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Parameterisation of a population model for Acartia spp. in the Southern Baltic Sea. Part 2. Egg production

100%

Dzierzbicka-Glowacka L., Lemieszek A., Zmijewska M. I.

Oceanologia

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2009

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tom 51

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nr 2

185-201

The paper describes the modelling ofeg g production in Acartia spp. under changing environmental conditions in the southern Baltic Sea (Gdańsk Deep). The hypothesis (Sekiguchi et al. 1980) that the food-saturated rate of egg matter production is equivalent to specific growth rate ofco pepods is applied. The average number ofeggs produced per day by one Acartia female is obtained as a function ofg rowth rate, i.e. by multiplying exp gN3 − 1 from the growth rate of the nauplius stage equation by Wfemale/Wegg. The copepod model, reduced to a zerodimensional population model calibrated for Acartia spp. under the environmental conditions typical ofthe southern Baltic Sea, was used to determine the effects of temperature and food concentration on the growth rate ofeac h oft he model stages (see Part 1 – Dzierzbicka-Głowacka et al. 2009 – this issue). In this part, egg production as a function of the above parameters is evaluated. The rate of reproduction during the seasons in the upper layer ofthe Gdańsk Deep is also determined.

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Influence of environmental factors on the population dynamics of key zooplankton species in the Gulf of Gdansk (Southern Baltic Sea)

84%

Musialik-Koszarowska M., Dzierzbicka-Glowacka L., Weydmann A.

Oceanologia

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2019

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tom 61

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nr 1

3

Parameterisation of a population model for Acartia spp. in the Southern Baltic Sea. Part 1. Development time

84%

Dzierzbicka-Glowacka L., Lemieszek A., Zmijewska M. I.

Oceanologia

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2009

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tom 51

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nr 2

165-184

The copepod model (see Dzierzbicka-Głowacka 2005b),red uced to a zero-dimensional population model (Fennel 2001,S tegert et al. 2007),i s calibrated for Acartia spp. under the environmental conditions typical of the southern Baltic Sea. Most of the coefficients used in the model are taken from the literature,co ntaining values from various published studies and parameters derived for similar species. The parameters for growth are presented in Part 1; those for population dynamics are given in Part 2. Ingestion rates,whic h are dependent on developmental stage, food supply,temp erature and weight of the animals, are estimated for Acartia bifilosa at 15◦C from the Gdańsk Deep after the experimental data of Ciszewski & Witek (1977). In Part 1 the model presents the change in mean individual mass in successive stages. Quantitative formulae are obtained describing the effects of temperature and food concentration on the development time of Acartia spp. for each of the model stage groups. The generation time during the seasons in the upper layer of the Gdańsk Deep is also determined. The simulations computed here are similar to the experimental results. Part 2 (Dzierzbicka-Głowacka et al. 2009 – this issue) will evaluate egg production as a function of the above-mentioned parameters,temp erature and food availability.

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Impact of prey field variability on early cod larval survival: a sensitivity study of a Baltic cod Individual-based Model

67%

Schmidt J. O., Hinrichsen H.-H.

Oceanologia

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2008

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tom 50

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nr 2

205-220

Existing coupled biophysical models for Baltic larval cod drift, growth and survival use idealised constructed mean prey fields of nauplius distributions. These simulations revealed the best feeding conditions for Baltic cod larvae longer than 6 mm. For shorter, first feeding larvae (between 4.5 and 6 mm) pronounced differences in growth and survival were observed, which depend on food availability and to a lesser degree on ambient temperature. We performed runs with an Individual-based Model (IBM) for Baltic cod larvae in order to demonstrate how natural variability in prey abundance influences the survival success of first feeding larvae. In the Baltic, this larval stage lives mainly between 20 and 40 m depth and feeds exclusively on the nauplii of different calanoid copepods (Acartia spp., Pseudocalanus acuspes, Temora longicornis and Centropages hamatus). Prey data obtained from vertically stratified samples in the Bornholm Basin (Baltic Sea) in 2001 and 2002 indicate a strong variability at spatial and temporal scales. We calculated larval survival and growth in relation to natural variation of prey fields, i.e. species-specific nauplius abundance. The results of the model runs yielded larval survival rates from 60 to 100% if the mean size of nauplii species was taken and lower survival if prey consisted of early nauplius stages only.

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Interannual variability in the population dynamics of the main mesozooplankton species in the Gulf of Gdansk (Southern Baltic Sea): Seasonal and spatial distribution

67%

Dzierzbicka-Glowacka L., Kalarus M., Zmijewska M. I.

Oceanologia

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2013

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tom 55

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nr 2

Ograniczanie wyników

5 Oceanologia

4 Dzierzbicka-Glowacka L.

3 Zmijewska M. I.

2 Lemieszek A.

1 Hinrichsen H.-H.

1 Kalarus M.

1 Musialik-Koszarowska M.

1 Schmidt J. O.

1 Weydmann A.

1 2019

1 2013

2 2009

1 2008

Parameterisation of a population model for Acartia spp. in the Southern Baltic Sea. Part 2. Egg production

Influence of environmental factors on the population dynamics of key zooplankton species in the Gulf of Gdansk (Southern Baltic Sea)

Parameterisation of a population model for Acartia spp. in the Southern Baltic Sea. Part 1. Development time

Impact of prey field variability on early cod larval survival: a sensitivity study of a Baltic cod Individual-based Model

Interannual variability in the population dynamics of the main mesozooplankton species in the Gulf of Gdansk (Southern Baltic Sea): Seasonal and spatial distribution