46 posts tagged with "Fisheries"

Climate and weather have profound effects on economies, the food security and livelihoods of communities throughout the Pacific Island region. These effects are particularly important for small-scale fisheries and occur, for example, through changes in sea surface temperature, primary productivity, ocean currents, rainfall patterns, and through cyclones. This variability has impacts over both short and long time scales. We differentiate climate predictions (the actual state of climate at a particular point in time) from climate projections (the average state of climate over long time scales). The ability to predict environmental conditions over the time scale of months to decades will assist governments and coastal communities to reduce the impacts of climatic variability and take advantage of opportunities. We explore the potential to make reliable climate predictions over time scales of six months to 10 years for use by policy makers, managers and communities. We also describe how climate predictions can be used to make decisions on short time scales that should be of direct benefit to sustainable management of small-scale fisheries, and to disaster risk reduction, in Small-Island Developing States in the Pacific.

This information note summarises how small-scale fisheries are identified in international instruments and academic literature and provides estimates of the proportions of total catch, landed value and subsidies that are generated and received by this sector. It provides specific suggestions, based on the findings reported in the paper, of how this socio-economically important sector could be distinguished in the context of subsidy rules in the World Trade Organization.

Inaccurate or incomplete diagnosis of the root causes of overfishing can lead to misguided and ineffective fisheries policies and programmes. The “Malthusian overfishing narrative” suggests that overfishing is driven by too many fishers chasing too few fish and that fishing effort grows proportionately to human population growth, requiring policy interventions that reduce fisher access, the number of fishers, or the human population. By neglecting other drivers of overfishing that may be more directly related to fishing pressure and provide more tangible policy levers for achieving fisheries sustainability, Malthusian overfishing relegates blame to regions of the world with high population growth rates, while consumers, corporations and political systems responsible for these other mediating drivers remain unexamined. While social–ecological systems literature has provided alternatives to the Malthusian paradigm, its focus on institutions and organized social units often fails to address fundamental issues of power and politics that have inhibited the design and implementation of effective fisheries policy. Here, we apply a political ecology lens to unpack Malthusian overfishing and, relying upon insights derived from the social sciences, reconstruct the narrative incorporating four exemplar mediating drivers: technology and innovation, resource demand and distribution, marginalization and equity, and governance and management. We argue that a more nuanced understanding of such factors will lead to effective and equitable fisheries policies and programmes, by identifying a suite of policy levers designed to address the root causes of overfishing in diverse contexts.

The development of fisheries in the oceans, and other human drivers such as climate warming, have led to changes in species abundance, assemblages, trophic interactions, and ultimately in the functioning of marine food webs. Here, using a trophodynamic approach and global databases of catches and life history traits of marine species, we tested the hypothesis that anthropogenic ecological impacts may have led to changes in the global parameters defining the transfers of biomass within the food web. First, we developed two indicators to assess such changes: the Time Cumulated Indicator (TCI) measuring the residence time of biomass within the food web, and the Efficiency Cumulated Indicator (ECI) quantifying the fraction of secondary production reaching the top of the trophic chain. Then, we assessed, at the large marine ecosystem scale, the worldwide change of these two indicators over the 1950–2010 time-periods. Global trends were identified and cluster analyses were used to characterize the variability of trends between ecosystems. Results showed that the most common pattern over the study period is a global decrease in TCI, while the ECI indicator tends to increase. Thus, changes in species assemblages would induce faster and apparently more efficient biomass transfers in marine food webs. Results also suggested that the main driver of change over that period had been the large increase in fishing pressure. The largest changes occurred in ecosystems where ‘fishing down the marine food web’ are most intensive.

Climate is a critical driver of aquatic ecosystems and fish populations, strongly influencing latitudinal, seasonal, and depth distribution and abundance of marine and inland fishes through survival, growth, reproduction, and interactions with habitat and other species (Perry et al. 2005; Pörtner et al. 2014; Lynch et al. 2016). Climate variability has been linked with fish production variability with high levels of confidence in both marine and freshwater systems (e.g., Mantua et al. 1997; Chavez et al. 2003; Lynch et al. 2015).

