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ผู้เขียน หัวข้อ: Attachment properties of blue mussel (Mytilus edulis L.) byssus threads on cultu  (อ่าน 2588 ครั้ง)
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« เมื่อ: พฤษภาคม 05, 2010, 02:07:03 PM »

Attachment properties of blue mussel (Mytilus edulis L.) byssus threads on culture-based artificial collector substrates

M. Brennera, b, c     and B.H. Bucka, c, d


a Alfred Wegener Institute for Polar and Marine Research (AWI), Am Handelshafen 12, 27570 Bremerhaven, Germany

b Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany

c Institute for Marine Resourses (IMARE), Klußmannstraße 1, 27570 Bremerhaven, Germany

d University of Applied Sciences Bremerhaven, An der Karlstadt 8, 27568 Bremerhaven, Germany

Received 25 May 2009;  accepted 9 February 2010.  Available online 16 February 2010.

Abstract
The attachment strength of blue mussels (Mytilus edulis) growing under exposed conditions on 10 different artificial substrates was measured while assessing microstructure of the applied substrate materials. Fleece-like microstructure attracted especially mussel larvae, however, most settled individuals lost attachment on this type of microstructure with increasing size during the time of experiment. Substrates with thick filaments and long and fixed appendices were less attractive to larvae but provided a better foothold for juvenile mussels as shown by the results of the dislodgement trials. In addition these appendices of substrates could interweave with the mussels, building up a resistant mussel/substrate conglomerate. Our results show that a mussel byssus apparatus can withstand harsh conditions, if suitable substrates are deployed. Depending on cultivation aims (seed or market sized mussels) and cultivation method (one or two step cultivation), different collector types for larval attraction, good foothold and interweaving abilities or collectors combining these properties should be developed and applied. The study suggests that substrates need to be very precisely tailored according to the major environmental conditions. Furthermore, the results imply that a “one size fits all substrate” may not be the most culture-effective approach, but, in the contrary, substrates need to be changed and modified according to the size of the mussel as they go through their different life cycle stages.

Keywords: Spat collectors; Offshore aquaculture; Offshore wind farms; Mytilus edulis; Dislodgement

Aquacultural Engineering
Volume 42, Issue 3, May 2010, Pages 128-139
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