Relationships between sea surface temperature, salinity, and pelagic fish distribution off northern Chile

Castillo, Jorge; Barbieri, María Ángela; González, Alberto Alonso

doi:10.1006/jmsc.1996.0014

Cited by 78 publications

(46 citation statements)

References 6 publications

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“…Often an increase in biological activity along such fronts is called the "edge-effect" and most fish have been found to accumulate at fronts (Roberts, 1980;Kleckner and McCleave, 1988;Castillo et al, 1996;Reese et al, 2011). Fish accumulations along fronts are driven by two factors, optimum temperature conditions and increased prey availability at the front (Owen, 1981;Largier, 1993).…”

Section: Importance Of Cooling Eventsmentioning

confidence: 99%

Understanding the Impact of Environmental Variability on Anchovy Overwintering Migration in the Black Sea and its Implications for the Fishing Industry

2017

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Black Sea anchovy (Engraulis encrasicolus) undertake extensive overwintering migrations every fall from nursery grounds to warmer overwintering areas located on the south-eastern coast of the Black Sea. During migration and particularly upon arrival at the Anatolian coast, they support an important fishery and valuable source of income for the regional community. Black Sea anchovy have undergone significant stock fluctuations partly related to climatic conditions; for example, migrating anchovy schools arrived late or failed to arrive at the Anatolian coast when fall temperatures increased. It is therefore of importance to understand the conditions required for successful overwintering migration and explore different migration routes. This study invokes a Lagrangian modeling approach applied to satellite derived circulation and temperature data as a first attempt to model anchovy migration dynamics in the Black Sea. This modeling approach takes the influence of the physical environment into account, while the quality of overwintering grounds, adaptive, schooling, and homing behavior is neglected. The model is used to investigate the possible influence of interannual and seasonal variability of temperature and surface currents, as well as the influence of migration behavior on the success of anchovy overwintering migration for both the Black Sea and Azov Sea anchovy. The results of the present work show the possibility that overwintering anchovy fished along the Turkish Eastern Anatolian coast may not exclusively originate from the northwestern shelf, but mainly from the eastern Black Sea basin. Migration pathways are identified for both Black Sea and Azov Sea anchovy, which are of importance for the national fisheries efforts of riparian countries. The modeling results are in agreement with general patterns of anchovy migration given in the literature indicating that the physical environment may be a major factor in shaping general migration patterns. Simulation results are used to hypothesize about alternatives to previously determined migration routes and provide potential reasons that explain the inability of the Bulgarian anchovy fishery to recover. Results show that the intensity and timing of autumnal cooling, coupled with current Guraslan et al.Environmental Impact on Anchovy Overwintering Migration strength, can be of significant importance in determining annual and seasonal variability of migration success. Considering the need for fisheries management to account for the variability in fishable overwintering anchovy stocks a modeling approach as developed in the current study may provide such a tool.

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Section: Importance Of Cooling Eventsmentioning

confidence: 99%

Understanding the Impact of Environmental Variability on Anchovy Overwintering Migration in the Black Sea and its Implications for the Fishing Industry

2017

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“…Forage fish distributions are strongly linked to ocean temperatures in the California Current (Lluch-Belda et al 1992) as well as in other coastal upwelling systems (Castillo et al 1996). The appearance of forage fish schools at the deep and shallow mooring sites occurred shortly after a sharp rise in sea surface temperature to about 11°C.…”

Section: Discussionmentioning

confidence: 99%

Timing of forage fish seasonal appearance in the Columbia River plume and link to ocean conditions

Kaltenberg¹,

Emmett²,

Benoit‐Bird³

2010

Mar. Ecol. Prog. Ser.

