A multivariate approach was used to test the value of intertidal communities as a bioindicator of environmental conditions at Algeciras Bay, southern Spain. The study area is located in the Strait of Gibraltar and it is subjected to a variety of anthropic impacts. Eight localities (5 inside and 3 outside the bay) were selected, and four transects were undertaken in each locality to characterise...

In many nonclonal, benthic marine species, geographic distribution is mediated by the dispersal of their larvae. The dispersal and recruitment of marine larvae may be limited by temperature gradients that can affect mortality or by ocean currents that can directly affect the movements of pelagic larvae. We focus on Point Conception, a well-known biogeographic boundary between the Californian an...

A long-standing issue in marine biology is identifying spatial scales at which populations of sessile adults are connected by planktonic offspring. We examined the genetic continuity of the acorn barnacle Balanus glandula, an abundant member of rocky intertidal communities of the northeastern Pacific Ocean, and compared these genetic patterns to the nearshore oceanography described by trajector...

This study presents updated information on six exotic aquatic species (five crustaceans and one fish): Macrobrachium rosenbergii, Penaeus monodon, Charybdis hellerii, Balanus trigonus, Amphibalanus improvisus, Pterois volitans. The research is based bibliographic available in scientific articles published by the Research Group Fishing Evaluation of Tropical Fishery Resources Biological Photogra...

The effects of predation and competition on survival of the barnacle, Balanus improvims Darwin, in the upper Chesapeake Bay varied from location to location in 1972 and probably vary from year to year. The flatworm, Stylochus ellipticus Girard, was the predominant predator on barnacles, and the bryozoan, Victorella pavida Kent, was the major spatial competitor. Those intertidal barnacles not ki...