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Embryonic stages of the Patagonian squid Loligo gahi (mollusca: Cephalopoda)

AuthorsGuerra, Ángel ; Rocha, Francisco; González, Ángel F. ; Bückle, L. F.
Issue Date2001
PublisherCalifornia Malacozoological Society
CitationVeliger 44: 109-115 (2001)
AbstractThe embryonic development of Loligo gahi was observed from 4-day-old eggs to natural hatching. Egg strands spawned in the Valparaíso Bay, Chile, were transported to an open system tank for incubation. Temperatures ranged from 12.9°C to 13.5°C, salinities from 34‰ to 35‰, and the photoperiod was 12L:12D. The period from spawning to hatching ranged from 30-35 days. The diameter of individual eggs ranged from 2.5-3.2 mm, and the dorsal mantle length of hatchlings varied from 2.6-3.1 mm. The pattern of chronological appearance of organs was quite similar to loliginid species previously examined (Loligo aff. gahi, Loligo bleekeri, Loligo pealei, Loligo vulgaris reynaudii, and Loligo forbesii). However, L. gahi had a different (faster) development time and a smaller embryo and hatchling size than L. bleekeri (Japan) and L. forbesii (eastern Atlantic Ocean). Differences (heterochronies) among species are discussed. Allometric growth of embryonic development in L. gahi using seven morphometric parameters was undertaken.
Identifiersissn: 0042-3211
Appears in Collections:(IIM) Artículos
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