ICCAT Resolution on Dolphin Bycatch: A Comprehensive Overview (Updated 12/10/2025)
ICCAT’s consolidated resolution C-04-05_Rev2, concerning bycatch, is available as a PDF. Accessing this document is crucial for understanding ICCAT’s approach to dolphin conservation and reporting requirements.
ICCAT (International Commission for the Conservation of Atlantic Tunas) manages highly migratory species like tuna and swordfish in the Atlantic Ocean. Recognizing the impact of fishing practices, ICCAT addresses marine mammal bycatch, particularly dolphins and porpoises, through specific resolutions. The Consolidated Resolution C-04-05_Rev2, available as a PDF document, is central to these efforts.
This resolution outlines reporting protocols and mitigation measures. Understanding ICCAT’s framework, detailed within the PDF, is vital for stakeholders involved in Atlantic fisheries and dolphin conservation initiatives. The document provides a comprehensive overview of ICCAT’s commitment to minimizing incidental catches.
The Problem of Dolphin Bycatch in Tuna Fisheries
Dolphin bycatch in tuna fisheries, particularly with purse seine nets, poses a significant threat to cetacean populations in the Atlantic Ocean. Historical interactions, documented in research referenced alongside ICCAT Resolution C-04-05_Rev2 (available as a PDF), reveal substantial mortality rates. The resolution addresses this issue by mandating reporting of bycatch incidents.
Analyzing the PDF reveals that reported bycatch included 1,539 harbour porpoises and 1,211 dolphins in recent years. Reducing these numbers is a key objective of ICCAT, and the resolution outlines specific measures to achieve this goal.
Historical Context: Tuna-Porpoise Interactions & Early Research (1970s ⸺ 2000s)
From the 1970s, research – detailed in documents accessible alongside ICCAT Resolution C-04-05_Rev2 (in PDF format) – focused on the “tuna-porpoise problem,” specifically dolphin mortality linked to tuna fishing practices. Early NMFS studies investigated methods to reduce these interactions. This period saw growing awareness of the scale of bycatch and its impact on dolphin populations.
The PDF reveals that understanding these historical interactions was crucial in shaping ICCAT’s initial responses and ultimately led to the development of the current resolution and reporting protocols.
Understanding ICCAT Resolutions
ICCAT resolutions, like C-04-05_Rev2 (available as a PDF), guide fisheries management. They address critical issues, including marine mammal bycatch, and establish reporting standards.
What is an ICCAT Resolution?
ICCAT resolutions are legally binding decisions adopted by the Commission, establishing rules for cooperative international management of Atlantic tuna and other covered species. These aren’t merely recommendations; they mandate specific actions from member states.
The Consolidated Resolution C-04-05_Rev2, accessible as a PDF document on the ICCAT website, exemplifies this. It details requirements for reporting marine mammal bycatch, including dolphins and porpoises, and outlines measures to minimize their mortality. Understanding these resolutions, particularly through the PDF version, is vital for stakeholders.
The Role of Resolutions in Managing Fisheries
ICCAT resolutions are fundamental to sustainable fisheries management, ensuring long-term viability of fish stocks and minimizing ecological impact. They address critical issues like bycatch, specifically concerning vulnerable species like dolphins and harbour porpoises.
Resolution C-04-05_Rev2, available as a PDF, demonstrates this role by mandating reporting on marine mammal interactions. This PDF document details how member nations must monitor and mitigate dolphin mortality within tuna fisheries, promoting responsible fishing practices and data-driven conservation efforts.
Consolidated Resolution C-04-05_Rev2: A Key Document
ICCAT’s Consolidated Resolution C-04-05_Rev2, accessible in PDF format, is central to dolphin conservation efforts within the Atlantic tuna fishery. Paragraph 2 specifically focuses on reducing bycatch, demanding comprehensive reporting on marine mammal interactions.
This crucial PDF outlines obligations for member nations, detailing required data collection and mitigation strategies. It’s a cornerstone document for understanding ICCAT’s commitment to minimizing dolphin mortality and promoting sustainable fishing practices, ensuring the long-term health of marine ecosystems.

