Mating pattern and multiple paternity of <i>Octopus sinensis</i> by artificial breeding

DOI

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Other Title
  • 飼育下におけるマダコの交接行動と複数父性

Abstract

<p> Octopus sinensis were mated, spawned, and hatched in an aquarium. Paternity was estimated by paternity testing to establish the reproductive ecology of the octopus. The durations varied in length: 8-140 days from the start of the mating test to the spawning of the female individual, 23-68 days from the start of spawning to the start of hatching of the paralarvae, and 6-24 days for the hatching period. The mating durations varied from 283 to 6277 seconds, and the number of male arch and pump movements varied from five to 25, showing differences by individuals. The paternity test confirmed the existence of multiple paternity in the octopus, while differences were confirmed in the proportions of each paternity in the hatched octopuses. In addition, many of the females used in the test had already mated with multiple males in natural waters and had stored sperm. Since there were no significant differences in the paternity ratio of the offspring octopuses on each hatching day, it is possible that the sperm of each male that mated with a female was well mixed in the female’s body, from mating to spawning.</p>

Journal

  • Aquaculture Science

    Aquaculture Science 70 (2), 131-140, 2022

    Japanese Society for Aquaculture Science

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