Lake Tanganyika has a very rich pelagic fishery, which consists mainly of endemic clupeid species (Stolothrissa tanganicae and Limnothrissa miodon) and their predators, endemic centropomids (Lates spp.). Stolothrissa tanganicae is the most important species in the fishery. Coenen (1995) estimated a total overall fish catch for Lake Tanganyika from 1992 to be 167,000 metric tones, of which 80,00...

Many of us consider ourselves "fishermen." Many fishermen consider themselves good fishermen. A select few of the good fishermen are professional sport-fishermen, those who pursue big fish for a living. All of these fishermen undoubtedly use modern day rods and reels, often with expensive lures and other equipment that are "guaranteed" to produce a good catch .• Not even the best equipment can ...

Caribbean seagrass habitats provide food and protection for reef-associated juvenile fish. The invasive seagrass Halophila stipulacea is rapidly altering these seascapes. Since its arrival in the Caribbean in 2002, H. stipulacea has colonized and displaced native seagrasses, but the function of this invasive seagrass as a juvenile fish habitat remains unknown. To compare diversity, community st...

Introduction: The Chilika lagoon in south Odisha, India was ecologically degraded from 1985 onwards by reduction of its aquatic (fish + prawn shrimp) catches along with salinity, hydraulic regime, water exchange, weeds invasion, and sediment influx. catch 8669MT year 1985-1986 gradually reduced to 1274MT during 1995-1996 Odisha Fisheries Dept. records which resulted poor economic condition ≈0,2...

The relationship between the Lower Danube River level and Romanian annual catches of Pontic shad (Alosa immaculata, Bennett 1835) were analyzed. For analysis of long term data on the Danube River water level and Pontic shad catch, combinations of different methods were applied using statistical programs, SPSS 13.0 and MATLAB 6. Periodograms, containing cyclic patterns, were obtained using Fouri...

Wefocuson the zero-catchproblemofCPUE (catchperunit effort) standardization. Because the traditional CPUE model with a log-normal error structure cannot be applied in this case, three methods have often been utilized as follows: (1) Ad hoc method adds a small constant value to all response variables. (2) Catch model with a Poisson or negative-binomial (NB) error structure. (3) Delta-type two-st...

The live reef fish trade (LRFT) is one of the greatest but least-quantified sources of fishing pressure for several species of large coral reef fish across the Indo-Pacific. For the first time we quantify the localized impact of the LRFT. We collected data from three LRFT traders in northern Borneo, which yielded information on daily fishing effort and the species and mass of all fishes sold ev...

Harvesting of living resources involves conflicting objectives between profits, human consumption, population sustainability and ecological impacts. These trade-offs are often complex, as harvesting affects demography and productivity of wild populations immersed in rich ecological interactions, and consequences may extend to the evolutionary dimension. In a life-history model of a commercially...

Indiscriminate and intense fishing has occurred in many marine ecosystems around the world. Although this practice may have negative effects on biodiversity and populations of individual species, it may also increase total fishery productivity by removing predatory fish. We examine the potential for this phenomenon to explain the high reported wild catches in the East China Sea-one of the most ...

Observers were placed on pelagic vessels in the Scottish fisheries for mackerel (Scomber scombrus), herring (Clupea harengus), “maatje” herring (herring caught just before their first spawning) and argentines (Argentina silus) to monitor by-catch composition and discarding practices. A total of 67 days was spent at sea, 11 on the argentine fleet, 28 on the herring fleet, 12 on the “maatje” herr...