Identifying the larva of the fan mussel, Atrina fragilis (Pennant, 1777) (Pinnidae)

David A Stirling (Corresponding Author), Philip Boulcott, Mathias Bidault, Karim Gharbi, Beth E Scott, Peter J Wright

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Abstract

Measuring dispersal in rare sessile benthic species is important in the development of conservation measures such as MPA networks. However, efforts to understand dispersal dynamics for many species of conservation concern are hampered by a lack of fundamental life-history information. Here we present the first description of larvae of the fan mussel, Atrina fragilis, and examine key life-history traits that affect dispersal. Larval identification was accomplished using complementary molecular and morphologic techniques. Atrina-specific primers were designed by aligning Atrina COI sequences available in GenBank. As none of these were from UK specimens, primers were designed in the most conserved regions found across A. fragilis and its closest relative A. chautardi. A monthly time-series of zooplankton samples (2014–2015) suggests that A. fragilis follows the same pattern in spawning observed for other pinnids at temperate latitudes, with peak spawning in summer and winter. Average shell growth was estimated to be 6 μm d–1 based on presumed daily growth lines on larval shells. Measurements of the larval shell visible through the juvenile shell indicate a length of up to 770 μm at settlement. Using presumed daily growth lines, this translates into a pelagic larval duration of around 4 months.
Original languageEnglish
Pages (from-to)247-258
Number of pages12
JournalJournal of Molluscan Studies
Volume84
Issue number3
Early online date22 May 2018
DOIs
Publication statusPublished - Aug 2018

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Pinnidae
Atrina
shell (molluscs)
mussels
shell
larva
larvae
spawning
life history
life history trait
time series analysis
zooplankton
time series
duration
winter
summer

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Identifying the larva of the fan mussel, Atrina fragilis (Pennant, 1777) (Pinnidae). / Stirling, David A (Corresponding Author); Boulcott, Philip; Bidault, Mathias; Gharbi, Karim; Scott, Beth E; Wright, Peter J.

In: Journal of Molluscan Studies, Vol. 84, No. 3, 08.2018, p. 247-258.

Research output: Contribution to journalArticle

Stirling, David A ; Boulcott, Philip ; Bidault, Mathias ; Gharbi, Karim ; Scott, Beth E ; Wright, Peter J. / Identifying the larva of the fan mussel, Atrina fragilis (Pennant, 1777) (Pinnidae). In: Journal of Molluscan Studies. 2018 ; Vol. 84, No. 3. pp. 247-258.
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