ForgingWeapons

Codes and dataset of the paper entitled "Fight intensity correlates with stronger and more mechanically efficient weapons in three species of Aegla crabs", published in Behavioral Ecology and Sociobiology.

If you use anything from this repository, please cite the paper:

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Palaoro, AV; Peixoto, PEC; Benso-Lopes, F; Boligon, DS & Santos, S (2020) Fight intensity correlates with stronger and more mechanically efficient weapons in three species of Aegla crabs. Behavioral Ecology and Sociobiology. DOI: 10.1007/s00265-020-02834-z

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File summary:

Biomech-GMM-Analyses: R code. Code that organizes the data in the .xlsx file, loads the TPS files and run all analyses contained in the paper

males-morpho-data.xlsx: dataset. Dataset with all the data used in the analyses of the manuscript, except fofr the shape files.

male-aeglids.tps: shape file. File containing the 17 landmarks (6 landmarks and 11 semi-landmarks) digitized on the claws. The order of the individuals in this file is the same that you will find in the dataset. For more information on the location of the landmarks and semi-landmarks. Please see Figure 1 in the paper.

Dataset metadata:

Measures	Unit	Legend
ceph.length	mm	Cephalothorax length
claw.length	mm	Propodus length
claw.height	mm	Propodus height
in.lever	mm	Distance from the fulcrum to the base of the dactyl
out.lever1	mm	Distance from the fulcrum to the first tubercle on the dactyl
out.lever2	mm	Distance from the fulcrum to the tip of the dactyl
ma1	-	Mechanical advantage = in.lever/out.lever1
ma2	-	Mechanical advantage = in.lever/out.lever2
maT	-	Maximum mechanical advantage
apodeme	mm-squared	Area of the cuticle in which the muscle attachs to close the claw
icf	-	Index of closing force = Apodeme times the mechanical advantage
ID	-	Number of the individual
name	-	Code on the tag of the individual in the photo. Used in the TPS file
sex	-	Only males
species	-	Three levels. Either Aegla abtao, Aegla longirostri, or Aegla denticulata