Beach Seine Project

Assessing gillnet regulation in protected and unprotected areas on windward Oahu

Overview

  • In 2006 the use of laynets was restricted in certain locations through out the Hawaiian Islands to aid in conserving commercially important coastal fish populations.
  • This project’s goal is to demonstrate whether or not the laynet ban has or has not measurable impact on the abundance of fishes.

PullingLaynet

Beach Seine Results

  • Our preliminary results highlight the importance of these nearshore soft-bottom habitats as nursery areas for important resource species that are taken in the lay-gillnet fishery.
  • We have noted increases in the abundance of several species over time in Kailua; Oio and Papio in particular. We have also seen increases in Aholehole in both Kailua and Waimanalo.

Project Description

  • Monthly beach seining and fishing effort surveys have been conducted from January 2008 through December 2013.
  • To compare fish abundances beach seining was conducted at four sites along the windward coast of Oahu; one site with no laynet restrictions, one site with laynet restrictions, and two control sites.
  • Fishing activity was monitored from a high vantage point where one could observe an area across approximately 15 km of coastline and extending nearly 3 km from the shoreline in some locations.

TimeCPUEBeachSein

Fishing Effort Survey Results

Observations of fishing effort in the study area indicate that from 2008 to 2012 a shift in fishing effort has occurred. Total fishing effort has declined by nearly 50 percent in Kailua and increased by nearly 50 percent in Waimanalo during the same time period.

KailuaLanikaiWaimanalo

 

For more information contact Alan.Friedlander@hawaii.edu

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