Die Entwicklung des eulitoralen Miesmuschelbestandes (Mytilus edulis) in den deutschen Wattgebieten. (Development of intertidal blue mussel stocks (Mytilus edulis) in the German tidal flats)

The decrease of mussel stocks in the tidal flats of Lower Saxony in the 1980s and 1990s and in Schleswig-Holstein since the early 1990s was not reversed by a strong spatfall in spring 1996. The decrease was only interrupted and delayed. Mussel fisheries in Schleswig-Holstein and Lower Saxony have be...

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Main Authors: Millat, Gerald, Borchardt, Thomas, Bartsch, Inka, Adolph, Winny, Herlyn, Marc, Reichert, Katharina, Kuhlenkamp, Ralph, Schubert, Philipp
Format: Article in Journal/Newspaper
Language:unknown
Published: Bundesamt für Seeschifffahrt und Hydrographie (BSH) 2012
Subjects:
Online Access:https://epic.awi.de/id/eprint/30310/
https://epic.awi.de/id/eprint/30310/1/2012_02_d.pdf
http://www.blmp-online.de/PDF/Indikatorberichte/2012_02_d.pdf
https://hdl.handle.net/10013/epic.39208
https://hdl.handle.net/10013/epic.39208.d001
id ftawi:oai:epic.awi.de:30310
record_format openpolar
spelling ftawi:oai:epic.awi.de:30310 2023-05-15T17:54:22+02:00 Die Entwicklung des eulitoralen Miesmuschelbestandes (Mytilus edulis) in den deutschen Wattgebieten. (Development of intertidal blue mussel stocks (Mytilus edulis) in the German tidal flats) Millat, Gerald Borchardt, Thomas Bartsch, Inka Adolph, Winny Herlyn, Marc Reichert, Katharina Kuhlenkamp, Ralph Schubert, Philipp 2012-02 application/pdf https://epic.awi.de/id/eprint/30310/ https://epic.awi.de/id/eprint/30310/1/2012_02_d.pdf http://www.blmp-online.de/PDF/Indikatorberichte/2012_02_d.pdf https://hdl.handle.net/10013/epic.39208 https://hdl.handle.net/10013/epic.39208.d001 unknown Bundesamt für Seeschifffahrt und Hydrographie (BSH) https://epic.awi.de/id/eprint/30310/1/2012_02_d.pdf https://hdl.handle.net/10013/epic.39208.d001 Millat, G. , Borchardt, T. , Bartsch, I. orcid:0000-0001-7609-2149 , Adolph, W. , Herlyn, M. , Reichert, K. orcid:0000-0001-9595-7443 , Kuhlenkamp, R. and Schubert, P. (2012) Die Entwicklung des eulitoralen Miesmuschelbestandes (Mytilus edulis) in den deutschen Wattgebieten. (Development of intertidal blue mussel stocks (Mytilus edulis) in the German tidal flats) , Meeresumwelt Aktuell Nord- und Ostsee, 2012 / , pp. 1-12 . hdl:10013/epic.39208 EPIC3Meeresumwelt Aktuell Nord- und Ostsee, Bundesamt für Seeschifffahrt und Hydrographie (BSH), 2012 /, pp. 1-12, ISSN: 1867-8874 Article notRev 2012 ftawi 2021-12-24T15:37:41Z The decrease of mussel stocks in the tidal flats of Lower Saxony in the 1980s and 1990s and in Schleswig-Holstein since the early 1990s was not reversed by a strong spatfall in spring 1996. The decrease was only interrupted and delayed. Mussel fisheries in Schleswig-Holstein and Lower Saxony have been subject to a fishery programme and management plan since 1997 and 1999 respectively. These measures are accompanied by monitoring of intertidal mussel stocks. Monitoring in Lower Saxony showed that blue mussel areas and biomass reached their all-time minimum level in the spring of 1996. After the inventory in spring, a strong spatfall took place which led to the largest growth of mussel stocks in 1999. Following several years with a negative trend, mussel stocks have levelled off at a low level for 7 years. But for the past 5 years, there has been a positive trend in biomass. Mussel stocks in the Wadden Sea area of Schleswig-Holstein remained at an average level until 2001. Values then fell to one fifth of their former maximum values (recorded at the end of the 1980s) and, with 1/10 in 2010, dropped to their lowest level since the beginning of monitoring. Mussel stocks have not recovered so far. The shrinking of mussel bed area and biomass is superimposed by the spread of the Pacific oyster; there has been no general regeneration of blue mussel stocks. Between 1980 and 2000, a small but persistent mussel stock existed in the rocky northern intertidal of the island of Helgoland, which is part of Schleswig Holstein, but data from this period is incomplete. Since 2005/2006 the number of recorded individuals in the monitoring area decreased to only approx. 3% in summer 2011 compared to maximum values in 2005/2006. As blue mussel stocks in the „Hamburgisches Wattenmeer” national park are not monitored continuously (pers. comm. Peter Körber), only information about mussel stocks in Lower Saxony and Schleswig-Holstein is presented. Article in Journal/Newspaper Pacific oyster Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Helgoland Pacific
institution Open Polar
collection Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
op_collection_id ftawi
language unknown
description The decrease of mussel stocks in the tidal flats of Lower Saxony in the 1980s and 1990s and in Schleswig-Holstein since the early 1990s was not reversed by a strong spatfall in spring 1996. The decrease was only interrupted and delayed. Mussel fisheries in Schleswig-Holstein and Lower Saxony have been subject to a fishery programme and management plan since 1997 and 1999 respectively. These measures are accompanied by monitoring of intertidal mussel stocks. Monitoring in Lower Saxony showed that blue mussel areas and biomass reached their all-time minimum level in the spring of 1996. After the inventory in spring, a strong spatfall took place which led to the largest growth of mussel stocks in 1999. Following several years with a negative trend, mussel stocks have levelled off at a low level for 7 years. But for the past 5 years, there has been a positive trend in biomass. Mussel stocks in the Wadden Sea area of Schleswig-Holstein remained at an average level until 2001. Values then fell to one fifth of their former maximum values (recorded at the end of the 1980s) and, with 1/10 in 2010, dropped to their lowest level since the beginning of monitoring. Mussel stocks have not recovered so far. The shrinking of mussel bed area and biomass is superimposed by the spread of the Pacific oyster; there has been no general regeneration of blue mussel stocks. Between 1980 and 2000, a small but persistent mussel stock existed in the rocky northern intertidal of the island of Helgoland, which is part of Schleswig Holstein, but data from this period is incomplete. Since 2005/2006 the number of recorded individuals in the monitoring area decreased to only approx. 3% in summer 2011 compared to maximum values in 2005/2006. As blue mussel stocks in the „Hamburgisches Wattenmeer” national park are not monitored continuously (pers. comm. Peter Körber), only information about mussel stocks in Lower Saxony and Schleswig-Holstein is presented.
