Plasticity in the reproductive strategies of the Southern Ocean ommastrephid squid Todarodes filippovae : a morphometric, lipid and fatty acid approach ...
Squid are important trophic links and integral components of the marine ecosystem in the Southern Ocean. Moreover, their life histories have been shown to be extremely plastic thus enabling them to respond quickly to changes in the environment. As a result squid are able to survive and reproduce wit...
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| Format: | Thesis |
| Language: | unknown |
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University Of Tasmania
2023
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| Online Access: | https://dx.doi.org/10.25959/23230484 https://figshare.utas.edu.au/articles/thesis/Plasticity_in_the_reproductive_strategies_of_the_Southern_Ocean_ommastrephid_squid_Todarodes_filippovae_a_morphometric_lipid_and_fatty_acid_approach/23230484 |
| Summary: | Squid are important trophic links and integral components of the marine ecosystem in the Southern Ocean. Moreover, their life histories have been shown to be extremely plastic thus enabling them to respond quickly to changes in the environment. As a result squid are able to survive and reproduce without the threat of population collapse or annihilation. An examination of female reproductive plasticity in the poorly understood ommastrephid species, Todarodes fifippovae, revealed both annual variation in condition and gonad investment. This was most likely due to differing oceanographic conditions between the years and seasons investigated. Furthermore, higher gonad investment in females caught in the winter was possibly due to the fact that spawning coincided with the forthcoming spring bloom. It is suggested that T. fifippovae may spawn in a number of slope and seamount regions across its distributional range. On the terminal versus multiple spawning continuum, results from this study suggested that T. ... |
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