Detailed Analysis of Resolution C-04-05_Rev2
The ICCAT resolution’s PDF details bycatch reporting, reduction measures, and obligations for member nations to protect dolphins and porpoises effectively.
Paragraph 2: Focus on Bycatch Reduction
ICCAT Resolution C-04-05_Rev2, specifically paragraph 2, centers on minimizing marine mammal bycatch within tuna fisheries. The PDF document outlines requirements for members to implement measures aimed at reducing dolphin and porpoise mortality. This includes reporting bycatch incidents and adopting strategies to avoid encircling marine mammals during purse-seine fishing operations.
The resolution emphasizes the importance of data collection and analysis to better understand bycatch patterns and assess the effectiveness of mitigation techniques. It encourages the use of best practices and technological solutions to minimize interactions between fishing gear and vulnerable cetacean species, as detailed within the PDF.
Reporting Requirements for Marine Mammal Bycatch
The ICCAT Resolution C-04-05_Rev2, accessible as a PDF, mandates comprehensive bycatch reporting from member nations. Vessels are required to document all interactions with marine mammals, including dolphins and porpoises, detailing species, location, and estimated mortality. This data, outlined in the PDF, must be submitted to ICCAT regularly.
The resolution specifies reporting formats and timelines to ensure consistency and facilitate analysis. Accurate and timely reporting is crucial for monitoring bycatch levels, evaluating mitigation measures, and informing future conservation efforts, as detailed within the official ICCAT PDF document.
Specific Measures for Reducing Dolphin Mortality
ICCAT Resolution C-04-05_Rev2, available in PDF format, recommends avoiding encircling marine mammals during purse-seine fishing operations. While non-binding, the resolution encourages best practices to minimize dolphin interactions. The PDF details suggested techniques, including careful net deployment and monitoring for dolphin presence.
Furthermore, the document emphasizes the importance of observer programs and data collection to assess the effectiveness of mitigation strategies. ICCAT promotes technological solutions, though specifics are evolving, as outlined in the official PDF, aiming to reduce bycatch and protect vulnerable species.
Regional Implementations & Related Resolutions
ICCAT’s PDF resolution complements IOTC Resolution 13/04, prohibiting sets on dolphins, showcasing regional efforts to minimize bycatch and protect cetaceans.
IOTC Resolution 13/04: Prohibiting Sets on Dolphins
IOTC Resolution 13/04 directly addresses dolphin safety by prohibiting flagged vessels within IOTC areas from deploying purse-seine nets when dolphins are sighted before netting commences. This contrasts with ICCAT’s more advisory approach, detailed in its PDF resolution C-04-05_Rev2, focusing on reporting and mitigation.
While ICCAT emphasizes data collection and reduction strategies outlined in its official document, the IOTC resolution provides a firm prohibition. Both aim to reduce bycatch, but differ in enforcement style. Comparing the PDF documents reveals a spectrum of regional responses to cetacean conservation challenges.
Comparison of ICCAT and IOTC Approaches
Analyzing the ICCAT resolution (C-04-05_Rev2, available as a PDF) alongside IOTC Resolution 13/04 reveals differing strategies. ICCAT prioritizes reporting bycatch of marine mammals, including dolphins, and suggests mitigation measures, while the IOTC implements a direct prohibition on setting nets around sighted dolphins.
The ICCAT PDF emphasizes data-driven improvements, whereas the IOTC adopts a preventative stance. Both Regional Fisheries Management Organizations (RFMOs) address cetacean protection, but their approaches, as documented in their respective resolutions, demonstrate varied levels of regulatory stringency.
Habitats Directive Annex II: Bottlenose Dolphin & Harbour Porpoise
The European Union’s Habitats Directive, Annex II, lists both the bottlenose dolphin and harbour porpoise, highlighting their conservation importance. This designation complements ICCAT’s efforts, detailed in resolution C-04-05_Rev2 (accessible as a PDF), to minimize bycatch impacting these vulnerable species.
The Directive’s inclusion underscores the need for coordinated conservation strategies. While the ICCAT PDF focuses on fisheries management, the Habitats Directive provides broader legal protection within European waters, reinforcing the commitment to safeguarding these cetacean populations from threats like accidental capture.

