Overview

Distribution

Central Indo-Pacific to Maldives
  • UNESCO-IOC Register of Marine Organisms
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Range Description

The shortclub cuttlefish (Sepia brevimana) has a wide geographic distribution ranging from India and Sri Lanka in the west to Indonesia in the east and north to the Philippines and Taiwan, Province of China (Reid et al. 2005). Its distribution includes the Bay of Bengal, Andaman Sea, Gulf of Thailand, South China Sea, Java Sea, Celebes Sea and Sulu Sea (Reid et al. 2005).
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Ecology

Habitat

shelf to slope
  • UNESCO-IOC Register of Marine Organisms
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Habitat and Ecology

Habitat and Ecology
The shortclub cuttlefish is a demersal species that inhabits coastal and shelf waters (Reid et al. 2005). The sex ratio of caught specimens is typically 1:2 (M:F) (Reid et al. 2005). Mantle lengths range between 40 and 70 mm; and maximally up to 85 (off northeast India) and 95mm (off southeast India) (Reid et al. 2005). Off India both sexes attain similar maximum mantle lengths (ML) at 50% maturity, for example off southeast India it was 56 (males) and 59 mm (females), and off northeast India it was 59 (males) and 63 mm (females) (Reid et al. 2005). In the Gulf of Thailand mantle length generally range between 40 and 60 mm, and maximally 90 mm (Reid et al. 2005). In eastern India spawning takes place all year with spawning peaks between July and February (Reid et al. 2005). Hatchlings reach adult sizes in approximately one year (Reid et al. 2005).

Systems
  • Marine
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2012

Assessor/s
Barratt, I. & Allcock, L.

Reviewer/s
Reid, A., Rogers, Alex & Bohm, M.

Contributor/s
Herdson, R. & Duncan, C.

Justification
Sepia brevimana has been assessed as Data Deficient. It is caught as bycatch off eastern India and there are fisheries off Thailand and in the South China Seas, but few catch data are available and population trends are not known.
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Population

Population
The population size of this species is unknown.

Population Trend
Unknown
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Threats

Major Threats
Ocean acidification caused by increased levels of carbon dioxide in the atmosphere is potentially a threat to all cuttlefish. Studies have shown that under high pCO2 concentrations, cuttlefishes actually lay down a denser cuttlebone which is likely to negatively affect buoyancy regulation (Gutowska et al. 2010). This species is caught as bycatch off eastern India (Reid et al. 2005). It is fished in the South China Sea and forms an important fishery in Thailand (Reid et al. 2005).
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Management

Conservation Actions

Conservation Actions
No conservation measures are currently needed for this species and none are in place. Further research is recommended regarding the population trends, life history traits, harvesting and threat impacts to this species.
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