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Size structure and body condition of Ponto-Caspian gammarids in the Vistula estuary (Poland)

Aldona Dobrzycka-Krahel

Aldona Dobrzycka-Krahel

University of Gdańsk, Faculty of Oceanography and Geography, Institute of Oceanography, Department of Experimental Ecology of Marine OrganismsGdynia, Poland
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Dobrzycka-Krahel, Aldona
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Anna Tarała

Anna Tarała

  • University of Gdańsk, Faculty of Oceanography and Geography, Institute of Oceanography, Department of Experimental Ecology of Marine OrganismsGdynia, Poland
  • Maritime Institute in GdańskGdańsk, Poland
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Tarała, Anna
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Wojciech Majkowski

Wojciech Majkowski

University of Gdańsk, Faculty of Oceanography and Geography, Institute of Oceanography, Department of Experimental Ecology of Marine OrganismsGdynia, Poland
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Majkowski, Wojciech
  
14 mar 2019
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Categoria dell'articolo: Original research paper
Pubblicato online: 14 mar 2019
Pagine: 23 - 30
Ricevuto: 27 feb 2018
Accettato: 09 lug 2018
DOI: https://doi.org/10.1515/ohs-2019-0003
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© 2019 Faculty of Oceanography and Geography, University of Gdańsk, Poland
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Sampling locations of Ponto-Caspian gammarids in the Vistula estuary: the Vistula Lagoon (VL) and the Vistula Delta (VD)
Sampling locations of Ponto-Caspian gammarids in the Vistula estuary: the Vistula Lagoon (VL) and the Vistula Delta (VD)

Figure 2

Length–frequency distribution of Ponto-Caspian gammarids in the Vistula estuary in warm months of 2009–2011
Length–frequency distribution of Ponto-Caspian gammarids in the Vistula estuary in warm months of 2009–2011

Figure 3

Relationship between total length and wet weight of Ponto-Caspian gammarids in the Vistula estuary in warm months of 2009–2011
Relationship between total length and wet weight of Ponto-Caspian gammarids in the Vistula estuary in warm months of 2009–2011

Descriptive statistics of body length (L) and wet weight (W) of gammarid species from the Vistula Lagoon and the Vistula Delta in 2009–2011

Species N % L (mm) ± SD W (g) ± SD
P. robustoides 374 24 8.55 ± 4.02 0.019 ± 0.047
O. crassus 617 41 5.93 ± 1.82 0.003 ± 0.004
D. haemobaphes 530 35 7.73 ± 2.65 0.012 ± 0.011

Calculated intercepts (a) and slopes (b) in the total length–wet weight relationship regression models y = axb of gammarids from different areas and for different numbers of individuals (n)

Species Area of occurrence intercepts (a) slopes (b) individuals (n) Reference
Pontogammarus robustoides Vistula Lagoon and Delta Europe: Poland (brackish environment) 0.0107 3.1317 374 current study
Obesogammarus crassus 0.0041 3.5461 617
Dikerogammarus haemobaphes 0.141 2.0896 530
Pontogammarus robustoides Gulf of Gdańsk Europe: Poland (brackish environment) 0.0367 2.852 72 Dobrzycka-Krahel et al. 2016
Obesogammarus crassus Dikerogamarus haemobaphes 0.0069 3.3477 75
Dikerogammarus villosus 0.0033 3.7855 225
0.0674 2.852 117
Gammarus sp. Black Sea (brackish environment) 0.0016 2.87 20 Rosati et al. 2012
Gammarus minus North America (freshwater environment) 0.012 2.74 Basset & Glazier 1995
Gammarus pseudolimnaeus 0.0049 3.001 37 Marchant & Hynes 1981
Gammaridae Mediterranean (transiti onal and waters) Black Sea 0.0046 1.2 20 Rosati et al. 2012
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