Bycatch Mitigation Measures Recommended by ICCAT
ICCAT’s resolution, detailed in its PDF document, suggests purse seiners avoid encircling marine mammals, promoting responsible fishing practices to reduce dolphin bycatch.
Avoiding Encircling Marine Mammals
ICCAT Resolution C-04-05_Rev2, accessible as a PDF, strongly advises against encircling marine mammals during purse-seine fishing operations. This core tenet aims to minimize direct dolphin mortality and serious injury resulting from entanglement. The resolution emphasizes proactive measures, urging vessels to utilize observational techniques to detect dolphin presence before net deployment.

Specifically, the PDF details the importance of avoiding sets on dolphins, promoting responsible fishing practices. This preventative approach, outlined within the ICCAT document, is fundamental to the organization’s commitment to dolphin conservation within the Atlantic Ocean and related areas.
Technological Solutions for Bycatch Reduction
While ICCAT Resolution C-04-05_Rev2 (available as a PDF) primarily focuses on operational practices, it implicitly encourages the development and implementation of technological solutions to reduce dolphin bycatch. The document doesn’t detail specific technologies, but supports innovation aimed at minimizing interactions between fishing gear and marine mammals.
Potential solutions, informed by research referenced alongside the resolution PDF, include improved net designs and acoustic deterrent devices. Further exploration of these technologies, alongside robust monitoring, is vital for enhancing bycatch mitigation efforts and bolstering dolphin populations.
Observer Programs and Data Collection
ICCAT Resolution C-04-05_Rev2, accessible as a PDF document, heavily emphasizes comprehensive reporting of marine mammal bycatch incidents. This relies significantly on robust observer programs and diligent data collection practices by member nations. Accurate data is crucial for assessing the effectiveness of mitigation measures and identifying areas needing improvement.
The resolution mandates detailed reporting, requiring vessels to document dolphin interactions. This information, when compiled and analyzed, informs future ICCAT decisions and strengthens conservation strategies, as outlined within the PDF.
The Increase in RFMO Resolutions Addressing Bycatch
ICCAT’s resolution, detailed in its PDF, reflects a growing trend among Regional Fisheries Management Organizations (RFMOs) to prioritize bycatch reduction for vulnerable species.
Trends in Bycatch Reporting and Management
ICCAT’s resolution C-04-05_Rev2, accessible as a PDF document, signifies a notable shift towards enhanced bycatch reporting. The document mandates detailed reports on marine mammal interactions, including dolphin and porpoise bycatch. This increased scrutiny, alongside similar RFMO initiatives, demonstrates a growing commitment to data-driven fisheries management.
Historically, bycatch data was often incomplete. Now, ICCAT encourages comprehensive reporting, aiding in the assessment of population impacts. The PDF outlines specific requirements for vessels to document and report any incidental catch of cetaceans, fostering transparency and accountability within the fishing industry. This trend supports more effective conservation strategies;
Vulnerable Species and Increased Protection
The ICCAT resolution, detailed in its PDF format (C-04-05_Rev2), acknowledges the heightened vulnerability of specific cetacean species. Bottlenose dolphins and harbour porpoises, listed in Annex II of the Habitats Directive, receive particular attention within the resolution’s framework. Increased protection stems from documented bycatch levels – 1,539 harbour porpoises and 1,211 dolphins were reported previously.
The PDF emphasizes minimizing impacts on these vulnerable populations through stricter reporting and mitigation measures. This reflects a broader trend within Regional Fisheries Management Organizations (RFMOs) towards safeguarding endangered and threatened marine mammals from unsustainable bycatch.

