A5069532287- Cephalopods and Marine Biology
- Marine Biology and Ecology Research
- Isotope Analysis in Ecology
- Marine and coastal plant biology
- Marine and fisheries research
- Species Distribution and Climate Change
- Coral and Marine Ecosystems Studies
- Crustacean biology and ecology
- Chemical synthesis and alkaloids
- Ichthyology and Marine Biology
- Parasite Biology and Host Interactions
- Neuroendocrine regulation and behavior
- Genetic diversity and population structure
- Neurobiology and Insect Physiology Research
- Marine animal studies overview
- Marine Bivalve and Aquaculture Studies
- Myxozoan Parasites in Aquatic Species
- Primate Behavior and Ecology
- Animal and Plant Science Education
- Marine Ecology and Invasive Species
- Veterinary Pharmacology and Anesthesia
- Insect and Arachnid Ecology and Behavior
- Meat and Animal Product Quality
- Hemispheric Asymmetry in Neuroscience
- Physiological and biochemical adaptations
Universidad Andrés Bello
2021-2025
University of Chile
2012-2021
Institute of Ecology and Biodiversity
2008-2014
Pontificia Universidad Católica de Chile
2014
Universidad Católica de la Santísima Concepción
2004-2005
The role of dispersal potential on phylogeographic structure, evidenced by the degree genetic structure and presence coincident biogeographic breaks, was evaluated in a macrogeographic comparative approach along north-central coast Chile, across transition zone at 30°S. Using 2,217 partial sequences mitochondrial Cytochrome Oxidase I gene eight benthic invertebrate species ca. 2,600 km coast, we contrasted with determined concordance between divergence regions Genetic diversity...
Here, we evaluate the so‐called Thorson's rule, which posits that direct‐development and larger eggs are favored toward poles in marine organisms whose validity been subject of considerable debate literature, combining an expanded phenotypic dataset encompassing 60 species benthic octopuses with a new molecular phylogeny. Phylogenetic reconstruction shows two clades: clade 1 including families Eledonidae, Megaleledonidae, Bathypolypodidae, Enteroctopodidae, 2 Octopodidae. Egg size,...
For the first time, field surveys for exploring diversity and composition of shallow-water polyplacophorans in West Antarctica have been conducted. During austral summer sampling campaigns 2022, 2023 2024, a total 1717 specimens four species were collected from 21 localities. The composition, abundance, estimate assemblages showed that richness decreased southward due to changes composition. ordination analysis high similarity among Thus, seven chiton previously recorded Antarctica, only...
Se describio y cuantifico la fauna parasitaria de 124 calamares (Dosidicus gigas) capturados en aguas oceanicas costeras Chile Central (32oS - 40oS). El 97% los presento al menos un taxon parasito. determino prevalencia abundancia para cada especie Cada parasitario se base a microscopia luz e imagenes electronica barrido. La estuvo compuesta por cestodos larvales: Hepatoxylon trichiuri (Abundancia: 2,6; Prevalencia: 70,2%), Tentacularia coryphaenae 0,1; 5,6%), plerocercoide Tetraphyllidea...
Feeding studies of pelagic sharks in Chilean waters are rare because the difficulty accessing and collecting stomachs.This paper is first contribution to knowledge diet juvenile P. glauca (Linnaeus, 1758), caught coastal zone central-southern Chile.We described 13 using frequency occurrence, percent by number weight quantitative indexes.The relationship between prey size predator was quantified with correlation analysis.Only 77% stomachs had food contents.One hundred contained Engraulis...
Deep‐sea octopuses of the genus Muusoctopus are thought to have originated in Pacific Northern Hemisphere and then diversified throughout into rest World Ocean. However, this hypothesis was inferred only from molecular divergence times. Here, ancestral distribution dispersal routes estimated by Bayesian analysis based on a new phylogeny including 38 specimens south‐eastern Morphological data sequences three mitochondrial genes (16S rRNA , COI COIII ) presented. The morphological confirm that...
