Tropical South-East Atlantic response to ENSO as an ecosystem indicator for the southern Benguela

Jury,

doi:10.2989/18142320609504132

Cited by 5 publications

(2 citation statements)

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“…A synthesis of impacts of ENSO types on ocean conditions and weather in the southeast Atlantic is presented in Table 6.17. In the Benguela upwelling ecosystem (Jury, 2006), anchovy (Engraulis encrasicolus) catches tend to increase after El Niño events, while sardine (Sardinops sagax) catches improve after La Niña events, with both responses having a delay of several months. However, considering the weak correlation between ENSO and oceanic conditions in the equatorial Atlantic and the scarcity of studies relating to ENSO and fish and fisheries, we conclude that there is currently no robust evidence of any impact of ENSO on fish and fisheries of the southeast Atlantic Ocean.…”

Section: Impacts On Ocean Conditions and Climatementioning

confidence: 99%

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

Bertrand

Lengaigne

Takahashi³

et al. 2020

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The designations employed and the presentation of material in this information product do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations (FAO) concerning the legal or development status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Dashed lines on maps represent approximate border lines for which there may not yet be full agreement. The mention of specific companies or products of manufacturers, whether or not these have been patented, does not imply that these have been endorsed or recommended by FAO in preference to others of a similar nature that are not mentionedThe views expressed in this information product are those of the author(s) and do not necessarily reflect the views or policies of FAO.

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Section: Impacts On Ocean Conditions and Climatementioning

confidence: 99%

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

Bertrand

Lengaigne

Takahashi³

et al. 2020

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“…Retrospective studies that account for slow variations of the ocean and the life history and migration patterns of the fish have been conducted in the past 50 years using physical oceanographic fields [20,21]. The alternation of sardine and anchovy landings [1,22] has been attributed to environmental conditions that affect spawning and feeding location [23][24][25]. Because of the worldwide extent and quasidecadal time scale of fishery fluctuations, global oceanatmosphere coupling has been proposed as a driver [26] through features such as the Pacific decadal oscillation (PDO), the North Atlantic oscillation (NAO) [27,28], and the El Niño southern oscillation (ENSO) [21,29,30].…”

Section: Introductionmentioning

confidence: 99%

Environmental Influences on South African Fish Catch: South Coast Transition

Jury

2011

International Journal of Oceanography

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This study considers environmental factors influencing aggregate fish catch in the South Coast transition of South Africa. The environmental forcing is studied via (i) seasonal analysis of SeaWifs chlorophyll and related variables, (ii) composite analysis of atmospheric and oceanographic reanalysis data, (iii) statistical analysis of annual FAO fish catch with climatic indices, and (iv) analysis of depth-latitude hydrographic sections over the shelf (33–36S, 22–26E). In years of higher fish catch there is a northward shift of the subtropical anticyclones and upwelling that is partially related to Pacific El Nino. Westerly troughs skirt the Agulhas Bank creating onshore Ekman transport. Higher sea surface height inshore, and cooler sea temperatures and lower salinity offshore induce a gradient that weakens the Agulhas Current. These environmental conditions favour the southeastward migration of juvenile fish from west to south coast. A multivariate model of aggregate fish stocks, using four environmental variables: salinity and zonal currents in the Agulhas Current, sea temperature in the Agulhas source region, and geopotential height over the Cape, accounts for 53% of variance at 0-1 year lead. Freshening of the boundary current is a factor influencing aggregate fish catch in the South Coast transition.

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