Bottom longline surveys of elasmobranchs and teleosts in Coastal Alabama, Mississippi, and the Chandeleur Islands in 2016

Abstract

Catch and individual measurements from all organisms captured on bottom longline surveys in Coastal Alabama, Mississippi, and the Chandeleur Islands in 2016. Bottom longline gear type consists of 1.85 km (1 nm) of 4 mm monofilament (545 kg test) set with 100 gangions. Gangions are composed of a longline snap and a 15/0 circle hook, baited with Atlantic mackerel (Scomber scombrus). Each gangion is made of 3.66 m of 3 mm (320 kg test) monofilament. Sampling occurs twice per year (spring and fall), three days per season. All organisms were enumerated by species, measured (to the nearest mm fork length), weighed (to the nearest kg), tagged, and released.

Purpose

Our purpose was to assess the species diversity of apex and mesopredators across the Northern Gulf of Mexico and measure any shifts in community assemblages, as well as note any residual effects from the Deepwater Horizon oil spill.

DOI: doi:10.7266/N7BG2MFC

Suggested Citation

J. Marcus Drymon. 2017. Bottom longline surveys of elasmobranchs and teleosts in Coastal Alabama, Mississippi, and the Chandeleur Islands in 2016. Distributed by: Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC), Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7BG2MFC

Related Publication Citation

Seubert, E. A., Hussey, N., Powers, S. P., Valentine, J. F., & Drymon, J. M. (2019). Assessing trophic flexibility of a predator assemblage across a large estuarine seascape using blood plasma stable isotope analysis. Food Webs, 21, e00132. doi:10.1016/j.fooweb.2019.e00132

Funded by: Gulf of Mexico Research Initiative (GoMRI)

Funding cycle: RFP-IV

Research group: Alabama Center for Ecological Resilience (ACER)