The decline of important coastal habitats, like seagrass meadows, is likely to influence populations of associated species, like the noble pen shell, Pinna nobilis. Here we used a Bayesian formulation of individual covariate models to derive a reliable estimate of populations of P. nobilis in shallow, and thus usually most impacted, areas around the island of Majorca, Balearic Islands, Spain. At six evaluated sites we find quite distinct densities ranging from 1.4 to 10.0 individuals/100m2. These differences in density could not be explained by habitat factors like shoot density and meadow cover, nor did dislodgement by storms (evaluated by maximum wind speeds at the sites) seem to play an important role. However, noble pen shell density was related to anchoring as at sites where anchoring was not permitted the average density was 7.9 individuals/100m2 while in sites where ships anchored the density was on average 1.7 individuals/100m2. As for the conservation of Posidonia oceanica meadows, for the associated population of P. nobilis it would be of utmost importance to reduce anchoring pressure as a conservation measure for these endangered and protected bivalves. © 2013 Elsevier Ltd.

Hendriks, I.E.;Tenan, S.;Tavecchia, G.;Marb{\`a}, N.;Jord{\`a}, G.;Deudero, S.;{\'A}lvarez, E.;Duarte, C.M. (2013). Boat anchoring impacts coastal populations of the pen shell, The largest bivalve in the Mediterranean., 160: 105-113. doi: doi:10.1016/j.biocon.2013.01.012 handle: http://www.scopus.com/inward/record.url?eid=2-s2.0-84874474329&partnerID=40&md5=7611e7502fe368c0551453001647fc92

Boat anchoring impacts coastal populations of the pen shell, The largest bivalve in the Mediterranean

TENAN, SIMONE;
2013-01-01

Abstract

The decline of important coastal habitats, like seagrass meadows, is likely to influence populations of associated species, like the noble pen shell, Pinna nobilis. Here we used a Bayesian formulation of individual covariate models to derive a reliable estimate of populations of P. nobilis in shallow, and thus usually most impacted, areas around the island of Majorca, Balearic Islands, Spain. At six evaluated sites we find quite distinct densities ranging from 1.4 to 10.0 individuals/100m2. These differences in density could not be explained by habitat factors like shoot density and meadow cover, nor did dislodgement by storms (evaluated by maximum wind speeds at the sites) seem to play an important role. However, noble pen shell density was related to anchoring as at sites where anchoring was not permitted the average density was 7.9 individuals/100m2 while in sites where ships anchored the density was on average 1.7 individuals/100m2. As for the conservation of Posidonia oceanica meadows, for the associated population of P. nobilis it would be of utmost importance to reduce anchoring pressure as a conservation measure for these endangered and protected bivalves. © 2013 Elsevier Ltd.
Zoologia dei Vertebrati
articolo in rivista
2013
pubblicato
160
105
113
Si
con Impact Factor
si
Hendriks, I.E.;Tenan, S.;Tavecchia, G.;Marb{\`a}, N.;Jord{\`a}, G.;Deudero, S.;{\'A}lvarez, E.;Duarte, C.M.
Hendriks, I.E.;Tenan, S.;Tavecchia, G.;Marb{\`a}, N.;Jord{\`a}, G.;Deudero, S.;{\'A}lvarez, E.;Duarte, C.M. (2013). Boat anchoring impacts coastal populations of the pen shell, The largest bivalve in the Mediterranean., 160: 105-113. doi: doi:10.1016/j.biocon.2013.01.012 handle: http://www.scopus.com/inward/record.url?eid=2-s2.0-84874474329&partnerID=40&md5=7611e7502fe368c0551453001647fc92
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10991/608
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