BACKGROUND Several studies have demonstrated clinical benefits of fish consumption for the cardiovascular system. These effects are attributed to the increased amounts of polyunsaturated fatty acids in these foods. However, the concentrations of fatty acids may vary according to region. OBJECTIVE The goal of this study was to determine the amount of,cholesterol and fatty acids in 10 Brazilian...

Humans have dramatically altered the Great Lakes basin of North America through agricultural practices, urban development, industrial and commercial activities, and introductions of non-native species (Christie et al. 1987, Steedman and Regier 1987, Edsall 1996). Stressors associated with these changes have overwhelmed natural ecosystem processes throughout the basin (Regier and Hartman 1973, S...

A 2-yr, seasonal, parasitological study of 1,435 fish, belonging to 4 species of native fishes and 7 species of nonnative fishes from the lower Little Colorado River (LCR) and tributary creeks, Grand Canyon, Arizona, yielded 17 species of parasites. These comprised 1 myxozoan (Henneguya exilis), 2 copepods (Ergasilus arthrosis and Lernaea cyprinacea), 1 acarine (Oribatida gen. sp.), 1 piscicoli...

The Indo-West Pacific (IWP) coral-reef damselfish Neopomacentrus cyanomos is well established across the south-west Gulf of Mexico (SwGoMx). Comparisons of mtDNA sequences of the SwGoMx population with those from conspecifics from 16 sites scattered across its native geographic range show that the SwGoMx population is derived from two of four native lineages: one from the north-west Pacific Oce...

Fig.!. The worm has turned! In this unstaged photograph taken at Parker Canyon Lake, Cochise County, Arizona. 1964, an intro­ duced bullfrog is swallowing a Mexican garter snake. normally a frog-eating species. Such preda­ tion appears to be destroying remaining populations of this garter snake in the United States. I n the American Southwest, much of the native fish fauna is facing extinction ...

The diets of stoneflies (Perlodidae) and hellgrammites (Corydalidae) from the Gila River, New Mexico, were quantified and compared to diets of three native fishes that also occupy riffle habitats along with stoneflies and hellgrammites: speckled dace (Rhinichthys osculus); longfin dace (Agosia chrysogaster); desert sucker (Catostomus clarkii). The highest overlap occurred among corydalids, dese...

As they integrate into recipient food webs, invasive exotic species may influence the population dynamics of native parasites. Here we assess the potential impact of the Eurasian round goby (Neogobius melanostomus) on the abundance of eyeflukes of the genus Diplostomum, which are common parasites in fishes of the St. Lawrence River (Canada). Analyses of data collected over nearly two decades re...

Biodiversity inventories and monitoring techniques for marine fishes often overlook small (<5 cm), bottom-associated (‘cryptobenthic’) fishes, few standardized, comparative assessments of cryptobenthic fish communities exist. We sought to develop a quantitative survey method that permits their sampling across variety habitats conditions. Fish-specific autonomous reef structures (FARMS) are desi...

The global translocation and introduction of freshwater fish into non-native regions has created the perfect opportunity for the co-introduction of their parasites. In a recent review on non-native freshwater fish introductions in South Africa, 55 fishes were reported as introduced into novel environments in South Africa, with 27 alien and 28 extralimital. However, the parasites potentially co-...

The grouper species peacock hind (Cephalopholis argus) (Serranidae: Epinephelinae), a reef fish predator that is native over most of the IndoPacific region, was introduced to the Main Hawaiian Islands (MHI) in 1956 as part of an introduction program of snapper and grouper species intended to enhance nearshore fisheries (Randall, 1987). Today, this non-native predator occupies a dominant positio...