Field data analysis and application of a complex water column biogeochemical model in different areas of a semi-enclosed basin: towards the development of an ecosystem management tool

Petihakis, G.; Triantafyllou, G.; Pollani, A.; Koliou, A.; Θεοδώρου, Α.

doi:10.1016/j.marenvres.2004.07.004

Cited by 45 publications

(50 citation statements)

References 17 publications

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“…In all cases, these values were the highest for the populations within Pagasitikos and the lowest for those between Pagasitikos and Aegean Sea (Table 3). These results further support the hypothesis that the oceanographic and bathymetric conditions prevailing in the Pagasitikos Gulf may reduce gene flow between locations from within and outside the Gulf (Petihakis et al 2005). Although, the N e m values of the present study were much smaller than the mean value for marine fishes (N e m = 22.76, ) and allow significant divergence of gene frequencies among samples, they were large enough (>1) to counteract the effect of genetic drift if one assumes an infinite island model (Kimura 1955).…”

Section: Discussionsupporting

confidence: 81%

Genetic structure of three marine fishes from the Gulf of Pagasitikos (Greece) based on allozymes, RAPD, and mtDNA RFLP markers

et al. 2009

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In the present work we used three molecular techniques (allozymes, RAPDs and mtDNA RFLPs) in order to study the genetic structure of three commercial marine species (Mullus surmuletus, Mullus barbatus, and Pagellus erythrinus). Each species was sampled from three locations within the Gulf of Pagasitikos, Greece and from two neighbouring locations outside the Gulf (Trikeri and Alonissos). Values of genetic heterozygosity and nucleotide diversity for all populations studied were similar or above the mean values observed in marine fishes. None of the three types of molecular markers used revealed diagnostic patterns, which could allow the allocation of individuals to one of the populations. The analyses revealed that the three populations within Pagasitikos were homogenous representing thus a panmictic stock. However, there were evidences of genetic population subdivision between localities from inside and outside of the Pagasitikos Gulf. The results provide essential information for the design of a sustainable management plan of the Gulf of Pagasitikos and its demersal fish resources.

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Section: Discussionsupporting

confidence: 81%

Genetic structure of three marine fishes from the Gulf of Pagasitikos (Greece) based on allozymes, RAPD, and mtDNA RFLP markers

et al. 2009

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“…It is a semienclosed shallow water basin (mean depth is 69 m) in which the water masses are cold and homogeneous in winter (12.6 °C) and highly stratified in the summer (27.5 °C) (Petihakis et al, 2005). In the sampling area (Kato Gatzea: 39°18′457″N, 23°05′869″E), the bottom consists mainly of a soft substratum with a sparse meadow of the seagrass Zostera marina Linnaeus, 1753 and patches of rocks, dominated by communities of photophilic algae (Lolas and Vafidis, 2013).…”

Section: Methodsmentioning

confidence: 99%

Reproductive cycle of the traditionally exploited sea cucumber Holothuria tubulosa (Holothuroidea: Aspidochirotida) in Pagasitikos Gulf, western Aegean Sea, Greece

Kazanidis¹,

Lolas²,

Vafidis³

2014

Turk J Zool

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In this work, tensile and yield stress and tensile and yield strain of oblique layer functionally graded steels produced by electroslag remelting were investigated. Functionally graded steels containing ferrite, austenite, bainite, and/or martensite layers may be fabricated via diffusion of alloying elements during the remelting stage. Tensile and yield stress and tensile and yield strain of functionally graded steels depend on the composition, containing layers, and angles of oblique layers. By increasing the angle of layers with respect to the load axis, the tensile and yield stresses of functionally graded steels were decreased.

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“…The average value of current speed was 3.5 and 4.0 cm s -1 for the AS and BS farms, respectively (in 1998 to 1999). For both fish farms, the main current direction was from the land to the centre of Pagasitikos Gulf (Petihakis et al 2005). At each fish farm, 3 stations were sampled, upstream from the main current direction.…”

Section: Study Area Pagasitikos Is Located In the Westernmentioning

confidence: 99%

Spatial and temporal effects of fish farming on benthic community structure in a semi-enclosed gulf of the Eastern Mediterranean

Neofitou

Vafidis²,

Klaoudatos³

2010

Aquacult. Environ. Interact.

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Spatial and temporal effects of fish farming on the benthic community structure at 2 fish farms in the Eastern Mediterranean were investigated between July 2004 and April 2005. In the area of each fish farm, 3 stations were sampled. At each station, sediment samples were collected for analysis of organic carbon, organic matter and benthic community parameters. There were statistically significant differences in organic matter and organic carbon among all stations. This impact seems to be only spatial, since 1-way ANOVA indicated no significant differences in organic matter and organic carbon between seasons for both farms. Furthermore, significant differences were found in species number, abundance and species richness among stations and seasons for one of the farms (2-way ANOVA). One-way ANOVA indicated that the significant differences, detected in the benthic community parameters of this farm, were spatio-temporal for species number, temporal for abundance and spatial for species richness. The spatial effect of fish farming on benthic community structure was present up to 50 m from the centre of cages on one farm and between 50 and 300 m from the other farm. Capitella capitata was the most dominant species at the farm sites, while Nephthys hystricis was the most dominant species at the control sites. In all cases, the benthic assemblages in the immediate vicinity showed symptoms of disturbance, but the spatial and temporal extent of this effect was less than one would expect considering the fact that the study area is located in a semi-enclosed gulf.

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Field data analysis and application of a complex water column biogeochemical model in different areas of a semi-enclosed basin: towards the development of an ecosystem management tool

Cited by 45 publications

References 17 publications

Genetic structure of three marine fishes from the Gulf of Pagasitikos (Greece) based on allozymes, RAPD, and mtDNA RFLP markers

Genetic structure of three marine fishes from the Gulf of Pagasitikos (Greece) based on allozymes, RAPD, and mtDNA RFLP markers

Reproductive cycle of the traditionally exploited sea cucumber Holothuria tubulosa (Holothuroidea: Aspidochirotida) in Pagasitikos Gulf, western Aegean Sea, Greece

Spatial and temporal effects of fish farming on benthic community structure in a semi-enclosed gulf of the Eastern Mediterranean

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