Systematic studies of 618 fishing vessel losses between January 1961 and December 1982 have shown a significantly increased incidence of total losses from 1972 onwards. Comparison of mean pre- and post-1972 rates indicated an increase of 120% from 2.54 to 5.58 losses per 1000 vessels at risk. Parallel examination of the mortality of fishermen from all occupational accidents showed no improvemen...

Fishing reduces stock size and shifts demographics, and selective mortality may also lead to evolutionary changes. Previous studies suggest that traits may change evolutionarily because of fishing on decadal time scales. Here we examine the potential bioeconomic impacts of fishing-induced evolutionary change. We used a life-history model with stock dynamics based on evolving maturation age, whi...

OBJECTIVES To evaluate the effectiveness of the United States Commercial Fishing Industry Vessel Safety Act of 1988 in reducing the high occupational death rate (200/100,000/year in 1991-2) among Alaska's commercial fishermen. METHODS Comprehensive surveillance of deaths in commercial fishing was established by our office during 1991 and 1992 for Alaska. Demographic data and data on risk fact...

BACKGROUND Regression modeling methods are commonly used to estimate influenza-associated mortality using covariates such as laboratory-confirmed influenza activity in the population as a proxy of influenza incidence. OBJECTIVE We examined the choices of influenza proxies that can be used from influenza laboratory surveillance data and their impact on influenza-associated mortality estimates....

  The population parameters and spawning season of the Spangeld emperor (Lethrinus nebulosus) were studied in coastal waters of Hormouzgan province. The monthly calculated mean values of gonadosomatic index (GSI) of females were indicate to increase from February, reach the highest in March and decline in June. The spawning season peak of L. nebulosus occurred in March. The Von Bertalanffy grow...

The risk of mortality related to occupation was determined for commercial fishermen in the Canadian Atlantic coast provinces of Nova Scotia, New Brunswick, and Prince Edward Island. The subjects were a cohort of 31,415 fishermen licensed by the Canadian Department of Fisheries during 1975-83. Mortality and cause of death were obtained from the Canada Mortality Data Base and the Marine Casualty ...

Overfishing of sharks is a global concern, with increasing numbers of species threatened by overfishing. For many sharks, both catch rates and underwater visual surveys have been criticized as indices of abundance. In this context, estimation of population trends using individual demographic rates provides an important alternative means of assessing population status. However, such estimates in...

A new method for estimating population sizes from catch-at-age data is given. The method treats the observed population sizes as missing data and uses a combination of the Kalman filter and the EM algorithm to derive maximum likelihood estimates of the parameters and minimum mean square error estimates of the population sizes. The algorithm does not assume that the observation errors and the er...

AIMS To establish the causes and circumstances of all deaths occurring at work or related to work among fishermen in British commercial fishing between 1976 and 1995. METHODS A retrospective study, based on official mortality files, with a population of 440 355 fishermen-years at risk. RESULTS Of 616 deaths in British fishing, 454 (74%) were due to accidents at work, and 394 (87%) of these ...