Demersal fish and megafaunal assemblages on the Cretan continental shelf and slope (NE Mediterranean): seasonal variation in species density, biomass and diversity

Kallianiotis, Argyris; Sophronidis, Kostas; Vidoris, Pavlos; Τσελεπίδης, Α.

doi:10.1016/s0079-6611(00)00028-8

Cited by 108 publications

(102 citation statements)

References 20 publications

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“…Moreover, the comparison of our results with those obtained from the quantitative analysis of different taxonomic groups undertaken in other areas of the Mediterranean also shows that the bathymetric distribution of demersal resources, considered as a whole, is also more complex than those associations found within the separated groups of cephalopods, crustaceans and fishes (González and Sánchez, 2002;Maynou and Cartes, 2000;Demestre et al, 2000;respectively). On the other hand, our results are similar to those obtained from the analysis of the whole demersal macrofauna developed in the central (Biagi et al, 2002;Colloca et al, 2003) and eastern (Kallianiotis et al, 2000) Mediterranean, which identified assemblages on the coastal shelf, middle shelf, shelf-edge, shallow upper-slope and deep upper-slope.…”

Section: Discussionsupporting

confidence: 89%

“…The possible explanatory causes of these temporal changes are far from being well known, but some causes, probably inter-correlated, can be argued. According to Kallianiotis et al (2000), "water temperature over the continental shelf starts to increase in early spring and fish that winter there, gradually migrate to their spawning grounds. After spawning most fish begin their feeding migration in summer and during autumn the massive recruitment migration occurs.…”

Section: Discussionmentioning

confidence: 99%

“…Demersal fish, crustacean and cephalopod assemblages in the Mediterranean Sea have been widely studied along the western (Demestre et al, 2000;Abelló et al, 2002;González and Sánchez, 2002; and references cited therein), central (Biagi et al, 2002;Colloca et al, 2003) and eastern (Labropoulou and Papaconstantinou, 2000;Kallianiotis et al, 2000) coasts. As concerns the Balearic Islands, the available information is related to fish and crustacean assemblages on bathyal slope bot-SCI.…”

Section: Introductionmentioning

confidence: 99%

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Demersal resource assemblages in the trawl fishing grounds off the Balearic Islands (western Mediterranean)

Massutí¹,

Reñones²

2005

Sci. Mar.

124

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SUMMARY:The demersal resources distributed in the trawl fishing grounds off the Balearic Islands (western Mediterranean) were studied from two bottom trawl surveys carried out in spring and autumn along the continental shelf and upper slope off the islands of Mallorca and Menorca. A total of 88 hauls, between 41 and 745 m depth, were analysed by means of multivariate analysis and ecological parameter calculation in order to characterise the structure of commercial species assemblages. A different bathymetric distribution of abundance was observed by comparing the main taxonomic groups. Six main species assemblages were identified, primarily associated with depth but also with different macro-epibenthic communities. Seasonal or geographic differences were detected for three of these assemblages, which could be related to differences in habitats and macro-epibenthic communities, as well as to seasonal changes in the abundance of some species related to their life cycle.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Demersal resource assemblages in the trawl fishing grounds off the Balearic Islands (western Mediterranean)

Massutí¹,

Reñones²

2005

Sci. Mar.

124

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“…These bathymetric strata are coincident with the assemblages of demersal macro-fauna in the western (Massutí and Reñones, 2005), central (Biagi et al, 2002;Colloca et al, 2003) and eastern (Kallianiotis et al, 2000) Mediterranean.…”

Section: Discussionmentioning

confidence: 74%

Balearic Islands vs Algeria: two nearby western Mediterranean elasmobranch assemblages with different oceanographic scenarios and fishing histories

Ordines¹,

Massutí²,

Moranta³

et al. 2011

Sci. Mar.

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SUMMARY: In this paper we compare the elasmobranch composition, depth-related trends of species and community descriptors (abundance, biomass, mean fish weight, species richness and diversity) of the Balearic Islands Archipelago and Algeria (north-and southwestern Mediterranean, respectively). The samples used in this study were collected in bottom trawl surveys between 36 and 779 m depth. Generalized linear models, linear regression, cluster and similarity percentage analyses, and generalized additive models were used to compare the two areas. Twenty-nine elasmobranch species were caught, 12 of them common to both areas, 7 appearing only in the Balearic Islands, and 10 only in Algeria. The bathymetric distributions of species were, in most cases, best fitted to uni-modal response curves. The models for species common to both areas showed similar bathymetric trends, except for Etmopterus spinax, which in Algeria showed a maximum abundance located 154 m shallower than in the Balearic Islands. Four bathymetric assemblages were identified in both areas with similar depth ranges but with different species composition. The mean values of the community descriptors were higher on the shelf in the Balearic Islands, whereas higher values were detected on the slope in Algeria. Different between-area bathymetric trends for all the descriptors were detected, with the exception of mean fish weight. The distinct environmental scenarios and fishing histories of the areas studied are discussed as underlying traits influencing the elasmobranch populations.Keywords: community descriptors, bathymetric trends, environmental factors, fishing mortality, threatened species. RESUMEN: Islas Baleares vs Argelia: dos poblaciones cercanas de elasmobranquios en el Mediterráneo occidental con distintas condiciones oceanográficas e historias pesqueras. -Este artículo compara la composición específica de elasmobranquios, su tendencia batimétrica, e indicadores de comunidad (abundancia, biomasa, peso medio individual, riqueza específica y diversidad) del archipiélago de las Islas Baleares y Argelia (Mediterráneo nor-y sur-occidental, respectivamente). Las muestras utilizadas se recogieron en campañas de arrastre entre 36-779 m de profundidad. Para comparar las dos áreas se utilizaron modelos lineales generalizados, regresión lineal, análisis de cluster y de porcentaje de similitud, y modelos aditivos generalizados. Se capturaron 29 especies de elasmobranquios; 12 fueron comunes a ambas áreas, 7 aparecieron sólo en las Balears, y 10 sólo en Argelia. En general, la distribución batimétrica de las especies se ajustó mejor a una curva de respuesta unimodal. Las especies comunes a ambas áreas mostraron tendencias batimétricas similares, excepto Etmopterus spinax que en Argelia mostró un máximo de abundancia localizado 154 m por encima del registrado en el Archipiélago. Se identificaron 4 comunidades batimétricas en ambas áreas con rangos de profundidad similares, pero con distinta composición específica. Los valores medios de los indicadores de comu...

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“…Fish display a strong association to season, especially with regard to their breeding strategies, with young fish often being produced when environmental conditions are most favorable (Bowden et al 2007). Seasonal changes in species density, biomass, and diversity were also significant on the Cretan continental shelf and slope (Kallianiotis et al 2000).…”

Section: Water Qualitymentioning

confidence: 93%

A new framework to evaluate ecosystem health: a case study in the Wei River basin, China

Zhan

et al. 2015

Environ Monit Assess

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Demersal fish and megafaunal assemblages on the Cretan continental shelf and slope (NE Mediterranean): seasonal variation in species density, biomass and diversity

Cited by 108 publications

References 20 publications

Demersal resource assemblages in the trawl fishing grounds off the Balearic Islands (western Mediterranean)

Demersal resource assemblages in the trawl fishing grounds off the Balearic Islands (western Mediterranean)

Balearic Islands vs Algeria: two nearby western Mediterranean elasmobranch assemblages with different oceanographic scenarios and fishing histories

A new framework to evaluate ecosystem health: a case study in the Wei River basin, China

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