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Sighting of Thysanoteuthis rhombus egg mass in Indonesian waters and observations of embryonic development

Published online by Cambridge University Press:  04 April 2001

V.C. Billings
Affiliation:
Operation Wallacea, Priory Lodge, Hagnaby, Spilsby, Lincolnshire, PE23 4BP, UK
M. Sullivan
Affiliation:
North West Biological Surveys, 19 Carton Bay, Sligo, Republic of Ireland
H. Vine
Affiliation:
English Nature, Ham Lane, Ortonwaterville, Peterborough, Cambridgeshire, PE2 5UR, UK

Abstract

The egg mass of the diamond-shaped squid, Thysanoteuthis rhombus (Oegopsidae: Thysanoteuthidae) was sighted in surface waters off south-east Sulawesi. It was a sinuous hollow tube-like structure about 2 m long and 0·15 m diameter. It was estimated to contain in the order of 180,000 purple eggs of 1 mm diameter with little or no yolk. Development of the embryos from early differentiation to hatching took between 47 and 57 h at about 28°C.

Type
Brief Report
Copyright
© 2000 Marine Biological Association of the United Kingdom

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