|Scientific Name:||Galeus piperatus|
|Species Authority:||Springer & Wagner, 1966|
|Taxonomic Notes:||Distinct, but not easily separable from the Galeus arae complex of the Western Atlantic (Springer 1979, Compagno 1984).|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Reviewer(s):||Kyne, P.M., Stevens, J., Pollard, D., Dudley, S. & Cavanagh, R.D. (Shark Red List Authority)|
Galeus piperatus is a common catshark with a restricted distribution in the northern Gulf of California in depths of 130 to 1,326 m. This is a small oviparous shark reaching a maximum size of 36 cm total length. This shark is not targeted nor generally caught as bycatch in fisheries, (although it has been found to be part of the bycatch in the hake surveys currently taking place in the Gulf of California). Despite its limited geographic range, in the absence of any identifiable threats to its population, Galeus piperatus is assessed as Least Concern. Future expansion of deepwater demersal trawling in the Gulf of California will require monitoring.
|Range Description:||Restricted geographical range in the northern Gulf of California. North of the city of Guaymas, Sonora (Mathews 1975, Compagno 1984) and deeper waters of the vicinity of Isla Tiburon (F. Marquez, unpublished data).|
|FAO Marine Fishing Areas:||
Pacific – eastern central
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Unknown, but reported to be abundant within the Gulf of California. Appears to be more abundant in summer months (June to August) compared to sampling in winter months (February to March) (Mathews 1975).|
|Habitat and Ecology:||
Galeus piperatus is a deepwater species recorded from depths of 130 to 1,326m, with specimens most commonly caught at 170 to 420 m (Mathews 1975). It is primarily a demersal species but has been taken up to 100 m off the bottom at night (Mathews 1975).
Little is known about the biology of this species. Development is reported to be oviparous with females producing eggcases of ~35 mm in length. Sexual maturity in females is reached at ~18 cm TL with a maximum size of 37 cm TL. Pups hatch at a size of ~7 to 8 cm TL (Mathews 1975). Data on its size/sex structure and maturity is currently being processed (F. Marquez, unpublished data).
It is thought to undergo seasonal migrations related to breeding and although details are not known these may involve movements into deeper waters during winter, which would also involve geographical movement out of the extreme northern Gulf of California (Mathews 1975).
Life history parameters
Age at maturity (years): Unknown.
Size at maturity (total length): Female: 18 cm TL (Mathews 1975); Male: unknown.
Longevity (years): Unknown.
Maximum size (total length): 37 cm TL (O. Sosa, unpublished data).
Size at birth: ~7 to 8 cm TL (Hubbs and Taylor 1969, Compagno 1984).
Average reproductive age (years): Unknown.
Gestation time (months): Unknown.
Reproductive periodicity: Unknown.
Average annual fecundity or litter size: Unknown.
Annual rate of population increase: Unknown.
Natural mortality: Unknown.
Its deepwater habitat generally precludes it from capture in fisheries operating in the Gulf of California. Future expansion of deepwater demersal trawling in the northern Gulf of California would require monitoring.
|Citation:||Heupel, M.R. 2006. Galeus piperatus. The IUCN Red List of Threatened Species. Version 2015.2. <www.iucnredlist.org>. Downloaded on 28 August 2015.|
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