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Reproductive Behavior of Sepioteuthis australis

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#1 glen


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Posted 16 December 2003 - 11:22 AM

Hi everyone, came across this full text article on the Cephbase site. It will be of interest to Australian and NZ squid fishers interested in how southern calamary reproduce (includes some nice squid photos).


Reproductive Behavior in the Squid Sepioteuthis
australis From South Australia: Interactions
on the Spawning Grounds

School of Biological Sciences, Flinders University
Reference: Biol. Bull. 204: 305–317. (June 2003)


Squid behavior is synonymous with distinctive
body patterns, postures, and movements that constitute a
complex visual communication system. These communications
are particularly obvious during reproduction. They are
important for sexual selection and have been identified as a
potential means of species differentiation. Here we present
a detailed account of copulation, mating, and egg deposition
behaviors from in situ observations of the squid Sepioteuthis
australis from South Australia. We identified four mating
types from 85 separate mating attempts: “Male-upturned
mating” (64% of mating attempts); “Sneaker mating”
(33%); “Male-parallel” (2%); and “Head-to-head” (1%).
Intervals between successive egg deposition behaviors were
clearly bimodal, with modes at 2.5 s and 70.0 s. Ninety three
percent of egg capsules contained 3 or 4 eggs (mean =
3.54), and each egg cluster contained between 218 and 1922
egg capsules (mean = 893.9). The reproductive behavior of
S. australis from South Australia was different from that
described for other cephalopod species. More importantly,
comparison between these results and those for other populations
of S. australis suggests that behavior may differ
from one population to another.
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