Co-management Arrangements Research Articles

Fisheries Co-management and Conflict Management in Inland Openwater Fisheries in Bangladesh

Abstract Community based management of inland openwater fisheries in Bangladesh has introduced and practiced through the Community Based Fisheries Management (cbfm) approach with partnership arrangement of government and non-government organisations, fisher communities and other stakeholders. One of the principles behind the community based fisheries management is to improve fisheries conflict management and its resolution. The implementation of the cbfm approach has experienced a significant contribution towards fishers’ conflict management. cbfm arrangement introduced fisher led, community led and women led approaches. Community based organisations (cbo s) as local institutions have been established through community participation under cbfm approach to mitigate conflict and its reducing and resolution. This paper assesses the impact of cbfm approaches on fishers’ conflict management in inland openwater fisheries in Bangladesh. It identifies the nature and causes of conflicts and develops ways of communicating good practice and reducing conflicts through fisheries co-management arrangement. This study might have policy implication to scale up cbfm approaches to promote fishers’ conflict resolution and its affective management of inland open water fisheries with a long- term commitment.

A Systemic Review & Meta-Analysis of the Impact of Vascular-Geriatric Service Models on Short-Term Outcomes in Vascular Surgery Inpatients

Abstract Background Vascular surgeons are treating progressively older, frailer and more medically complex patients. Care models including both surgeons and geriatricians have improved peri-operative outcomes in orthopaedics and surgical oncology. This meta-analysis investigates the impact of “vascular-geriatric” services on short-term inpatient outcomes. Methods Search strategy included PubMed, Scopus and Embase databases, conference abstracts and clinical trial registries. All study methodologies comparing outcomes before and after the introduction of a dedicated vascular-geriatrics service were eligible. Meta-analyses compared the relative risk (RR) of mortality, complications and 30-day readmission using a random-effects model. Risk of bias was assessed with the MINORS tool. Results Eight studies were identified, including one randomised trial and seven ‘before & after’ observational studies. 2074 patients were included, 1065 in the “Vascular-Geriatrics” cohort and 1009 in standard care. Care models included comprehensive geriatric assessment as part of the pre-operative review process before elective aortic surgery, inpatient geriatric liaison services and formal vascular-geriatric co-management arrangements. Source studies were of moderate to high risk of bias. A meta-analysis of five studies demonstrated vascular-geriatrics models were significantly associated with lower mortality rates than standard care (pooled 2.4% vs 4.9%) (RR 0.51, 95% CI 0.28-0.94, p=.03) (I2=0%). Vascular-Geriatrics models were also significantly associated with lower risk of infective complications (RR 0.49, 95% CI 0.36–0.66, p<.001) (I2=0%) and delirium (RR 0.58, 95% CI 0.35–0.97, p=.04) (I2=48%). There was no difference in mean length of stay (SMD -2.20, 95% CI -4.6-0.19, p=.07) (I2=86%). or 30-day readmission rates between Vascular-Geriatrics models and standard care (RR 1.10, 95% CI 0.81-1.51, p=.54) (I2=38%). Conclusion While the source data is heterogenous and of limited quality, this meta-analysis suggests that dedicated geriatric intervention may reduce adverse peri-operative outcomes in vascular patients compared to traditional care models. Further studies are needed to investigate the most effective design of geriatrician-surgeon partnership.

Indigenous Peoples as resources and resource makers in Peruvian Amazonia

ABSTRACT Environmentalist organizations promote co-management arrangements as a means of protecting forests and moving away from predatory forms of Indigenous-settler interactions. In Peru, the state and Indigenous Peoples co-manage territories under three regimes: Native Communities, Communal Reserves, and Reserves for Isolated Indigenous Peoples. Through the case of the Purús-Manu Conservation Corridor, we show how in co-management arrangements Indigenous Peoples play dual roles as resource managers (and makers) and as resources themselves, and how in this process indigeneity emerges as a resource. As a result, Indigenous Peoples find that paradoxically, co-management schemes reproduce many of the power asymmetries of previous interventions.

