Spawning ecology of the European anchovy (Engraulis encrasicolus) in the Strait of Sicily: Linking variations of zooplankton prey, fish density, growth, and reproduction in an upwelling system

Basilone, Gualtiero; Ferreri, Rosalia; Barra, Marco; Bonanno, A.; Pulizzi, Maurizio; Gargano, Antonella; Fontana, Ignazio; Giacalone, Giovanni; Rumolo, Paola; Mazzola, Salvatore; Genovese, Simona; McBride, Richard S.; Aronica, Salvatore

doi:10.1016/j.pocean.2020.102330

Cited by 17 publications

(21 citation statements)

References 55 publications

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“…However, density dependence was also confirmed in TEPPSW (i.e., per unit weight) in chub mackerel. This observation is similar to the density‐dependent effects on daily specific fecundity (the number of eggs produced per gram of SSB) of ( E. encrasicolus ) in a recent study (Basilone et al., 2020). Although age structure and maturation rate could also vary with the phase of population dynamics (Watanabe & Yatsu, 2004, 2006; Yukami et al., 2017b), the essential results were robust in the sensitivity analysis under different assumptions of maturation rate (Table 1).…”

Section: Discussionsupporting

confidence: 89%

“…In contrast, the phenomenon of density dependence in TEPPS/TEPPSW has been masked in the For sardine and anchovy, the intraspecific (sardine) and interspecific (anchovy) density dependence in TEPPS/TEPPSW was attributed to maternal effects through competition for food resources required as energy for reproduction (Takasuka et al, 2019a(Takasuka et al, , 2019b. Food availability influences egg production in small pelagic fish (Basilone et al, 2013(Basilone et al, , 2020McBride et al, 2015;Somarakis, Tsoukali, Giannoulaki, Schismenou, & Nikolioudakis, 2019). Sardine and anchovy compete for food resources because of their trophic overlap throughout their life histories in the Kuroshio Current system (Yasue, Doiuchi, & Takasuka, 2014) as in sardine Sardina pilchardus and anchovy E. encrasicolus in the Mediterranean Sea (Rumolo et al, 2016), even though the habitat and trophic dissimilarities between sardine and anchovy were reported mainly from upwelling systems (Barra et al, 2015;Checkley et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

“…The analysis revealed that the SSB–TEP proportionality was partially distorted by strong intraspecific density‐dependent effects on TEPPS/TEPPSW, even though the proportionality was significant overall. Growth and reproductive parameters could be density‐dependent in various species (Basilone et al., 2020; Cowan, Rose, & DeVries, 2000; Hannesson, 2018; van der Lingen, Fréon, Fairweather, & van der Westhuizen, 2006). For chub mackerel, previous studies showed density‐dependent effects on growth and maturation in the long term (Watanabe & Yatsu, 2004, 2006).…”

Section: Discussionmentioning

confidence: 99%

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Density‐dependent egg production in chub mackerel in the Kuroshio Current system

Takasuka

Yoneda

Oozeki

2020

Fisheries Oceanography

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A paradigm of proportionality between spawning stock biomass (SSB) and total egg production (TEP) has been largely untested at multidecadal scales mainly because of difficulty in estimating annual TEP. Recently, this paradigm was directly tested for sardine (Sardinops melanostictus) and anchovy (Engraulis japonicus) at a multidecadal scale to reveal that SSB-TEP proportionality was partially distorted by intraspecific (sardine) and interspecific (anchovy) density dependence in total egg production How to cite this article: Takasuka A, Yoneda M, Oozeki Y.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Density‐dependent egg production in chub mackerel in the Kuroshio Current system

Takasuka

Yoneda

Oozeki

2020

Fisheries Oceanography

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“…Our work, proposing a top-down control hypothesis, adds further evidence of the strong link between coastal zooplankton and SPF species. Therefore, small changes in the Mediterranean zooplankton communities may have a significant impact on the success of commercially important SPF species and vice versa (Mercado et al, 2007;Quintanilla et al, 2015Quintanilla et al, , 2020Basilone et al, 2020). Observations indicate that the zooplankton biomass remains higher in ALB than in MED (Yebra, unpubl.…”

