A5088890768- Marine animal studies overview
- Ichthyology and Marine Biology
- Identification and Quantification in Food
- Fish Biology and Ecology Studies
- Genetic diversity and population structure
- Fish Ecology and Management Studies
- Turtle Biology and Conservation
- Fish biology, ecology, and behavior
- Marine and coastal plant biology
- Isotope Analysis in Ecology
- Environmental DNA in Biodiversity Studies
- Wildlife Ecology and Conservation
- Aquaculture disease management and microbiota
- Cephalopods and Marine Biology
- Marine Bivalve and Aquaculture Studies
- Amphibian and Reptile Biology
- Genomics and Phylogenetic Studies
- Marine and fisheries research
- Coral and Marine Ecosystems Studies
- Animal Vocal Communication and Behavior
- Marine Ecology and Invasive Species
- Avian ecology and behavior
- Bat Biology and Ecology Studies
- Mercury impact and mitigation studies
- Forensic and Genetic Research
Group for the Analysis of Development
2025
Universidad de Los Andes
2015-2024
Nova Southeastern University
2024
Instituto Antártico Chileno
2023
Sphere Institute
2023
Fundación Valle del Lili
2023
NOAA National Marine Fisheries Service Northeast Fisheries Science Center
2023
Migration Institute of Australia
2021-2022
STMicroelectronics (France)
2022
Universidad de Los Andes
2014-2021
To investigate movements of humpback whales among breeding and migratory areas Oceania in the South Pacific Ocean, comparisons individually identified were undertaken using catalogues from New Caledonia, Tonga, Zealand, Cook Islands French Polynesia. These locations probably represent wintering grounds or for Group V VI stocks, as recognised by International Whaling Commission management purposes. Comparisons also made to small samples photos Colombia, Ecuador Antarctic Peninsula,...
The world's river dolphins (Inia, Pontoporia, Lipotes and Platanista) are among the least known most endangered of all cetaceans. four extant genera inhabit geographically disjunct systems exhibit highly modified morphologies, leading many cetologists to regard as an unnatural group. Numerous arrangements have been proposed for their phylogenetic relationships one another other odontocete These alternative views strongly affect biogeographical evolutionary implications raised by important,...
The availability of mitochondrial genome sequences is growing as a result recent technological advances in molecular biology. In phylogenetic analyses, the complete mitogenome increasingly becoming marker choice, usually providing better resolution and precision relative to traditional markers such cytochrome b (CYTB) control region (CR). some cases, differences estimates between mitogenomic single-gene have yielded incongruent conclusions. By comparing made from different genes, we...
The Andean bear is an endemic species of the tropical Andes who has almost exclusively plant-based diet. Since herbivorous mammals do not carry enzymes for fiber degradation, establishment symbiosis with cellulolytic microorganisms in their gastrointestinal (GI) tract necessary to help them fulfill nutritional needs. Furthermore, as described other mammals, a stable, diverse and balanced gut microbial composition indicator healthy status host; under disturbances this balance can be lost,...
Over the past 4 decades there has been a growing concern for conservation status of elasmobranchs (sharks and rays). In 2002, first elasmobranch species were added to Appendix II Convention on International Trade in Endangered Species Wild Fauna Flora (CITES). Less than 20 yr later, 39 5 I. Despite concern, effective management remain challenged by lack data population many species, human−wildlife interactions, threats viability, efficacy approaches. We surveyed 100 most frequently published...
Abstract The three living species of manatees, West Indian (Trichechus manatus), Amazonian inunguis) and African senegalensis), are distributed across the shallow tropical subtropical waters America western coast Africa. We have sequenced mitochondrial DNA control region in 330 Trichechus to compare their phylogeographic patterns. In T. manatus we observed a marked population structure with identification haplotype clusters showing distinct spatial distribution. A geographic barrier...
Abstract Dolphins of the genus Sotalia are found along Caribbean and Atlantic coasts Central South America in Amazon River most its tributaries. At present, taxonomy these dolphins remains unresolved. Although five species were described late 1800s, only one is recognized currently ( fluviatilis ) with two ecotypes or subspecies, coastal subspecies guianensis riverine ). Recent morphometric analyses, as well mitochondrial DNA analysis, suggested recognition each separate species. Here we...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 330:257-268 (2007) - doi:10.3354/meps330257 Population structure of South Pacific humpback whales and origin eastern Polynesian breeding grounds C. Olavarría1,2, Scott Baker1,14,*, Garrigue3, M. Poole4, N. Hauser5, S. Caballero1,6, L. Flórez-González6, Brasseur7, J. Bannister8, Capella6, P. Clapham9, R....
Bottlenose dolphins (Tursiops truncatus) occupy a wide range of coastal and pelagic habitats throughout tropical temperate waters worldwide. In some regions, "inshore" "offshore" forms or ecotypes differ genetically morphologically, despite no obvious boundaries to interchange. Around New Zealand, bottlenose inhabit 3 regions: Northland, Marlborough Sounds, Fiordland. Previous demographic studies showed interchange individuals among these populations. Here, we describe the genetic structure...
There has been an increasing concern about shark overexploitation in the last decade, especially for open ocean species, where there is a paucity of data their life histories and population dynamics. Little known regarding structure pelagic thresher shark, Alopias pelagicus. Though earlier study using mtDNA control region data, showed evidence differences between eastern western Pacific populations, was hampered by low sample size sparse geographic coverage, particularly lack samples from...