Challenges in Implementing ICCAT Resolutions
The ICCAT resolution’s PDF reveals enforcement and data gaps hinder effective implementation. IUU fishing further complicates bycatch reduction efforts, demanding greater oversight.
Enforcement and Compliance Issues
ICCAT Resolution C-04-05_Rev2, detailed in its PDF format, faces significant enforcement hurdles. The document highlights challenges in ensuring all member nations consistently adhere to bycatch reporting protocols and mitigation measures. Compliance relies heavily on self-reporting, creating potential for underestimation of dolphin mortality.
Effective monitoring requires substantial resources and international cooperation, often lacking. The resolution’s success is compromised by illegal, unreported, and unregulated (IUU) fishing activities, which circumvent established rules. Strengthening port state controls and at-sea inspections, as outlined in the PDF, are vital for improved enforcement and demonstrable compliance.
Data Gaps and Monitoring Difficulties
The ICCAT Resolution C-04-05_Rev2, accessible as a PDF, acknowledges significant data deficiencies hindering accurate bycatch assessments. Comprehensive monitoring of dolphin populations and bycatch rates remains challenging due to limited observer coverage on vessels and inconsistent reporting standards. Identifying vulnerable species requires robust data, often unavailable.
The PDF reveals gaps in understanding the spatial and temporal distribution of dolphins relative to fishing effort. Improving data collection through enhanced observer programs and technological solutions, as suggested within the resolution, is crucial for effective conservation strategies.
The Impact of Illegal, Unreported, and Unregulated (IUU) Fishing
The ICCAT Resolution C-04-05_Rev2, detailed in its PDF format, explicitly addresses the detrimental impact of IUU fishing on dolphin conservation efforts. IUU activities circumvent bycatch reporting requirements, creating significant data gaps and undermining the resolution’s effectiveness. Lack of transparency hinders accurate assessments of dolphin mortality rates.
The PDF highlights that IUU vessels often operate without observer coverage, exacerbating monitoring difficulties. Combating IUU fishing is paramount to ensuring compliance with ICCAT regulations and protecting vulnerable dolphin populations.

Species Affected by Bycatch
The ICCAT resolution PDF details impacts on bottlenose dolphins and harbour porpoises, listed in Annex II of the Habitats Directive, facing significant bycatch risks.
Bottlenose Dolphin Populations
ICCAT’s resolution documentation, available in PDF format, highlights the vulnerability of bottlenose dolphin populations to bycatch within the Atlantic Ocean. The reports detail observed mortality rates and emphasize the need for stringent mitigation measures. Specifically, the resolution addresses the impact of purse seine fishing practices on these intelligent marine mammals.
The PDF outlines the importance of monitoring bottlenose dolphin distribution and abundance to assess the effectiveness of current conservation efforts. Furthermore, it stresses the necessity of collaborative research to better understand their behavior and minimize interactions with fishing gear, ultimately safeguarding these populations.
Harbour Porpoise Vulnerability
ICCAT resolution documents, accessible as PDFs, reveal significant concerns regarding harbour porpoise vulnerability to bycatch. Data within these reports indicate substantial annual bycatch numbers, reaching over 1,500 individuals in recent years. The resolution emphasizes the need for proactive measures to reduce mortality rates within ICCAT’s regulatory area.
The PDF details the species’ susceptibility due to their habitat overlap with key fishing zones. It underscores the importance of implementing and enforcing bycatch mitigation technologies and observer programs to accurately assess and address the ongoing threat to harbour porpoise populations.
Other Cetacean Species at Risk
ICCAT resolution PDFs highlight that while bottlenose dolphins and harbour porpoises receive focused attention, other cetacean species also face bycatch risks. The documents detail instances of incidental capture affecting various whale and dolphin populations within the ICCAT convention area.
These reports emphasize the need for broader monitoring efforts to comprehensively assess the impact on all cetacean species. The resolution encourages reporting on all marine mammal bycatch, promoting a more holistic understanding of the challenges and informing future conservation strategies detailed within the PDF documents.

The Future of ICCAT Resolutions on Dolphin Bycatch
ICCAT resolution PDFs suggest strengthening existing measures and fostering international collaboration for improved dolphin protection through enhanced data collection and research.
Potential for Strengthening Existing Measures
ICCAT’s current resolution, accessible in PDF format, provides a foundation, but enhancements are vital. Reviewing the document reveals opportunities to refine bycatch reporting protocols, demanding more granular data on species impacted. Strengthening enforcement mechanisms against IUU fishing, a significant contributor to dolphin mortality, is paramount.
Further, ICCAT could mandate the adoption of best available technologies for bycatch reduction, moving beyond non-binding suggestions. Increased observer program coverage, detailed in the resolution PDF, would improve data accuracy and accountability. Ultimately, a more proactive and legally binding approach is needed to safeguard dolphin populations.
The Role of International Collaboration
Examining the ICCAT resolution PDF highlights the need for broader international cooperation. Comparing ICCAT’s approach with that of organizations like the IOTC, detailed in related documents, reveals differing levels of stringency. Harmonizing standards across Regional Fisheries Management Organizations (RFMOs) is crucial for effective dolphin conservation.
Sharing best practices, data on bycatch incidents, and technological advancements – all documented within these PDFs – can significantly improve mitigation efforts. Collaborative research initiatives, involving scientists and stakeholders globally, are essential for understanding dolphin behavior and refining conservation strategies.
Research Needs and Future Directions
Analysis of the ICCAT resolution PDF reveals ongoing data gaps hindering effective bycatch reduction. Future research should focus on refining bycatch estimation methods and improving observer program coverage. Investigating the impact of IUU fishing, often undocumented, is also critical.
Further study is needed to assess the effectiveness of current mitigation measures and explore innovative technologies. Understanding dolphin population dynamics and vulnerability – information often referenced within the PDF – will inform adaptive management strategies and strengthen future ICCAT resolutions.

