Item Identification

Title: Akule aerial survey 2015 and 2017
Status: Completed
Abstract:

The bigeye scad (Selar crumenophthalmus, locally known as akule) is an important food source for many Hawaiians and represents one of the most productive near-shore fisheries in Hawai'i. These fish occupy an intermediate trophic link between the coastal environment in which they feed and the pelagic environment of their predators. Akule are largely fished using surround nets deployed from a fishing boat. Boats frequently work in tandem with spotter planes to efficiently target the most advantageous schools. These spotter planes provide the means for a fishery-independent estimate of abundance based on direct observation, which may prove more sensitive to population trends than traditional estimates based on reported commercial catch and effort. An experienced spotter pilot was utilized to locate and estimate the biomass of akule schools surrounding the island of O'ahu for the 2015-2016 fishing season following a standardized schedule and protocol. The aerial survey data were then used to create fishery-independent indices of abundance at varying temporal and spatial scales to compare with indices generated from commercial catch and effort data. The data also allowed for a better understanding of akule spatial and temporal patterns around O'ahu. Trends among fishery-dependent and fishery-independent indices of abundance were similar. The western region of O'ahu has the highest index value, exceeding each of the other three regions by two to three times. A clear temporal trend was also observed; indices increased from the lowest values during the beginning season (November – January) to the highest values during the peak season (May – July). The corresponding fishing operation was also monitored, and the average catch totaled 20% of the targeted school when using surround gill nets.

Purpose:

Estimate biomass of akule schools around Oahu using plane and spotter pilot to determine if index of fishery-independent biomass estimation differs from index from catch and effort data reported to DAR. Secondarily, to confirm that aerial estimates are accurate or at least to understand the bias associated with estimating school size.

Notes:

Work done with the Council and Commercial Fisher through Cooperative Research Program.

Keywords

Theme Keywords

Thesaurus Keyword
None FRMD
None PIFSC
None SAP

Physical Location

Organization: Pacific Islands Fisheries Science Center
City: Honolulu
State/Province: HI
Country: USA

Project Information

Project Type: Project
Is Mandated?: No
Collection Authority: Federal
Collection Method: Electronic, Paper, Photographic,Biological Samples

Support Roles

Distributor

CC ID: 825553
Date Effective From: 2019
Date Effective To:
Contact (Organization): Pacific Islands Fisheries Science Center (PIFSC)
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Phone: 808-725-5300
URL: http://www.pifsc.noaa.gov
Business Hours: 8:00 a.m. - 4:30 p.m.

Metadata Contact

CC ID: 825554
Date Effective From: 2019
Date Effective To:
Contact (Person): Langseth, Brian J
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: brian.langseth@noaa.gov
Phone: 808-725-5603

Point of Contact

CC ID: 825555
Date Effective From: 2019
Date Effective To:
Contact (Person): Langseth, Brian J
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: brian.langseth@noaa.gov
Phone: 808-725-5603

Principal Investigator

CC ID: 825556
Date Effective From: 2019
Date Effective To:
Contact (Person): Langseth, Brian J
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: brian.langseth@noaa.gov
Phone: 808-725-5603

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 825558
Description

Oahu, Hawaii

Extent Group 1 / Time Frame 1

CC ID: 825560
Time Frame Type: Range
Start: 2017
End: 2018

Extent Group 1 / Time Frame 2

CC ID: 825559
Time Frame Type: Range
Start: 2015
End: 2016

Access Information

Security Class: Sensitive
Data Access Procedure:

Send written request to PIFSC and requires approval by the PIFSC data owner.

Data Access Constraints:

Requires signing a PIFSC non-disclosure statement for fisheries confidential data.

Metadata Access Constraints:

None

Metadata Use Constraints:

None

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
80
Data Set (DS) 2015 Akule Aerial Survey Data
80
Data Set (DS) 2017 Akule Drone Survey Data

Catalog Details

Catalog Item ID: 55679
Metadata Record Created By: Brian J Langseth
Metadata Record Created: 2019-02-27 15:02+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2019-06-04 13:14+0000
Metadata Record Published: 2019-07-25
Owner Org: PIFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2020-07-25