A5059832760- Plant and animal studies
- Marine animal studies overview
- Evolutionary Game Theory and Cooperation
- Insect and Arachnid Ecology and Behavior
- Animal Behavior and Reproduction
- Evolution and Genetic Dynamics
- Insect and Pesticide Research
- Evolutionary Psychology and Human Behavior
- Arctic and Antarctic ice dynamics
- Marine and coastal plant biology
- CRISPR and Genetic Engineering
- Marine and fisheries research
- Genetic diversity and population structure
- Ion channel regulation and function
- Insect-Plant Interactions and Control
- Nicotinic Acetylcholine Receptors Study
- Demographic Trends and Gender Preferences
- Genomics and Phylogenetic Studies
- Ocean Acidification Effects and Responses
- Genetically Modified Organisms Research
- RNA and protein synthesis mechanisms
- Insect symbiosis and bacterial influences
- Cephalopods and Marine Biology
- Isotope Analysis in Ecology
- Olfactory and Sensory Function Studies
University of Utah
2014-2025
Severtsov Institute of Ecology and Evolution
2015
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2013
University of Illinois Urbana-Champaign
2001
Princeton University
1985-1986
University of Michigan
1983
University of Sussex
1980-1983
Harvard University
1976-1981
Abstract Ocean warming will undoubtedly affect the migratory patterns of many marine species, but specific changes can be predicted only where behavioural mechanisms guiding migration are understood. Southern right whales show maternally inherited site fidelity to near‐shore winter nursery grounds, exactly they feed in summer (collectively and individually) remains mysterious. They consume huge quantities copepods krill, their reproductive rates respond fluctuations krill abundance linked El...
Many insects rely on symbiotic microbes for survival, growth, or reproduction. Over evolutionary timescales, the association with intracellular symbionts is stabilized by partner fidelity through strictly vertical symbiont transmission, resulting in congruent host and phylogenies. However, little known about how symbioses extracellular symbionts, representing majority of insect-associated microorganisms, evolve remain stable despite opportunities horizontal exchange de novo acquisition from...
A two-species genetic model of host-parasite interaction is used to study the dynamical consequences varying number genotypes in each species, and recombination rate host. With two model's behaviour very simple; there either a stable interior equilibrium, cycle or smooth outward spiral toward boundaries. But with three more genotypes, complex cycles apparently chaotic may arise over wide ranges parameter values. Increasing also tends slow gene-frequency change. Recombination host does not...
A best-of-N rule of female mating preferences can give rise to lines unstable equilibria in a two-locus haploid model sexual selection. Under the rule, which corresponds choice at lek, male fitnesses exhibit form positive frequency-dependence that is not seen under fixed-relative-preference rules (Kirkpatrick, 1982). This be strongly destabilizing. Lande's (1981) criterion for stability quantitative-genetic models selection applies exactly and general related family simple population-genetic...
Abstract Neutral nucleotide diversity does not scale with population size as expected, and this “paradox of variation” is especially severe for animal mitochondria. Adaptive selective sweeps are often proposed a major cause, but plausible alternative selection against large numbers weakly deleterious mutations subject to Hill–Robertson interference. The mitochondrial genealogies several species whale lice (Amphipoda: Cyamus) consistently too short relative neutral-theory expectations, they...
Coalescent theory provides an elegant and powerful method for understanding the shape of gene genealogies resulting patterns genetic diversity. However, coalescent does not naturally accommodate effects heritable variation in fitness. Although some methods are available studying strong selection (Ns ≫ 1), few tools beyond forward simulation quantifying impact weak at many sites. Here, we introduce a continuous-state capable accurately describing distortions to caused by moderate natural...
Mitochondrial genes in animals are especially useful as molecular markers for the reconstruction of phylogenies among closely related taxa, due to generally high substitution rates. Several insect orders, notably Hymenoptera and Phthiraptera, show exceptionally rates mitochondrial evolution, which has been attributed parasitic lifestyle current or ancestral members these taxa. Parasitism hypothesized entail frequent population bottlenecks that increase evolution by reducing efficiency...
A specialized insulin was recently found in the venom of a fish-hunting cone snail, Conus geographus Here we show that many worm-hunting and snail-hunting cones also express insulins, this novel gene family has diversified explosively. Cone snails highly conserved their nerve ring; presumably conventional signaling is finely tuned to receptor, which evolves very slowly. By contrast, insulins diverge rapidly, apparently response biotic interactions with prey possibly cones' own predators...
Slightly deleterious mutations are expected to fix at relatively higher rates in small populations than large populations. Support for this prediction of the nearly-neutral theory molecular evolution comes from many cases which lineages inferred differ long-term average population size have different nonsynonymous substitution. However, most these cases, other ways as well, leaving open possibility that some factor might caused difference substitution rates. We compared synonymous and...
Most models of local mate competition assume that the foundresses contributing offspring to a mating group ('patch') all have same fecundity. Frank (1985, 1987a, b), Herre (1985), and Yamaguchi (1985) consider with variable fecundity, in which adjust their sex allocations response fecundities other patch. Here we generalize extend these include cases females can respond own but not each other's (possibly because they must determine before arrive at patch) siblings avoid other. Evolutionarily...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 493:275-289 (2013) - DOI: https://doi.org/10.3354/meps10506 Unexplained recurring high mortality of southern right whale Eubalaena australis calves at Penïnsula Valdïs, Argentina Victoria J. Rowntree1,2,3,4,*, Marcela M. Uhart1,5, Mariano Sironi1,4, Andrea Chirife1, Matias Di Martino1, Luciano La Sala1,...
Abstract Península Valdés ( PV ) in Argentina is an important calving ground for southern right whales SRW s, Eubalaena australis ). Since 2005, whale mortality has increased at , with most of the deaths (~90%) being calves <3 mo old. We investigated potential involvement harmful algal blooms HAB s) these by examining data that include: timing deaths, biotoxins samples from dead abundances diatom, Pseudo‐nitzschia spp., and dinoflagellate, Alexandrium tamarense shellfish harvesting...
Host-specific factors, including genetic background and sex, shape viral adaptation influence virulence, yet their interactions quantitative effects remain poorly understood. Additionally, multiple infections, where a host is infected with viruses from more than one source, are hypothesized to enhance diversity increase but impact in vertebrate hosts remains largely unexplored. We experimentally adapted influenza A virus (IAV) male female BALB/c C57BL/6 mice under single infection...
Abstract In the lac adaptive mutation system of Cairns, selected mutant colonies but not unselected types appear to arise from a nongrowing population Escherichia coli. The general mutagenesis suffered by mutants has been interpreted as support for idea that E. coli possesses an evolved (and therefore beneficial) mechanism increases rate in response stress (the hypermutable state model, HSM). This is proposed allow faster genetic adaptation stressful conditions and explain why mutations...
At least 626 southern right whale (Eubalaena australis) calves died at the Península Valdés calving ground, Argentina, between 2003 and 2014. Intense gull harassment may have contributed to these deaths. In 1970s, Kelp Gulls (Larus dominicanus) began feeding on skin blubber pecked from backs of living whales Valdés. The frequency attacks has increased dramatically over last three decades mother-calf pairs are primary targets. Pairs attacked by gulls spend less time nursing, resting playing...
Whales contribute to marine ecosystem functioning, and they may play a role in mitigating climate change supporting the Antarctic krill (Euphausia superba) population, keystone prey species that sustains entire Southern Ocean (SO) ecosystem. By analyzing five-decade (1971–2017) data series of individual southern right whales (SRWs; Eubalaena australis) photo-identified at Península Valdés, Argentina, we found marked increase whale mortality rates following El Niño events. modeling how...