But even though it is the main one, it is a population with a very low density. They also do not reach quite large sizes if you compare them with the African populations, in Ceuta, Melilla and the Chafarinas Islands, which are the three enclaves where important populations remain. The LIFE project consists of transferring specimens from a population of Melilla, which acts as a source population, to the bay of Algeciras. Successive waves of transfer have been planned until a fairly dense population in the bay has been configured. It is a program to reinforce this population, to avoid its extinction in the short or medium term. Q. In the project do you use 3D printing? For what purpose? A. What has been done is to digitize the microtopography of the area where limpets live in Melilla. Thus, it s and microtopography replicated experimental plates using 3D printing technology.

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With this, we want to facilitate that the Vanuatu Email List larvae attach to these structures, metamorphose and become small juvenile recruits that will be transferred together with the entire plate. Thus we avoid detaching them from the substrate since that causes greater stress to the animals. Other types of structures have been used for the plates, but it has been observed that the heterogeneity of the substrate at the microtopography level is important. Roughness, the presence of small indentations or cracks make the recruitment much higher, compared to a more or less smooth plate. With 3D printing, we want to replicate the microtopography that appears naturally in the places where limpets live , and thus maximize recruitment on these plates. Q. Where is LIFE REMoPaF at? A. During the first year, what we did above all was to develop the plates, in collaboration

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with Acciona Ingeniería. Anchoring tests were carried out, because they have to withstand 25 years. When we came up with the most optimal design, it was tested on-site to see if it would hold up. Last year the first batch of about 150 experimental plates were placed. This year we have already achieved initial recruitment and we have proceeded to the first transfer that we just completed recently. In October, the first experimental plates with Patella ferruginea specimens from the population of Melilla were placed in La Línea, which is the receiving site. Survival in transfer was 100%. The question now is to see how they will adapt to the new habitat and if mortality is not triggered in the medium term. If all goes well, next year we will carry out the transfer of another 500 plates that have already been placed in Melilla. Q.

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