Abstract Aim The distribution and genetic composition of marine populations is the result climatic oceanographic factors as well life history strategies. Studying species with wide distributions high dispersal potential in sites that were differentially affected during Pleistocene glaciations provides an opportunity to evaluate distributional effect on populations, such limpet Siphonaria lesonii . aim present study differential effects areas covered not by ice sheets glaciations. Location...
Abstract Aim To evaluate the latitudinal pattern of body size within and among chiton species employing phylogenetically structured analyses examine role ofgeographical variation in temperature, productivity oxygen availability as potential environmental drivers. Location Coastal habitats south‐eastern Pacific along a range nearly 6,000 km, from equator to Patagonia ( c . 2° 56° S). Time period Present (2011–2017). Major taxa studied Thirty‐one polyplacophoran molluscs. Methods We measured...
Se documenta una alta similitud en la composición de fauna parasitaria y dieta 108 ejemplares del pejesapo Gobiesox marmoratus Jenyns, 1842 recolectados costa zona centro-sur Chile, desde tres localidades separadas por al menos 400 km su(s) vecina(s).La longitud total los pejesapos fue similar entre su parasitofauna estuvo compuesta 16 taxa metazoos (incluyendo cinco Myxozoa).En el 38,8 % se encontraron parásitos, tanto que 32,4 mismos había contenido estomacal, determinaron 37 ítems...
The habitat and diet can vary through host ontogeny, and, therefore, affect its parasitic fauna. We examined the relationship between endoparasites of 124 Dosidicus gigas from coastal (73) oceanic areas (51) central Chile. numerical descriptors composition 82 stomach contents 120 infracommunities parasites were evaluated. A total 24 prey items identified in contents. composed 1544 individuals belonging to six taxa. Host mantle length best explained variation infracommunity descriptors, while...
Abstract The chiton genus Tonicia is composed of 12 species, 11 which are found in the eastern Pacific, but taxonomic status and geographical distribution these species have long been controversial. In this study, we compare Pacific using molecular systematics. markers cytochrome oxidase c subunit I (COI), 16S 18S ribosomal RNA were used to estimate phylogenetic relationships divergence times among species. Species delimitations inferred a Bayesian generalized mixed Yule coalescent (bGMYC)...
The systematics of the New Zealand octopods have only been reviewed twice in last 100 years. In these revisions many species provisionally classified genus Octopus. Recent genetic studies synonymized some with octopuses from other regions. present study investigates and phylogeny using eighty eight specimens, three mitochondrial genes (16S rRNA, cytochrome c oxidase subunit I III) one nuclear gene (Rhodopsin). Forty-four new octopod DNA sequences (belonging to 13 species) were included,...
One of the major mechanisms responsible for animals’ fitness dynamics is fecundity. Fecundity as a trait does not evolve independently, and rather interacts with other traits such body egg size. Here, our aim was to correctly infer macroevolutionary trade-offs between length, potential fecundity, using cephalopods study model. The correlated evolution among those inferred by comparative phylogenetic methods. Literature data on biological reproductive (body fecundity) obtained 90 cephalopod...
Abstract Intertidal communities’ composition and diversity usually exhibit strong changes in relation to environmental gradients at different biogeographical scales. This study represents the first comprehensive description of polyplacophoran assemblages along Peruvian Province (SE Pacific, 12°S–39°S), as a model system for ecological latitudinal gradients. A total 4,775 chitons from 21 species were collected on twelve localities Province. sampling allowed us quantitatively estimate relative...
Competition between same-sex organisms, or intra-sexual selection, can occur before and after mating, include processes such as sperm competition cryptic female choice. One of the consequences selection is that male reproductive traits tend to evolve diverge at high rates. In benthic octopuses, females often mate with more than one in a single event, opening venue for multiple levels. For instance, males transfer spermatophores through hectocotylus, remove left by other males. Considering...
Cirrate octopods are considered to resemble the ancestor of all octopuses. Cirrates inhabit deep ocean and characterized by presence fins, a cartilaginous inner shell single row suckers alternating with pairs cirri thus comprising uniserial biserial cirri. The objective this contribution is improve taxonomy Opisthoteuthis bruuni from southeastern Pacific Ocean suggest new hypothesis cirrate phylogeny. Given that most complete molecular data set for cirrates available in public databases...