Zeitschriften und Ausgaben

Volumen 51 (2022): Heft 4 (December 2022)

Volumen 51 (2022): Heft 3 (September 2022)

Volumen 51 (2022): Heft 2 (June 2022)

Volumen 51 (2022): Heft 1 (March 2022)

Volumen 50 (2021): Heft 4 (December 2021)

Volumen 50 (2021): Heft 3 (September 2021)

Volumen 50 (2021): Heft 2 (June 2021)

Volumen 50 (2021): Heft 1 (March 2021)

Volumen 49 (2020): Heft 4 (December 2020)

Volumen 49 (2020): Heft 3 (September 2020)

Volumen 49 (2020): Heft 2 (June 2020)

Volumen 49 (2020): Heft 1 (March 2020)

Volumen 48 (2019): Heft 4 (December 2019)

Volumen 48 (2019): Heft 3 (September 2019)

Volumen 48 (2019): Heft 2 (June 2019)

Volumen 48 (2019): Heft 1 (March 2019)

Volumen 47 (2018): Heft 4 (December 2018)

Volumen 47 (2018): Heft 3 (September 2018)

Volumen 47 (2018): Heft 2 (June 2018)

Volumen 47 (2018): Heft 1 (March 2018)

Volumen 46 (2017): Heft 4 (December 2017)

Volumen 46 (2017): Heft 3 (September 2017)

Volumen 46 (2017): Heft 2 (June 2017)

Volumen 46 (2017): Heft 1 (March 2017)

Volumen 45 (2016): Heft 4 (December 2016)

Volumen 45 (2016): Heft 3 (September 2016)

Volumen 45 (2016): Heft 2 (June 2016)

Volumen 45 (2016): Heft 1 (March 2016)

Volumen 44 (2015): Heft 4 (December 2015)

Volumen 44 (2015): Heft 3 (September 2015)

Volumen 44 (2015): Heft 2 (June 2015)

Volumen 44 (2015): Heft 1 (March 2015)

Volumen 43 (2014): Heft 4 (December 2014)

Volumen 43 (2014): Heft 3 (September 2014)

Volumen 43 (2014): Heft 2 (June 2014)

Volumen 43 (2014): Heft 1 (March 2014)

Volumen 42 (2013): Heft 4 (December 2013)

Volumen 42 (2013): Heft 3 (September 2013)

Volumen 42 (2013): Heft 2 (June 2013)

Volumen 42 (2013): Heft 1 (March 2013)

Volumen 41 (2012): Heft 4 (December 2012)

Volumen 41 (2012): Heft 3 (September 2012)

Volumen 41 (2012): Heft 2 (June 2012)

Volumen 41 (2012): Heft 1 (March 2012)

Volumen 40 (2011): Heft 4 (December 2011)

Volumen 40 (2011): Heft 3 (September 2011)

Volumen 40 (2011): Heft 2 (June 2011)

Volumen 40 (2011): Heft 1 (March 2011)

Volumen 39 (2010): Heft 4 (December 2010)

Volumen 39 (2010): Heft 3 (September 2010)

Volumen 39 (2010): Heft 2 (June 2010)

Volumen 39 (2010): Heft 1 (March 2010)

Volumen 38 (2009): Heft 4 (December 2009)

Volumen 38 (2009): Heft 3 (September 2009)

Volumen 38 (2009): Heft 2 (June 2009)

Volumen 38 (2009): Heft 1 (March 2009)

Volumen 37 (2008): Heft 4 (December 2008)

Volumen 37 (2008): Heft 3 (September 2008)

Volumen 37 (2008): Heft 2 (June 2008)

Volumen 37 (2008): Heft 1 (March 2008)

Volumen 36 (2007): Heft 4 (December 2007)

Volumen 36 (2007): Heft 3 (September 2007)

Volumen 36 (2007): Heft 2 (June 2007)

Volumen 36 (2007): Heft 1 (March 2007)

Zeitschriftendaten
Format
Zeitschrift
eISSN
1897-3191
Erstveröffentlichung
23 Feb 2007
Erscheinungsweise
4 Hefte pro Jahr
Sprachen
Englisch

Suche

Volumen 51 (2022): Heft 3 (September 2022)

Zeitschriftendaten
Format
Zeitschrift
eISSN
1897-3191
Erstveröffentlichung
23 Feb 2007
Erscheinungsweise
4 Hefte pro Jahr
Sprachen
Englisch

Suche

5 Artikel
Uneingeschränkter Zugang

How do mussel provenance and spat size affect mussel aquaculture performance in the South-Western Mediterranean (Algeria)?

