Fernanda Oyarzun

Fernanda Oyarzun
Universidad Católica de la Santísima Concepción | UCSC · Departamento de Ecología

PhD in Biology UW

About

76
Publications
3,558
Reads
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267
Citations
Introduction
1) Ecology and evolution of life history strategy of marine invertebrates. Larval Ecology. Parental Care in marine invertebrates. Plasticity. 2) Art & Science. interdisciplinary/transdisciplinary thinking. Science Visualization, Visualization of Information, Scientific Illustration, Editorial Design. Sculpture.
Education
September 2002 - January 2010
March 1996 - January 2020

Publications

Publications (76)
Article
Full-text available
The genus Sprattus comprises five species of marine pelagic fishes distributed worldwide in antitropical, temperate waters. Their distribution suggests an ancient origin during a cold period of the earth's history. In this study, we evaluated this hypothesis and corroborated the non-monophyly of the genus Sprattus, using a phylogenetic approach bas...
Article
Full-text available
Macrocystis pyrifera reaches distant areas after detachment, accumulate heavy metals, and serve as trophic subsidy. In this context, effects on both adults and larvae of Tetrapygus niger fed with polluted kelps were determined by assessing growth, fertility, and early larval development. Results revealed that sea urchins fed with polluted kelps fro...
Article
Macrocystis pyrifera reaches distant areas after detachment, accumulate heavy metals, and serve as trophic subsidy. In this context, effects on both adults and larvae of Tetrapygus niger fed with polluted kelp were determined by assessing growth, fertility, and early larval development. Results revealed that sea urchins fed with polluted kelp from...
Article
Full-text available
Elysia diomedea varies in adult size and color across its geographical distribution in Ecuador. Because of morphological variation and the absence of genetic information for this species in Ecuador, we analyzed mtDNA sequences in three populations (Ballenita, La Cabuya, and Mompiche) and confirmed that (1) individuals from the three locations belon...
Article
Poecilogony is a type of reproduction in which a species produces different types of larvae. Boccardia wellingtonensis, is a poecilogonous polychaete with females producing planktotrophic and adelphophagic larvae, in addition to nurse eggs, in the same capsule that differ in feeding behavior. It is still unclear why planktotrophs do not feed on nur...
Article
The level of parental investment for larval nutrition may determine the life cycle in marine invertebrate species laying egg masses or capsules, where the food available for enclosed individuals would determine time and developmental stage of hatching. Most species show a unique type of larval development. However, few species are poecilogonous and...
Article
Molluscan veliger larvae and some annelid larvae capture particulate food between a preoral prototrochal band of long cilia that create a current for both swimming and feeding and a postoral metatrochal band of shorter cilia that beat toward the prototroch. Larvae encountering satiating or noxious particles must somehow swim without capturing parti...
Article
Full-text available
In marine invertebrates, the modes of development at early stages are related to the type and capacity of larval feeding to achieve growth. Therefore, studying the factors that determine larval feeding strategies can help to understand the diversity of life histories and evolution of marine invertebrates. The polychaete Boccardia wellingtonensis is...
Article
Full-text available
Previous studies of population genetic structure in Dissostichus eleginoides have shown that oceanographic and geographic discontinuities drive in this species population differentiation. Studies have focused on the genetics of D . eleginoides in the Southern Ocean; however, there is little knowledge of their genetic variation along the South Ameri...
Data
Microsatellite genotypes for Disosstichus eleginoides Contains original individual genotypes in GENALEX format.
Data
Details of parameters of genetic variability for each sample location and locus in Dissostichus eleginoides
Data
Details of percentage of putative migrants and most likely origin area
Data
Graphs of allelic frequencies by cluster Blue bar correspond to South American Cluster (SAC) and red bar correspond to South of Georgia Cluster (SGC).
Data
Correlation between standardized genetic distances (FST∕1 − FST) and the logarithm of the geographic distance (km) among sampling sites (A) all possible pairwise combinations (in red SGI), and (B) pairwise excluding South Georgia Island samples.
Data
Principal Component Analysis (PCA) of sampled locations of the D. eleginoides Plot of the first two principal components calculated on the genotypic dataset. NP, Northern Peru; SP, Southern Peru; IQ, Iquique; GP, Gulf of Penas; PW, Puerto Williams; DRI, Diego Ramírez Islands; FI, Falkland Islands; SGI, South Georgia Island.
Article
The Patagonian sprat, Sprattus fuegensis, is a small pelagic marine fish that inhabits the continental shelf along the coasts of Chilean Patagonian and Argentina, a distribution that was highly impacted during the Last Glacial Maximum (LGM). In order to identify how the LGM played a role on the current observed genetic diversity and population stru...
Article
Full-text available
The external morphology of the egg and first instar of the little-known Neotropical geometrid moth Pero obtusaria Prout, 1928 (Lepidoptera: Geometridae: Ennominae: Azelinini) is described and illustrated based on light and scanning electron microscopy. This is the first morphological study dealing with immature stages of a Neotropical species of th...
Article
Poecilogony is the production of different larval types within the same species. Although rare, poecilogonous species are ideal systems for testing the evolutionary and ecological implication of different developmental modes in marine invertebrates. Here, we described a new case of poecilogony, the Southern Hemisphere spionid Boccardia wellingtonen...
Article
In poecilogony, different types of larvae are produced within the same species. Previous studies have suggested maternal control of the production of larval types; however, it is not clear which factors or mechanisms generate contrasting developmental patterns among siblings. The spionid polychaete Boccardia proboscidea produces within the same cap...
Article
Full-text available
The ability to produce more than one kind of offspring, or poecilogony, is a striking example of reproductive variability. Traditionally, larval nutrition has been classified as a dichotomy: if offspring obtain nutrition from their mothers (lecithotrophy), there is lower fecundity and greater chance of offspring survival than when they get their nu...
Article
Full-text available
Plasticity in hatching potentially adjusts risks of benthic and planktonic development for benthic marine invertebrates. The proportionate effect of hatching plasticity on duration of larval swimming is greatest for animals that can potentially brood or encapsulate offspring until hatching near metamorphic competence. As an example, early hatching...
Article
Full-text available
All organisms face two fundamental trade-offs in the allocation of energetic resources: one between many small versus a few large offspring, and the second between present and future reproduction. Nowhere are these trade-offs more apparent than in the vast range of variation in the sizes of eggs and offspring exhibited among species of marine inver...
Thesis
The ability to produce more than one kind of offspring, a phenomenon called poecilogony, is a striking example of reproductive variability. Traditionally, larval nutrition has been classified as a dichotomy: If offspring obtain nutrition from their mothers (lecithotrophy), there is lower fecundity and greater chance of offspring survival than when...
Article
Full-text available
South African cultured abalone, Haliotis midae, are commonly infested by the non-indigenous spionid polychaete, Boccardia proboscidea. This annelid species occurs naturally along the west coast of North America and around Japan, but has also been introduced in Hawaiʻi, Australia, New Zealand and perhaps the Iberian Peninsula. Reportedly, worms were...
Article
Full-text available
Marine reserves can help in maintaining biodiversity and potentially be useful as a fishery management tool by removing human-mediated impacts. Intertidal, soft-sediment habitats can often support robust recreational and commercial shellfish harvests, especially for clams; however, there is limited research on the effects of reserves in these habit...

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