Effects of preferential primary consumer fishing on lower trophic level herbivores in the Line Islands

Placeholder Show Content


In this study we document the biomass of Parrotfish and Surgeonfish in Christmas Island, Fanning Island, and Palmyra Atoll. The three islands exhibit a gradient of fishing pressure, which results in varying levels of apex predators affecting the biomass of herbivores. At three sites with comparable conditions between the islands, we identified species’ and estimated fish size in order to determine a biomass density. We also observed the feeding rates of the most common herbivore fish species at each island to establish the grazing rate. We observed very high herbivore biomass at Palmyra and correspondingly high grazing rates which bring about questions of what exactly is the connection between these herbivores and the health of the reef. This question, in turn, must be considered for future management of reefs.


Type of resource text
Date created June 9, 2005


Author Egan, Logan Zane
Author Téllez, Jesús Javier


Subject Stanford@SEA
Subject S-199
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
Subject Parrotfish
Subject Surgeonfish
Subject Christmas Island
Subject Kiribati Island
Subject Fanning Island
Subject Palmyra Atoll
Subject Palmyra
Subject Kiribati
Subject Fanning
Subject fishing pressure
Subject apex predator
Subject herbivore
Subject fish size
Subject biomass density
Subject feeding rate
Subject grazing rate
Subject reef
Genre Student project report

Bibliographic information

Access conditions

Use and reproduction
User agrees that, where applicable, content will not be used to identify or to otherwise infringe the privacy or confidentiality rights of individuals. Content distributed via the Stanford Digital Repository may be subject to additional license and use restrictions applied by the depositor.
This work is licensed under a Creative Commons Attribution 3.0 Unported license (CC BY).

Preferred citation

Preferred Citation
Egan, Logan Zane; Téllez, Jesús Javier. 2005. Effects of preferential primary consumer fishing on lower trophic level herbivores in the Line Islands. Unpublished Student Work, S-199, Stanford@SEA, Stanford Digital Repository. https://purl.stanford.edu/dk711xt5587.


Contact information

Also listed in

Loading usage metrics...