A5028206099- Marine animal studies overview
- Wildlife Ecology and Conservation
- Wildlife Conservation and Criminology Analyses
- Identification and Quantification in Food
- Animal Vocal Communication and Behavior
- Genetic diversity and population structure
- Seed and Plant Biochemistry
- Marine and fisheries research
- Arctic and Antarctic ice dynamics
- Plant and animal studies
- Evolution and Paleontology Studies
- Fossil Insects in Amber
- Bat Biology and Ecology Studies
- Coral and Marine Ecosystems Studies
- Orthoptera Research and Taxonomy
- Polysaccharides Composition and Applications
- Agronomic Practices and Intercropping Systems
- Animal Ecology and Behavior Studies
- Crime Patterns and Interventions
- Agroforestry and silvopastoral systems
- Edible Oils Quality and Analysis
- Rabbits: Nutrition, Reproduction, Health
- Tree Root and Stability Studies
- Botanical Research and Applications
- Plant-derived Lignans Synthesis and Bioactivity
Centro Científico Tecnológico - Patagonia Norte
2011-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2012
National University of Tucumán
2012
National University of Río Negro
2012
Fundación Miguel Lillo
2012
Wildlife Conservation Society Argentina
2009
A total of 49 records beaked whales stranded along approximately 900 km coast Santa Cruz Province, Argentina, were documented between 1895 and March 2023. These include 29 previously published unpublished (including one specimen re-identified through DNA analysis) 20 new records. All these involve at least seven species in five genera. strandings correspond to single individuals. The most frequent found Cuvier’s (Ziphius cavirostris) with 14 records, followed by strap-toothed (Mesoplodon...
Franciscana dolphins are small odontocetes hard to study in the field. In particular, little is known on their echolocation behavior wild. this we recorded 357 min and analyzed 1019 signals Rio Negro Estuary, Argentina. The clicks had a peak frequency at 139 kHz, bandwidth of 19 ranging from 130 149 kHz. This first describing franciscana wild, showing presence narrow-band high these dolphins. Whether they use other vocalizations communicate or not remains uncertain.
While the gene flow in some organisms is strongly affected by physical barriers and geographical distance, other highly mobile species are able to overcome such constraints. In southern South America, Andes (here up 6,900 m) may constitute a formidable barrier dispersal. addition, this region was cycles of intercalating arid/moist periods during Upper/Late Pleistocene Holocene. These factors have been crucial driving phylogeographic structure vertebrate fauna region. Here we test these...
Abstract The franciscana dolphin, Pontorporia blainvillei , is an endemic cetacean of the Atlantic coast South America. Its coastal distribution and restricted movement patterns make this species vulnerable to anthropogenic factors, particularly incidental bycatch. We used mitochondrial DNA control region sequences, 10 microsatellites, sex data investigate population structure dolphin from a previously established management area, which includes southern edge its geographic range. F...
Due to anthropogenic factors, the franciscana dolphin, Pontoporia blainvillei, is most threatened small cetacean on Atlantic coast of South America. Four Franciscana Management Areas have been proposed: Espiritu Santo Rio de Janeiro (FMA I), São Paulo Santa Catarina II), Grande do Sul Uruguay III), and Argentina IV). Further genetic studies distinguished additional populations within these FMAs. We analyzed population structure, phylogeography, demographic history in southernmost portion...
We add new localities to the distribution of bats families Molossidae and Vespertilionidae in southern Argentina. report southernmost known record for any bat species family world, which corresponds a locality Argentine province Santa Cruz, Tadarida brasiliensis . Also, records this are added provinces Chubut Río Negro. Additionally, we provide that extend some Vespertilionidae, by adding Histiotus magellanicus Lasiurus varius Chubut, montanus Cruz Myotis chiloensis Tierra del Fuego.
The main ecosystem in northern Patagonia, Argentina, is the Monte, a semi-desert scrubland home to high biodiversity. Monte most endangered of southern South America, with an annual rate clearance native vegetation estimated at 3.7%. Here we report results bird surveys carried out province Río Negro, Patagonia. We surveyed four localities mostly dominated by ecosystem, between 1986 and 2010. Three are Important Bird Areas (IBAs): El Cóndor, San Antonio Oeste Meseta de Somuncurá. fourth...
