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About
ISSF
Our Story
About Us
Strategic Plan
Annual Report
Media Coverage
Who We Are
Our Team
Board of Directors
Stakeholders
Scientific Advisory Committee
Environmental Stakeholder Committee
Participating Companies
Governance
Connect With Us
Sign up for the eNewsletter
Join ISSA
Donate
Contact Us
What We Publish
ISSF Documents
Scientific Reports
Best Practices Reports
Infographics
Blogs
Press Releases
eNewsletters
Videos
Web Features
Annual Report
Compliance Report
Social Media
Fishery Goals
& Resources
Our Priorities
Tuna Conservation
FAD Management
Marine Ecosystem Health
Bycatch Reduction
Capacity Management
Illegal Fishing Prevention
The Marine Stewardship Council Standard
MSC Fishery Certification
MSC-Certified Tuna Fisheries
MSC & FIP Resources Finder
MSC & FIP Support Form
Fishery Improvement Projects (FIPs)
About Tuna FIPs
List of Tuna FIPs
ISSF FIP Resources
MSC & FIP Resources Finder
FIPs FAQs
MSC & FIP Support Form
Skippers Workshops & Guidebooks
Skipper Program Overview
Workshop Topics
Workshop Options
Skippers Resources & Certification
Skippers & Observers Guidebooks
Our Best Practices Resources
Best Practices Reports
Jelly-FAD Construction Guide
Non-Entangling & Biodegradable FADs Guide
Vessel & Company
Commitments
Conservation Measures
Our Role
Conservation Measures
Report a Compliance Issue
Participating Companies & Compliance
Participating Companies
Audit Process
Compliance Report
Participating Company Audit Reports
Data Check Companies
PROACTIVE VESSEL REGISTER (PVR)
PVR Overview
PVR List
Apply to the PVR
PVR Auditing Process
PVR FAQs
Terms of PVR Participation
Vessels in Other Sustainability Initiatives (VOSI)
VOSI Overview
VOSI Tool
Apply to the VOSI
VOSI Auditing Process
Other Vessel Lists
Public Vessel List Overview
Record of Large-Scale Purse Seine Vessels
Tuna Vessel IMOs and Other UVI Numbers
Research, Advocacy,
& Recommendations
OUR SCIENTIFIC PROGRAM
Research Overview
Peer-Reviewed Articles
Scientific Reports
Best Practices Reports
Tuna RFMO Papers
OUR ADVOCACY EFFORTS
Advocacy Overview
Participating Company Advocacy
Position Statements
RFMO Best Practices Snapshots
Tuna Stocks &
Management
Tuna Fishing
Tuna Species
Fishing Methods
ISSF Glossary
Our Tuna Stock Tools
Status of the Stocks Report
Interactive Stock Status and Catch Tool
Fisheries Management
Regional Fisheries Management Organizations (RFMOs)
RFMO Best Practices Snapshots
Our Media Library
Infographics
Photos
Videos
Home
Dr. Jefferson Murua
Dr. Jefferson Murua’s Post Archive
Guides & Best Practices
Manta Ray Sorting Grid Construction Instructions for Purse-Seine Vessels (Traditional Chinese)
January 22, 2026 | Dr. Melissa Cronin, Dr. Jefferson Murua, Dr. Gala Moreno
Guides & Best Practices
Manta Ray Sorting Grid Construction Instructions for Purse-Seine Vessels (Vietnamese)
January 22, 2026 | Dr. Melissa Cronin, Dr. Jefferson Murua, Dr. Gala Moreno
Guides & Best Practices
Manta Ray Sorting Grid Construction Instructions for Purse-Seine Vessels (Tagalog)
January 22, 2026 | Dr. Melissa Cronin, Dr. Jefferson Murua, Dr. Gala Moreno
Guides & Best Practices
Manta Ray Sorting Grid Construction Instructions for Purse-Seine Vessels (Spanish)
January 22, 2026 | Dr. Melissa Cronin, Dr. Jefferson Murua, Dr. Gala Moreno
Guides & Best Practices
Manta Ray Sorting Grid Construction Instructions for Purse-Seine Vessels (Korean)
January 22, 2026 | Dr. Melissa Cronin, Dr. Jefferson Murua, Dr. Gala Moreno
Guides & Best Practices
Manta Ray Sorting Grid Construction Instructions for Purse-Seine Vessels (Japanese)
January 22, 2026 | Dr. Melissa Cronin, Dr. Jefferson Murua, Dr. Gala Moreno
Guides & Best Practices
Manta Ray Sorting Grid Construction Instructions for Purse-Seine Vessels (Indonesian)
January 22, 2026 | Dr. Melissa Cronin, Dr. Jefferson Murua, Dr. Gala Moreno
Guides & Best Practices
Manta Ray Sorting Grid Construction Instructions for Purse-Seine Vessels (French)
January 22, 2026 | Dr. Melissa Cronin, Dr. Jefferson Murua, Dr. Gala Moreno
Bycatch
Manta Ray Sorting Grid Construction Instructions for Purse-Seine Vessels (Simplified Chinese)
January 22, 2026 | Dr. Melissa Cronin, Dr. Jefferson Murua, Dr. Gala Moreno
Guides & Best Practices
Shark Release Ramp Guide for Purse-Seine Vessels (Traditional Chinese)
January 22, 2026 | Dr. Gala Moreno, Dr. Hilario Murua, Dr. Jefferson Murua
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