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Reproductive capacity of a marine species (Octopus tetricus) within a recent range extension area


Ramos, JE and Pecl, GT and Semmens, JM and Strugnell, JM and Leon, RI and Moltschaniwskyj, NA, Reproductive capacity of a marine species (Octopus tetricus) within a recent range extension area, Marine and Freshwater Research, 66, (11) pp. 999-1008. ISSN 1323-1650 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 CSIRO

DOI: doi:10.1071/MF14126


To persist in the face of environmental change, species must adjust to the new conditions or change their geographical distribution, e.g. by range extension. Success for individuals within a zone of range extension requires the new environment to support their capacity to produce viable gametes and survival of the offspring. Reproductive characteristics of the polewards range-shifting Octopus tetricus were examined within the new range off north-eastern Tasmania, Australia, to assess whether it is likely to successfully establish in this extended area of its range. Approximately 44% of captured males and 14% of captured females were mature. Mature females with developing eggs were found throughout the year. Greater numbers of mature females were observed during the austral summer and spring, whereas mature males were observed all year round. Fecundity was high and developing embryos appeared to be viable. Our results suggest that O. tetricus is successfully reproducing beyond its historical range, the reproductive cycle is timed to favourable environmental conditions, and the population has the potential to be self-sustainable. The reproductive biology of O. tetricus may thus facilitate the establishment and prevalence of the population into new environments beyond the known historical distribution.

Item Details

Item Type:Refereed Article
Keywords:East Australian current, fecundity, population dynamics, population establishment, range shift, ocean warming
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture and fisheries stock assessment
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Wild caught edible molluscs
UTAS Author:Ramos, JE (Mr Jorge Ramos Castillejos)
UTAS Author:Pecl, GT (Professor Gretta Pecl)
UTAS Author:Semmens, JM (Professor Jayson Semmens)
UTAS Author:Leon, RI (Mr Rafael Leon)
ID Code:101194
Year Published:2015
Web of Science® Times Cited:13
Deposited By:IMAS Research and Education Centre
Deposited On:2015-06-11
Last Modified:2017-11-04

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