Guarneros-Narváez, P.V., R., De Silva-Dávila, R., Rodríguez-Canul, J.P., Ek- Huchim, U., Ordoñez López, S.Z., Herzka, A.J., Souza & I., Velázquez-Abunader (2022). Decapodiformes paralarvae (Mollusca: Cephalopoda) of the Southern Gulf of Mexico. Cephalopod International Advisory Council Conference 2022. Sesimbra, Portugal, abril 2 - 8, 2022, 116.
Paulina V. Guarneros-Narváez 1, Roxana De Silva-Dávila 2, Rossana Rodríguez-Canul 1, Juan P. Ek- Huchim 1, Uriel Ordoñez López 1, Sharon Z. Herzka 3, Alejandro J. Souza 1 y Iván Velázquez-Abunader 1
Studies of paralarvae Decapodiformes in the Gulf of Mexico have been carried out mainly in the north, which limits our knowledge of their spawning and rearing habitats on a basin wide-level. This study aims to describe the species composition, abundance and distribution of Decapodiformes paralarvae throughout the southern Gulf of Mexico (SGM) based on the morphological and molecular (cytochrome c oxidase subunit I gene, COI) identification. Paralarvae were stored from 263 plankton tows made in four oceanographic cruises held between 2015 and 2018. A total of 571 paralarvae were identified based on morphological characters, and 187 individuals were sequenced. Both approaches revealed the presence of 10 families: Enoploteuthidae, Loliginidae, Onychoteuthidae, Ommastrephidae, Ancistrocheiridae, Pyroteuthidae, Octopoteuthidae, Chiroteuthidae, Cranchiidae, and Thysanoteuthidae. Eight species were identified with both approaches: Abralia redfieldi, Doryteuthis pleii, Onychoteuthis banksii, Ornithoteuthis antillarum, Ancistrocheirus lesueurii, Sthenoteuthis pteropus, Onychoteuthis prolata and Enoploteuthis spp. An additional eight taxa were identified based on their morphology but couldn’t be corroborated with COI likely due to problems with the preservation of the DNA: Onychoteuthis compacta, Chiroteuthis sp.1, Thysanoteuthis rhombus, Liocranchia reinhardti, Abraliopsis sp.1, Pterygioteuthis gemmata, Pterygioteuthis sp.1, and Hyaloteuthis pelagica. One specimen only identified using COI, represents the first record of Ommastrephes caroli for the Gulf of Mexico. Most specimens (97.4 %) were relatively small (3.0-9.6 mm mantle length), which reflects recent spawning. Abralia redfieldi was the most abundant and widely
distributed in the SGM. This study provides new information on paralarvae of Decapodiformes in the SGM and sets the basis for further ecological studies.
Palabras clave: Integrative taxonomy; COI; spawning.
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