El Niño Southern Oscillation (ENSO) effects on fisheries and aquaculture

Bertrand, Arnaud; Lengaigne, Matthieu; Takahashi, K.; Avadí, Ángel; Poulain, Florence; Harrod, Chris

doi:10.4060/ca8348en

Cited by 14 publications

(13 citation statements)

References 349 publications

(701 reference statements)

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“…Second, climate change affects the biological conditions of the ocean such as diseases, and changes in species distribution and species abundance. Third, it impacts the socioeconomic condition, such as disrupted fishing activities and reduced fishing productivity [5]. Grafton [6] claimed that climate change alters species, changing the distribution and mix of species that will have a rippled effect on marine and fisheries ecosystems.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Climate Change Adaptation Strategies on Income and Food Security: Empirical Evidence from Small-Scale Fishers in Indonesia

2021

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The impacts of climate change on marine capture fisheries have been observed in several studies. It is likely to have a substantial effect on fishers’ income and food security. This study aims to estimate the impact of adaptation strategies on fishers’ income and their household’s food security. Data were collected from small-scale fishers’ households, which own a fishing boat smaller or equal to five gross tonnages (GT). The study sites were the two coastal regions of Malang and Probolinggo in East Java, Indonesia, due to the meager socioeconomic resources caused by climate change. A probit regression model was used to determine the factors influencing the fishers’ adaptation. Propensity score matching (PSM) was applied to evaluate the impact of the adaptation strategies on income and food security. Food security was measured by food consumption score (FCS). The findings indicated that participation in the fishers’ group affected adaptation strategies significantly, and so did the access to credit and climate information. Also, PSM showed that the adaptation strategies had a positive and significant impact on fishers’ income and food security. Those who applied the adaptation strategies had a higher income and FCS than those who did not. This finding implies that the fishery sector’s adaptation strategies can have significant expansion outcome and reduce exposure to risks posed by climate change. Therefore, the arrangement of more climate change adaptation strategies should be promoted by the government for small-scale fishers in Indonesia.

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Section: Introductionmentioning

confidence: 99%

The Impact of Climate Change Adaptation Strategies on Income and Food Security: Empirical Evidence from Small-Scale Fishers in Indonesia

2021

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“…With regard to ENSO, South American sea lion populations from the Pacific ecosystem suffered significant population decline as a result of physical stress and starvation on females, juveniles, and pups during positive phases (Edwards, 2018;Oliveira, 2011;Oliveira et al, 2012). Along the southeastern coast of South America strong freshwater discharges, northerly wind anomalies, and upwelling during extreme El Niño events, generate an increase in the primary productivity along the continental shelf north of 45 S (Bertrand et al, 2020;Machado et al, 2013). In this sense, physical variations caused by ENSO are connected with weather in the rest of Southern Ocean, including the Southern Atlantic basin (Meredith et al, 2008;Stenseth et al, 2003;Trathan et al, 2003;White & Peterson, 1996).…”

Section: Discussionmentioning

confidence: 99%

“…However, our results did not indicate any ENSO effects on interannual variability of the width GLGs. Possibly, strong and positive events such as 1972-1973, 1982, and 1997-1998(Bertrand et al, 2020 could influence South American sea lion growth in Patagonia, while moderate events or even ENSO negative phases, have not influenced these populations. The latter could be due to a weak impact of environmental conditions on the food web during these events, which was mitigated by feeding strategies of South American sea lions.…”

Section: Discussionmentioning

confidence: 99%

Climate anomalies influence tooth growth patterns of South American sea lions

Heredia

Drouville

Srur

et al. 2021

Marine Mammal Science

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El Niño-Southern Oscillation (ENSO) and Southern Annular Mode (SAM) indirectly affect tooth growth of marine mammals, through changes in prey abundance, availability, and composition. This is reflected as variation in the dentine deposition, which determines the formation of annual layers, called growth layer groups (GLGs). The aim of this work was to study potential effects of ENSO and SAM on South American sea lion (Otaria byronia) of Patagonia, by examining interannual variability of GLG width. Adapting dendrochronological techniques, we analyzed 97 individuals (60 females and 37 males) and built six chronologies (three for each sex) by using cubic splines with different rigidity.Chronologies were correlated with MEI (Multivariate ENSO Index) and SAM index time series, considering lags in the biological response. The chronologies of females spanned 39 years and only two of these chronologies showed negative correlation with 1 year lagged SAM events. The chronologies of males spanned 23 years, but none showed significant correlation with these indexes. Our results did not indicate any ENSO effects on this species, while positive SAM events could reduce the abundance or availability of South American sea lion's prey, affecting the nutritional status of females and generating thinner GLGs during the next year.

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“…El Niño, or more precisely the El Niño-Southern Oscillation (ENSO), and La Niña are periods of extreme weather across South East Asia and Africa triggered by sudden shifts in the surface temperature of the South-Eastern Pacific Ocean. El Niño and La Niña both resulted in severe negative effects on aquaculture production (New et al 2001;Gomez-Uchida et al 2018;Bertrand et al 2020). Specific to Lake Maninjau, a report from MoPW (2013) described that rain and strong wind, typical for La Niña conditions, triggers mixing and MFK events in the lake.…”

Section: Action Situationmentioning

confidence: 99%

Challenges for the development of environmentally sustainable cage culture farming in Lake Maninjau, Indonesia: an institutional perspective

Yuniarti

Barnes

Glenk

et al. 2021

Ecosystems and People

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The environmental condition of Lake Maninjau, a complex tropical system in Indonesia, has been suffering from the proliferation of tilapia cage culture practices. The area around the lake is inhabited by the Minangese ethnic group, which has strong customary laws and clan system. Applying the Institutional Analysis and Development (IAD) framework and based on face-to-face semi-structured interviews, this paper aims to understand the challenges for the development of environmentally sustainable cage culture farming. Our institutional analysis reveals that the main challenges are low levels of trust between communities and officials, and conflicting formal and informal institutions which have prevented the emergence of strong rules-in-use. This is a particularly interesting theoretical contribution to the literature on the management of common pool resources (CPR), as our case study is an example of private property farming in a common pool resource (the lake), a dynamic which remains understudied in the CPR literature. We provide suggestions for local stakeholders as well as regional and national government related to the importance of seeking local legitimacy of the working rules to govern cage culture. The lessons learned from this case study might be useful for the governance of aquaculture in other lakes in Indonesia and countries of the Global South.

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El Niño Southern Oscillation (ENSO) effects on fisheries and aquaculture

Cited by 14 publications

References 349 publications

The Impact of Climate Change Adaptation Strategies on Income and Food Security: Empirical Evidence from Small-Scale Fishers in Indonesia

The Impact of Climate Change Adaptation Strategies on Income and Food Security: Empirical Evidence from Small-Scale Fishers in Indonesia

Climate anomalies influence tooth growth patterns of South American sea lions

Challenges for the development of environmentally sustainable cage culture farming in Lake Maninjau, Indonesia: an institutional perspective

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