Overview

Distribution

Range Description

This species is distributed along the eastern coast of Africa from Western Sahara (including the Canary Islands) and south to Angola (Reid et al. 2005).
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Ecology

Habitat

shelf
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© WoRMS for SMEBD

Source: World Register of Marine Species

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Habitat and Ecology

Habitat and Ecology
This species is a demersal species that shows sexual dimorphism in body size with males attaining a higher maximum mantle length compared to females (Reid et al. 2005). Furthermore, the mantle is wider and arms are longer in females (Reid et al. 2005). The geographic distribution of this species overlaps considerably with both Sepia officinalis and Sepia hierredda (Reid et al. 2005). Off the Canary Islands highest abundances occur between 70 and 140 m in depth (Reid et al. 2005). It is commonly captured off the western Endeavour Bank and migrates from here to shallow water to spawn in summer and autumn (Reid et al. 2005). In summer a range of sizes are present suggesting that either the spawning season is extended or at least some spawning occurs throughout the year (Reid et al. 2005).

Systems
  • Marine
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Depth range based on 16 specimens in 1 taxon.
Water temperature and chemistry ranges based on 5 samples.

Environmental ranges
  Depth range (m): 42 - 110
  Temperature range (°C): 16.349 - 19.665
  Nitrate (umol/L): 9.205 - 16.736
  Salinity (PPS): 35.642 - 35.721
  Oxygen (ml/l): 2.601 - 3.293
  Phosphate (umol/l): 0.713 - 1.091
  Silicate (umol/l): 2.879 - 6.183

Graphical representation

Depth range (m): 42 - 110

Temperature range (°C): 16.349 - 19.665

Nitrate (umol/L): 9.205 - 16.736

Salinity (PPS): 35.642 - 35.721

Oxygen (ml/l): 2.601 - 3.293

Phosphate (umol/l): 0.713 - 1.091

Silicate (umol/l): 2.879 - 6.183
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Sepia bertheloti

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


There are 3 barcode sequences available from BOLD and GenBank.

Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.

See the BOLD taxonomy browser for more complete information about this specimen and other sequences.

ACATTATATTTCATTTTCGGTATTTGATCAGGTTTATTAGGTACTTCATTA---AGATTAATAATTCGAAGAGAGCTTGGTAAACCAGGTACTCTTCTAAATGAT---GATCAACTTTATAATGTTGTAGTAACTGCCCACGGTTTTATTATAATTTTCTTTTTAGTTATACCAATTATAATTGGTGGCTTTGGTAATTGGTTAGTACCTTTAATA---TTAGGTGCACCTGATATAGCTTTTCCTCGAATAAATAATATAAGTTTTTGATTACTTCCTCCTTCACTAACCCTTTTATTATCTTCATCAGCTGTAGAAAGTGGTGCCGGAACAGGTTGAACAGTATACCCTCCCTTATCTAGTAATTTATCACATGCAGGCCCATCAGTAGATTTA---GCTATTTTCTCTTTACATTTAGCTGGTGTTTCCTCAATTCTAGGGGCAATTAATTTCATTACAACTATTTTAAATATACGATGAGAAGGCTTACAAATGGAACGACTACCTTTATTCGCTTGATCAGTTTTTATTACAGCTATTTTATTATTACTTTCCCTCCCTGTTTTAGCTGGC---GCTATTACAATATTATTAGCTGACCGAAACTTTAATACTACTTTCTTTGATCCGAGAGGTGGAGGTGATCCTATTTTATACCAACATTTATTTTGA
-- end --

Download FASTA File

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Source: Barcode of Life Data Systems (BOLD)

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Statistics of barcoding coverage: Sepia bertheloti

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 3
Species With Barcodes: 1
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Source: Barcode of Life Data Systems (BOLD)

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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 bertheloti has been assessed as Data Deficient. This species is trawled off northwest Africa alongside Sepia hierredda but it is a widespread species with a geographic range that extends beyond the region trawled, hence the fishery is likely to have local impacts only. However, in the absence of stock assessments it is difficult to assess whether this species is impacted.
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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 commonly caught alongside Sepia hierredda off Endeavour Bank (Reid et al. 2005). According to Spanish fishery statistics Sepia bertheloti forms about 10% of the catch compared to Sepia hierredda in Saharan waters (Reid et al. 2005). It forms a larger component further south in Mauritanian waters where it comprises about 35% of the catch, compared to 65% in Sepia hierredda (Reid et al. 2005).
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Management

Conservation Actions

Conservation Actions
Research is required into trends in population size and the impacts of harvesting.
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