Co-management as an Ethical Space of Engagement: Prospects for Reconciliation in Vuntut National Park

Parks Canada’s commitments to reconciliation marks a significant shift in the governing paradigm of national parks, moving away from a colonial framework towards models that respect and elevate Indigenous forms of governance and knowledge systems. However, the extent to which a land claims–based co-management model, as the dominant mechanism of governance and engagement employed by Parks Canada, can serve as a vehicle for reconciliation is an open question. This paper endeavours to better understand the relational dynamics of co-management for their potential to advance reconciliation in national park settings. Using the lens of ethical space, we identify factors that either facilitate or impede relationship building between Vuntut Gwitchin First Nation and Parks Canada in the co-management of Vuntut National Park. Insights from semi-structured interviews conducted in 2021 with 11 community members and park managers indicate that an evolving-management relationship is sustained through extensive community engagement and Parks Canada’s support for strengthening community connections to the land. By adopting an ethical space framework for analysis, we were able to highlight different conditions and elements necessary for a protected-area co-management arrangement to serve as a solid foundation for reconciliation. Our analysis also revealed various structural impediments to the establishment of an ethical space conducive to reconciliation, particularly in the context of co-management arrangements based on land-claims agreements. These challenges included: discrepancies in approaches to protected-area management between Vuntut Gwitchin First Nation and Parks Canada, further complicated by the governance system employed by Parks Canada; issues of scale related to Parks Canada’s nested management structure, which affected relationship building between co-managers; financial constraints; and capacity constraints.

Critical areas for sea turtles in Northeast Brazil: a participatory approach for a data-poor context.

Fishing is one of the main threats to sea turtles due to the risk of entanglement in lost nets, vessel collision and mortality due to incidental catches. In Brazil, most of the studies regarding fishing interactions with sea turtles are focused on pelagic longline fisheries in the South and Southeast regions. However, their main reproductive areas in Southwest Atlantic RMU occur in Northeast Brazil, which overlaps small-scale coastal gillnet fisheries. Here, we aimed to use ethnobiology and participatory approaches as simple and cost-effective methods to identify areas for sea turtle conservation where impacts from small-scale fisheries are most likely. Expert captains were trained to recording sea turtle sightings during navigations from the landing port to the fishing grounds, informing their folk nomenclatures. By interpolation of environmental data (chlorophyll and bathymetry) and ecological data, we predicted habitats of 3,459.96 km² for Caretta caretta, Chelonia mydas, and Eretmochelys imbricata and fishing zones of 1,087 km² for management in 20 m and 50 m depths. Our results contributes to ongoing discussions of bycatch mitigation for sea turtle species and identification of habitats. We highlights the importance of considering particularities of overlapped areas in marine spatial planning and co-management arrangements.

Legal pluralism, ideology, and institutional change: the evolution of institutions for coastal resource governance in Ghana

Abstract Co-management regimes are institutional innovations that hold the promise of achieving sustainable common-pool resource governance. However, the transition to such institutional regimes in coastal resource systems has faced challenges in many countries. This article examines the processes and outcomes of such institutional changes in coastal fisheries in Ghana, where the transition to co-management was unsuccessful. Combining theoretical perspectives from legal pluralism in legal anthropology and ideational theories of institutional change within institutional economics, the paper uses process tracing to examine the role of ideology and historical institutional dynamics of the resource context in the institutionalization and failure of co-management arrangements for governing coastal fisheries. The study finds that ideological conflicts and historical legacies of legal pluralism hindered the practice and outcomes of coastal fisheries co-management in Ghana. The article argues for particular attention to the historical institutional dimensions and underlying worldviews of the resource context in institutional interventions for sustainability in coastal resource systems.

