Persistence and co-occurrence of demersal nurseries in the Strait of Sicily (central Mediterranean): Implications for fishery management

Garofalo, Germana; Fortibuoni, Tomaso; Gristina, Michele; Sinopoli, Mauro; Fiorentino, Fabio

doi:10.1016/j.seares.2011.04.008

Cited by 46 publications

(53 citation statements)

References 34 publications

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“…Mar. Sci., 16/1, 2015, 117-127 119 Carapace length and stage of maturity were the criteria used to ascertain the recruit and spawner fractions of the population, respectively (Fiorentino et al, 2003;Garofalo et al, 2011). Length frequency distribution (LFD), mean length and standard deviation of the first modal component were analyzed to calculate the cut-off length (mean length ± standard deviation) identifying the juvenile fraction of the population in each survey.…”

Section: Methodsmentioning

confidence: 99%

“…The recruitment of many species is also influenced by the condition of mature adults (spawners) as a consequence of their exploitation or specific environmental stimuli (Company et al, 2008;Sardà et al, 2009;Carbonel et al, 2010). Understanding the relationship between environmental variations and the successful recruitment of target species is another emerging issue (Lloret et al, 2001;Bartolino et al, 2008;Massutì et al, 2008;Garofalo et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Distribution of Spawning and Nursery Grounds for Deep–water Red Shrimps in the Central Western Mediterranean Sea

Palmas¹,

Addis

Cabiddu

et al. 2014

Medit. Mar. Sci.

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The presence of spawning and nursery grounds of Aristeids in the central western Mediterranean Sea were investigated using fishery-independent data (trawl surveys, 1994-2012). Spatial distributions were generated for mature animals and recruits, for both spring/summer and autumn data, using an inverse distance-weighted deterministic interpolation. The persistence index was used to identify stable spawning and nursery grounds in the Sardinian slope region for Aristaeomorpha foliacea and Aristeus antennatus. Areas of aggregation for recruits and mature females appear to be connected with important physical habitat features. The analysis also suggests a seasonal bathymetric distribution for nursery areas. The recruits of A. foliacea are located in the upper part of the continental slope (377-450 m) in spring/summer and reach greater depths (468-628 m) in autumn. For A. antennatus, for which nursery areas only emerge in autumn, there is presumably an opposite ontogenic migration, from deep sea to upper slope, during the summer (575-681 m). The results also indicate a partial overlap between the nursery and spawning grounds of both species. In this particular area, local environmental conditions such as upwelling events or the presence of canyons and seamounts seem to play an important role in their distribution. This study also generated relevant information on the spatial and temporal distribution of seasonal or persistent aggregations of spawners and recruits, providing scientific elements to suggest the protection of these important resources.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distribution of Spawning and Nursery Grounds for Deep–water Red Shrimps in the Central Western Mediterranean Sea

Palmas¹,

Addis

Cabiddu

et al. 2014

Medit. Mar. Sci.

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“…The density corresponding to the third quartile of this distribution, i.e. encompassing 75 % of the cumulative density, was selected as the cut-off value to identify the density hot spots (Fiorentino et al 2003;Garofalo et al 2011).…”

Section: Methodsmentioning

confidence: 99%

“…To assess the spatiotemporal stability of the density hot spots, a persistence index (PI; Garofalo et al 2011) was calculated by overlapping the maps of the whole time series and counting, on a cell-by-cell basis (1 km 9 1 km), the number of times a given area was classified as an annual density hot spot. This index was obtained as a ratio of the number of times a given area was classified as a hot spot to the total number of years.…”

Section: Methodsmentioning

confidence: 99%

Distribution and biological features of the common pandora, Pagellus erythrinus (Linnaeus, 1758), in the southern Tyrrhenian Sea (Central Mediterranean)

et al. 2014

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A synthetic analysis of the distribution, abundance and some biological traits of the common pandora (Pagellus erythrinus) was performed. Data were gathered in 15 experimental bottom trawl surveys carried out off the southern Tyrrhenian Sea from 1994 to 2008. A total of 2,166 P. erythrinus were found in the investigated area, with a preference for the upper continental shelf (10-100 m). The highest persistence was recorded in the trawl-banned areas. The sex ratio Sr = F/(F ? M) ranged between 0.60 and 0.96 (overall 0.78). The size at which 50 % of the individuals were mature was 157 and 170 mm total length for females and males, respectively. The length-weight relationship for all individuals was described by the following parameters: a = 0.016 and b = 2.905. Growth was evaluated (sexes combined) by applying length-based methods; up to eight significant modal components were evidenced. The von Bertalanffy growth parameters for the whole population were estimated at L ? = 454 mm, K = 0.08 and t 0 = -2.57. The present results are in agreement with the information available for the other Mediterranean stocks suggesting common biological features.

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“…This finding has population-level implications, because abundance data of young sharks (e.g. catch per unit effort) can be used as a proxy for young shark habitat productivity (Garofalo et al 2011). Therefore, this collection of embayments may act to stabilise total recruitment of adult C. leucas in this ) within each site is evident (B to I; s = annual mean).…”

Section: Potential Drivers Of Portfolio Effects In Sharksmentioning

confidence: 99%

Diversity in young shark habitats provides the potential for portfolio effects

Yates¹,

Heupel²,

Tobin³

et al. 2012

Mar. Ecol. Prog. Ser.

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The young (neonates, young-of-the-year and juveniles) of many shark species occupy a diverse range of habitats and areas. However, the contribution of individual nurseries or habitats to an adult population is difficult to quantify. In addition, little attention has been paid to the potential importance of 'non-nursery' young shark habitats to the long-term sustainability of shark populations. Portfolio theory predicts that contributions from a diverse range of young shark habitats may reduce variability in the overall production of adults, and maintain population resilience. This review examines case studies of portfolio effects in teleost fish and evaluates the relevance and potential implications of these processes for shark populations. Environmental heterogeneity in young shark habitats can result in locally adapted habitat-use patterns and life history traits. Therefore, young shark habitats may be differentially impacted by anthropogenic disturbance or environmental change, with different habitats performing well at different times. In addition, increased stability in production may be achieved when the effects of localised disturbance in one area are buffered by production in others. However, the behavioural and life history characteristics of some shark species may limit portfolio effects. These include the repeated use of a narrow range of habitats or areas for reproduction, and the production of relatively stable numbers of offspring. This description of the relevance of portfolio theory to shark populations highlights the importance of maintaining habitat diversity. KEY WORDS: Shark · Nursery · Portfolio effect · Population sustainability · Elasmobranch · FisheriesResale or republication not permitted without written consent of the publisher

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Persistence and co-occurrence of demersal nurseries in the Strait of Sicily (central Mediterranean): Implications for fishery management

Cited by 46 publications

References 34 publications

Distribution of Spawning and Nursery Grounds for Deep–water Red Shrimps in the Central Western Mediterranean Sea

Distribution of Spawning and Nursery Grounds for Deep–water Red Shrimps in the Central Western Mediterranean Sea

Distribution and biological features of the common pandora, Pagellus erythrinus (Linnaeus, 1758), in the southern Tyrrhenian Sea (Central Mediterranean)

Diversity in young shark habitats provides the potential for portfolio effects

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