Among the several fish species comercially exploited at the Pantanal of Mato Grosso do Sul, the "pacu" (Piaractus mesopotamicus) stands as one of the most important. Information regarding its exploitation level is necessary for the proper management of its stocks. Between 1996 and 1997 data on total length of the pacu were collected on a monthly basis from specimens caught by professional and s...

The Beverton–Holt and Ricker stock-recruit functions were derived in terms of two pre-recruit mortality parameters. Mace, & Doonan, (1988, A generalized bioeconomic simulation model for fish population dynamics) reparameterized the function steepness, which combines with post-recruit biological parameters defining unfished spawning biomass per recruit. Their parameterization explicitly assumes ...

population dynamic parameters of red mullet, mullus barbatus (n=592) caught by trawlers operating in arzew gulf (algeria) in the western mediterranean were studied. samples were collected between february 2013 and january 2014. females ranged from 10.9-23.2 cm in total length and 12-149.2 g in weight whereas males length was comprised between 12.6 and 19.7 cm and weight between 21.3 and 99.9 g....

Changes over time in age, sex, and length-at-age of returning Pacific salmon have been widely observed, suggesting concurrent declines per capita reproductive output. Thus, assessment models assuming stationary output may inaccurately estimate biological reference points that inform harvest policies. We extended age-structured state-space spawner–recruit to accommodate demographic trends fisher...

The authors determined the incidence of podiatric injuries that occurred during 233,946 recruit days at risk among US Marine Corps recruits undergoing basic training at the Marine Corps Recruit Depot, San Diego, CA, between February 5 and April 25, 1990. Training-related initial injuries to the foot occurred at a rate of 3.0 new injuries per 1,000 recruit days. The highest specific rates of inj...