Online veröffentlicht: 07 Nov 2022
Seitenbereich: 239 - 256

Zusammenfassung

Abstract

The objective of this research was to study the effects of size and spat origin of farmed Mytilus galloprovinciallis in mussel longlines in the east of Bou-Ismail Bay (central coastal Algeria, south-western Mediterranean). The study was conducted from October 2017 to July 2020 in the east of Bou-Ismail Bay. The mussel spat were obtained from four origin sites (Tlemcen, Tenes, Ain Tagourait and the study site) and were seeded on three spat sizes (10–30, 30–60 and >60 mm). The production performance of this species was analysed on 284 random mussel plots using average physical product (APP), gain and loss rates, condition index (CI), percentage of edibility (PE) and shell thickness index (STI). Apart from the CI and loss rate, the performance indicators showed significant differences according to spat size and source (p < 0.05). Overall, the highest APP (4.3) was recorded for the small seeded mussels (10–30) mm and for those originating from Tlemcen, near finfish cages (APP = 4.14). These individuals exhibited more efficient growth and physiology for commercial size and performed better than the spat collected at the study site. The results can be considered a valid contribution to best farming practice for optimising the production of this species in Algeria. It also contributes to the development of integrated multitrophic aquaculture (IMTA) methodology, which is suitable for use in the oligotrophic Western Mediterranean.

Schlüsselwörter

  • Mediterranean mussel
  • farming
  • production
  • recruitment
  • Algeria
Uneingeschränkter Zugang

Heavy metal accumulation in a bioindicator species, Limpet Patella caerulea, in Yalova (İzmit Bay): Risk assessment for human health

Online veröffentlicht: 07 Nov 2022
Seitenbereich: 257 - 267

Zusammenfassung

Abstract

In this study, monthly heavy metal concentrations in the whole-body tissue of Patella caerulea (Mediterranean limpets), a bioindicator species living in the coastal zone of the Gulf of Izmit (Marmara Sea), were examined for the first time. The mean metal concentrations in Patella caerulea (mg kg−1 dw) were 2.01–5.74 Cd, 2.45–12.90 Cu, 0.74–1.95 Pb, 21.12–109.57 Zn, 16.31–154.67 Ni, and 1120.67–3086.00 Fe. Cd levels in all months and Pb levels in October and November were found to be above the safe limits set by international organizations. The estimated daily intakes and estimated weekly intakes determined for each heavy metal were below the acceptable daily intakes and provisional tolerable weekly intakes. However, the target hazard quotient and total target hazard quotient values calculated for Cd, Ni, and Fe were found to be higher than 1. The carcinogenic risk value was also found to be high.

Schlüsselwörter

  • bioaccumulation
  • limpet
  • target hazard quotient (THQ)
  • carcinogenic risk (CR)
  • Marmara Sea
Uneingeschränkter Zugang

The Ponto-Caspian and native amphipod life history in the Daugava River, Latvia

Online veröffentlicht: 07 Nov 2022
Seitenbereich: 268 - 282

Zusammenfassung

Abstract

Population structure, reproductive parameters and other life history traits are among the main preconditions for alien amphipods’ successful invasion. In the freshwaters of Northern Europe, i.e. Latvia, the overall life history of alien Ponto-Caspian amphipods is little known. Furthermore, the population structure and reproductivity of native Gammarus pulex have not been studied in Latvian freshwaters. The aim of the study was to describe the life history of Gammarus varsoviensis, Pontogammarus robustoides and the coexistent G. pulex. Their population structure, reproductive period and fecundity in the Daugava River were evaluated as part of this study from 2017 to 2019. The results revealed that the reproductive period of G. varsoviensis and P. robustoides lasted from four to five months, with up to three generations per year and a high proportion of juveniles. The average number of eggs for G. varsoviensis was 31 (maximum: 69) and for P. robustoides 28 (maximum: 81), with ovigerous females of both species being an average of 11.3 mm. Gammarus pulex had one generation per year with a high proportion of juveniles. The average number of eggs per brood was 27 (maximum: 41) with the average size of ovigerous females being 10.7 mm.

