A model for estimating fish population and optimal fishing effort in lakes and rivers
Abstract:We developed a model for estimating the fish population for various species in lakes and rivers. Our estimation focuses, in its first step, on fish species that breed outside the lake. Using the annual outside supply of fingerlings, natural survival rate and reported amounts of fish caught, we estimated fish stock. Given the estimated stock for fish bred outside the lake, we can evaluate the catch rate. Assuming equal catch rates for other species, and given the amount caught for each species, we are able to evaluate each species stock. Using the proposed technique, we evaluated various species stocks in the Sea of Galilee (Lake Kinneret) in Israel. Using our suggested technique for evaluating fish stock, we calculated the optimal effort of fishing needed for maximizing steady state profit of the fishers.
Document Type: Research Article
Affiliations: 1: Department of Economics,The Max Stern Academic College, Emek Yezreel 19300, Israel 2: Department of Economics,Ben Gurion University, Beer-Sheva, Israel 3: Department of Maritime Civilizations,University of Haifa, Haifa, Israel 4: Department of Maritime Civilizations,The Leon Recanati Institute for Maritime Studies, University of Haifa, Haifa, Israel
Publication date: March 1, 2012