Reproduction volume of Baltic cod in the Bornholm Basin estimated from single point measurements.

Hinrichsen, Hans-Harald and Wieland, Kai (1996) Reproduction volume of Baltic cod in the Bornholm Basin estimated from single point measurements. Open Access [Paper] In: ICES Council Meeting 1996. , 27.9.-04.10.1996, Reykjavik, Iceland . ICES Council Meeting Papers, C+J:7 .

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Abstract

Estimates of the reproduetion volume of Baltic eod defined as the. total volume of water with salinity above 11 psu, oxygen coneentration above 2 mIlI and temperature above 1.5 °c are presented for the Bornholm Basin based on quasi-synoptie hydrographie surveys. The primary data set consisted of hydrographie observations recorded during 14 eruises in the period from 1991 to 1996 eovering a regular grid of 36 stations with a spacing of appr. 10 nm. This data set was supplemented by including two additional surveys from 1989 with 21 stations. A
statistical method the objective analysis was applied to mup the horizontal distribution of the thickness of the spawning layer. Subsequently, the reproduetion volume was ealculated by basiri wide integration. Highly significant eorrelations (r ~ 0.89, p < 0.001) betwcen single point observations of the thickness of the spawning layer and the overall reproduetion volume in the Bornholm Basin was found for 4 stations loeated in the eentral part of the surveyed urea.
Linear regression models for single stations and the basin wide reproduction volume were established representing different hydrographie scenarios from stagnation to inflow periods.
The results are discussed with respect to a backward extension of the time series using historical single point observations.

Document Type: Conference or Workshop Item (Paper)
Research affiliation: OceanRep > Leibniz-Institut für Meereswissenschaften
Refereed: No
Date Deposited: 18 Feb 2008 17:23
Last Modified: 06 May 2020 09:26
URI: https://oceanrep.geomar.de/id/eprint/6245

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