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Reproductive capacity of a marine species (Octopus tetricus) within a recent range extension area
journal contribution
posted on 2023-05-18, 10:59 authored by Jorge Ramos CastillejosJorge Ramos Castillejos, Gretta PeclGretta Pecl, Jayson SemmensJayson Semmens, Strugnell, JM, Rafael LeonRafael Leon, Moltschaniwskyj, NATo 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.
History
Publication title
Marine and Freshwater ResearchVolume
66Issue
11Pagination
999-1008ISSN
1323-1650Department/School
Institute for Marine and Antarctic StudiesPublisher
CSIRO PublishingPlace of publication
150 Oxford St, Po Box 1139, Collingwood, Australia, Victoria, 3066Rights statement
Copyright 2015 CSIRORepository Status
- Restricted