Decision making processes and power dynamics in timber production co-management: A comparative analysis of seven Brazilian Amazonian community-based projects

Power asymmetries are a major obstacle to inclusive and robust decision making in collaborative management (or co-management), whereby multiple actors, principally government and local communities, jointly make decisions to achieve natural resource management goals. We compared seven community-based timber projects under different co-management arrangements within three Brazilian Amazonian extractive reserves to illuminate how decision making was organized (structure) and how it actually operated (function) with respect to power dynamics among multiple actors. Over a 15-month field season, we conducted participant observation and 52 semistructured interviews, systematically analyzed over 30 key timber management decision-making meetings, and employed Q-methodology to ascertain diverse actor perspectives of power dynamics. Our overall analysis revealed that decisions across all seven timber projects were gradually made through multiple meetings at community, extractive reserve, and beyond extractive reserve levels – a positive approach that can lead to continuous problem-solving. The 16 Q-sorters perceived decision making in these meetings to be participative, respectful of all actors' rights to speak, and allowed for some knowledge exchange, suggesting that unequal power dynamics (as observed in our study) does not necessarily prevent the opportunity to voice one's opinion. This participation also decentralized decision-making processes, boosting chances that community-level actors used their crucial local knowledge and advocated for their interests. Still, in one reserve, community members were ill prepared to make informed decisions, lacking sufficient technical training and trusted long-term support from non-governmental external actors. Furthermore, some Q-sorters noted insufficient community-level actors in decision-making processes, because deliberative spaces were beyond their physical reach. Yet in two reserves, innovative logistical strategies were developed to compensate and accommodate this challenge. In the third reserve, however, in the absence of intentional and creative solutions to geographical and cultural distances, there were limited interactions among the communities and external actors, giving rise to minimal information flow and weakened representation of community interests in decision making. We also demonstrated that actors in power (government forest administration officers) or those with perceived power (financial or forest technical providers, community leaders), sometimes acted strategically over other actors, particularly those perceived as without power (community residents), to alter their behavior, constrain their choices, and influence their expectations regarding decision outcomes. We conclude that power asymmetries can be overcome in natural resource co-management decision making, using deliberate, thoughtful, and creative participatory approaches.

Disparities in the impacts of co-management on fishers’ livelihoods

AbstractNatural resources are widely managed through collaborative governance arrangements (e.g., co-management) which often result in the uneven distribution of costs and benefits among fishers. Discrepancies in how a fisher is impacted by co-management relative to other fishers or others in the community (i.e., disparity) can negatively affect fishers’ wellbeing, their support for management, and subsequently, ecological outcomes. Yet, disparities in the distribution of social impacts from co-management have rarely been assessed. We address this gap by examining disparities (losses and gains) in perceived livelihood impacts from co-management. Losses (or gains) occur when a fisher experiences a more negative (or positive) impact on their livelihood relative to other fishers or others in the community. We used data from interviews with 1191 fishers associated with 48 coral reef co-management arrangements across Kenya, Tanzania, Madagascar, Indonesia, and Papua New Guinea to examine how socioeconomic and institutional characteristics were associated with losses and gains from co-management. Overall, we found that more fishers perceived equality than disparities in the distribution of co-management impacts. Of those that perceived disparities, more fishers perceived losses than gains. We also found that disparities could be predicted by a range of socioeconomic characteristics, including distance to markets and wealth, and institutional characteristics of the co-management regime, such as gear, access, and area restrictions. This study provides insights on potential entry points that could be used by managers and policy-makers to promote equitable co-management of small-scale fisheries, such as the reduction of losses by increasing participation in decision-making processes, fostering conflict resolution mechanisms, prioritizing gear restrictions over area restrictions, and reducing poverty.

