Short communication. Statolith microstructure from hatchlings of the oceanic squid, Gonatus onyx (Cephalopoda, Gonatidae) from the Northeast Pacific |
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| Authors: | Arkhipkin A; Seibel B |
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| Institution: | Atlantic Research Institute of Marine Fisheries and Oceanography (AtlantNIRO), 5 Dm. Donskoy Street, Kaliningrad, 236000, Russia; Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA 93106, USA |
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| Abstract: | Statolith microstructure was studied in hatchlings of deepwater-spawned
gonatid squid Gonatus onyx, caught between 1350 and
1420 m over a bottom depth of 2100 m in the San Clemente Basin off San
Diego, California. It was found that the shape and size of the hatchling
statolith were similar to those of the first-check statolith observed in
paralarvae and small juveniles of G.onyx. The inner
part of the bipartite postnuclear zone (= first-check statolith) is formed
during late embryo-genesis, and the first check within the statolith
microstructure must be considered as a starting point of increment counting
for age estimation of Gonatus spp.
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