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- Following associations with the striped red mullet Mullus surmuletus Linnaeus, 1758 (Perciformes: Mullidae) from the AzoresPublication . Soares, Marta S. C.; Barreiros, João P.In this study we report Mullus surmuletus being followed intraspecifically and by individual fish of the following species: Thalassoma pavo, Coris julis, Diplodus sargus cadenati and Serranus atricauda. This study was carried out over a total of some thirty-five hours between October 2001 and August 2002, in shallow water over sandy bottoms in the vicinity of the islands of Terceira and São Miguel, Azores (NE Atlantic). Red mullet search for benthic animals in the sand with their snout and barbells and feed on them. This behaviour attracts the attention of other species, which take advantage of the disturbance and capture prey themselves. Cleaning behaviour was also observed between M. surmuletus – "clients" and T. pavo and C. julis – "cleaners". This cleaning behaviour occurs when the "cleaners" follow the red mullet.
- Annual maturation of the perivaginal gland of Oxychilus (Drouetia) atlanticus (Pulmonata: Zonitidae): morphological and cytological approachesPublication . Rodrigues, Armindo; Martins, R.The family Zonitidae has a reproductive system, which is characterized by the presence of a perivaginal gland that, generally, surrounds the vaginal duct. The majority of works that make reference to this organ are taxonomic in nature, giving brief descriptions of the external shape of the gland and of its position in relation to other parts of the reproductive system. Rigby examined the histological structure of the perivaginal gland for the first time, studying the reproductive system of the zonitid Oxychilus cellarius (Müller). She reported that two types of glandular cells form this gland, without providing any structural or cytochemical characterization.