Homepage  Homepage     Search on site  Search on site     To write the letter  To write the letter     Site map  Site map
Agro Perspectiva
We are on: 
   
 


Home > News > News

Assessing El Niños impact on fisheries and aquaculture around the world

22.04.2020 18:20 "Agro Perspectiva" (Kyiv) While considerable resources are invested in seasonal forecasts and early-warning systems for food security, not enough is known about El Niño’s impact on the fisheries and aquaculture sectors, even though its name was given in the 1600s by fishers off the coast of Peru.

To remedy that, FAO is publishing, in partnership with French National Research Institute for Sustainable Development (IRD France), the report El Niño Southern Oscillation (ENSO) effects on fisheries and aquaculture. This report captures the current state of knowledge on the impacts of ENSO events across sectors, from food security to safety at sea, from fish biology and fishing operation to management measures.

El Niño is widely known as a climate pattern that begins over the Pacific Ocean but wreaks havoc on ecosystems in land and water far away from its origin. Its consequences include droughts and major harvest shortfalls in large swatches of Africa and Indonesia, forest fires in Australia, and serious flooding in South America.

ENSOs are often simplified to reflect two main phases: El Niño, an anomalous warming phase in the central and/or eastern equatorial Pacific Ocean, and an opposite cooling phase called La Niña.

In the former phase, a thickened surface layer of warm water prevents cold and nutrient-rich deep ocean water to reach the surface layer where photosynthesis occcurs, putting a break on ocean production. This lowers the availability of food to local fish species such as anchoveta, which in turn either migrate southwards or suffer a productivity collapse.

While understanding of ENSOs has developed greatly since the 1950s, researchers have also been stymied as its incidences are rarely similar. Adding to the complexity is that the frequency and intensity of these events appear to have intensified in the past two decades, with some climate models suggesting these trends may continue as the climate changes.

«ENSO is not just a binary phenomenon (either warm or cold). Every ENSO event is different in signal, intensity, duration, and so are their consequences,» says Arnaud Bertrand, marine ecologist at IRD, who coordinated the report. "Understanding the diversity is key to developing predictive and preparatory capacities.

Key points

International experts based in Chile, France and Peru were recruited to produce this report. It addresses successively the diversity of ENSO events; ENSO forecasting; ENSO in the context of climate change; global overview of ENSO impacts; Assessment of regional ENSO impacts on marine capture fisheries; coral bleaching and damage to reefs and related fisheries; ENSO and aquaculture; ENSO and inland capture fisheries.

Five broad types of ENSO were identified: Extreme El Niño, Moderate Eastern Pacific (EP) El Niño, Moderate Central Pacific (CP) El Niño, Coastal El Niño, Strong La Niña. The authors also recognize that these five types are not static. ENSO events generally worsen with the effects of climate change on fish and fisheries, but the evidence is not yet conclusive enough.

For marine fisheries, the volume as well as the dominant species in fish catches can change dramatically depending on the type of ENSO. While the bulk of the net change is on Eastern Pacific fisheries, there are notable impacts on some fish populations in the Atlantic Ocean and some impact on tuna fisheries in the Indian Ocean. Further analysis of fish populations and sizes could shed light on longer-term effects as ENSO events alter habitats and marine food webs long after they are over.

Fostering nimble fishing techniques can contribute to resilience, as Peruvian fishers showed when they adjusted to catch more shrimp that moved into warmer waters and thus offset the missing anchoveta. At the same time, the authors note that El Niño events do not necessarily favour alternative species productivity of sardine and mackerel populations but rather increase their susceptibility to capture — relevant information for fisheries management systems in operation.

Evidence also suggests that ENSO events can significantly impact aquaculture output, particularly for marine plants, mollusks and crustaceans, while triggering shifts to more drought-resistance species in inland fisheries in countries such as Uganda.

Currently, reasonable forecasts can be made up to six months in advance, but with very little ability to predict which (ENSO) type will occur. ENSO has important impacts on cyclonic activity, ocean conditions or precipitation. The authors conclude the report with perspectives for ENSO preparedness in a warmer world.

Agro Perspectiva

< FAO urges at G20 meeting protection of food supply chains amid COVID-19 threat All news for
22.04.2020
EBRD targets coronavirus financing of EUR21 billion through 2021 >