Schlüsselwörter

  • varsoviensis
  • Pontogammarus robustoides
  • Gammarus pulex
  • life history
  • Daugava River
Uneingeschränkter Zugang

Impact of cloud cover on local remote sensing – Piaśnica River case study

Online veröffentlicht: 07 Nov 2022
Seitenbereich: 283 - 297

Zusammenfassung

Abstract

New satellite-based techniques open up new horizons to researchers and local communities. Concurrently, however, requirements and expectations with regard to satel-lite-based remote sensing products are increasingly higher. By relying on satellite-derived information, environmental observations can cover areas of a few to several metres resolution. Here we are dealing with free-of-charge and generally available sources of satellite-based information. The Piaśnica River mouth area was selected as an observation site representing a highly dynamic morphological transect. The paper compares products of cloud cover detection, supplied with data and available in the Copernicus database for a local area in the coastal zone of the Baltic Sea. The absolute difference did not exceed 5%, which confirms a high efficiency of the solutions offered. More than 96% of the clouded area determined for the Sentinel-2/MSI (Multispectral Instrument) was correctly identified when compared with supervised observations. The rate was lower (92%) for the Sentinel-3/OLCI (Ocean and Land Colour Instrument). It was eventually concluded that, at the local level, successful observations can be conducted using the cloud cover map supplied with the satellite data. At the same time, the analyses presented do not rule out further efforts to, e.g., increase the accuracy and speed of the analyses.

Schlüsselwörter

  • remote sensing
  • cloud
  • coastal morphology
  • Piaśnica
  • coastal zone satellite observations
Uneingeschränkter Zugang

Spat efficiency of the smooth scallop Flexopecten glaber in the Aegean Sea, Türkiye

Online veröffentlicht: 07 Nov 2022
Seitenbereich: 298 - 307

Zusammenfassung

Abstract

This study was carried out to determine the spat efficiency of the smooth scallop Flexopecten glaber (Linnaeus) in surface and bottom water at the Ozbek coast (Türkiye) of the Aegean Sea from September 2017 to August 2018. The environmental parameters (temperature, salinity, chlorophyll-a, and total particulate matter) were also monitored at two depths. The average water temperature at the surface and bottom were 19.79 ± 5.62°C and 19.73 ± 5.24°C, respectively. The lowest chlorophyll-a values were recorded in February (1.12 g l−1) and June (1.23 μg l−1) at the surface and bottom, respectively. The highest chlorophyll-a value was recorded in August at both depths. Throughout the study, the number of F. glaber on the collectors was 270.33 ± 43.54 spat m−2 and 145.66 ± 18.03 spat m−2 were detected on the bottom collectors. A statistically significant difference was found between the growth of the spat attached to the surface and bottom collectors (p < 0.05).

Schlüsselwörter

  • smooth scallop
  • spat collector
  • bivalve
  • depth
  • spat attachment
  • growth
  • Aegean Sea
5 Artikel
Uneingeschränkter Zugang

How do mussel provenance and spat size affect mussel aquaculture performance in the South-Western Mediterranean (Algeria)?

Online veröffentlicht: 07 Nov 2022
Seitenbereich: 239 - 256

Zusammenfassung

Abstract

The objective of this research was to study the effects of size and spat origin of farmed Mytilus galloprovinciallis in mussel longlines in the east of Bou-Ismail Bay (central coastal Algeria, south-western Mediterranean). The study was conducted from October 2017 to July 2020 in the east of Bou-Ismail Bay. The mussel spat were obtained from four origin sites (Tlemcen, Tenes, Ain Tagourait and the study site) and were seeded on three spat sizes (10–30, 30–60 and >60 mm). The production performance of this species was analysed on 284 random mussel plots using average physical product (APP), gain and loss rates, condition index (CI), percentage of edibility (PE) and shell thickness index (STI). Apart from the CI and loss rate, the performance indicators showed significant differences according to spat size and source (p < 0.05). Overall, the highest APP (4.3) was recorded for the small seeded mussels (10–30) mm and for those originating from Tlemcen, near finfish cages (APP = 4.14). These individuals exhibited more efficient growth and physiology for commercial size and performed better than the spat collected at the study site. The results can be considered a valid contribution to best farming practice for optimising the production of this species in Algeria. It also contributes to the development of integrated multitrophic aquaculture (IMTA) methodology, which is suitable for use in the oligotrophic Western Mediterranean.

Schlüsselwörter

  • Mediterranean mussel
  • farming
  • production
  • recruitment
  • Algeria
Uneingeschränkter Zugang

Heavy metal accumulation in a bioindicator species, Limpet Patella caerulea, in Yalova (İzmit Bay): Risk assessment for human health

Online veröffentlicht: 07 Nov 2022
Seitenbereich: 257 - 267

Zusammenfassung

Abstract

In this study, monthly heavy metal concentrations in the whole-body tissue of Patella caerulea (Mediterranean limpets), a bioindicator species living in the coastal zone of the Gulf of Izmit (Marmara Sea), were examined for the first time. The mean metal concentrations in Patella caerulea (mg kg−1 dw) were 2.01–5.74 Cd, 2.45–12.90 Cu, 0.74–1.95 Pb, 21.12–109.57 Zn, 16.31–154.67 Ni, and 1120.67–3086.00 Fe. Cd levels in all months and Pb levels in October and November were found to be above the safe limits set by international organizations. The estimated daily intakes and estimated weekly intakes determined for each heavy metal were below the acceptable daily intakes and provisional tolerable weekly intakes. However, the target hazard quotient and total target hazard quotient values calculated for Cd, Ni, and Fe were found to be higher than 1. The carcinogenic risk value was also found to be high.