Abstract The effectiveness of conservation measures such as marine protected areas (MPAs) for the cetaceans is determined by how well their home range or critical habitat covered. present study seeks to provide information on site‐fidelity and movement patterns individual bottlenose dolphins ( Tursiops truncatus ) in central Argentina. Between 2007 2013, photo‐identification data were collected four sites some 90–200 km apart from each other along Argentinean coast. Results show long‐term...
The South American plains vizcacha, Lagostomus maximus inhabits primarily the Pampean and adjoining Espinal, Monte Chaquenean regions of Argentina. In order to study population genetic structure L. maximus, a fragment 560 bp mitochondrial DNA hypervariable region 1from 90 individuals collected from 3 subspecies 8 groups along Argentina was amplified analyzed. We found 9 haplotypes. haplotype network did not show an apparent phylogeographical signal. Although low levels variation were in all...
The ovaries of 31 franciscana dolphins (19 immature and 12 mature) by-caught in coastal waters Argentina were examined to describe the reproductive biology. No ovarian polarity was found, both functional showed similar amounts corpora. A positive trend observed between number corpora age (3–8 years old), indicating that ovulation scars are detectable for at least 4 years, a rate 0.39 found sampled population. Age, length weight sexual maturity estimated 3.92 ± 0.09 133.47 11.11 cm 32.68 2.72...
Abstract The Pleistocene glacial period shaped the current genetic structure of numerous species. last dynamics has been proposed to have split South American sea lion, Otaria flavescens, into two Evolutionarily Significant Units (ESUs), one on each side continent. However, previous studies not provided information colonies found along 3000 km coastline southernmost limit species distribution, where gene flow could occur. We conducted an exhaustive phylogeographical analysis O. flavescens...
European starlings (Sturnus vulgaris) were introduced ca. 40 years ago to South America, where they naturalized central and northern Argentina, now reaching some neighboring countries. While Patagonia (southern Argentina Chile) has remained free of (ES) in the past, are present along its boundary. Our objectives 1) investigate factors explaining this recent invasion, 2) predict how might expand across southernmost America based on niche modeling using landform, land cover, climatic variables...
In Argentina there have been few evaluations of Andean pseudocereal plantings. This study explored the response Amaranthus cruentus cv Mexicano to different plant densities under furrow irrigation in lower valley river Negro, Patagonia, Argentina. The experimental design consisted 3 blocks with randomized treatments (subplots), each one corresponding density. were sown rows spacing 0.70 m (one row per ridge) and others a 0.35 (two ridge). evaluated were: 70,800 - 84,200 97,700 116,000...
Abstract. Unprecedented cavity nesting among falconids: a Chimango Caracaras (Milvago chimango) population using Borruwing Parrots (Cyanoliseus patagonus) nests in Patagonia Argentina. The Caracara is the most abundant member of raptor assemblages from Paraguay and Bolivia to southern tip In Argentinian we studied other biological aspects that exploits cavities built by marine psittacines, unique ornithological assemblage: 12 km sea cliffs with 37,000 active Burrowing patagonus). During 56...
Abstract Counting animal populations is fundamental to understand ecological processes. Counts make it possible estimate the size of an population at specific points in time, which essential information for understanding demographic change. However, case large populations, counts are time‐consuming, particularly if carried out manually. Here, we took advantage convolutional neural networks (CNN) count total number nest‐entrances 222 photographs covering largest known Psittaciformes (Aves)...
Psittaciformes are among the most threatened birds, and population size trend estimates needed to aid conservation. The burrowing parrot Cyanoliseus patagonus is undergoing substantial changes in its size, due habitat degradation, trapping for pet trade, persecution as crop pest. species formerly had several large colonies, but these were severely reduced during a programme of agricultural pest control. Currently, only one colony remains, together with decreasing number smaller colonies...
Detailed here are records of 34 franciscanas (Pontoporia blainvillei) that stranded, including nine rescued alive and returned to sea, from the Río Negro Estuary, Patagonia, Argentina, between 2003 2023. The years with highest stranding were 2014 2020 (n = 6/ each). Autumn winter/spring seasons lowest number strandings, respectively. These strandings comprised 15 females, six males, 13 unknowns. Total body length females ranged 64 155 cm for males 70 138 cm. Five involved calves occurred...