Habitat and Ecology
Water temperature and chemistry ranges based on 1 sample.
Depth range (m): 8.5 - 8.5
Temperature range (°C): 16.917 - 16.917
Nitrate (umol/L): 0.808 - 0.808
Salinity (PPS): 34.224 - 34.224
Oxygen (ml/l): 5.581 - 5.581
Phosphate (umol/l): 0.370 - 0.370
Silicate (umol/l): 0.969 - 0.969
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
Molecular Biology and Genetics
Barcode data: Jasus frontalis
There is 1 barcode sequence available from BOLD and GenBank. Below is the 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. Other sequences that do not yet meet barcode criteria may also be available.
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Download FASTA File
Statistics of barcoding coverage: Jasus frontalis
Public Records: 85
Specimens with Barcodes: 85
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria
Early documentation of this species describe it as 'abundant' around these Chilean Islands (Holthuis 1991). Conversely, later transactions show declines in population, from landings of 120 tonnes between 1952 and 1964 to ~12 tonnes between 1979-1980 (Arana and Vega 2000). More recently the FAO have documented an increase in annual catch in 1987 (32.7 tonnes) and 1988 (26.3 tonnes) (Holthuis 1991). Arana and Vega (2000) conducted a survey in 1996/7 and found that catch per unit effort varied between 0.53 and 0.59 lobsters per trap.
Further research is needed on the biomass and catch per unit effort of this fishery.
Jasus frontalis, known as the Juan Fernández rock lobster, is a species of spiny lobster in the genus Jasus, found around the Juan Fernández and Desventuradas Islands in the south-eastern Pacific Ocean.
Description and life cycle
Male adults of Jasus frontalis reach a maximum length of 48 centimetres (19 in) (carapace length 22 cm or 8.7 in), with females slightly smaller at 46 cm (18 in) long (carapace length 19 cm or 7.5 in). Females reach sexual maturity after around seven years, when they have reached a carapace length of 75–77 mm (3.0–3.0 in). Jasus frontalis differs from the other two species in its species group – Jasus tristani and Jasus paulensis – by the lack of sculpturation on the first abdominal somite.
Distribution and fishery
Jasus frontalis lives in the seas around the Juan Fernández Islands and the Desventuradas Islands, off the coast of Chile, at depths of 2–200 metres (7–656 ft), where the water is at a temperature of 13–19 °C (55–66 °F). The species was found to be plentiful and easily caught by early explorers who visited the area, such as Jacob Roggeveen (in 1722) and George Anson (in 1741). Today, J. frontalis is commercially fished throughout its range. The IUCN Red List states that while the catch has reportedly diminished and fishing efforts have increased, there is little quantifiable data on the catch per unit effort for estimating the conservation status and outlook for the species.
- R. Wahle, A. MacDiarmid, M. Butler & A. Cockcroft (2011). "Jasus frontalis". IUCN Red List of Threatened Species. Version 2013.1. International Union for Conservation of Nature. Retrieved September 30, 2013.
- Lipke B. Holthuis (1991). "Jasus (Jasus) edwardsii" (PDF). Marine Lobsters of the World. FAO Fisheries Synopsis No. 125. Food and Agriculture Organization. pp. 98–99. ISBN 92-5-103027-8.
- Andrew G. Jeffs, Caleb Gardner & Andy Cockroft (2013). "Jasus and Sagmariasus species". In Bruce Phillips. Lobsters: Biology, Management, Aquaculture & Fisheries (2nd ed.). John Wiley & Sons. doi:10.1002/9781118517444.ch9. ISBN 9781118517499.
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