Abstract
The diet of the thornback guitarfish Platyrhinoidis triseriata is described from 31 specimens (22 females and 9 males; 30.9–53 cm total length) collected from the western coast of the Baja California Peninsula. According to the Prey-Specific Index of Relative Importance (%PSIRI), the main prey were pelagic red crab Pleuroncodes planipes (25.5%), Portunus xantusii (25.5%), Squilla hancocki (7.1%), and Penaeus spp. (3.6%). Fishes were also observed in the diet (Paralichthys californicus, Porichthys spp., family Congridae). The estimated trophic level was 3.5, indicating that P. triseriata is a secondary consumer that predates benthic organisms. This is the first study on the diet of P. triseriata.
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Acknowledgements
We thank Brenda Medina Bañuelos and Gustavo Andrade Domínguez who participated in the biological sampling in the Centro Regional de Investigaciones Acuícolas y Pesqueras (CRIAP). OES thanks CONACYT for the project Cátedras CONACYT (N° 2137) and for financial support through SNI (Sistema Nacional de Investigadores). This work was supported by Consejo Nacional de Ciencia y Tecnología (CONACYT) through the project Ciencia Básica (N°. 255687). Thank the reviewers for their constructive comments to improve this paper.
Funding
This work was supported by Consejo Nacional de Ciencia y Tecnología (CONACYT) through the project Ciencia Básica (N°. 255687).
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All applicable international and guidelines for use of animals were followed by the authors. The authors use animals caught by fishermen.
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OES—conceptualization, data analysis, manuscript preparation, writing—reviewing and editing manuscript. JEPM—data analysis, reviewing the manuscript. DCE—data generation, funding acquisition, reviewing the manuscript
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Communicated by S. E. Lluch-Cota
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Escobar-Sánchez, O., Pollorena-Melendrez, J. & Corro-Espinosa, D. Food components of the thornback guitarfish Platyrhinoidis triseriata on the western coast of Baja California Peninsula. Mar. Biodivers. 52, 10 (2022). https://doi.org/10.1007/s12526-021-01252-2
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DOI: https://doi.org/10.1007/s12526-021-01252-2