format Article in Journal/Newspaper
author Millat, Gerald
Borchardt, Thomas
Bartsch, Inka
Adolph, Winny
Herlyn, Marc
Reichert, Katharina
Kuhlenkamp, Ralph
Schubert, Philipp
spellingShingle Millat, Gerald
Borchardt, Thomas
Bartsch, Inka
Adolph, Winny
Herlyn, Marc
Reichert, Katharina
Kuhlenkamp, Ralph
Schubert, Philipp
Die Entwicklung des eulitoralen Miesmuschelbestandes (Mytilus edulis) in den deutschen Wattgebieten. (Development of intertidal blue mussel stocks (Mytilus edulis) in the German tidal flats)
author_facet Millat, Gerald
Borchardt, Thomas
Bartsch, Inka
Adolph, Winny
Herlyn, Marc
Reichert, Katharina
Kuhlenkamp, Ralph
Schubert, Philipp
author_sort Millat, Gerald
title Die Entwicklung des eulitoralen Miesmuschelbestandes (Mytilus edulis) in den deutschen Wattgebieten. (Development of intertidal blue mussel stocks (Mytilus edulis) in the German tidal flats)
title_short Die Entwicklung des eulitoralen Miesmuschelbestandes (Mytilus edulis) in den deutschen Wattgebieten. (Development of intertidal blue mussel stocks (Mytilus edulis) in the German tidal flats)
title_full Die Entwicklung des eulitoralen Miesmuschelbestandes (Mytilus edulis) in den deutschen Wattgebieten. (Development of intertidal blue mussel stocks (Mytilus edulis) in the German tidal flats)
title_fullStr Die Entwicklung des eulitoralen Miesmuschelbestandes (Mytilus edulis) in den deutschen Wattgebieten. (Development of intertidal blue mussel stocks (Mytilus edulis) in the German tidal flats)
title_full_unstemmed Die Entwicklung des eulitoralen Miesmuschelbestandes (Mytilus edulis) in den deutschen Wattgebieten. (Development of intertidal blue mussel stocks (Mytilus edulis) in the German tidal flats)
title_sort die entwicklung des eulitoralen miesmuschelbestandes (mytilus edulis) in den deutschen wattgebieten. (development of intertidal blue mussel stocks (mytilus edulis) in the german tidal flats)
publisher Bundesamt für Seeschifffahrt und Hydrographie (BSH)
publishDate 2012
url https://epic.awi.de/id/eprint/30310/
https://epic.awi.de/id/eprint/30310/1/2012_02_d.pdf
http://www.blmp-online.de/PDF/Indikatorberichte/2012_02_d.pdf
https://hdl.handle.net/10013/epic.39208
https://hdl.handle.net/10013/epic.39208.d001
geographic Helgoland
Pacific
geographic_facet Helgoland
Pacific
genre Pacific oyster
genre_facet Pacific oyster
op_source EPIC3Meeresumwelt Aktuell Nord- und Ostsee, Bundesamt für Seeschifffahrt und Hydrographie (BSH), 2012 /, pp. 1-12, ISSN: 1867-8874
op_relation https://epic.awi.de/id/eprint/30310/1/2012_02_d.pdf
https://hdl.handle.net/10013/epic.39208.d001
Millat, G. , Borchardt, T. , Bartsch, I. orcid:0000-0001-7609-2149 , Adolph, W. , Herlyn, M. , Reichert, K. orcid:0000-0001-9595-7443 , Kuhlenkamp, R. and Schubert, P. (2012) Die Entwicklung des eulitoralen Miesmuschelbestandes (Mytilus edulis) in den deutschen Wattgebieten. (Development of intertidal blue mussel stocks (Mytilus edulis) in the German tidal flats) , Meeresumwelt Aktuell Nord- und Ostsee, 2012 / , pp. 1-12 . hdl:10013/epic.39208
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