Alex Eilers, September 1, 2008


NOAA Teacher at Sea
Alex Eilers
Onboard NOAA Ship David Starr Jordan
August 21 – September 5, 2008

Teacher at Sea Alex Eilers releasing an XBT

Teacher at Sea Alex Eilers releasing an XBT

Mission: Leatherback Sea Turtle Research
Geographical area of cruise: California
Date: September 1, 2008

Science Log

The second week has been absolutely fabulous as we found a leatherback – in fact we found three!!! This week has been all about the turtle: from identifying the biotic and abiotic conditions that define leatherback turtle habitat and foraging grounds, to tracking and tagging – we’ve done it all.

• Abiotic oceanographic data provided by scientific instruments such as XBTs (expendable bathythermographs), CTD (conductivity, temperature and depth), and water samples containing nutrient data to characterize the abiotic foraging habitats of the leatherback turtle.

Alex working with the CTD device

Alex working with the CTD device

• Net tow samples characterized the biotic conditions such as the jellyfish species prevalent in the turtle diet: moon jellies, sea nettles, and egg yolk jellies.

Alex Eilers measuring a moon jelly

Alex Eilers measuring a moon jelly

Egg yolk jelly with pipefish and larval rex sole

Egg yolk jelly with pipefish and larval rex sole

Tracking the turtles via air surveillance and handheld antenna

Tracking the turtles via handheld antenna

Aerial survellance

Aerial surveillance

Tagging a big leatherback

Tagging a big leatherback