Spatial Dynamics Modeling of Small-Scale Fishing Fleets With a Random Walk Approach
Por:
Quijano Quinones, Daniel R., Lopez-Rocha, Jorge A., Hernandez-Herrera, Isis, Torres-Irineo, Edgar
Publicada:
25 may 2021
Resumen:
The understanding of fishing effort allocation has been recognized as a
key feature within the spatial management planning of fisheries. In
small-scale fisheries this assessment is challenging because of their
multi-specific context. This has resulted in management regulations that
do not fulfill their objectives. Therefore, the analysis of vessels
movement is needed for the better assessment and management of
small-scale fisheries. Thus, we used a Random Walk (RW) modeling
approach to characterize the fishing trips of small-scale multi-gear
vessels targeting multiple species. We analyzed activities of three
different gears (hand net, handline, longline) and two fishing methods
(diving, ``gareteo'') recorded with a GPS from 156 fishing trips along
three fishing seasons (2018-2020) by the small-scale fleet of Yucatan,
Mexico. We fitted seven RW models for the movement data and compared
their relative and absolute fit through a delta Akaike test and G-Tests
respectively. A total of 143 trajectories showed conclusive evidence to
establish a CCRW-type movement; the remaining 13 trajectories fit three
models (CCRW, TRW and CRW). The Random Walk models were useful for
modeling a multi-gear, small-scale fleet operating in southeast Mexico.
According to our results, the Composite Correlated Model was the most
suitable RW for this fleet. For future studies, we suggest increasing
the number of fishing trips and conducting specific studies by gear and
fishing method. Also, the application of relative and absolute fit tests
to compare the performance of RW models is highly recommended.
Filiaciones:
Quijano Quinones, Daniel R.:
Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Sisal, Mexico
Lopez-Rocha, Jorge A.:
Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Lab Anal Espacial Zonas Costeras, Sisal, Mexico
Hernandez-Herrera, Isis:
Univ Nacl Autonoma Mexico, Unidad Merida, Escuela Nacl Estudios Super, Ucu, Mexico
Torres-Irineo, Edgar:
Univ Nacl Autonoma Mexico, Unidad Merida, Escuela Nacl Estudios Super, Ucu, Mexico
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