Section: Zooplankton Standing Stock Control In the Western Mediterranmentioning

confidence: 99%

Zooplankton Biomass Depletion Event Reveals the Importance of Small Pelagic Fish Top-Down Control in the Western Mediterranean Coastal Waters

et al. 2020

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The influence of hydrochemistry and trophic conditions on the coastal zooplankton community’s biomass and metabolic activities was investigated along the Spanish Mediterranean coastal waters, from Algeciras Bay to Barcelona, from autumn 2011 to autumn 2012. Two hydrographic regions were differentiated: NW Alboran (ALB) and W Mediterranean (MED). Zooplankton metabolism was assessed from measurements of the electron transport system (ETS) and aminoacyl-tRNA synthetases (AARS) activities, as proxies for potential respiration and somatic growth, respectively. Zooplankton showed three to fivefold higher biomass in ALB than in MED during autumn 2011 and spring 2012. However, in autumn 2012, a drastic decrease in biomass standing stock was observed in ALB, with no significant differences between the two regions. This biomass depletion event was not associated with environmental variables, food availability or zooplankton metabolic rates, but coincided with a twofold peak of Sardina pilchardus landings in ALB. A reduced standing stock coupled with high zooplankton growth rates suggests mortality by predation as the main cause for the low zooplankton biomass typically observed in MED, and in ALB during autumn 2012.

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“…According to recommendations by the Scientific, Technical and Economic Committee for Fisheries of the European Union (STECF) [ 20 ] and the General Fisheries Commission for the Mediterranean (GFCM), management plans should improve estimates of model parameters or biomass evaluation to provide sustainable stock exploitation [ 21 , 22 ]. In the Strait of Sicily, a long-time series of acoustic and ichthyoplankton-based biomass evaluation showed high inter-annual fluctuations in biomass, especially linked to environmental variability [ 3 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

New Evaluation of Postovulatory Follicle Degeneration at High-Temperature Regimes Refines Criteria for the Identification of Spawning Cohorts in the European Anchovy (Engraulis encrasicolus)

Ferreri

Barra

Gargano

et al. 2021

Animals

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Accurate stock assessment estimates of fish resources are essential in fishery management. Wide fluctuations in abundance arising from variations in reproductive success are characteristic of many marine fish populations, including multiple spawner species. The proportion of females spawning per day is crucial in the application of egg production methods for spawning biomass evaluation and, usually, is assessed by postovulatory follicle (POF) method. Describing each degeneration stage of POF based upon its histological features allows for obtaining an aging key for postovulatory follicles. The commercially valuable European anchovy (Engraulis encrasicolus) was selected as a case study, which breeds during the summer in temperate waters (24 °C–25 °C). A collection of ovary slides, sampled in the central Mediterranean Sea during the spawning peak, provided a 24 h cycle coverage. These observations allowed us to evaluate the duration of each POF stage at water temperature experienced by anchovy in the study area. Present results demonstrated the POF degeneration progress at a faster rate than reported by previous investigations, carried out in cooler oceanic waters. Furthermore, the present study displayed the presence of two anchovy spawning cohorts sampled along a 24-h cycle. Therefore, this study not only provides useful insight for more accurate POF degeneration evaluation in temperate waters, but also suggests that current estimates should be complemented with validation studies according to different temperature regimes.

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Spawning ecology of the European anchovy (Engraulis encrasicolus) in the Strait of Sicily: Linking variations of zooplankton prey, fish density, growth, and reproduction in an upwelling system

Cited by 17 publications

References 55 publications

Density‐dependent egg production in chub mackerel in the Kuroshio Current system

Density‐dependent egg production in chub mackerel in the Kuroshio Current system

Zooplankton Biomass Depletion Event Reveals the Importance of Small Pelagic Fish Top-Down Control in the Western Mediterranean Coastal Waters

New Evaluation of Postovulatory Follicle Degeneration at High-Temperature Regimes Refines Criteria for the Identification of Spawning Cohorts in the European Anchovy (Engraulis encrasicolus)

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