Search Results - "Levitan, Don R."

Do Sperm Really Compete and Do Eggs Ever Have a Choice? Adult Distribution and Gamete Mixing Influence Sexual Selection, Sexual Conflict, and the Evolution of Gamete Recognition Proteins in the Sea by Levitan, Don R.

“…The evolution of gametic compatibility and the effectiveness of compatibility, within and across species, depend on whether sperm from different males directly…”
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Weak prezygotic isolating mechanisms in threatened Caribbean Acropora corals by Fogarty, Nicole D, Vollmer, Steven V, Levitan, Don R

“…The Caribbean corals, Acropora palmata and A. cervicornis, recently have undergone drastic declines primarily as a result of disease. Previous molecular…”
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Selection on Gamete Recognition Proteins Depends on Sex, Density, and Genotype Frequency by Levitan, Don R, Ferrell, David L

“…Gamete recognition proteins can evolve at astonishing rates and lie at the heart of reproductive isolation and speciation in diverse taxa. However, the source…”
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Metabolic scaling in modular animals by Burgess, Scott C., Ryan, Will H., Blackstone, Neil W., Edmunds, Peter J., Hoogenboom, Mia O., Levitan, Don R., Wulff, Janie L.

“…Metabolic scaling is the relationship between organismal metabolic rate and body mass. Understanding the patterns and causes of metabolic scaling provides a…”
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Optimal Egg Size in Marine Invertebrates: Theory and Phylogenetic Analysis of the Critical Relationship between Egg Size and Development Time in Echinoids by Levitan, Don R.

“…Life‐history models for marine invertebrate larvae generally predict a dichotomy in egg size in different species: eggs should be either minimal in size or…”
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Evolution of prey in ecological time reduces the effect size of predators in experimental microcosms by terHorst, Casey P, Thomas E. Miller, Don R. Levitan

“…Ecologists have long studied the effect of predators on prey population abundance while evolutionary biologists have measured prey trait evolution in response…”
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Modeling How Reproductive Ecology Can Drive Protein Diversification and Result in Linkage Disequilibrium between Sperm and Egg Proteins by Tomaiuolo, Maurizio, Levitan, Don R.

“…Gamete‐recognition proteins determine whether sperm and eggs are compatible at fertilization, and they often evolve rapidly. The source of selection driving…”
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Linking photoacclimation responses and microbiome shifts between depth-segregated sibling species of reef corals by Prada, Carlos, López-Londoño, Tomás, Pollock, F Joseph, Roitman, Sofia, Ritchie, Kim B, Levitan, Don R, Knowlton, Nancy, Woodley, Cheryl, Iglesias-Prieto, Roberto, Medina, Mónica

“…Metazoans host complex communities of microorganisms that include dinoflagellates, fungi, bacteria, archaea and viruses. Interactions among members of these…”
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THE RISK OF POLYSPERMY IN THREE CONGENERIC SEA URCHINS AND ITS IMPLICATIONS FOR GAMETIC INCOMPATIBILITY AND REPRODUCTIVE ISOLATION by Levitan, Don R, terHorst, Casey P, Fogarty, Nicole D

“…Developmental failure caused by excess sperm (polyspermy) is thought to be an important mechanism driving the evolution of gamete-recognition proteins,…”
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Sex‐Specific Spawning Behavior and Its Consequences in an External Fertilizer by Levitan, Don R.

“…Identifying the target of sexual selection in externally fertilizing taxa has been problematic because species in these taxa often lack sexual dimorphism…”
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Sea urchin mass mortalities 40 y apart further threaten Caribbean coral reefs by Levitan, Don R, Best, Rachael M, Edmunds, Peter J

“…In 1983 to 1984, a mass mortality event caused a Caribbean-wide, >95% population reduction of the echinoid grazer, . This led to blooms of algae contributing…”
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The evolution of gametic compatibility and compatibility groups in the sea urchin Mesocentrotus franciscanus: An avenue for speciation in the sea by Levitan, Don R., Buchwalter, Rebecca, Hao, Yueling

“…The generation of reproductive incompatibility between groups requires a rare genotype with low compatibility to increase in frequency. We tested the…”
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CONTEMPORARY EVOLUTION OF SEA URCHIN GAMETE-RECOGNITION PROTEINS: EXPERIMENTAL EVIDENCE OF DENSITY-DEPENDENT GAMETE PERFORMANCE PREDICTS SHIFTS IN ALLELE FREQUENCIES OVER TIME by Levitan, Don R.

“…Species whose reproductive strategies evolved at one density regime might be poorly adapted to other regimes. Field and laboratory experiments on the sea…”
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Interpopulation variation in inbreeding is primarily driven by tolerance of mating with relatives in a spermcasting invertebrate by Olsen, Kevin C., Levitan, Don R.

“…The degree to which individuals inbreed is a fundamental aspect of population biology shaped by both passive and active processes. Yet, the relative influences…”
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Long-term reduced spawning in Orbicella coral species due to temperature stress by Levitan, Don R., Boudreau, William, Jara, Javier, Knowlton, Nancy

“…We examined the long-term reproductive consequence of bleaching stress on Caribbean corals in the Orbicella (formerly Montastraea) species complex (O…”
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The Role of Male Variation in Fertilization Success in Determining the Costs and Benefits of Polyandry in the Broadcast Spawning Urchin Lytechinus variegatus by BETTERS, MELISSA, LEVITAN, DON R.

“…Although the benefits to males mating with multiple females have been well documented, the benefits to females mating with multiple males (polyandry) are less…”
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Effects of gamete traits on fertilization in the sea and the evolution of sexual dimorphism by Levitan, Don R

“…Laboratory experiments on sea urchins demonstrate that intraspecific differences in gamete attributes, such as egg size, can influence rates of fertilization…”
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The Sexually Dichromatic Use of Chromatophores for Cryptic Coloration in the Shrimp Neopontonides beaufortensis by Best, Rachael M., Swan, Ally L., Ellsworth, Schyler A., Levitan, Don R.

“…Sexual dimorphism typically arises as a result of sexual selection or sex-specific natural selection. Species that exhibit cryptic coloration provide an…”
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SIMULTANEOUS POSITIVE AND NEGATIVE FREQUENCY-DEPENDENT SELECTION ON SPERM BINDIN, A GAMETE RECOGNITION PROTEIN IN THE SEA URCHIN STRONGYLOCENTROTUS PURPURATUS by Levitan, Don R., Stapper, Andres Plata

“…Gamete-recognition proteins often, but not always, evolve rapidly. We explored how variation in sperm bindin influences reproductive success of the sea urchin…”
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Inbreeding shapes the evolution of marine invertebrates by Olsen, Kevin C., Ryan, Will H., Winn, Alice A., Kosman, Ellen T., Moscoso, Jose A., Krueger-Hadfield, Stacy A., Burgess, Scott C., Carlon, David B., Grosberg, Richard K., Kalisz, Susan, Levitan, Don R.

“…Inbreeding is a potent evolutionary force shaping the distribution of genetic variation within and among populations of plants and animals. Yet, our…”
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