This article can also be viewed at Oceana Canada

New report reveals that the Canadian government is inadequately addressing one of the biggest threats to our oceans

Up to 10.3 million tonnes of sea life is unintentionally caught each year around the world, captured in nets, lines and other gear. Some of this is kept and sold, or released safely; but far too much is put back in the ocean, either dead or dying. In Canada, this includes endangered and threatened species like whales, turtles, sharks and fish. For example, an estimated 1,200 endangered loggerhead turtles are caught each year on pelagic longlines in the swordfish fishery.

Chapter in Reflections of Canada.

To mark the 150th anniversary of Canadian Confederation the Peter Wall Institute published Reflections of Canada: Illuminating Our Opportunities and Challenges at 150+ Years. This collection of essays brings together Canada’s leading writers, researchers, and public intellectuals to offer informed and pointed commentary on what Canada is and what it must become.

The contribution by women to fisheries economies globally continues to be overlooked, in part, because “fishing” is often narrowly defined as catching fish at sea, from a vessel, using specialized gears. Both men and women are involved in fisheries, but often in different roles and activities. Fisheries research, management, and policy have traditionally focused on direct, formal, and paid fishing activities—that are often dominated by men, ignoring those that are indirect, informal, and/or unpaid—where women are concentrated. This has led to a situation where men’s and women’s contributions to fisheries are not equally valued or even recognized and has resulted in women being largely excluded from fisheries decision-making processes. Here, we examine the contributions by women in the fisheries sector of five globally significant marine fishing countries—Mexico, Peru, Senegal, South Africa, and Vietnam. These countries each have strong links between livelihoods and marine capture fisheries, yet represent different geographic, socioeconomic, and governance contexts. Through a synthesis of existing data, case studies, and consultation with local experts, we found that the contribution by women to the fisheries of these five countries is substantial. However, this investigation also revealed major gaps in understanding of gender inequalities in the fisheries sector and the need for better gender-disaggregated data to inform fisheries policy.

The ultimate goal of this contribution is to formulate fish trade policy recommendations that can be deployed to help achieve the relevant Sustainable Development Goals of the United Nations (SDGs). Even though all the 17 SDGs are relevant to the issues addressed in this contribution, I will focus on SDG14: Life under the water, and also SDG 1: (No poverty); 2: (Zero hunger); 3: (Gender equality); 4: (Reduced inequality); and 12: (Responsible consumption and production). Before I get to the recommendations, I will review the literature on the relationship between fish trade and sustainable fisheries; and discuss the potential promise (pros) and perils (costs) of fish trade. Policy recommendations for using fish trade to support the SDGs are provided under different headings that capture the main concerns highlighted in the literature when it comes to ensuring the sustainability of fisheries in general and those related to the impact of trade on fisheries sustainability in particular. The policy measures presented in this chapter have the potential to help ensure that trade in fish and fish products would support the implementation of the SDGs.

Photosynthesis fuels marine food webs, yet differences in fish catch across globally distributed marine ecosystems far exceed differences in net primary production (NPP). We consider the hypothesis that ecosystem-level variations in pelagic and benthic energy flows from phytoplankton to fish, trophic transfer efficiencies, and fishing effort can quantitatively reconcile this contrast in an energetically consistent manner. To test this hypothesis, we enlist global fish catch data that include previously neglected contributions from small-scale fisheries, a synthesis of global fishing effort, and plankton food web energy flux estimates from a prototype high-resolution global earth system model (ESM). After removing a small number of lightly fished ecosystems, stark interregional differences in fish catch per unit area can be explained (r = 0.79) with an energy-based model that (i) considers dynamic interregional differences in benthic and pelagic energy pathways connecting phytoplankton and fish, (ii) depresses trophic transfer efficiencies in the tropics and, less critically, (iii) associates elevated trophic transfer efficiencies with benthic-predominant systems. Model catch estimates are generally within a factor of 2 of values spanning two orders of magnitude. Climate change projections show that the same macroecological patterns explaining dramatic regional catch differences in the contemporary ocean amplify catch trends, producing changes that may exceed 50% in some regions by the end of the 21st century under high-emissions scenarios. Models failing to resolve these trophodynamic patterns may significantly underestimate regional fisheries catch trends and hinder adaptation to climate change.