publication . Report . 2007

Is the endemic Maltese Top-shell Gibbula nivosa extinct?

Schembri, Patrick J.; Borg, Joseph A.; Deidun, Alan; Knittweis, Leyla; Mellado Lopez, T.;
Open Access English
  • Published: 01 Jan 2007
  • Publisher: La Commission Internationale pour l'Exploration Scientifique de la Mer Méditerranée
  • Country: Malta
Abstract
The trochid gastropod Gibbula nivosa, endemic to the Maltese Islands, has recently only been found in two Maltese bays, where it occurred on seagrass leaves and under stones at depths of 1-4m. Intensive sampling of Cymodocea nodosa and Posidonia oceanica meadows, sediment and pebbles at depths of 2-12m, carried out in 2000 and 2002, resulted only in empty shells but no live animals, suggesting that the species is extinct from these localities where previously good populations were found. However, the occurrence of fresh shells from other Maltese sites suggests that small undiscovered populations may exist. G.nivosa is considered to be ’critically endangered’.
Subjects
free text keywords: Gastropoda -- Malta, Trochidae -- Malta, Endangered species -- Malta, Marine habitat conservation -- Malta
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Report . 2007
Provider: OAR@UM
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