The Framework Analysis of Small and Medium Fishery Industries in West Papua Province, Indonesia

West Papua's fishery resources are in fishery management areas 715 and 717 with a potential of 1,242,526 tonnes/ha and 1,054,695 tonnes/ha respectively. On average, most fishery products are marketed fresh and only 1.20% are in the form of further processing. Therefore, the analysis of small and medium fisheries industries’ (SMFI) development framework is needed to encourage small and medium fisheries enterprises to grow and be sustainable. The analytical framework is realized by considering the initial data consisting of household capacity of fishermen, product superiority, and maximum sustainable yield; data management and processing; support from legal policy; community-based institutions; and co-management arrangements.

Integration or separation? The future of the English small-scale coastal fishery

The decline of inshore or small-scale coastal fisheries (SSCF) in many countries across the world has been well-documented in major studies published during the last 10 years. Researchers report decreasing stocks of marketable fish, inadequate fish quota allocations, and virtual exclusion from fisheries management decision-making bodies. The situation in England is a case in point, where many SSCF are subject to these pressures to the point that their livelihoods are threatened. A recent initiative sponsored by an industry agency to safeguard the position of the inshore sector aims to protect SSCF in England from decline and possible extinction by integrating it into the mainstream fishing industry and ensuring its representation on a proposed co-management body which would share decision-making between industry and government. However, drawing on the literature, archival documents, newspaper articles, and personal communications, we conclude that integrating all parts of the fleet together and setting up shared co-management arrangements is not a guarantee of SSCF survival because integration would tie SSCF down to the agenda of the large-scale fisheries (LSF) sector with no certainty that the special needs of SSCF would be met if they conflicted with the interests of LSF. Instead, our findings lead us to recommend forging a separatist path for SSCF, recognising its distinctive identity as an inshore fishery closely connected with coastal communities. We propose, therefore, two independent fisheries each with its own mode of management: SSCF governed by a regime of community quotas and exclusive spatial access to inshore waters; and LSF governed by a regime of individual transferable quotas (ITQs).

Long-term drivers of catch variability in south-eastern Australia’s largest portunid fishery

Portunid crab fisheries are socially and economically valuable yet are characterised by high inter-annual variability. Competing hypotheses about factors contributing to this variability concern the environment, climate, and fisher behaviour. Here, we investigate variability in commercial catch, through a case study of the most heavily exploited estuary in southeastern Australia (Wallis Lake). Four main hypotheses were identified based on the broader portunid published literature: 1) Freshwater flow may cause poor recruitment due to increased offshore spawning and unfavourable dispersal of larvae, 2) Winter and spring harvesting may impact the following summer harvest by removing the spawning stock biomass (recruit overfishing); 3) Environmental factors including sea surface temperature and onshore winds may influence supply-side processes and recruitment success, contributing to catch fluctuations; and 4) Climatic indices such as the Inter Pacific Oscillation and Pacific Decadal Oscillation (PDO) may correlate with longer-term fluctuations in the fishery. We find evidence in support of hypotheses 2 and 4, with winter harvest negatively impacting the following January - April harvest and the PDO being positively correlated with January - April catch rates. Harvesting in June – November disproportionally impacts large females, and it may be possible to incorporate controls on winter fishing effort through co-management arrangements to achieve the best economic, environmental and social outcomes from the fishery. Such controls may lead to improved summer catch rates by protecting unspawned eggs during the winter months. The hypotheses explored here may provide insight in the variability observed in portunid fisheries around the world.

Processo de descaracterização da Atenção Primária à Saúde durante a Pandemia no SUS, Campinas-SP, Brasil

Abstract This article examines supply of Primary Health Care in the city of Campinas (São Paulo state) during the COVID-19 pandemic, taking changes in the work process as its guide. This descriptive, qualitative study included participant observation and in-depth interviews of workers and users at four PHC facilities, from June 2021 to January 2022. The analyses found significant differences between the first and second years of the pandemic. At first, care strategies were disorganised and care for COVID-19 cases, limited. In the second year, home visits and routine care were resumed. This, added to the worsening social and public health context and new demands, such as vaccination, caused overwork and strained relations between health personnel and users. Also, collective and co-management arrangements were found to weaken, both at the municipal management level and at staff meetings and for social participation. In the post-pandemic context, Primary Health Care is challenged to restore these arrangements and care for health workers exhausted by the pandemic.

