This study aimed to identify the incrusting and sedentary animals associated with the hull of a tugboat active in the ports of Pernambuco and later loaned to the port of Natal, Rio Grande do Norte. Thus, areas with dense biofouling were scraped and the species then classified in terms of their bioinvasive status for the Brazilian coast. Six were native to Brazil, two were cryptogenic and 16 non...

The barnacle Balanus amphitrite is a globally distributed marine crustacean and has been used as a model species for intertidal ecology and biofouling studies. Its life cycle consists of seven planktonic larval stages followed by a sessile juvenile/adult stage. The transitional processes between larval stages and juveniles are crucial for barnacle development and recruitment. Although some stud...

We determined the assimilation efficiencies (AEs) and efflux rate constants of Cd, Cr, and Se in barnacles Balanus amphitrite feeding on &verse planktonic prey. The measured AEs of Cd, Cr. and Se for zooplankton prey (brine shrimp Artemia salina larvae and copepods Canthocalanuspauper and Temora turbinata) were 53 to 88, 32 to 59, and 63 to 76%, respectively, and for diatom diets were 35 to 86,...

The gravitational effects of the Sun on a particle orbiting another massive body which itself moves on a circular path around the Sun have been studied extensively. Most recently, D. P. Hamilton and J. A. Burns (1991, Zcarus 92, 118-131) characterized the size and shape of a stability zone around an asteroid on a circular heliocentric orbit within which material could remain bound for an extend...

The barnacle life cycle has two key stages at which eicosanoids are believed to be involved in cellular communication pathways, namely the hatching of nauplii and the settlement of cypris larvae. Barnacle egg-hatching activity has previously been reported to reside in a variety of eicosanoids, including 8-hydroxyeicosapentaenoic acid and a number of tri-hydroxylated polyunsaturated fatty acid d...

DNA metabarcoding has been widely used in biodiversity assessments as a complement to traditional morphology-based techniques. This technique is useful for the early detection and surveillance of non-indigenous species (NIS) aquatic ecosystems. When introduced new locations, NIS can establish, become invasive, which may cause severe alterations native ecosystems biodiversity. As most introducti...