En el marco de dos campos de trabajo (2006 y 2007) financiados por
el Patronato Municipal de Juventud del Ayuntamiento de Tarifa y el Instituto
Andaluz de la Juventud respectivamente, se estudiaron cinco especies intermareales
amenazadas del Parque Natural del Estrecho: Patella ferruginea Gmelin,
1791, Cymbula nigra (Da Costa, 1771), Dendropoma petraeum (Monterosato,
1884) Charonia lampas lampas (Linnaeus, 1758) y Astroides calycularis (Pallas,
1776). Se seleccionaron 8 estaciones, y en cada estación se realizaron 4
transectos de 100 m de longitud paralelos a la costa. Se registraron un total
de 211 ejemplares de C. nigra (5,3±1,6 cm) y 100 ejemplares de P. ferruginea
(4,1±1,3 cm). Destacó la presencia de un ejemplar de P. ferruginea en Punta
Camarinal, representando la cita más occidental para la especie encontrada
hasta el momento. C. nigra y P. ferruginea mostraron mayores densidades en
la zona oriental del Parque mientras que D. petraeum fue más abundante en la.In the framework of the labour camps (2006 and 2007) supported by the
“Patronato Municipal de Juventud del Ayuntamiento de Tarifa” and the “Instituto
Andaluz de la Juventud” respectively, five intertidal endangered species
from “The Straits Natural Park” were studied: Patella ferruginea Gmelin, 1791,
Cymbula nigra (Da Costa, 1771), Dendropoma petraeum (Monterosato, 1884)
Charonia lampas (Linnaeus, 1758), Astroides calycularis (Pallas, 1776). Eight
stations were selected, and 4 transects of 100 m were disposed parallel to the
coastline. A total of 211 specimens of C. nigra (5,3±1,6 cm) and 100 specimens
of P. ferruginea (4,1±1,3 cm) were registered. A specimen of P. ferruginea was
collected from Punta Camarinal, representing the most occidental record of the
species so far. C. nigra and P. ferruginea showed the highest densities in the
oriental zone of the Natural Park, whereas D. petraeum was more abundant in
the occidental sites. When a qualitative evaluation of the stations was conducted
based on the relative abundance of species, Guadalmesí (with 17 points of 20)
showed the highest interest, with high abundances of the 5 species. Tarifa Island
(with 13 points) was also remarkable. Regarding with the limpet populations
of P. ferruginea and C. nigra, San García was especially interesting, showing
high densities of both species. The qualitative assessment of “The Strait Natural
Park” conducted in the present study should be considered by the authorities
to properly address future management and conservation estrategie