Ten years of Inuit co-management: advancing research, resilience, and capacity in Nunatsiavut through fishery governance

Community-based approaches have risen to prominence in fisheries governance as decision makers have recognized the importance of local perspectives, and Indigenous Peoples have pursued their right to self-determination. In Canada, some Indigenous Peoples have pursued a formalized approach to co-management through land claim agreements. The Torngat Joint Fisheries Board (TJFB) is one such co-management arrangement that focuses on fisheries management in Nunatsiavut, a land claim area in northern Labrador, Canada. This research examines how the TJFB’s work contributes to fisheries governance in the region, and subsequently, how co-management is placed in terms of supporting greater self-determination for Indigenous peoples in resource governance. To understand the TJFB’s role, this research examined 12 years of recorded meeting minutes from 2010 to 2021, highlighting the activities in which the TJFB engages, and how those activities have changed over time. Inductive content analysis was used to understand the activities undertaken by the TJFB, highlighting their actions as well as the strengths and weaknesses of the co-management board in practice. The analysis found that the TJFB plays important roles in research, drafting recommendations, and public education, and that their activities support greater participation from fisheries stakeholders. Land claim–based co-management has a significant impact on how Indigenous sovereignty operates and how it will evolve into the future. The TJFB’s efforts to increase research capacity in the region, push focus towards the socio-cultural dimensions of fisheries management, and strengthen the political voice of the region represent an important move toward self-determination in Nunatsiavut’s commercial fisheries.

Ecotourism anywhere? The lure of ecotourism and the need to scrutinize the potential competitiveness of ecotourism developments

This study critiques attempts to develop ecotourism operations at sites with low ecotourism potential. It draws on 34 interviews from five mangrove forests in the Philippines that were developed for ecotourism under various co-management arrangements involving private entrepreneurs, local government, and community participation and empowerment. These stakeholders were initially lured by a vision of the economic, social, and environmental benefits that ecotourism can deliver. However, most sites were located far from major cities and tourism hubs, with limited infrastructure, and unable to outcompete other attractions such as beaches. Financial and business challenges ensued, including low tourist numbers and insufficient revenues to cover operational and maintenance costs. Subsequently, some ecoparks experienced mismanagement, embezzlement, and the psychological and political disempowerment of local communities. The study cautions that despite ecotourism's allure, stakeholders could have much to lose from pursuing the ecotourism vision and failing to realise it.

Examining Social Equity in the Co-Management of Terrestrial Protected Areas: Perceived Fairness of Local Communities in Giant Panda National Park, China

Social equity is imperative both morally and instrumentally in the governance of protected areas, as neglecting this consideration can result in feelings of injustice and thus jeopardize conservation objectives. Despite the progressive attention paid to conservation equity, few have linked it with co-management arrangements, especially in the context of terrestrial protected areas. This study assesses the fairness perceptions in China’s Giant Panda National Park from recognitional, procedural, and distributional dimensions, to further disclose their correlations with individuals’ characteristics and participation in co-management activities. The regression analysis shows that all co-management types (instruction, consultation, agreement, and cooperation) are significantly linked with certain directions of perceived social equity. One novel finding here is that alternative types of co-management activities are influencing social equity in different ways. In addition, our research discloses the effects of education across all equity categories, and location is merely significantly related to recognitional equity. These findings suggest more inclusive and empowered co-management endeavors to strive for more equitably managed protected areas. Crucial steps to advance this include extending participative channels, co-producing better compensation plans, strengthening locals’ conservation capabilities, etc. Herein, this study appeals to a greater focus on social equity issues in co-management regimes, and tailored actions should be taken to tackle specific local problems.

