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Resumen del producto
Fernández Aguirre, E., F., Galván-Magaña, A., Sánchez González, R., González Armas, L.A., Abitia Cárdenas, F.R., Elorriaga-Verplancken, M.T., Villalejo Fuerte, A., Tripp Valdez, A.V., Barajas Calderón, A., Delgado-Huertas & R.Q., Torres-García
(2022).
Changes in the feeding habits of the bat ray Myliobatis californica (Gill 1865) during climatic anomalies off the west coast of the Baja California Peninsula, Mexico.
Regional Studies in Marine Science.
53: 102462.
DOI: 10.1016/j.rsma.2022.102462.
Changes in the feeding habits of the bat ray Myliobatis californica (Gill 1865) during climatic anomalies off the west coast of the Baja California Peninsula, Mexico
Enmaylin Fernández Aguirre, Felipe Galván-Magaña 1, Alberto Sánchez González 1, Rogelio González Armas 1, Leonardo Andrés Abitia Cárdenas 1, Fernando Ricardo Elorriaga-Verplancken 1, Marcial Trinidad Villalejo Fuerte 1, Arturo Tripp Valdez 1, Alma Vianney Barajas Calderón, Antonio Delgado-Huertas y Rolando Quetzalcoatl Torres-García
1 Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas
The Mexican Pacific was influenced by ‘‘La Mancha’’ and ‘‘El Niño’’, from 2014 and until 2016. Theincrease in sea surface temperature influenced the feeding habits of the bat ray (Myliobatis californica)in the northwest of Baja California Sur, Mexico. To evaluate possible changes in the diet, stomachcontent analysis and analysis of stable isotopes of carbon (d13C) and nitrogen (d15N) in muscle wasperformed during normal (2012 and 2013) and anomalous years (2014, 2015, and 2016). During thenormal years, the main prey was the crab Dynomene spp. (% Prey Specific Relative Importance Index(PSIRI) = 29.3) and the stomatopod Hemisquilla californiensis (% PSIRI = 10.6). In contrast, during theanomalous years, these preys were replaced by the pelagic red crab Pleuroncodes planipes (% PSIRI =28.5) and peanut worms Sipunculus spp. (% PSIRI = 7.9). During normal years the median isotopic valuesrecorded were: d13C = -16.2h and d15N = 15.2h. During the anomalous years, d13C was -16.3h andd15N was 15.1h. Between the different periods no trophic (p (probability) > 0.05) or isotopic overlaps(p > 0.3) were found. The change in the diet of M. californica during the anomalous years is anadaptive response to the increase in water temperature caused by ‘‘La Mancha’’ and ‘‘El Niño’’. Themassive presence of P. planipes on the northwest coast of Baja California Sur is associated with theincrease in water temperature, which makes P. planipes a food source for M. californica.
Palabras clave: Bat ray; feeding habits; stable isotopes; Pelagic red crab; Water temperature
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