Decadal-scale variability of sardine and anchovy simulated with an end-to-end coupled model of the Canary Current ecosystem

El Niño as a predictor of round sardinella distribution along the northwest African coast

“…In contrast to the major role that food availability plays for determining sardine and anchovy abundance in the northern part of the CCUS (Sánchez-Garrido et al, 2019), the present analyses indicate that the alteration of the variability in nutrient abundance associated with El Niño seems to play a minor role for the El Niño-round sardinella teleconnection. This is actually consistent with previous works which suggest that the currents and the water temperature are the main environmental variables influencing the round sardinella variability in the southern part of this upwelling system (Zeeberg et al, 2008, Bacha et al, 2017.…”

Dynamics of anchovy and sardine populations in the Canary Current off NW Africa: Responses to environmental and climate forcing in a climate‐to‐fish ecosystem model

“…For a comprehensive description of the model, the reader is referred to Rose et al (2015); here, we summarize the main model features and the set up for the present application to the CanCS. Further details of the model configuration, calibration strategy, and skill assessments of the specific simulation for the CanCS analyzed here can be found in Sánchez-Garrido et al (2019).…”

“…The IBM incorporates a coastal anchovy-like species, a more oceanic sardine-like species, and a generic predatory fish species. For a detailed description of the IBM, specific parameter values for anchovy and sardine, and model skill assessment based on landings (FAO, 2001;FAO, 2012) and acoustic surveys observations in the CanCS (Arístegui et al, 2009), the reader is referred to Sánchez-Garrido et al (2019). super-individuals, represent a variable amount of identical fish individuals (super-individual's worth).…”

“…Recently, Sánchez-Garrido et al (2019) demonstrated the flexibility of the formulation used by Rose et al (2015) by adapting the CCS end-to-end model to the CanCS. Modification of key parameters capturing distinctive traits and behavior of the European sardine and anchovy (reproductive phenology, optimum temperatures, and allometric coefficients) resulted in synchronous variability of these two species.…”

“…Namely, they did not show how multi-year fluctuations of the ocean circulation and physics propagate through the food web, from lower-trophic levels to fish early life stages, and ultimately to the adult populations. This paper addresses this gap by revisiting the simulation of Sánchez-Garrido et al (2019) following the approach used in for the CCS.…”