The influence of oceanographic scenarios on the population dynamics of demersal resources in the western Mediterranean: Hypothesis for hake and red shrimp off Balearic Islands

Massutí, Enric; Monserrat, Sebastià; Oliver, Pere; Moranta, Joan; López-Jurado, José Luís; Marcos, Marta; Hidalgo, Manuel; Guijarro, Beatríz; Carbonell, Aïna; Pereda, Pilar

doi:10.1016/j.jmarsys.2007.01.009

Cited by 58 publications

(45 citation statements)

References 47 publications

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“…For the NA hake stock, we used annual mean values of the Gulf Stream index (GULF; http:// web.pml.ac.uk/ gulfstream/data.htm), which is the first principal component of the position of the North Wall of the Gulf Stream (Taylor 1995 1946−20101963−20111964−20101961−2010197819821980Years used 1946−20001963−200719821983−2002197919831981 ) offshore of the NW Spanish peninsula (see 'Methods' in Lavín et al 1991). For the BI hake we used the IDEA index, a mesoscale (regional) hydro-climatic index based on the air-sea heat fluxes in the Gulf of Lions during winter (Massutí et al 2008. For the NEA and NS cod, we used the North Atlantic Oscillation calculated for winter months (wNAO) (Hurrell & Deser 2009).…”

Section: Environmental Datamentioning

confidence: 99%

Population growth across heterogeneous environments: effects of harvesting and age structure

Durant

Hidalgo²,

Rouyer³

et al. 2013

Mar. Ecol. Prog. Ser.

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Population growth is affected by several factors such as climate, species interaction and harvesting pressure. However, additional complexity can arise if fishing increases the sensitivity to environmental variability. To predict the effects of fisheries and climate on marine populations, there is a need for improved understanding of how they affect key ecological processes such as population growth. In this study, we used a comparative approach investigating commercially fished species across different ecosystems: the Norwegian Sea−Barents Sea (Northeast Arctic cod), the North Sea (North Sea cod), the Atlantic Ocean (European hake), the Mediterranean Sea (European hake), and the Gulf of Alaska and Bering Sea (walleye pollock). Our objective was to compare the effects of commercial fisheries, age structure and environmental variability on population growth rate. We show that although all stocks experienced a decline in abundance, only 3 of them showed a concomitant decreasing trend in generation time (South Atlantic hake, North Atlantic hake and Northeast Arctic cod), suggesting a fishing-induced erosion in their age structure. Intra-specific analysis shows that changes in generation time triggered an increase in the relative contribution of recruitment to population growth. Furthermore, the contribution from recruitment to population growth changes due to large-scale climate indices or regional-scale environmental covariates, such as sea temperature. This study illustrates how and where the interaction between large-scale ecological patterns and regional/short-scale processes are important for designing management regulations.

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Section: Environmental Datamentioning

confidence: 99%

Population growth across heterogeneous environments: effects of harvesting and age structure

Durant

Hidalgo²,

Rouyer³

et al. 2013

Mar. Ecol. Prog. Ser.

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“…The increase in food after flooding events might favor the different stages of the sole's life cycle, enhancing its population size. In the Balearic Islands, Massutí et al (2008) demonstrated that regional and global climate indices, such as NAO and MO, would influence the population dynamics of hake Merluccius merluccius and the deep-sea red shrimp Aristeus antennatus, favouring productivity and benefiting the recruitment of these species. On the Catalan coast, long-term variability in catches of the red shrimp and in the composition and diversity of deep sea communities have also been related to climatic oscillations (Maynou 2008, Cartes et al 2009).…”

Section: Evidence Of Changementioning

confidence: 99%

Effects of climate change on Mediterranean marine ecosystems: the case of the Catalan Sea

Calvo¹,

Simó²,

Coma³

et al. 2011

Clim. Res.

146

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The Catalan Sea, located between the eastern Iberian coast and the Balearic Islands, is a representative portion of the western Mediterranean basin and provides a valuable case study for climate change effects on Mediterranean ecosystems. Global warming is reflected regionally by a rise in sea level over the last century, an increase in surface temperature of around 1.1°C in the last 35 yr, a progressive salinisation of intermediate and deep waters and a strengthening of the stratification. A likely scenario of what we can expect in the Mediterranean Sea is a considerable decrease in rainfall and wind, warmer surface waters and a prolonged stratification period. The effects on Mediterranean ecosystems are evident in: (1) a meridionalisation of the algal, invertebrate and vertebrate species, which favours the more thermophilic species over the temperate species; (2) mass mortality events of sessile invertebrates of the coralligenous communities owing to anomalous warm waters during the period when food is scarce; (3) increases in the smallest phytoplankton due to the prolongation of the water stratification period; (4) proliferation of gelatinous carnivores, including jellyfish, due to the temperature rise and the lack of rainfall; (5) a faster acidification of seawater, compared with the global oceans, accompanied by a decrease in the capacity to absorb atmospheric CO 2 . In order to anticipate and mitigate these predicted changes, we recommend investing in research and observation, conserving areas that serve as indicators of climate change and reducing other anthropogenic pressures such as habitat destruction, overfishing or pollution, which may act synergistically to accelerate these changes.

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“…= scale class 0 the first year of life) at time t, SSB is the spawning stock biomass, and ε is a stochastic environment. α, β and γ parameters were taken from Massutí et al (2008), where α = 175.81, β = -0.043 and γ = -0.422. This model explained 46% of the variance.…”

Section: Time Series Analysesmentioning

confidence: 99%

“…Two environmental scenarios were investigated (ε, stochastic environment) for recruitment: (1) white noise (balancedvariance mix of low and high frequencies) was used as a control experiment, and (2) red noise, which is characterised by a dominance of low frequencies in the signal, was used as a more realistic environmental scenario (Vasseur & Yodzis 2004) consistent with the IDEA index that drives recruitment . For the 2 scenarios, the total variance of the environmental signal was calibrated on the variance of the environmental signal used for the fit of the recruitment curve of Massutí et al (2008). Simulations were run over 250 yr (Fig.…”

Section: Time Series Analysesmentioning

confidence: 99%

Synergistic effects of fishing-induced demographic changes and climate variation on fish population dynamics

Hidalgo

Rouyer²,

Molinero³

et al. 2011

Mar. Ecol. Prog. Ser.

101

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The influence of oceanographic scenarios on the population dynamics of demersal resources in the western Mediterranean: Hypothesis for hake and red shrimp off Balearic Islands

Cited by 58 publications

References 47 publications

Population growth across heterogeneous environments: effects of harvesting and age structure

Population growth across heterogeneous environments: effects of harvesting and age structure

Effects of climate change on Mediterranean marine ecosystems: the case of the Catalan Sea

Synergistic effects of fishing-induced demographic changes and climate variation on fish population dynamics

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