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This study described the phenology and patterns of variability of forage fish and mesozooplankton populations near the Columbia River plume. Our objective was to identify the timing of the seasonal appearance of forage fish and to characterize the temporal patterns of abundance in relation to ocean conditions including zooplankton availability. Observations were collected at 2 stations in 2008 and 2009 using 200 kHz bio-acoustic moorings, and with bi-weekly net sampling surveys conducted at nearby stations to measure total fish density and relative species composition. Acoustic time series results revealed that the seasonal timing of acoustic schools, representing the forage fishes northern anchovy Engraulis mordax, whitebait smelt Allosmerus elongatus, and Pacific sardine Sardinops sagax, occurred abruptly, with specific dates of appearance identified at each station in mid-May in both years. Both 2008 and 2009 represented very similar years for the timing and strength of wind-driven coastal upwelling. The timing of forage fish appearances in these years was linked with ocean temperature and salinity data collected at a nearby oceanographic buoy but was poorly correlated with mesozooplankton abundance, which was highly variable and fluctuating over a period of hours to days. Fluctuations in zooplankton and forage fish populations drive many trophic interactions, including juvenile salmon, seabirds, and large predators (e.g. adult salmon) that rely on the timing and abundances of these populations and have significant implications for ecosystem based management.

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“…aggregation of the albacore in clear water on the oceanic side of fronts in near-shore areas reflects an inability to efficiently capture large, mobile prey in turbid coastal water and a dependence on food that has migrated across the coastal-oceanic boundary. The distribution and prevalence of anchovy, sardine and jack mackerel have also been associated with the occurrence of thermal and haline fronts (Castillo, Barbieri, Gonzalez 1996;Chassott et al 2011;Fiedler, Bernard 1987;Kimura, Nakai, Sugimoto 1997;Logerwell, Smith 2001;Owen 1981).…”

Section: Environmental Indicators Of Fish Distributionmentioning

confidence: 99%

“…Wright et al (1976) found that the average catches of coho salmon off the Oregon coast were double in forecast areas detected by airborne remote sensors, as compared to non-forecast areas. There are many similar examples of improved fishing efficiency when remotely sensed data are provided to fishing fleets and included in predictive models (Carr 2001;Castillo, Barbieri, Gonzalez 1996;Dagorn, Petit, Stretta 1997;Santos 2000;Stretta 1991;Zainuddin et al 2006). Therefore, it becomes obvious that remote sensing can play an important role in guiding fleets to optimal fishing grounds, resulting in a more efficient fishing effort with greater economic returns.…”

Section: Introductionmentioning

confidence: 99%

Remote sensing of environmental indicators of potential fish aggregation: An overview

Klemas

2012

Baltica

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Sustainable use of marine resources requires effective monitoring and management of the world’s fish stocks. Acoustic and electromagnetic remote sensing techniques are being used to help manage fisheries at sustainable levels, while also guiding fishing fleets to locate fish schools more efficiently. Fish tend to aggregate in ocean areas that exhibit conditions favored by specific fish species. Some of the relevant oceanographic conditions, such as sea surface temperature, ocean color (productivity) and oceanic fronts, which strongly influence natural fluctuations of fish stocks, can be observed and measured by remote sensors on satellites, aircraft and ships. The remotely sensed data are provided in near-real time to help fishermen save fuel and ship time during their search for fish, to modelers who produce fisheries forecasts, and to scientists who help develop strategies for sustainable fisheries management. This article describes how acoustic, optical and radar sensors on ships, satellites and aircraft are used with forecast models to improve the management and harvesting of fisheries resources.

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Relationships between sea surface temperature, salinity, and pelagic fish distribution off northern Chile

Cited by 78 publications

References 6 publications

Understanding the Impact of Environmental Variability on Anchovy Overwintering Migration in the Black Sea and its Implications for the Fishing Industry

Understanding the Impact of Environmental Variability on Anchovy Overwintering Migration in the Black Sea and its Implications for the Fishing Industry

Timing of forage fish seasonal appearance in the Columbia River plume and link to ocean conditions

Remote sensing of environmental indicators of potential fish aggregation: An overview

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