The aspect ratio of the caudal fin of 63 fish species was measured. Swimming speeds for these species, representing 129 cases, were obtained from the literature for various fish sizes and speeds, i.e. "minimum speed" for sustained swimming and "maximum speed" (+ "burst" speed). Results show a...

An attempt to fit the von Bertalanffy growth equation to three species of deep sea snappers using the ELEFAN method was unsuccessful, mainly because the fish are slow-growing, long lived species. Problems were also encountered in estimating asymptotic length and Z/K using a Wetherall plot....

Catch assessment estimates for the motorized and non-motorized canoes at Boa-Manga (Cameroon) were found to be 5.13 and 2.70 t/year, respectively, leading to an estimated lower limit for the production of the Ocean division (100 km coastline) of 1190 t/year. The net economic benefit for the...

The 1988-1989 shrimp catch from kuwait waters was 5125 t, representing a 62% increase above the previous record of 3158 t in 1966-1967. Ninety-eight per cent of the record landing was comprised of Penaeus semisulcatus (Penaeidae). The attainment of optimal spawning-stock biomass by reduction in...

A brief review of studies on the seasonal growth of fish is presented, followed by an equally brief review of length-converted catch curves. A new method for constructing catch curves from representative length-frequency data is presented. This new method explicitly accounts for seasonal growth...

Discounted cash flow techniques, as typically employed in the evaluation of fishery projects, employ constant cost and revenue streams over the duration of the project. The implicit assumption is that additional effort in the fishery does not adversely affect costs and yields. This assumption is...

Estimates of growth parameters for Stolephorus devisi (Engraulidae) at Munda Baitground, Solomon Islands were obtained using the Compleat ELEFAN software. Also, estimates of natural and fishing mortality are presented, along with recruitment patterns. All results are presented on a per year...

Modern databases can be successfully used to develop computer-based identification systems. In a first case study, fish larvae were identified with an average of three easily obtained characters. In a second case study, 17 fish diseases out of 20 were diagnosed directly, using an average of six...

Trap-introduced fishing mortality of juvenile fish was seen as a potential problem in the developing fish trap fishery on the Australian North West Shelf. Line fishermen are concerned that traps are unselective. Research to investigate the reality of the problem and to assess large-mesh traps as...

Preliminary, length-based von Bertalanffy growth parameter estimates for Sardinops caeruleus, Opisthonema libertate, Scomber japonicus, Etrumeus teres, and Engraulis mordax, caught in the pelagic fishery based in Guaymas, Gulf of California, Mexico, are presented along with estimates of natural...