There are approximately a dozen species of commercially interesting barnacles worldwide, some of which have been cultured on a semi-industrial scale. These species are listed and information is provided with regard to geographical distribution, landings and prices. Traditionally, 'goose' barnacles (four species) are considered to be the most important for consumption. World production already stands at 500 tonnes year À 1 , but this species has not been cultured to date. Some 'acorn' barnacles are also consumed (seven species), with harvest levels per species that do not exceed 200 tonnes year À 1 and selling prices that can reach US$17/kg.' Acorn' barnacle culture on a world scale is still developing. Nevertheless, production has occurred on a semi-industrial scale; speci¢cally, spat have been collected from the wild and grown in suspended systems. Farming trials have focused on two species of acorn barnacles: Austromegabalanus psittacus (Molina 1782) 'picoroco' in Chile and Megabalanus azoricus (Pilsbry 1916) 'craca' in Portugal. The large-scale production of these crustaceans will depend on the optimization of spat collection from the wild and/or the parallel development of mass production technologies for larvae (hatcheries). In addition, further development will be achieved by opening up new markets for commercialization.

Dispersal on floating seaweeds depends on availability, viability, and trajectories of the rafts. In the southern hemisphere, the bull kelp Durvillaea antarctica is one of the most common floating seaweeds, but phylogeographic studies had shown low connectivity between populations from continental Chile, which could be due to limitations in local supply and dispersal of floating kelps. To test this hypothesis, the spatiotemporal dynamics of kelp strandings were examined in four biogeographic districts along the Chilean coast (28°-42°S). We determined the biomass and demography of stranded individuals on 33 beaches for three subsequent years (2013, 2014, 2015) to examine whether rafting is restricted to certain districts and seasons (winter or summer). Stranded kelps were found on all beaches. Most kelps had only one stipe (one individual), although we also frequently found coalesced holdfasts with mature males and females, which would facilitate successful rafting dispersal, gamete release, and reproduction upon arrival. High biomasses of stranded kelps occurred in the northern-central (30°S-33°S) and southernmost districts (37°S-42°S), and lower biomasses in the northernmost (28°S-30°S) and southern-central districts (33°S-37°S). The highest percentages and sizes of epibionts (Lepas spp.), indicative of prolonged floating periods, were found on stranded kelps in the northernmost and southernmost districts. Based on these results, we conclude that rafting dispersal can vary regionally, being more common in the northernmost and southernmost districts, depending on intrinsic (seaweed biology) and extrinsic factors (shore morphology and oceanography) that affect local supply of kelps and regional hydrodynamics.

Sports science article publication in South American countries (n=11) was studied between 1970-2012, using all citation database of ISI Web of Knowledge. We evaluated: number of published articles; the number of publications divided by the number of people in science and technology (number pub/number peo); the top incidence of research subjects; public or private institutional predominance; impact factor (IF); average citations per document per country; and frequency of published articles per journals per country. Brazil showed the highest number of published articles, followed by Argentina. Bolivia showed the highest number pub/number peo, followed by Peru. Most studied themes were physiology, orthopedic and rehabilitation. Public institutions showed a higher published articles number than did private institutions. Peru and Bolivia were the only countries with a mean IF of 2 or higher. Average citation was higher in Peru (higher coefficient variation). In conclusions, our results show that, in most South American countries, their published articles rate has increased over time. This could be related to new government and institutional policies. However, production was low compared with other areas of science.

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