Data from: Integration and modularity of teleostean pectoral fin shape and its role in the diversification of acanthomorph fishes
Du, Trina Y., McGill University, University of Ottawa
Tissandier, Sylvie C., McGill University
Larsson, Hans C. E., McGill University
Published Dec 12, 2018 on Dryad.
Cite this dataset
Du, Trina Y.; Tissandier, Sylvie C.; Larsson, Hans C. E. (2018). Data from: Integration and modularity of teleostean pectoral fin shape and its role in the diversification of acanthomorph fishes [Dataset]. Dryad. https://doi.org/10.5061/dryad.6cp0f00
Phenotypic integration and modularity describe the strength and pattern of interdependencies between traits. Integration and modularity have been proposed to influence the trajectory of evolution, either acting as constraints or facilitators. Here, we examine trends in the integration and modularity of pectoral fin morphology in teleost fishes using geometric morphometrics. We compare the fin shapes of the highly diverse radiation of acanthomorph fishes to lower teleosts. Integration and modularity are measured using two-block partial least squares analysis and the covariance ratio coefficient between the radial bones and lepidotrichia of the pectoral fins. We show that the fins of acanthomorph fishes are more tightly integrated but also more morphologically diverse and faster evolving compared to non-acanthomorph fishes. The main pattern of shape covariation in non-acanthomorphs is concordant with the main trajectory of evolution between non-acanthomorphs and acanthomorphs. Our findings support a facilitating role for integration during the acanthomorph diversification. Potential functional consequences and developmental mechanisms of fin integration are discussed.
Landmark data for pectoral fin integration and modularity
R data file containing list of unaligned landmarks of teleost pectoral fin skeleton, definition of sliding semi-landmarks, partition assignment, and taxonomic information.
R code for pectoral fin integration and modularity
R script for running disparity, integration, modularity, evolutionary rate, and evolutionary trajectory comparison between non-acanthomorph and acanthomorph teleosts.