Schlüsselwörter

  • bioaccumulation
  • limpet
  • target hazard quotient (THQ)
  • carcinogenic risk (CR)
  • Marmara Sea
Uneingeschränkter Zugang

The Ponto-Caspian and native amphipod life history in the Daugava River, Latvia

Online veröffentlicht: 07 Nov 2022
Seitenbereich: 268 - 282

Zusammenfassung

Abstract

Population structure, reproductive parameters and other life history traits are among the main preconditions for alien amphipods’ successful invasion. In the freshwaters of Northern Europe, i.e. Latvia, the overall life history of alien Ponto-Caspian amphipods is little known. Furthermore, the population structure and reproductivity of native Gammarus pulex have not been studied in Latvian freshwaters. The aim of the study was to describe the life history of Gammarus varsoviensis, Pontogammarus robustoides and the coexistent G. pulex. Their population structure, reproductive period and fecundity in the Daugava River were evaluated as part of this study from 2017 to 2019. The results revealed that the reproductive period of G. varsoviensis and P. robustoides lasted from four to five months, with up to three generations per year and a high proportion of juveniles. The average number of eggs for G. varsoviensis was 31 (maximum: 69) and for P. robustoides 28 (maximum: 81), with ovigerous females of both species being an average of 11.3 mm. Gammarus pulex had one generation per year with a high proportion of juveniles. The average number of eggs per brood was 27 (maximum: 41) with the average size of ovigerous females being 10.7 mm.

Schlüsselwörter

  • varsoviensis
  • Pontogammarus robustoides
  • Gammarus pulex
  • life history
  • Daugava River
Uneingeschränkter Zugang

Impact of cloud cover on local remote sensing – Piaśnica River case study

Online veröffentlicht: 07 Nov 2022
Seitenbereich: 283 - 297

Zusammenfassung

Abstract

New satellite-based techniques open up new horizons to researchers and local communities. Concurrently, however, requirements and expectations with regard to satel-lite-based remote sensing products are increasingly higher. By relying on satellite-derived information, environmental observations can cover areas of a few to several metres resolution. Here we are dealing with free-of-charge and generally available sources of satellite-based information. The Piaśnica River mouth area was selected as an observation site representing a highly dynamic morphological transect. The paper compares products of cloud cover detection, supplied with data and available in the Copernicus database for a local area in the coastal zone of the Baltic Sea. The absolute difference did not exceed 5%, which confirms a high efficiency of the solutions offered. More than 96% of the clouded area determined for the Sentinel-2/MSI (Multispectral Instrument) was correctly identified when compared with supervised observations. The rate was lower (92%) for the Sentinel-3/OLCI (Ocean and Land Colour Instrument). It was eventually concluded that, at the local level, successful observations can be conducted using the cloud cover map supplied with the satellite data. At the same time, the analyses presented do not rule out further efforts to, e.g., increase the accuracy and speed of the analyses.

Schlüsselwörter

  • remote sensing
  • cloud
  • coastal morphology
  • Piaśnica
  • coastal zone satellite observations
Uneingeschränkter Zugang

Spat efficiency of the smooth scallop Flexopecten glaber in the Aegean Sea, Türkiye

Online veröffentlicht: 07 Nov 2022
Seitenbereich: 298 - 307

Zusammenfassung

Abstract

This study was carried out to determine the spat efficiency of the smooth scallop Flexopecten glaber (Linnaeus) in surface and bottom water at the Ozbek coast (Türkiye) of the Aegean Sea from September 2017 to August 2018. The environmental parameters (temperature, salinity, chlorophyll-a, and total particulate matter) were also monitored at two depths. The average water temperature at the surface and bottom were 19.79 ± 5.62°C and 19.73 ± 5.24°C, respectively. The lowest chlorophyll-a values were recorded in February (1.12 g l−1) and June (1.23 μg l−1) at the surface and bottom, respectively. The highest chlorophyll-a value was recorded in August at both depths. Throughout the study, the number of F. glaber on the collectors was 270.33 ± 43.54 spat m−2 and 145.66 ± 18.03 spat m−2 were detected on the bottom collectors. A statistically significant difference was found between the growth of the spat attached to the surface and bottom collectors (p < 0.05).

Schlüsselwörter

  • smooth scallop
  • spat collector
  • bivalve
  • depth
  • spat attachment
  • growth
  • Aegean Sea

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