“Going out to get in”—Roles of forest conflicts in bottom‐linked environmental governance progressing toward socio‐political innovations

AbstractSocial innovation literature focuses commonly on roles of cooperation in addressing co‐evolution of civil society initiatives and state‐based governance toward sustainable solutions. However, roles of conflicts in driving social change are scarcely addressed in social innovation literature. We elaborated a concept of bottom‐linked environmental governance, which can take place either via collaboration, or by conflict, and which can progress toward socio‐political innovations. We show this progression by examining two longitudinal cases on forest controversies in Northern Finland. These are the cases of Inari and Muonio. They are characterized by dynamic processes of conflicts and collaboration between state‐based organizations (e.g., Finnish forestry enterprise of Metsähallitus), civil society actors (e.g., reindeer herders, nature‐based tourism entrepreneurs and environmental nongovernmental organizations). We conducted a qualitative deductive‐inductive content analysis on the study cases and uncovered a set of “going out to get in” strategies by civil society actors, emerging from frustration on state‐based participatory processes, and consisting of open disputes and pressure strategies outside the participatory processes to gain a seat and power at negotiation tables. Metsähallitus often responded by seeking to maintain its control over forest decisions. The interplay between these strategies led to continuous open disputes and finally to socio‐political innovations (e.g., comanagement arrangement). The findings lead us to discuss reasons for prolonged disputes, the question of whether sociopolitical innovations can benefit all, considerations on power relations, strategies, and counter responses, all being relevant more broadly, for both, social innovation research and decision‐making enabling socio‐political innovations.

Expanding narratives of governance constraints to improve coral reef conservation.

To understand and address the failures of reef governance, it is critical to understand the perceptions of diverse policy makers and practitioners about the challenges they face in achieving their goals. Examining the discourse of policy makers and practitioners can reveal the extent to which these perceptions capture the full spectrum of potential governance challenges, including those related to management, institutional structures and processes, the values and principles underpinning governance, and the social and environmental context. We conducted semistructured interviews with 110 policy makers and practitioners across multiple sectors, scales, and contexts in Barbados, St Kitts and Nevis, Belize, and Honduras. We used thematic qualitative analysis informed by theories of interactive governance and governability to examine the challenges perceived by governance actors. Perceived governance challenges were broadly consistent across countries, but differed by sector (V = 0.819, F6,60 = 1.502, p = 0.01) and by level (community compared with national) (V = 0.194, F1,10 = 2.178, = 0.026). Management inputs and outputs, challenges relating to the socioeconomic context, issues of leadership and power, and stakeholder engagement were commonly cited challenges (>75%). Few respondents discussed challenges relating to the ecological context, governance processes, or the values and principles underpinning governance. We argue that examining perceptions can inform efforts to improve governance and assess the appropriateness of particular management tools under context-specific governance constraints. Furthermore, expanding the narratives of governance challenges to encompass the subtle values and images underpinning governance, and the scale of the challenges faced, can help identify a wider set of opportunities for change.

