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dc.contributor.authorBaumgarten, Sebastian
dc.contributor.authorLaudien, Jürgen
dc.contributor.authorJantzen, Carin
dc.contributor.authorHäussermann, Verena
dc.contributor.authorFörsterra, Günter
dc.date.accessioned2015-08-03T11:36:46Z
dc.date.available2015-08-03T11:36:46Z
dc.date.issued2013-12-04
dc.identifier.citationBaumgarten, S., Laudien, J., Jantzen, C., Häussermann, V., & Försterra, G. (2013). Population structure, growth and production of a recent brachiopod from the Chilean fjord region. Marine Ecology, 35(4), 401–413. doi:10.1111/maec.12097
dc.identifier.issn01739565
dc.identifier.doi10.1111/maec.12097
dc.identifier.urihttp://hdl.handle.net/10754/563142
dc.description.abstractMagellania venosa, the largest recent brachiopod, occurs in clusters and banks in population densities of up to 416 ind m-2 in Comau Fjord, Northern Chilean fjord region. Below 15 m, it co-occurs with the mytilid Aulacomya atra and it dominates the benthic community below 20 m. To determine the question of why M. venosa is a successful competitor, the in situ growth rate of the brachiopod was studied and its overall growth performance compared with that of other brachiopods and mussels. The growth in length was measured between February 2011 and March 2012 after mechanical tagging and calcein staining. Settlement and juvenile growth were determined from recruitment tiles installed in 2009 and from subsequent photocensus. Growth of M. venosa is best described by the general von Bertalanffy growth function, with a maximum shell length (L∞) of 71.53 mm and a Brody growth constant (K) of 0.336 year-1. The overall growth performance (OGP index = 5.1) is the highest recorded for a rynchonelliform brachiopod and in the range of that for Mytilus chilensis (4.8-5.27), but lower than that of A. atra (5.74). The maximal individual production (PInd) is 0.29 g AFDM ind-1 year-1 at 42 mm shell length and annual production ranges from 1.28 to 89.25 g AFDM year-1 m-2 (1-57% of that of A. atra in the respective fjords). The high shell growth rate of M. venosa, together with its high overall growth performance may explain the locally high population density of this brachiopod in Comau Fjord. However, the production per biomass of the population (P/B--ratio) is low (0.535) and M. venosa may play only a minor role in the food chain. Settling dynamics indicates that M. venosa is a pioneer species with low juvenile mortality. The coexistence of the brachiopod and bivalve suggests that brachiopod survival is affected by neither the presence of potential brachiopod predators nor that of space competitors (i.e. mytilids).
dc.publisherWiley
dc.relation.isreferencedbyBaumgarten, S., & Laudien, J. (2013). Growth increments of the recent brachiopod Magellania venosa mechanically marked in the Paso Comau, Chile, at station Liliguapi, 2011/2012 [Data set]. PANGAEA - Data Publisher for Earth & Environmental Science. https://doi.org/10.1594/pangaea.783378
dc.relation.isreferencedbyDOI:10.1594/PANGAEA.783378
dc.relation.isreferencedbyHANDLE:http://hdl.handle.net/10754/624152
dc.subjectMagellania venosa
dc.subjectBrachiopoda
dc.subjectChilean Patagonia
dc.subjectComau Fjord
dc.subjectGrowth function
dc.subjectGrowth performance
dc.subjectProductivity
dc.subjectZonation
dc.titlePopulation structure, growth and production of a recent brachiopod from the Chilean fjord region
dc.typeArticle
dc.contributor.departmentRed Sea Research Center (RSRC)
dc.contributor.departmentMarine Science Program
dc.identifier.journalMarine Ecology
dc.contributor.institutionAlfred Wegener Institute, Helmholtz Centre for Polar and Marine ResearchBremerhaven, Germany
dc.contributor.institutionPontificia Universidad Católica de Valparaíso, Facultad de Recursos Naturales, Escuela de Ciencias del MarValparaíso, Chile
dc.contributor.institutionHuinay Scientific Field StationHuinay, Chile
kaust.personBaumgarten, Sebastian
dc.relation.issupplementedbyDOI:10.1594/PANGAEA.845997
display.relations<b> Is Supplemented By:</b> <br/> <ul><li><i>[Dataset]</i> <br/> Baumgarten, S., Laudien, J., Jantzen, C., Häussermann, V., & Försterra, G. (2015). Growth increments of the recent brachiopod Magellania venosa mechanically marked in Paso Comau and Comau Fjord, Chile, 2011/2012, supplement to: Baumgarten, Sebastian; Laudien, Jürgen; Jantzen, Carin; Häussermann, Verena; Försterra, Günter (2013): Population structure, growth and production of a recent brachiopod from the Chilean fjord region. Marine Ecology, 35(4), 401-413. PANGAEA - Data Publisher for Earth & Environmental Science. https://doi.org/10.1594/pangaea.845997. DOI: <a href="https://doi.org/10.1594/PANGAEA.845997">10.1594/PANGAEA.845997</a> HANDLE: <a href="http://hdl.handle.net/10754/624120">10754/624120</a></li></ul>
dc.date.published-online2013-12-04
dc.date.published-print2014-12


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