Identifying pathways that animals use to move among ecosystems has become a focus for improving conservation planning. The function of habitat corridors in facilitating animal movement among terrestrial ecosystems is well established. By contrast, the role of habitat corridors for the movement of marine animals is poorly understood. We used underwater video cameras to evaluate the effects of se...

Selective mortality during the early life stages in marine organisms can affect the magnitude and composition of recruitment, yet these processes have not been examined in economically important predatory coral reef fishes. Utilizing 3 different stage-specific sampling techniques (shipboard plankton tows, larval light traps, juvenile surveys/seines), we repeatedly sampled multiple cohorts of 3 ...

Smoking with liquid smoke is one of the alternative processing methods lower temperatures and expected to reduce protein amino acid damage. This study aimed determine effect different concentrations corncob on quality both chemical sensory smoked barracuda fish. The method used was smoking fish four smoke, namely 0%, 2.5%, 5%, 7.5% at a temperature 40-50°C (1 hour), 50-60°C 70-80°C (2 hours). m...

This study aims to determine the effect of area, size and season on chemical composition Sphyraena barracuda from Sudanese Red Sea Coast. A total 180 fish samples were collected Port Sudan Sawakin fishing sites during winter summer 2020-2021. The fishes sample ranged between (30 - 50) cm in length (250 1000) gm body weight small size, (60 90) (1250 250) for large size. Fish flesh was subject gr...

We investigated Hg in muscle tissue of fish species from three trophic levels on fringing reefs of Tutuila (14°S, 171°W), plus water, sediment and turf alga. Accumulation of total Hg in the herbivore Acanthurus lineatus (Acanthuridae, lined surgeonfish, (n=40)) was negligible at 1.05 (±0.04) ng g(-1) wet-weight, (∼65% occurring as methyl Hg). The mid-level carnivore Parupeneus spp. (Mullidae, g...

Colour vision and colour signals are important to aquatic animals, but light scattering and absorption by water distorts spectral stimuli. To investigate the performance of colour vision in water, and to suggest how photoreceptor spectral sensitivities and body colours might evolve for visual communication, we model the effects of changes in viewing distance and depth on the appearance of fish ...

In this study, we compared the bycatch reduction capacity of a trawl fitted with standard rigid sorting grid that newly developed, flexible system called Excluder. We conducted fishing trials in Norway pout (Trisopterus esmarkii) small-meshed fishery North Sea. Catch data were analysed by species and length using catch comparison ratio method. The Excluder significantly reduced (in weight) rela...

The Chirostoma "humboldtianum" group includes seven silverside species considered as a monophyletic assemblage because of their high genetic and morphological similarities. The group includes five moderately large species, "peces blancos" (117-300 mm standard length--SL) and two smaller species, "charales" (70-142 mm SL). These species are of great economical, cultural and ichthyological intere...