期刊
FISHES
卷 7, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/fishes7010015
关键词
bigeye croaker; Cobb-Douglas; stock reduction analysis; upper Gulf of California
资金
- Consejo Nacional de Ciencia y Tecnologia (National Council of Science and Technology), through the postdoctoral stay program in Mexico at Centro de Investigaciones Biologicas del Noroeste [CVU 634251]
The study conducted a stock reduction analysis of bigeye croaker based on commercial catch data. The results showed a 73.6% decrease in stock from 1983 to 2020. Additionally, the possible effect of stock hyperstability was evaluated, and it was found that the catch was directly proportional to the fishing effort of small boats and vessels.
A stock reduction analysis (SRA) of bigeye croaker Micropogonias megalops was performed based on commercial catch data. SRA solutions were restricted to a 2011 bigeye croaker stock biomass estimate of 14,412 t. The viable solution indicated a reduction in stock of 73.6% from 1983 to 2020 with an initial biomass of 22,186 t. In addition, a possible effect of hyperstability of the stock was evaluated by applying different versions of the Cobb-Douglas catch function. The most probable function based on a multi-model selection procedure was the one wherein the catch does not depend on biomass and is directly proportional to the applied fishing effort of small boats (~7 m) and vessels (~24 m). This situation suggests that in a free access regime, fishing can deplete the resource until it collapses, without observing a significant reduction in its catches until the event is very close.
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