Pigmentation pattern formation in the buttery wing of Papilio dardanus

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A Model for Colour Pattern Formation in the Butterfly Wing of Papilio dardanus

The butterfly Papilio dardanus is well know for the spectacular phenotypic polymorphism in the female of the species. We show that numerical simulations of a reaction diffusion model on a geometrically accurate wing domain produce spatial patterns that are consistent with many of those observed on the butterfly. Our results suggest that the wing coloration is due to a simple underlying stripe-like pattern of some pigment inducing morphogen. We focus on the effect of key factors such as parameter values for model selection, threshold values which determine colour, wing shape and boundary conditions. The generality of our approach should allow us to investigate other butterfly species

The moving grid finite element method applied to biological problems

This paper seeks to present a novel numerical technique, the moving grid finite element method, to solve generalised Turing reaction-diffusion type models on continuously deforming growing domains. Applications to bivalve ligaments and pigmentation colour patterns in the wind of the butterfly Papilio dardanus will be considered, by way of examples

The moving grid finite element method applied to biological problems, In Morphogenesis and Pattern Formation in Biological Systems: Experiments and Models

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A Predictive Model for Color Pattern Formation in the Butterfly Wing of Papilio dardanus

Previously, we have proposed a mathematical model based on a modified Turing mechanism to account for pigmentation patterning in the butterfly wing of Papilio dardanus, well-known for the spectacular phenotypic polymorphism in the female of the species (Sekimura, et al., Proc. Roy. Soc. Lond. B 267, 851-859 (2000)). In the present paper, we use our model to predict the outcome of a number of different types of cutting experiments and compare our results with those of a model based on different hypotheses.\ud \ud This paper is dedicated to Professor Masayasu Mimura on his sixtieth birthda

Implications of domain growth in morphogenesis

Domain growth can play an important role in pattern formation during early embryonic development. By considering the Turing reaction-diffusion model for pattern formation, we show how growth can influence patterning. We consider how growth affects mode selection and robustness of patterns. Specifically, we investigate ligament patterns in arcoid bivalves

Neighborhood Food Infrastructure and Food Security in Metropolitan Detroit

Concern about spatial access to food retailers and its relationship to household food security has increased in recent years, placing greater importance on understanding how proximity to food retailers is related to household food consumption. Using data from the Michigan Recession and Recovery Study (MRRS), a panel survey of working‐age adults in the Detroit Metropolitan Area, this article explores whether access to the food retailers is associated with food insecurity. We use unique data about food retailers in metropolitan Detroit to develop an array of food retailer access measures that account for distance to nearest retailer, density of retailers, commute times, mode of transit, and type of retailer. Across most measures, we find that many vulnerable population groups have greater or at least comparable spatial access to food resources as less vulnerable populations groups. There is little evidence, however, that greater access to food retailers is associated with food security

Medical Countermeasures for Radiation Induced Health Effects: Reports of an Interagency Panel Session Held at the NASA Human Research Program Investigator's Workshop, January 26, 2017

An Interagency Panel Session organized by the NASA Human Research Program Space Radiation Program Element (SRPE) was held during the NASA Human Research Program (HRP) Investigators Workshop (IWS) in Galveston, Texas on January 26, 2017 to identify complementary research areas that will advance the testing and development of medical countermeasures (MCM) in support of radioprotection and radiation mitigation on the ground and in space. There were several areas of common interest identified among the various participating agencies. This report provides a summary of the topics discussed by each agency along with potential areas of intersection for mutual collaboration opportunities. Common goals included repurposing of pharmaceuticals, neutraceuticals for use as radioprotectors and/or mitigators, low-dose/chronic exposure paradigms, late effects post-radiation exposure, mixed-field exposures of gamma-neutron, performance decrements, and methods to determine individual exposure levels