Montero-Ruiz, R.U., R., De Silva-Dávila, C.A., Amezcua-Gómez, A., Valdez-Cibrián & E.R., Kozak (2023). Description of the spawning, embryonic development, and paralarvae of the green octopus Octopus hubbsorum Berry 1953 (Cephalopoda:Octopodidae) under laboratory conditions. Roger Villanueva (Eds.), Marine Biology. 170: 116. DOI: 10.1007/s00227-023-04260-x.
Renato U. Montero-Ruiz 1, Roxana De Silva-Dávila 2, Carlos Alberto Amezcua-Gómez 3, Alejandra Valdez-Cibrián 1 y Eva R. Kozak 1
To improve early life stage identification of Octopus hubbsorum Berry 1953, embryonic development (stages I-XX), and complete morphological, morphometric, and meristic characters of its first day as a paralarvae are reported. Females were captured in Tenacatita Bay, Jalisco, Mexico (19°16'41.308? N–104°47'37.046?W) in September 2017 and October 2018 and transferred to the laboratory for subsequent acclimatization and egg laying. For the first time, spawning behavior of the females, the early organogenesis of the species (stages I–XIV), and some of the stages recently observed in Octopus vulgaris Cuvier, 1797 were described in our specimens. Embryonic development lasted 18–22 d (at 28.3 °C mean temperature) giving rise to paralarvae with 1.55 mm mantle length (ML) (preserved paralarvae). Characters reported for the first time in paralarvae of this species are: beak with serrated edges and slightly pigmented, the rest of the beak is translucent; 7–8 gill lamellae in each demibranch; seven radular teeth and two marginal plates; and a chromatophore pattern different from that previously proposed for the same species. The chromatophore patterns identified in the present study are very similar to that proposed for Octopus mimus Gould 1852, in part supporting previously published genetic results indicating that O. hubbsorum and O. mimus should be considered the same species.
Palabras clave: Cephalopod embryos; chromatophore pattern; taxonomy; Mexican Pacific
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