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NorthCoast's Regional Information
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NATURESea, land, river ECONOMYRegional PLACEBooks+ PEOPLESCommunity |
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Semibalanus settles in almost pure colonies Grow extremely
fast – this will monitor over next month
Image left
doesn’t show the Semibalanus juveniles well but above is same site See last year
where seastars removed old growth Semibal |
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Limpets keep their areas cleared of
Semibalanus
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One of the
first things that catches ones attention is how some areas don’t have any
barnacles while others are densely packed Closer look
reveals inevitably one to many limpets |
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Limpets
Settled in April |
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See
last month where I begin to see the limpets aggregating in this (then)
cleared area Limpets
appear to keep their forage areas clear of Semibalanus – and superficially
both the limpets and the barnacles look to be all the same species and ‘age’
--- but closer look disproves this even aged hypothesis showing many sizes
implying settled over several weeks to a month for limpets |
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Limpets
appear all same species Just
different ages
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Note how
quickly the Semibalanus has diagnostic plates and beak – both magnified – the
marking to right is 1 mm on the ruler |
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Created by LG on
MAY/28/2005
Last updated on Saturday, May 28, 2005