García-Guillén, R.M., R., De Silva-Dávila, C.A., Silva-Segundo, J.F., Domínguez-Contreras, L., Carrillo & L., Vázquez-Yeomans (2023). Distribución horizontal y vertical de las paralarvas de Abralia spp. en el Mar Caribe con notas morfológicas y moleculares. XXIII Reunión Nacional de la Sociedad Mexicana de Planctología A.C. y XVI International Meeting of the Mexican Society Of Planktology A.C.. Cozumel, Quintana Roo, México, mayo 29 - junio 2, 2023, 234.
Rubén Melvyn García-Guillén 1, Roxana De Silva-Dávila 2, Claudia A. Silva-Segundo 3, José Francisco Domínguez-Contreras 4, Laura Carrillo 5 y Lourdes Vázquez-Yeomans 5
The genus Abralia (Enoploteuthidae) is part of the most abundant group of cephalopod families in tropical-subtropical regions of the oceans, particularly in the Caribbean Sea. The adults of this genus register high abundances in this region, however, the distribution and abundance of their paralarvae are unknown, as well as their morphology in the early stages of development, which makes their specific identification difficult. In this study, the paralarvae of Abralia spp. obtained from surface Neuston, subsurface Neuston and MOCNESS trawls (0-58 m) carried out off the coast of the Cayman Islands, Jamaica, Haiti and on the eastern coast of the Yucatan Peninsula, Mexico, Belize and Honduras, describing the horizontal distribution and vertical of its abundance, in addition to its morphology and molecular identity. The highest abundance of Abralia spp. was recorded in Neuston subsurface trawls off Banco Chinchorro, Cozumel and Honduras, and in a 38?48 m depth stratum in MOCNESS trawls. The paralarvae presented evidence of an ontogenetic migration with larger-sized paralarvae distributed at greater depths. In the Mesoamerican Reef System, a high percentage of paralarvae (68% of the total) with sizes of 1.1?2.0 mm in mantle length (ML) was identified, which suggests that it is an important area for the spawning and development of the genus. Additionally, the molecular analysis (DNA barcoding) showed the presence of two species: Abralia redfieldi and Abralia veranyi (99.01?100% similarity). However, in the descriptive analysis of the morphological characters of Abralia spp. it was not possible to distinguish the species identified molecularly, but their geographic overlap along the Caribbean Sea is confirmed, describing the general morphology of the paralarvae between 1.1?6.0 mm ML.
Palabras clave: Cephalopods; Integrative taxonomy; COI
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