management. Molecular markers essential tools modern genetics, revealing previously unknown aspects of mammal behaviour, natural history, structure demography. also been used define management units, recognize taxonomic conduct analyses control wildlife...
Natural or human-induced environmental changes can modify the structure of ecological communities and thus alter food web interactions. After collapse hake stocks (Merluccius hubbsi) provoked by fisheries over Patagonian shelf in 1997 profound have taken place community, including long-term dietary shifts some marine vertebrate predators. Stable carbon (δ13C) nitrogen (δ15N) isotope ratios bone collagen subadult adult male South American fur seals (Arctocephalus australis) were measured for...
Abstract The dusky dolphin ( Lagenorhynchus obscurus ) represents one of the most abundant species small cetacean in Argentine waters. During 1980s and 1990s, high levels incidental mortality purse trawl fisheries were documented, recent decades tourism activities have been added as a potential source disturbance. study objectives to identify spatial genetic structure regional patterns dolphins along coast. variation 413bp control region 119 individuals over six locations spread 2800 km...
Abstract Killer whales ( Orcinus orca ) are highly mobile, large marine apex predators that inhabit all oceans. Despite being the most conspicuous top predator, little is known about their ecology along Patagonia, Argentina. Here, we used carbon (δ 13 C) and nitrogen 15 N) isotope analysis of bone dentine collagen from killer n = 13) stranded in northern Patagonia during period 1970–2014 to assess trophic ecology. A model‐based clustering identified three distinct groups related with...
Commerson's dolphins, Cephalorhynchus commersonii, suffer bycatch in fisheries and are target of dolphin-watching activities along Patagonia. Here we described dolphins' habitat use behavioural pattern at the estuary Santa Cruz River. Behavioural observations were made from vantage points using a spotting scope. Boat surveys conducted randomly Puerto to mouth river analyze use. The survey area was divided into 1 km 2 cells characterized with depth benthic slope. behaviours for dolphin were:...
Interactions between killer whales and sea lions are widely known. This work describes the predator-prey behaviour of South American lion associated with a trawling fishery. In Argentina predatory behaviours anti-predatory have been described from costal based observations, but these species is poorly known at open waters. Here we describe whale group attack on an individual lion, using video recorded vessel interview ship captain. represents example complexity interactions marine mammals...
Commerson’s dolphin Cephalorhynchus commersonii and Peale’s Lagenorhynchus australis live in sympatry along the southwestern South Atlantic Ocean, suggesting existence of some degree habitat partitioning to reduce their competition for resources. Both species are usually associated with coastal environments, but information on trophic ecology is scarce. Here we explored resource between these 2 sympatric using δ 13 C 15 N. From 2007 2013, analyzed a total 14 34 skin samples from marine...
Abstract A key in species conservation is understanding the amount and distribution of genetic diversity how environmental changes that occurred recent past may have influenced current patterns population structure. Commerson’s dolphin, Cephalorhynchus commersonii , has two subspecies, one which endemic to South America ( C. ) little known about its genetics. Our objective was investigate genetics this subspecies throughout distribution. Using 70 skin samples information available GenBank,...
Ecological information useful for conservation purposes have benefitted from recent and rapid advancements in genetic techniques, revealing unknown aspects of behavior, natural history, population structure demography several aquatic mammal species, many them with concerns. Molecular markers been used to define management units, settle taxonomic uncertainties, control illegal wildlife trade, among others, providing valuable decision-making conserve manage mammals. We review studies applied...
Abstract In recent years, analysis of tissue samples has become a powerful tool in cetacean ecology since it provides information for effective conservation and management policies. Biopsy taken such studies have been obtained by various means including crossbows, rifles, pole systems. We investigated sampling success the reaction dusky dolphins (Lagenorhynchus obscurus) off coast Argentina to biopsy system from 2008 2009. Using ad libitum behavioural sampling, we documented individual...
Successful conservation strategies require an accurate estimation of population size and this parameter is one the most important factors that determine rate various evolutionary processes. In study we integrated information from genetic, photo-identification aerial surveys dusky dolphins to effective number inhabit gulfs Peninsula Valdés (GN GSJ) are exposed tourism vessel traffic. Photo-identification sessions biopsies samples were collected a research between 2004 2013 estimate in area by...