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High-speed videos of siphonophore tentilla and nematocyst discharge

Citation

Damian-Serrano, Alejandro (2021), High-speed videos of siphonophore tentilla and nematocyst discharge, Dryad, Dataset, https://doi.org/10.5061/dryad.qjq2bvqfs

Abstract

Siphonophores are free-living predatory colonial hydrozoan cnidarians found in every ocean of the world. Siphonophore tentilla (tentacle side branches) are unique biological structures for prey capture, composed of a complex arrangement of cnidocytes (stinging cells) bearing different types of nematocysts (stinging capsules) and auxiliary structures. Tentilla present an extensive morphological and functional diversity across species. Tentilla have a precisely coordinated high-speed strike mechanism of synchronous unwinding and nematocysts discharge. Here we characterize the kinematic diversity of this prey capture reaction using high-speed video and find relationships with morphological characters.

Methods

Offshore live siphonophore tentilla and nematocyst discharge videos. Phantom Miro 320S High-Speed camera C-mounted on a stereoscopic microscope. Kinematic measurements taken from the original .cine files using PCC software and a static photograph of a ruler at the same magnification for scale. Cine files can be reconstituted from the mp4 and chd files.

Usage Notes

Install Phantom PCC software on a Windows PC. Batch convert MP4+chd files to CINE files. Open the scalebar image to set scale. Open the .cine file to measure accelerations, distances, and speeds.

Funding

Yale Institute of Biospheric Studies

Yale Institute of Biospheric Studies