| 1. |
- Bers, A. V., et al.
(författare)
-
A comparative study of the anti-settlement properties of mytilid shells
- 2006
-
Ingår i: Biology Letters. - 1744-9561. ; 2:1, s. 88-91
-
Tidskriftsartikel (refereegranskat)abstract
- Marine organisms have evolved defence mechanisms to prevent epibiosis. This study investigated the anti-settlement properties of natural periostracal microtopographies of two mytilid species, Mytilus edulis (from North, Baltic and White Seas) and Perna perna (from the SW Atlantic). Resin replicas of shells were exposed to cyprids of the barnacle Semibalanus balanoides. Replicas with intact isotropic microtopographies and smooth controls were much less fouled than roughened anisotropic surfaces. This indicates that in both M. edulis and P. perna the periostracum possesses a generic anti-settlement property, at least against S. balanoides cyprids, which is not regionally adapted. Such a potential globally effective anti-settlement mechanism possibly contributes to the invasive success of Mytilidae.
|
|
| 2. |
- Prendergast, G. S., et al.
(författare)
-
Field-based video observations of wild barnacle cyprid behaviour in response to textural and chemical settlement cues
- 2008
-
Ingår i: Biofouling. - 0892-7014. ; 24:6, s. 449-459
-
Tidskriftsartikel (refereegranskat)abstract
- Many marine invertebrate larvae respond behaviourally to environmental settlement cues, yet behaviours are often only inferred from settlement patterns or are limited to laboratory studies. The behaviour of wild cypris larvae of Semibalanus balanoides L. was filmed on settlement tiles in the field. Tiles were of five different textures with a nested treatment of crude conspecific adult extract (AE). The effects of texture and AE on eleven defined behaviours were analysed. Texture affected the gross and net exploratory distances, velocity, acceleration and time spent exploring. AE attracted more cyprids during the first minute of immersion and increased the time spent on surfaces. Relatively few arrivals that either travel far and fast, or exit the surface rapidly, may indicate a lower chance of settlement. An increase in time spent on a surface may increase the probability of being in contact with the surface when the sign stimulus to settle occurs.
|
|
