Spatial and temporal variation in Baltic sprat (Sprattus sprattus balticus S.) batch fecundity

Holger Haslob, Jonna Tomkiewicz, Hans-Harald Hinrichsen, Gerd Kraus

Research output: Contribution to conferencePosterResearch

Abstract

Over the last decade the size of the Baltic sprat spawning stock declined from a record highof over 1.7 million tonnes in 1996 to 910.000 tonnes in 2008. From the perspective of stockrecovery it is of central interest how reproductive parameters have changed over this periodof strongly changing stock size. Batch fecundity of Baltic sprat (Sprattus sprattus balticusS.)during peak spawning time was investigated in relation to fish length and weight applyingthe hydrated oocyte method. A series of ten years was established covering importantspawning areas in the Central Baltic Sea, i. e., the Bornholm Basin, the Gdansk Deep and forsome years the Gotland Basin. Analysis of Covariance (ANCOVA) showed significantdifferences in batch fecundity of Baltic sprat between areas and years. To detect possiblecauses for this variation in batch fecundity environmental factors such as water temperature,salinity, oxygen content as well as fish and stock size were tested as explanatory variables. The data obtained in this investigation were used to develop a predictive model of Balticsprat batch fecundity. Coupling these results with existing ichthyoplankton survey and stockstructure data will allow applying the daily egg production method
Original languageEnglish
Publication date2009
Publication statusPublished - 2009
EventICES/PICES/UNCOVER Symposium 2009 on Rebuilding Depleted Fish Stocks: Biology, Ecology, Social Science and Management Strategies - Warnemünde/Rostock, Germany
Duration: 3 Nov 20096 Nov 2009

Conference

ConferenceICES/PICES/UNCOVER Symposium 2009 on Rebuilding Depleted Fish Stocks
CountryGermany
CityWarnemünde/Rostock
Period03/11/200906/11/2009

Cite this

Haslob, H., Tomkiewicz, J., Hinrichsen, H-H., & Kraus, G. (2009). Spatial and temporal variation in Baltic sprat (Sprattus sprattus balticus S.) batch fecundity. Poster session presented at ICES/PICES/UNCOVER Symposium 2009 on Rebuilding Depleted Fish Stocks, Warnemünde/Rostock, Germany.
Haslob, Holger ; Tomkiewicz, Jonna ; Hinrichsen, Hans-Harald ; Kraus, Gerd. / Spatial and temporal variation in Baltic sprat (Sprattus sprattus balticus S.) batch fecundity. Poster session presented at ICES/PICES/UNCOVER Symposium 2009 on Rebuilding Depleted Fish Stocks, Warnemünde/Rostock, Germany.
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title = "Spatial and temporal variation in Baltic sprat (Sprattus sprattus balticus S.) batch fecundity",
abstract = "Over the last decade the size of the Baltic sprat spawning stock declined from a record highof over 1.7 million tonnes in 1996 to 910.000 tonnes in 2008. From the perspective of stockrecovery it is of central interest how reproductive parameters have changed over this periodof strongly changing stock size. Batch fecundity of Baltic sprat (Sprattus sprattus balticusS.)during peak spawning time was investigated in relation to fish length and weight applyingthe hydrated oocyte method. A series of ten years was established covering importantspawning areas in the Central Baltic Sea, i. e., the Bornholm Basin, the Gdansk Deep and forsome years the Gotland Basin. Analysis of Covariance (ANCOVA) showed significantdifferences in batch fecundity of Baltic sprat between areas and years. To detect possiblecauses for this variation in batch fecundity environmental factors such as water temperature,salinity, oxygen content as well as fish and stock size were tested as explanatory variables. The data obtained in this investigation were used to develop a predictive model of Balticsprat batch fecundity. Coupling these results with existing ichthyoplankton survey and stockstructure data will allow applying the daily egg production method",
author = "Holger Haslob and Jonna Tomkiewicz and Hans-Harald Hinrichsen and Gerd Kraus",
year = "2009",
language = "English",
note = "ICES/PICES/UNCOVER Symposium 2009 on Rebuilding Depleted Fish Stocks : Biology, Ecology, Social Science and Management Strategies ; Conference date: 03-11-2009 Through 06-11-2009",

