This paper addresses the problem ofdetermining a catch level which stabilizes the parental biomass of a fish population at its present level. Initially, two methods are presented, both based on a simple catch equation and requiring estimates of recruitment, natural mortality, weights at age, proportions of sexually mature fish in each age class, and present parental biomass. Method I deals with...

A full and detailed description of a Strike Limit Algorithm (SLA) based on Adaptive Kalman Filtering techniques with an application to the Bering-Chukchi-Beaufort (B-C-B) Seas stock bowhead whales is presented in this paper. Extended filters are used estimate present size posterior probability distributions for MSY-rate (MSYR) pre-exploitation K. catch control law selected from one-parameter fa...

Although frequently suggested as a goal for ecosystem-based fisheries management, incorporating ecosystem information into stock assessments has proven challenging. The uncertainty of input data, coupled with the structural complex multi-species models, currently makes use absolute values from such models contentious short-term single-species management advice. Here, we propose different approa...

Abstract Accurate age estimates are crucial for assessing the life‐histories of fish and providing management advice, but validation studies rare many species. We corroborated with annual cycles oxygen isotopes (δ 18 O) in otoliths 86 northern pike ( Esox lucius ) from southern Baltic Sea, compared results visual scales otoliths, assessed bias introduced by different age‐estimation structures o...

This study aims to evaluate the economic benefits derived from conservation areas using case of National Marine Protected Areas (MPA) in Anambas Islands. The evaluated top four reef-associated fish with high values, namely grouper, red snapper, threadfin bream, and trevally fish. employed bioeconomic hybrid model estimate Maximum Economic Yield (MEY) for those under sustainable policies. We fou...

The two economically important shrimp species in Bangladesh are the tiger shrimp, Penaeus monodon, and brown Metapenaeus monoceros. However, a continuous decline landing of these from industrial trawling made it critical to assess their stock biomass status explore response present degree removal. Given minimum data requirement robustness, this study employed depletion-based reduction analysis ...