Three taxa of luminous bacteria (Photobacterium fischeri, P. phosphoreum, and Beneckea spp.) were found in the enteric microbial populations of 22 species of surface- and midwater-dwelling fishes. These bacteria often occurred in concentrations ranging between 10 and 10 colony-forming units per ml of enteric contents. By using a genetically marked strain, it was determined that luminous cells e...

Distribution of salinity, dissolved oxygen, nitrate, phosphate, and silicate are presented for the western Gulf of Mexico in 1978. Plots of chemical concentration versus potential density are used to identify the presence of gulf water, tropical Atlantic central water, Antarctic intermediate water, Caribbean midwater, and upper North Atlantic deep water within the upper 1600 m of the western Gu...

Abstract Between October 2018 and 2019, seven megamouth sharks were reported as bycatch in the small-scale surface midwater gillnet fisheries operating from ports of Mancora Salaverry northern Peru. Here we present details these specimens events that represent first documented records this species Peruvian waters, confirming their occurrence bycatch. We recommend continued monitoring programs t...

Knowledge of the spatial distribution of juvenile cod is essential for obtaining precise recruitment data to conduct sustainable management of the eastern and western Baltic cod stocks. In this study, the horizontal and vertical distribution and density patterns of settled juvenile 0- and 1-group Baltic cod are determined, and their nursery areas are localised according to the environmental fac...

During the CARIACO time series program, microbial standing stocks, bacterial production, and acetate turnover were consistently elevated in the redox transition zone (RTZ) of the Cariaco Basin, the depth interval (;240–450 m) of steepest gradient in oxidation-reduction potential. Anomalously high fluxes of particulate carbon were captured in sediment traps below this zone (455 m) in 16 of 71 ob...

Abstract The iconic Atlantic cod (Gadus morhua Linnaeus, 1758) has inspired a substantial body of fishing-gear research across its geographical range, with recent efforts predominately to reduce catches this species in fisheries where their populations are fragile. Despite status and long history study compared other species, our understanding behaviour during the capture process bottom trawl r...

The subject matter of this Bachelor ́s thesis is the Eastern Baltic Sea cod. A literature review has been done regarding how environmental factors such as salinity, oxygen supply and temperature but also the size of the cod populations affects the migration patterns and the habitat choice of the cod. The result of the review shows that, when the eastern Baltic cod population is small, its area o...