The Holocene evolution of eight South African coastal lakes and lagoons is examined and related to changes in fish composition over that period. Historical and current connectivity with riverine and marine environments are the primary determinants of present-day fish assemblages in these systems. A small and remarkably consistent group of relict estuarine species have persisted in these coastal...

In fishes, alterations to the natural flow regime are associated with divergence in body shape morphology compared with individuals from unaltered habitats. However, it is unclear whether this morphological divergence is attributable to evolutionary responses to modified flows, or is a result of phenotypic plasticity. Fishes inhabiting arid regions are ideal candidates for studying morphologica...

Like many other organisms, fishes are also rich sources of bio-active compounds which were well studied by research focused on their antimicrobial, antihypertensive, antioxidant and antitumor activities. They can be used not only for good nutritional value, but also for peptides obtained with analytic processes that were developed in last decades. Aquatic organisms total the highest number of s...

An occurrence of the copepod Lamproglena monodi Capart, 1944, parasitizing freshwater fishes in Brazil is presented, along with new morphological data. This crustacean was originally described parasitizing several cichlids in Africa. In the present study, the crustaceans were collected from the body surface and gills of two fish species native to Brazil [Astronotus ocellatus (Agassiz, 1831) and...

Fish faunas across the continental United States have become more similar through time because of widespread introductions of a group of cosmopolitan species intended to enhance food and sport fisheries. On average, pairs of states have 15.4 more species in common now than before European settlement of North America. The 89 pairs of states that formerly had no species in common now share an ave...

Raising knowledge of the dispersal non-indigenous species (NIS) in new geographic areas is a matter major concern, as alien may outcompete native biota through competition, predation, and hybridization. In Mediterranean Sea, where biological invasions constitute serious threat, combined use citizen science social networks amplified results obtained via traditional research activities, often rec...

We assessed the fish assemblage structure and composition of Nova Ponte Reservoir (Araguari River, Upper Paraná Basin, Brazil). We observed significant differences in abundance (p = 0.0003), richness (p = 0.0005) and diversity (p = 0.02) between lacustrine and riverine zones of the reservoir. Nine species were significantly more abundant in the riverine region: Astyanax altiparanae, Astyanax gr...

The susceptibility of brown trout (Salmo trutta) and rainbow trout (Oncorhynchus mykiss) to the monogenean Discocotyle sagittata in the United Kingdom was assessed by experimental infection of naive fish. One month postinfection with 100 oncomiracidia/host, brown trout harbored significantly lower burdens (27.7 worms/host +/- 4.13 SE) than rainbow trout (47.8 worms/host +/- 3.90; P = 0.002). Th...

heterophyidosis is a fish-transmitted disease in khuzestan province, therefore a total of 900 fresh water fishes belonging to cyprinus carpio, liza abtt and gambosia affinis, were collected from canals of mazreeh district in the central area of khuzestan. in 44%, metaccrcariae of three small flukes of human including haplorchis taickut, haplorchis pumilio, stellanichasmus falcamtus were found. ...

A new species of deep-reef fish in the goby genus Palatogobius is described from recent submersible collections off Curaçao and Dominica. Video footage of schools of this species reveal predation by the invasive Indo-Pacific lionfish (Pterois spp.), the first record of undescribed fauna potentially being eaten by lionfish outside of its native range. We present molecular phylogenetic data for a...