Information on the genetic characterisation of humpback whales (Megaptera novaeangliae) wintering off Ecuador (Breeding Stock G) is presented. Mitochondrial DNA was extracted and sequenced from 230 skin samples collected between 2002 2008 to establish diversity this population. From 182 usable samples, 41 different haplotypes were found, eight which new unique. Haplotype (h ± SD) estimated be 0.922 0.012 nucleotide (π 0.019 0.009. A comparison with other areas within Southeast Pacific...
El objetivo de la presente investigación fue identificar si existe un impacto diferenciado en el acceso y uso aplicativo lectura (Booksmart, Worldreader) entre estudiantes que utilizaron tabletas comparados con aquellos móvil para acceder al recurso. También se buscó conocer las percepciones los actores involucrados sobre del cada dispositivo. Empleando diseño mixto concurrente, datos fueron recolectados año 2021 mediante llamadas telefónicas a docentes familias escuelas públicas periurbanas...
Abstract This study presents the first comprehensive genetic analyses of common bottlenose dolphin ( T ursiops truncatus ) based on mitochondrial DNA and microsatellite loci in W ider C aribbean. Live captures dolphins have been occurring since turn 20th century aribbean waters where little is known about their population structure diversity. In this study, blood or tissue samples were obtained from stranded captive nine geographic regions. One hundred fifty‐eight sequences control region...
Previous investigations of the population genetics scalloped hammerhead sharks (Sphyrna lewini) in Eastern Tropical Pacific have lacked information about nursery areas. Such areas are key to promoting conservation initiatives that can protect young from threats such as overfishing. Here, we investigated genetic diversity, phylogeography, and connectivity S. lewini found 3 Colombia's coast: around Malpelo Island 2 National Natural Parks on Colombian mainland (Sanquianga Ensenada de Utría). We...
Antillean manatees (Trichechus manatus manatus) are large herbivorous aquatic mammals living in limited areas of South, Central and North America. As with other mammals, can be infected by a variety protozoan metazoan parasites, some them zoonotic potential, which affect not only their welfare but also population health status. Therefore, we conducted the first epidemiological survey Colombian free-ranging to estimate actual gastrointestinal parasite status.In total, 69 faecal samples were...
A small number of cetaceans have adapted to an entirely freshwater environment, having colonized rivers in Asia and South America from ancestral origin the marine environment. This includes 'river dolphins', early divergence odontocete lineage, two species true dolphins (Family Delphinidae). Successful adaptation environment may required increased demands energy involved processes such as mitochondrial osmotic balance. For this reason, riverine odontocetes provide a compelling natural...
The current conservation status of the bottlenose dolphin (Tursiops truncatus) under IUCN is 'least concern'. However, in Caribbean, small and localized populations 'inshore form' may be at higher risk extinction than 'worldwide distributed due to a combination factors including population size, high site fidelity, genetic isolation, range overlap with human activities. Here, we study structure dolphins from Archipelago Bocas del Toro Panama. This characterized by fidelity currently...
Environmental DNA metabarcoding is a tool with increasing use worldwide. The uses of such technology have been validated several times for diversity census, invasive species detection, and endangered/cryptic/elusive detection monitoring. With the help this technology, water samples collected ( n = 37) from main river basins other bodies northern part Colombia, including Magdalena, Sinú, Atrato, San Jorge basins, were filtered analyzed processed using universal 12S primers vertebrate fauna...
Phylogeographic patterns and sex-biased dispersal were studied in riverine populations of West Indian (Trichechus manatus) Amazonian manatees (T. inunguis) South America, using 410bp D-loop (Control Region, Mitochondrial DNA) sequences 15 nuclear microsatellite loci. This multi-locus approach was key to disentangle complex gene flow among populations. analyses revealed population structuring all Colombian rivers for T. manatus, while data suggested no structure. Two main inunguis separating...
Skin mucus in fish is the first barrier between organism and environment but role of skin protecting against pathogens not well understood. During copulation sharks, male bites female generating wounds, which are then highly likely to become infected by opportunistic bacteria from water or shark’s mouth. Describing microbial component epithelial may allow future understanding this line defense sharks. In study, we analyzed samples obtained 19 individuals two shark species a stingray: nurse (...
Abstract As genomic-scale data sets become economically feasible for most organisms, a key question conservation biology is whether the increased resolution offered by new genomic approaches justifies repeating earlier studies based on traditional markers, rather than investing those same time and monetary resources in less-known species. Genomic offer clear advantages when objective to identify adaptive loci that may be critical policy-makers. However, answer far less certain population...
River cetaceans are particularly vulnerable to anthropogenic impacts due their constrained ranges in freshwater systems of China, South Asia, and America. We undertook an exhaustive review 280 peer-reviewed papers grey literature reports (1998-2020) examine the current status knowledge regarding these conservation. aimed better understand scale threats they face, identify propose priority future efforts conserve species. found that species have been studied with varying frequency most...
Here we consider the phylogeography and population structure of South American coastal riverine dolphins, Sotalia guianensis fluviatilis, based on samples (n = 76) collected across more than 9000km species distribution. Phylogenetic reconstruction 31 distinct haplotypes a combined analysis two mitochondrial gene fragments (1052bp) revealed clear genetic differences between individuals consistent with species-level ranking. Within species, spatial molecular variance control region sequences...