Impact of disease on the survival of three commercially fished species

摘要: Recent increases in emergent infectious diseases have raised concerns about the sustainability of some marine species. The complexity and expense studying systems often dictate that conservation management decisions are made without quantitative data on population-level impacts disease. Mark–recapture is a powerful, underutilized, tool for calculating disease population size structure, even absence etiological information. We applied logistic regression models to mark–recapture obtain estimates disease-associated mortality rates three commercially important species: snow crab (Chionoecetes opilio) Newfoundland, Canada, experience sporadic epizootics bitter disease; striped bass (Morone saxatilis) Chesapeake Bay, USA, chronic dermal visceral mycobacteriosis; American lobster (Homarus americanus) Southern New England stock, epizootic shell All decreased survival diseased hosts. Survival adult male crabs was 1% (0.003–0.022, 95% CI) uninfected indicating nearly complete infected this life stage. moderately severely (which comprised 15% 11% population, respectively) 84% (70–100%, CI), 54% (42–68%, healthy bass. disease-adjusted yearly natural rate 0.29, double previously accepted value, which did not include lobsters 30% (15–60%, mildly 45% (27–75%, lobsters. High ovigerous females may explain poor recruitment rapid declines observed population. Stock assessments should account disease-related when resource options evaluated.