20 years of the German Small-Scale Bottom Trawl Survey (GSBTS): A review

20 years of the German Small-Scale Bottom Trawl Survey (GSBTS): A review

Ehrich, Siegfried ... et. al.-- 70 pages, 50 figures, 18 tables, 1 appendix

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Bibliographic Details
Main Authors: Ehrich, Siegfried, Stelzenmüller, Vanessa, Zauke, Gerd-Peter
Format: artículo biblioteca
Published: Senckenbergische Naturforschende Gesellschaft 2007-03
Subjects:North Sea, IBTS, Survey design, Scale, Sampling method, Fish assemblages, Predator-prey interactions, Geostatistics, Benthos, Seabirds, Nutrients, Hydrography, Temporal variation,
Online Access:http://hdl.handle.net/10261/107743
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id dig-icm-es-10261-107743
record_format koha
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
topic North Sea
IBTS
Survey design
Scale
Sampling method
Fish assemblages
Predator-prey interactions
Geostatistics
Benthos
Seabirds
Nutrients
Hydrography
Temporal variation
North Sea
IBTS
Survey design
Scale
Sampling method
Fish assemblages
Predator-prey interactions
Geostatistics
Benthos
Seabirds
Nutrients
Hydrography
Temporal variation
spellingShingle North Sea
IBTS
Survey design
Scale
Sampling method
Fish assemblages
Predator-prey interactions
Geostatistics
Benthos
Seabirds
Nutrients
Hydrography
Temporal variation
North Sea
IBTS
Survey design
Scale
Sampling method
Fish assemblages
Predator-prey interactions
Geostatistics
Benthos
Seabirds
Nutrients
Hydrography
Temporal variation
Ehrich, Siegfried
Stelzenmüller, Vanessa
Zauke, Gerd-Peter
20 years of the German Small-Scale Bottom Trawl Survey (GSBTS): A review
description Ehrich, Siegfried ... et. al.-- 70 pages, 50 figures, 18 tables, 1 appendix
format artículo
topic_facet North Sea
IBTS
Survey design
Scale
Sampling method
Fish assemblages
Predator-prey interactions
Geostatistics
Benthos
Seabirds
Nutrients
Hydrography
Temporal variation
author Ehrich, Siegfried
Stelzenmüller, Vanessa
Zauke, Gerd-Peter
author_facet Ehrich, Siegfried
Stelzenmüller, Vanessa
Zauke, Gerd-Peter
author_sort Ehrich, Siegfried
title 20 years of the German Small-Scale Bottom Trawl Survey (GSBTS): A review
title_short 20 years of the German Small-Scale Bottom Trawl Survey (GSBTS): A review
title_full 20 years of the German Small-Scale Bottom Trawl Survey (GSBTS): A review
title_fullStr 20 years of the German Small-Scale Bottom Trawl Survey (GSBTS): A review
title_full_unstemmed 20 years of the German Small-Scale Bottom Trawl Survey (GSBTS): A review
title_sort 20 years of the german small-scale bottom trawl survey (gsbts): a review
publisher Senckenbergische Naturforschende Gesellschaft
publishDate 2007-03
url http://hdl.handle.net/10261/107743
work_keys_str_mv AT ehrichsiegfried 20yearsofthegermansmallscalebottomtrawlsurveygsbtsareview
AT stelzenmullervanessa 20yearsofthegermansmallscalebottomtrawlsurveygsbtsareview
AT zaukegerdpeter 20yearsofthegermansmallscalebottomtrawlsurveygsbtsareview
_version_ 1777666215680933888
spelling dig-icm-es-10261-1077432020-12-13T09:26:53Z 20 years of the German Small-Scale Bottom Trawl Survey (GSBTS): A review Ehrich, Siegfried Stelzenmüller, Vanessa Zauke, Gerd-Peter North Sea IBTS Survey design Scale Sampling method Fish assemblages Predator-prey interactions Geostatistics Benthos Seabirds Nutrients Hydrography Temporal variation Ehrich, Siegfried ... et. al.-- 70 pages, 50 figures, 18 tables, 1 appendix The German Small-scale Bottom Trawl Survey (GSBTS) was initiated in 1987 in order to provide complementary investigations to the International Bottom Trawl Survey (IBTS) in the North Sea, using the same methodology but focussing high-intensity sampling on selected survey areas. Over the last 20 years, the initial number of 4 survey areas (10 × 10 nautical miles; >Boxes>) has been increased to 12, which are distributed over the entire North Sea. This paper describes the survey methods of the GSBTS, summarizes the scientific outcome of the first 20 years, and suggests that international fisheries research institutions would join the GSBTS. The major outcomes of the survey include to date: - Documentation changes in the distribution of fish species and in species assemblages (e.g. changes in species richness, shifts in the southern species component). - Geostatistical evaluation of GSBTS data. - Analysis of spatial scale effects: the relevance of GSBTS survey results for interpreting large-scaled abundance and distribution data from the IBTS. - Description of benthic habitats, composition of invertebrate fauna and its variability. - Process studies, especially investigation of predator-prey interactions between fish through analyses of stomach contents. - Characterization of the typical hydrographic conditions in the survey areas and their variability, and description of the nutrient supply. - Observations of seabirds and their feeding habits. - Analysis of the effects of different parameters on catch rates for bottom fish and on the estimates of abundance indices (e.g. vessel and gear effects, towing time, hydrographic conditions, time of day, number of hauls per area). In continuing this interdisciplinary survey with simultaneous sampling of all faunal and environmental compartments and especially in making it an international effort, we see the possibility of contributing data for the implementation of the ecosystems approach to fisheries management. Particularly, the following aspects can be addressed and would further increase the scientific value of the GSBTS: - Combining the survey data with highly resolved data from the commercial fishery to separate the effects of fishing from natural variability. - Further interdisciplinary analyses of the entire data set. Main aspects include benthos-fish-bird-community changes over time and their relation to historic fisheries impacts, and the coupling of biological and physical habitat characterisation. - Collection of accompanying data (phyto-, zoo- and ichthyoplankton data) in order to make the GSBTS a true ecosystem survey in detecting temporal changes in nearly all major levels of the food web. © E. Schweizerbart'sche Verlagsbuchhandlung (Nägele u. Obermiller), 2007 The writing of sections >Predator-prey interactions fish-fisch> and >Analysing predator-prey interactions at large and small scales', was financed by the EU project >BECAUSE - critical interactions between species and their implications fora precautionary fisheries management in a variable environment - a modelling approach> (EU FP6 TP8.1 502482). The evaluation of the data series presented in section >Effects of different parameters on the catch>, p. 33>, was supported by the European Commission (DG XIV) under project contract 98/029 (Surveybased abundance Ÿ that account for fine scale information for North Sea stocks - FINE). External funding of the seabird work was obtained from the European Commission (EC DG XIV: 92/3505; BIOECO/93110), the Federal Agency for Nature Conservation (FKZ 808 05 086 and FKZ 802 85 280 - K 1) and the Verein der Freunde und FSrder der Inselstation der Vogelwarte Helgoland e.V. Peer Reviewed 2014-11-19T09:22:09Z 2014-11-19T09:22:09Z 2007-03 2014-11-19T09:22:09Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1007/BF03043206 issn: 0080-889X Senckenbergiana Maritima 37(1): 13-82 (2007) http://hdl.handle.net/10261/107743 10.1007/BF03043206 https://doi.org/10.1007/BF03043206 none Senckenbergische Naturforschende Gesellschaft

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