Gelatinous Organism Observations.

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Abstract/Contents

Abstract: This study tests the validity of examining the distribution of jellyfish and gelatinous plankton in the Pacific equatorial currents through the use of visual footage. Given the difficulty of studying gelatinous organisms through net tows and the high costs of using a Remotely Operated Vehicle (ROV) to track jellies, a GoPro camera was towed on a batwing to film gelatinous organisms in situ. An automated program for tracking jellies, The Jelly Counter, was tested on the footage, and manual organism counts were also taken by eye. The data gathered demonstrated that in situ videos from a forward- facing camera can be used to answer biological questions about gelatinous organisms. Data was taken at six different stations between the South Equatorial Current (SEC) and the North Pacific Gyre. The study analyzed organism abundance across stations, across depths within stations, and in relation to chlorophyll-A data. Organism density increased significantly north of the equator approaching the North Equatorial Current (NEC) and the Oxygen Minimum Zone (OMZ), and depths with higher concentrations of gelatinous organisms appeared to exhibit less fluorescence. Corresponding meter net tows also verified the new method’s ability to detect patterns in gelatinous organism density. If further standardized to ensure consistent data, high quality GoPro video recordings towed on a batwing can become a viable mode of counting gelatinous organisms in the future.

Type of resource	text
Date created	June 13, 2015

Author	Jue, Kylie
Author	Prior-Palmer, Lara

Subject	gelatinous plankton
Subject	plankton ecology
Subject	oxygen minimum zone
Subject	Stanford@SEA
Subject	S-259
Subject	Hopkins Marine Station
Subject	Department of Biology
Subject	Department of Earth System Science
Subject	BIOHOPK 182H
Subject	BIOHOPK 323H
Subject	EARTHSYS 323
Subject	ESS 323
Genre	Article

Location	https://purl.stanford.edu/sw827xp3684

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License: This work is licensed under a Creative Commons Attribution 3.0 Unported license (CC BY).

Preferred Citation: Jue, Kylie and Prior-Palmer, Lara. 2015. Gelatinous Organism Observations. Unpublished student research paper, S-259, Stanford@SEA, Stanford Digital Repository. https://purl.stanford.edu/sw827xp3684

Stanford@SEA -- Student papers

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