To follow the idea of multi-use of sites and support the co-existence of mussel
cultivation off the coast in severe conditions where wind farms occur the attachment and
detachment of mussels and their byssus threats from their holding devices were tested
(Figs. 11.9a–c, 11.10 and 11.11a–m). Collector types for larval settlement attraction,
good foothold and interweaving abilities, or collectors combining these properties
should be developed and applied depending on the use for seed mussel collection or
grow-out as well as for a one-step or a two-step (including thinning) cultivation method.
Due to the harsh conditions in the open ocean collector surfaces should be precisely
tailored to avoid loss of mussels. It may happen that not only one collector type for all
purposes is the solution. Changing collector surfaces according to the prevailing conditions (current velocity, waves, size of the mussel, etc.) may be most beneficial.
Use of fouling organisms originating from foundations: In Project
No. 14 “NutriMat” the use of harvested Mytilus edulis, originally settling in vast
amounts on the foundations of offshore wind farms, was investigated (Weiss et al.
2012). The removal of fouling organisms at regular intervals due to regulated
Fig. 11.7 a Shows the map indicating the stations where offshore test installations were moored;
b displays the concentration of mussel larvae in the water column at the respective site and
c represents the number of mussels settling on ropes (Buck 2017)
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B.H. Buck et al.
cultivation off the coast in severe conditions where wind farms occur the attachment and
detachment of mussels and their byssus threats from their holding devices were tested
(Figs. 11.9a–c, 11.10 and 11.11a–m). Collector types for larval settlement attraction,
good foothold and interweaving abilities, or collectors combining these properties
should be developed and applied depending on the use for seed mussel collection or
grow-out as well as for a one-step or a two-step (including thinning) cultivation method.
Due to the harsh conditions in the open ocean collector surfaces should be precisely
tailored to avoid loss of mussels. It may happen that not only one collector type for all
purposes is the solution. Changing collector surfaces according to the prevailing conditions (current velocity, waves, size of the mussel, etc.) may be most beneficial.
Use of fouling organisms originating from foundations: In Project
No. 14 “NutriMat” the use of harvested Mytilus edulis, originally settling in vast
amounts on the foundations of offshore wind farms, was investigated (Weiss et al.
2012). The removal of fouling organisms at regular intervals due to regulated
Fig. 11.7 a Shows the map indicating the stations where offshore test installations were moored;
b displays the concentration of mussel larvae in the water column at the respective site and
c represents the number of mussels settling on ropes (Buck 2017)
268
B.H. Buck et al.