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Haslob, H, Tomkiewicz, J, Hinrichsen, H-H & Kraus, G 2009, 'Spatial and temporal variation in Baltic sprat (Sprattus sprattus balticus S.) batch fecundity', ICES/PICES/UNCOVER Symposium 2009 on Rebuilding Depleted Fish Stocks, Warnemünde/Rostock, Germany, 03/11/2009 - 06/11/2009.

Spatial and temporal variation in Baltic sprat (Sprattus sprattus balticus S.) batch fecundity. / Haslob, Holger; Tomkiewicz, Jonna; Hinrichsen, Hans-Harald; Kraus, Gerd.

2009. Poster session presented at ICES/PICES/UNCOVER Symposium 2009 on Rebuilding Depleted Fish Stocks, Warnemünde/Rostock, Germany.

Research output: Contribution to conferencePosterResearch

TY - CONF

T1 - Spatial and temporal variation in Baltic sprat (Sprattus sprattus balticus S.) batch fecundity

AU - Haslob, Holger

AU - Tomkiewicz, Jonna

AU - Hinrichsen, Hans-Harald

AU - Kraus, Gerd

PY - 2009

Y1 - 2009

N2 - Over the last decade the size of the Baltic sprat spawning stock declined from a record highof over 1.7 million tonnes in 1996 to 910.000 tonnes in 2008. From the perspective of stockrecovery it is of central interest how reproductive parameters have changed over this periodof strongly changing stock size. Batch fecundity of Baltic sprat (Sprattus sprattus balticusS.)during peak spawning time was investigated in relation to fish length and weight applyingthe hydrated oocyte method. A series of ten years was established covering importantspawning areas in the Central Baltic Sea, i. e., the Bornholm Basin, the Gdansk Deep and forsome years the Gotland Basin. Analysis of Covariance (ANCOVA) showed significantdifferences in batch fecundity of Baltic sprat between areas and years. To detect possiblecauses for this variation in batch fecundity environmental factors such as water temperature,salinity, oxygen content as well as fish and stock size were tested as explanatory variables. The data obtained in this investigation were used to develop a predictive model of Balticsprat batch fecundity. Coupling these results with existing ichthyoplankton survey and stockstructure data will allow applying the daily egg production method

AB - Over the last decade the size of the Baltic sprat spawning stock declined from a record highof over 1.7 million tonnes in 1996 to 910.000 tonnes in 2008. From the perspective of stockrecovery it is of central interest how reproductive parameters have changed over this periodof strongly changing stock size. Batch fecundity of Baltic sprat (Sprattus sprattus balticusS.)during peak spawning time was investigated in relation to fish length and weight applyingthe hydrated oocyte method. A series of ten years was established covering importantspawning areas in the Central Baltic Sea, i. e., the Bornholm Basin, the Gdansk Deep and forsome years the Gotland Basin. Analysis of Covariance (ANCOVA) showed significantdifferences in batch fecundity of Baltic sprat between areas and years. To detect possiblecauses for this variation in batch fecundity environmental factors such as water temperature,salinity, oxygen content as well as fish and stock size were tested as explanatory variables. The data obtained in this investigation were used to develop a predictive model of Balticsprat batch fecundity. Coupling these results with existing ichthyoplankton survey and stockstructure data will allow applying the daily egg production method

M3 - Poster

ER -

Haslob H, Tomkiewicz J, Hinrichsen H-H, Kraus G. Spatial and temporal variation in Baltic sprat (Sprattus sprattus balticus S.) batch fecundity. 2009. Poster session presented at ICES/PICES/UNCOVER Symposium 2009 on Rebuilding Depleted Fish Stocks, Warnemünde/Rostock, Germany.