Bowhead whales and whaling in the central and eastern Canadian Arctic, 1970-2021

The history of bowhead whaling and hunt management in the eastern and central Canadian Arctic is reviewed. Subsistence hunting of bowhead whales by Inuit resumed in the 1990s under co-management arrangements that were part of land-claims settlement agreements. Removals by whaling in both Canada and Greenland have been accounted for in IWC Scientific Committee assessments of the Eastern Canada–West Greenland (EC-WG) stock, but Canada, having withdrawn from IWC membership in 1982, has no legal obligation to consider IWC management advice. From 1994-2021 the total reported catch of bowheads in the central and eastern Canadian Arctic was 39 (not including struck-and-lost whales or whales that died from incidental entanglement in fishing gear). Sixteen different communities, most of which had a long history of bowhead whaling prior to the arrival of commercial whalers, took at least one bowhead over that 27-year period. More than half of the recent catches have been by the communities of Igloolik, Sanijarak, Naujaat and Coral Harbour, all in the Foxe Basin–Repulse Bay–northern Hudson Bay region where at least occasional hunting of bowheads by local people had persisted until well into the 1970s. Greenland’s reported landed catches totaled from 2009-2015, with no successful hunts reported since 2015. Well over a third of the whales landed by both countries combined have been mature females, the most valuable class in terms of potential for population increase. Several factors in addition to hunting and entanglement in fishing gear are likely affecting EC-WG bowheads, including increased exposure to killer whale predation (linked to the massive reduction in sea ice) and other changes in ecological conditions driven primarily by climate change (e.g. more industrial activity, more vessel traffic, more noise). Recent analyses suggest the EC-WG stock of bowheads has grown considerably since the end of commercial whaling, with best estimates of current abundance in the range of 6000-7000 individuals. Even though the population appears capable of sustaining present levels of removal and disturbance, it is important for monitoring efforts to continue in both Canada and Greenland, with regular Indigenous participation. Local observations and traditional knowledge can be valuable sources of information on animal health, behaviour and phenology.

Canadian and Russian Fisheries Management in the Arctic: Complexities, Commonalities and Contrasts

This article reviews and compares Canadian and Russian approaches to Arctic fisheries management through a three-part format. First, the complex array of laws and policies applicable to Arctic fisheries is described for each country. How Canada and Russia have addressed international fishery issues is also highlighted, including their participation in the 2018 Central Arctic Ocean Fisheries Agreement. Second, commonalities in fisheries governance approaches are summarized, including national commitments to implement precautionary and ecosystem approaches. Finally, contrasts in Arctic fisheries management are discussed. Major differences include the greater devolution of management responsibilities by Canada to Indigenous communities through land-claim agreements and co-management arrangements and Russia’s greater success in formalizing bilateral fisheries management arrangements with its neighbours.

A demographic model to support customary management of a culturally important waterfowl species

Scientific support invited by Indigenous peoples and local communities (IPLC) to assist with customary environmental management can improve conservation and community livelihoods. For example, demographic models can help to understand how alternative wildlife management strategies affect population dynamics and harvest sustainability. We developed a demographic model to assist Ngāi Tahu, the southern-most Māori tribe in Aotearoa/New Zealand, in customary management of a culturally important population of Black Swans (<em>kakī anau</em>, <em>Cygnus atratus</em>). We used recent demographic data, including results of an experimental egg harvest study, to inform <em>tangata tiaki</em> (Ngāi Tahu environmental guardians) about how customary egg harvest and background pressure from sport hunting of swans aged ≥ 1 year differentially affect population growth. We also assessed how sport hunting of swans affects the sustainability of customary egg harvest. Estimated population growth (1.018 or presently growing 1.8% annually; 95% CI: 0.808–1.241) was most sensitive to changes in adult and subadult survival, followed by juvenile (first-year) survival, breeding propensity, and nest hatching success. Uncertainty in population growth was almost entirely attributable to uncertainty in swan survival rates after hatching. Sustainable population-level rates of egg harvest varied from none to more than half of all eggs, depending on small changes in adult and subadult survival. Population sensitivity to adult and subadult survival suggests that limiting and monitoring their mortality are crucial to population and egg harvest sustainability, whereas contemporary government-mandated species management, through Fish and Game New Zealand, allows adult and subadult mortality from sport hunting, with little record of offtake. Recognizing the rights and interests of Ngāi Tahu, and monitoring swan mortality more closely, could improve Ngāi Tahu abilities to practice customary harvest, enhance population and environmental monitoring, and, when appropriate, control swan numbers in a culturally appropriate and less wasteful way. The model we present could aid decision making and communication between Ngāi Tahu and New Zealand’s Crown government within a potential future co-management arrangement. Demographic models can be useful tools for supporting customary environmental management, but developing, maintaining, and implementing these tools requires support for adaptive policies and management arrangements that recognize IPLC rights to the environment and decision making.