04.12.2022  
17:09 Global cereal production and trade forecast to fall to three-year lows
17:06 45 countries need external assistance for food
16:37 Global food prices overall hold steady in November
01.12.2022  
04:16 Cargill announces acquisition of Owensboro Grain Company
03:14 FAO and Pacific nations weigh local innovations as solutions to growing climate and nutrition challenges
02:37 Global Environment Facility tasks FAO and IFAD to lead new $230 million agrifood systems transformation program
02:15 Cargill Appoints Brian Sikes as President and Chief Executive Officer, and Dave MacLennan as Executive Chair of the Board
23.11.2022  
05:44 Australia sugar production for 2022/23 is estimated to rise slightly to 4.4 MMT
21.11.2022  
07:54 U.S. provides up to $20 mln for Grain from Ukraine initiative
07:25 Grain from Ukraine program foresees provision of at least 5 mln people with grain until end of spring 2023
16.11.2022  
10:02 World sugar production - 179.6 million tonnes - FAOs preliminary forecast
15.11.2022  
20:11 Rice. The 2022/23 global harvest is still envisaged to remain at an overall average level of 512.6 million tonnes
19:38 World wheat production is forecast to reach a record 784 million tonnes in 2022/23,
19:32 Alarming signs as the global food import bill set to rise to nearly US$2 trillion due to higher prices
10.11.2022  
13:35 Conflict on the Black Sea: a review of Ukraine sunflowerseed
08.11.2022  
08:12 Ukraine: FAO reinforces its presence to optimize technical and humanitarian assistance
02.11.2022  
09:52 Pork. Global production is forecast to rise 1 percent in 2023 to 111.0 million tons as production in China increases
09:33 Turkey raises tariff on imported sunflowerseed
09:24 India: The FSSAI's 2021 Draft Amendments to the Approval of Non-Specified Food and Food Ingredients Regulation is now a Final Amendment in 2022
31.10.2022  
08:00 New $250 million USAID grant will boost FAOs efforts to strengthen global health security and agrifood systems
07:45 Global market overview onions
28.10.2022  
07:00 China: Worlds Largest Walnut Producer Turns to Exports
27.10.2022  
08:44 Credit Union Member Farmers in Ukraine Receive Free Fuel Through Worldwide Foundation for Credit Unions Program
24.10.2022  
13:37 EBRD commits up to EUR3 billion to Ukraine
21.10.2022  
17:00 European Commission and EIB initiate feasibility study to better connect Ukrainian and Moldovan railway networks with EU
14.10.2022  
20:15 EBRD and United Kingdom join forces to back Ukrenergo
20:11 Canada and EBRD join forces to support Ukraines Naftogaz
12.10.2022  
21:03 Strong Farmer Selling Sparks Argentina Exports
20:32 EU Corn Imports Remain High with Smaller Crop
10.10.2022  
19:54 Inflation in Ukraine up to 1.9% in Sept, to 24.6% in annual terms - statistics
09.10.2022  
10:54 Turkey Peach and Nectarine Prospects Continue to Ripen
09:32 EU27 sugar production for MY 2022/23 is forecast at 16 MMT
07.10.2022  
11:35 World Bank improves forecast for growth of Ukrainian economy in 2023 to 3.3%
11:17 Asia-Pacific countries urged to rapidly transform agrifood systems as hopes fade for achieving the Sustainable Development Goals by 2030
11:11 Lower forecasts for 2022/23 global cereal output, utilization and trade
11:05 FAO Food Price Index drops for the sixth consecutive month
10:26 How sustainable forest management can enhance the worlds biodiversity
05.10.2022  
10:22 Turkeys pistachio production in MY 2022/23 is forecast to increase year-over-year to 210,000 MT
04.10.2022  
20:05 World Bank improves forecast for growth of Ukrainian economy in 2023 to 3.3%
12:11 Tackling food loss and waste: A triple win opportunity
28.09.2022  
08:47 EBRD expects Ukraines economy to contract by nearly a third in 2022
27.09.2022  
15:48 Farmers sowed 961,000 hectares of winter rapeseed
13.09.2022  
07:03 China vegetable oil imports plunge in 2021/22 but forecast to recover in 2022/23
05:00 India Imposes Export Restrictions on Certain Types of Rice
08.09.2022  
16:43 Famine in Somalia projected, lives of millions of people are at immediate risk, UN says
05.09.2022  
19:00 Lower cereal production outlook underpins downward revisions for utilization and stocks in 2022/23
18:55 World food commodity prices dip for fifth month in a row in August
31.08.2022  
08:55 BASF and Corteva Agriscience collaborate to deliver the future of weed control to soybean farmers
29.08.2022  
23:37 Ukraine and Moldova abolish permits for intl cargo transportation from Sept
14:57 Chile: Walnut production estimates in 165,000 MT in 2022/23 MY

Also available: 


NewsNews - News - News - News - News - News
BriefWeekly Reports - Free article
SubscriptionTariff - News&Reports
AdvertisingMagazine - Site
ConferencesForum AGRO-2013 - DAIRY WORLD-2008 - FERTILIZERS-2010
Statistics
For our clientsAgroNewsDaily - Ukrainian Grain&Oilseed Market - Fertilizers - Milk Monthly - Milk Weekly
About usAbout project - Contact
2002 -2022 © Agrarika, ltd.
tel.: +380 44 5934543; +380 44 5934540
e-mail: client@agroperspectiva.com