Accessing ICCAT Documents (PDF Format)
The official ICCAT resolution concerning dolphin bycatch, C-04-05_Rev2, is readily available as a downloadable PDF document on the ICCAT website.
Locating the Official Resolution PDF
Finding the official ICCAT resolution on dolphin bycatch (C-04-05_Rev2) in PDF format requires navigating the ICCAT website. Begin by visiting the official ICCAT site and utilizing their search function, specifically targeting “Resolution C-04-05_Rev2”. Alternatively, browse through the ‘Resolutions’ section, often categorized by year or subject matter.
Look for documents related to marine mammal protection or bycatch reduction. Direct links to PDFs are sometimes provided within meeting reports or conservation measures summaries. Ensure the document originates directly from ICCAT to guarantee authenticity and the most current version, updated as of 12/10/2025.
Understanding the Document Structure
ICCAT Resolution C-04-05_Rev2, in PDF format, is structured to detail bycatch management. Key sections include the preamble outlining conservation concerns, followed by operative paragraphs defining member obligations. Paragraph 2 specifically focuses on bycatch reduction measures.
Annexes often contain detailed reporting formats for marine mammal interactions, including dolphin bycatch data. Pay close attention to definitions of terms and specific requirements for vessel operators. Understanding this structure is vital for interpreting ICCAT’s expectations and ensuring compliance.
Key Sections to Review for Bycatch Information
When examining the ICCAT Resolution C-04-05_Rev2 PDF, prioritize sections detailing reporting requirements for marine mammal bycatch. Focus on paragraphs outlining specific measures to reduce dolphin mortality, as these detail operational guidelines.
Review any annexes providing standardized data collection forms. Pay attention to definitions of “bycatch” and “incidental catch” to ensure accurate interpretation. Understanding these key sections is crucial for comprehending ICCAT’s expectations regarding dolphin conservation efforts.
Resources and Further Information
ICCAT’s official website hosts the resolution PDF and related documents. Scientific publications and NGO reports offer further insights into dolphin bycatch issues.
ICCAT Official Website

ICCAT’s official website (iccat.int) serves as the primary source for accessing the complete text of Resolution C-04-05_Rev2 in PDF format. Navigating the site requires locating the ‘Resolutions’ section, often categorized by year or subject matter. Users can directly download the PDF to review detailed bycatch reporting requirements and conservation measures.
The website also provides access to related documents, including scientific reports informing the resolution and updates on implementation efforts. Regularly checking the ICCAT website ensures access to the most current version of the resolution and associated information regarding dolphin conservation.
Relevant Scientific Publications

Numerous scientific publications underpin ICCAT Resolution C-04-05_Rev2, detailing the impacts of bycatch on dolphin and porpoise populations. Research from the 1970s onward, focusing on tuna-porpoise interactions and mortality reduction, informs the resolution’s strategies. These studies, often cited within ICCAT documents, provide crucial context for understanding the scientific basis of bycatch mitigation measures.
Accessing these publications – through databases like Google Scholar – complements the PDF resolution, offering deeper insights into the complexities of marine mammal conservation within ICCAT’s purview.
NGOs Involved in Dolphin Conservation
Several non-governmental organizations (NGOs) actively monitor and advocate for improved ICCAT Resolution implementation regarding dolphin bycatch. These groups often analyze the PDF version of Resolution C-04-05_Rev2, assessing its effectiveness and pushing for stronger conservation measures. They play a vital role in raising awareness and holding fisheries accountable.
Their reports frequently complement ICCAT’s data, providing independent assessments of bycatch levels and the impact on vulnerable species, contributing to informed decision-making and improved protections.