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Batch or trickle: understanding the multiple spawning strategy of southern calamary, Sepioteuthis australis (Mollusca: Cephalopoda)
Citation
Kuipers, MR and Pecl, GT and Moltschaniwskyj, NA, Batch or trickle: understanding the multiple spawning strategy of southern calamary, Sepioteuthis australis (Mollusca: Cephalopoda), Marine and Freshwater Research, 59, (11) pp. 987-997. ISSN 1323-1650 (2008) [Refereed Article]
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Copyright Statement
Copyright © 2008 CSIRO
Official URL: http://www.publish.csiro.au/
DOI: doi:10.1071/MF07200
Abstract
Many cephalopods are ‘multiple spawners’; however, we know little about the timing and dynamics of
egg production. This has implications for the allocation of energy to reproduction, lifetime fecundity and subsequent
recruitment. The current study aimed to determine if Sepioteuthis australis (Quoy and Gaimard, 1832), which spawns
multiple times, produces mature oocytes for deposition in a continuous trickle or in larger discrete batches. Throughout
a spawning season, developmental stages were assigned to the ovaries of each female by combining macroscopic and
histological analyses of the oocytes. Half of the females (46%) showed a significant peak in oocytes at one of the maturation
stages, indicating that females were developing eggs in batches. It was hypothesised that the remaining females were also
batch spawning, given that the oviductweights of the remaining females (54%)were high and the other measured biological
characteristics were similar to those of the females showing a peak in oocyte stage.Average batch fecundity declined over
the 3-month spawning season, but total egg numbers in the ovary increased, suggesting that females might have deposited
small batches more often during December. As reproduction requires large allocations of energy, understanding how
females distribute reproductive effort throughout their lives is crucial to understanding the behaviour of populations,
individuals and their offspring.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Agricultural and Veterinary Sciences |
| Research Group: | Fisheries Sciences |
| Research Field: | Aquaculture |
| Objective Division: | Animal Production and Animal Primary Products |
| Objective Group: | Fisheries - Aquaculture |
| Objective Field: | Aquaculture Molluscs (excl. Oysters) |
| UTAS Author: | Kuipers, MR (Mr Matthew Kuipers) |
| UTAS Author: | Pecl, GT (Professor Gretta Pecl) |
| UTAS Author: | Moltschaniwskyj, NA (Associate Professor Natalie Moltschaniwskyj) |
| ID Code: | 54343 |
| Year Published: | 2008 |
| Web of Science® Times Cited: | 2 |
| Deposited By: | NC Marine Conservation and Resource Sustainability |
| Deposited On: | 2009-02-18 |
| Last Modified: | 2009-07-27 |
| Downloads: | 1 View Download Statistics |
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