Satellite Tagged Net Locations NWHI 2018 - 2021

This pilot study follows the movements of 6 derelict fishing nets over time to study how far derelict nets can travel within an atoll, and how long they remain stationary. Six floating derelict fishing nets were located and tagged with satellite buoys in Pearl and Hermes Atoll in the Northwestern Hawaiian Islands during a marine debris removal mission in 2018. Locations of the 6 nets were transmitted every four hours from 09-30-2018 until the buoys broke free or stopped transmitting due to technical reasons. Last known stationary locations were surveyed on a return mission in September of 2021, and 4 of the 6 nets were relocated.

Tracking net movement and stationary times will help the marine debris program be more efficient in the future when removing derelict fishing nets from the NWHI.

This pilot study is part of a larger effort to test methodologies that could increase the debris removal program's efficiency and help quantify impacts to reefs.

McCoy KS, Morioka J, Huntington B, Kindinger TL, O'brien K. Movement and retention of derelict fishing nets in Northwestern Hawaiian Island reefs. DRAFT.

The Papahanaumokuakea Marine National Monument (PMNM) includes the 1200 nautical mile chain of atolls and islets known as the Northwestern Hawaiian Islands (NWHI) that are geographically positioned as a repository for marine debris. Marine debris circulates within the North Pacific Subtropical Gyre until it encounters the atolls of the NWHI.

The Ecosystem Sciences Division (ESD) at the NOAA Pacific Islands Fisheries Science Center (PIFSC) has conducted both ship- and shore-based missions in the NWHI to survey for and remove derelict fishing gear and many other types of marine debris. Exploratory and opportunistic efforts began in 1996 that eventually evolved into annual dedicated cruises deployed up to 4 months at a time with a team of up to 18 divers.

These marine debris missions have been supported by several agencies over the years, including PMNM, NOAA Marine Debris Program (MDP), NOAA Damage Assessment Remediation and Restoration Program (DARRP), and the NOAA Coral Reef Conservation Program (CRCP). ESD has removed derelict fishing gear and other marine debris from Pearl and Hermes Atoll (PHR), Midway Atoll (MID), Kure Atoll (KUR), Lisianski Island (LIS), Laysan Island (LAY), Maro Reef (MAR), and French Frigate Shoals (FFS).

Dataset is updated when new data is obtained.

This dataset contains buoy ID numbers, coordinates, time, and date information.

While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

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NOAA Ecosystem Science Division (ESD) Data Sharing Recommendations, version 9.0 updated August 12, 2015:

ESD welcomes the opportunity to collaborate on research issues contributing to the scientific basis for better management of marine ecosystems. ESD has a very diverse set of field activities that generates large volumes of data using an array of data collection protocols.

The following recommendations are for your consideration as you use this data:

1) Data analyses should take all field exigencies into account. The most effective way to do this would be active collaboration with ESD principal investigators.

2) In all presentations, product releases, or publications using data generated by ESD, proper acknowledgement of both ESD and the individuals responsible for data collection is expected. Citing the DOI (if available) is preferred, a non-DOI example is listed below.

3) If you collect or generate data for the same study areas, ESD requests that you share relevant information on complimentary data collections.

4) Those receiving data are strongly urged to inform the ESD Data Management Team of any errors and discrepancies that are discovered during the course of using these data. They are further urged to bring to the attention of the Team all problems and difficulties encountered in using these data. This information is necessary in order to improve the collections and to facilitate more efficient and economical data processing and retrieval. The users are asked to supply copies of any missing data that may be located, and to provide information as to significant subsets and special aggregations of data that are developed in using the material provided.

Example citation:

"This publication makes use of data products provided by the Ecosystem Science Division (ESD), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), with funding support from the NOAA Ocean Acidification Program (OAP). The analysis and interpretations presented here are solely that of the current authors.”

Data can be accessed online via the NOAA National Centers for Environmental Information (NCEI) Ocean Archive.

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Please cite NOAA Fisheries, Ecosystem Science Division (ESD) when using the data.

Example:

Ecosystem Science Division; Pacific Islands Fisheries Science Center (2020). Satellite Tagged Net Locations NWHI 2018 - 2020. NOAA's National Center for Environmental Information, https://www.fisheries.noaa.gov/inport/item/63206

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Data accessed using SatLink sofware: ELB3010 Manager, downloaded as a csv file, data manipulated in R version 3.6.1

Location accuracy dependent on software: Satlink ELB3010 ILL

3 of the 6 buoy tags stopped transmitting prematurely. There are some time frames when data were not transmitted at the regular 4 hour interval.

Pretty good conceptual consistency except for holes in the location transmissions, which are due to unknown reasons.

Locations were mapped in ArcGIS 10.6.1 software to estimate accuracy

NOAA IRC and NOAA Fisheries ITS resources and assets.

Data were downloaded using ELB 3010 Manager software. Locations were imported into csv file, symbols in coordinates were replaced in excel, then the files were loaded into the software program R. In R, date and time were separated and formatted to have consistent formats, and coordinates were converted to decimal degrees. Several points of bogus transmissions were removed, and all files were combined into one (raw data is one file for each buoy for each month).