Sepiella inermis (Van Hasselt, 1835 in Férussac and D'Orbigny, 1834-1848) — Details

Cuttlefish learn more about names for this taxon

Overview

Distribution

Range Description

This species has a very wide geographic distribution that ranges from Mozambique up along the east coast of Africa, and the coastline of Central and Southeast Asia as far as Indonesia (Java and Kalimantan) (Reid et al. 2005). Its distribution includes the Gulf of Aden, Red Sea, The Gulf, Arabian Sea, Bay of Bengal, Andaman Sea, Gulf of Thailand, South and East China Seas, and Philippines (Reid et al. 2005).
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species has a shallow depth distribution (up to 40 m in depth) and feeds on a range of prey including fish, crustaceans and cephalopods (Reid et al. 2005). Females attain the largest body sizes (Reid et al. 2005). Off India individuals along the west coast mature and attain larger body sizes (up to 120 mm in mantle length) compared to those on the east coast (up to 110 mm in mantle length) (Reid et al. 2005). It is abundant in the Gulf of Thailand with most individuals ranging between 20 and 80 mm in mantle length (Reid et al. 2005). Spawning occurs throughout the year with spawning peaks from June to September and from November to December in northeast India; further south near Chennai (Madras) they occur in March, September and December; and in April, and September to October in southwest India (Reid et al. 2005). Most individuals spawn at between 9 and 12 months on the east coast of India and 18 months along the west coast (Reid et al. 2005). Life span is estimated at 24 months for individuals off the east coast of India and more than 24 months along the west coast (Reid et al. 2005). The black, circular eggs are spawned singly and hatch in 12.6 days at 28ºC (Reid et al. 2005). The young are briefly planktonic before taking up the adult mode after several days (Reid et al. 2005). This species has been raised successfully for several generations in aquaculture; females mature at 60 days, spawn at 87 days (producing approximately 500 eggs) and die at approximately 116 days (Reid et al. 2005). All species of Sepiella have a special gland at the tip of the mantle (Norman 2003). Its function is unknown but may have a defensive role (Norman 2003).

Systems
  • Marine
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shelf
  • UNESCO-IOC Register of Marine Organisms
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Depth range based on 3 specimens in 1 taxon.

Environmental ranges
  Depth range (m): 30 - 160

Graphical representation

Depth range (m): 30 - 160
 
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Sepiella inermis

The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Statistics of barcoding coverage: Sepiella inermis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1
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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
Valinassab, T., Herdson, R. & Duncan, C.

Justification
Sepiella inermis has been assessed as Data Deficient as this species may consist of a species complex. This species was overfished in the northwest area of India and in order to assess the impact of localised fisheries, it is essential that the taxonomy is clarified.
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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 may consist of a species complex (Reid et al. 2005). It forms a commercially important fishery species in some regions of its distribution range (Reid et al. 2005). Off northwest India intensive fishing pressure led to a decline in stocks leading to discussions to regulate the fishery in order to prevent overexploitation (Reid et al. 2005).
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Management

Conservation Actions

Conservation Actions
Off northwest India overfishing of this species has led to discussions to regulate the fishery (Reid et al. 2005).
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Wikipedia

Sepiella inermis

Sepiella inermis, common name spineless cuttlefish, is an edible species of cuttlefish.[1]

References

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