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Carcharhinus falciformis  (Müller & Henle, 1839)

Silky shark
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Native range | All suitable habitat | Point map | Year 2100
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Carcharhinus falciformis   AquaMaps   Data sources: GBIF OBIS
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Image of Carcharhinus falciformis (Silky shark)
Carcharhinus falciformis
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Australia country information

Common names: Silky shark, Silky whaler
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: of no interest | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Occurs off northern Australia (rare in the Gulf of Carpentaria), south to Lancelin in Western Australia and Sydney in New South Wales (Ref. 6871). Bycatch of Japanese tuna longliners in northern Australia who retain it for its fins (Ref. 6871). Also Ref. 2334, 7300, 9997.
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/as.html
National Fisheries Authority: https://www.csiro.au/
Occurrences: Occurrences Point map
Main Ref: Last, P.R. and J.D. Stevens, 1994
National Database:

Classification / Names

Elasmobranchii (sharks and rays) > Carcharhiniformes (Ground sharks) > Carcharhinidae (Requiem sharks)
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Main reference

Size / Weight / Age

Max length : 350 cm TL male/unsexed; (Ref. 9997); common length : 250 cm TL male/unsexed; (Ref. 9997); max. published weight: 346.0 kg (Ref. 40637); max. reported age: 25 years (Ref. 31395)

Length at first maturity
Lm 228.0, range 202 - 260 cm

Environment

Marine; reef-associated; oceanodromous (Ref. 51243); depth range 0 - 4000 m (Ref. 55180), usually 0 - 500 m (Ref. 6871)

Climate / Range

Subtropical; 23°C - 24°C (Ref. 244), preferred 27°C (Ref. 107945); 42°N - 43°S, 169°W - 180°E (Ref. 55180)

Distribution

Circumtropical. Western Atlantic: Massachusetts, USA to southern Brazil, including the Gulf of Mexico and the Caribbean Sea to Uruguay (Ref. 58839). Eastern Atlantic: Spain, Madeira to northern Angola; St. Paul's Rocks (Ref. 13121); Cape Verde (Ref. 34514). Indo-Pacific: scattered records from the Red Sea and Natal, South Africa (Ref. 5578) to China, New Zealand, and the Caroline, Hawaiian, Phoenix and Line islands. Eastern Pacific: southern Baja California, Mexico to northern Chile. Highly migratory species, Annex I of the 1982 Convention on the Law of the Sea (Ref. 26139).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Dorsal soft rays (total): 0; Anal spines: 0; Anal soft rays: 0. A large, slim shark with a moderately long, flat and rounded snout, large eyes, small jaws, and oblique-cusped teeth with serrations; 2nd dorsal fin low and with greatly elongated rear tip (Ref. 5578). Grey or bluish-grey above, white below; no conspicuous fin markings (Ref. 5578). Only Carcharhinus species with an interdorsal ridge that has the dorsal fin origin behind the free rear tip of the pectoral fin (Ref. 26938).

Biology     Glossary (e.g. epibenthic)

Found abundantly near the edge of continental and insular shelves, but also in the open sea and occasionally inshore (Ref. 244). Often found in deepwater reefs and near insular slopes (Ref. 244). Littoral and epipelagic, in the open sea or near the bottom at 18-500 m (Ref. 58302). It is quick-moving and aggressive (Ref. 244). Solitary (Ref. 26340); often associated with schools of tuna (Ref. 244). Feeds mainly on fishes, but also squid, paper nautiluses, and pelagic crabs (Ref. 244; 37816). Viviparous (Ref. 50449). Regarded as dangerous to humans (Ref. 9997). Flesh utilized fresh and dried-salted for human consumption; its hide for leather; its fin for shark-fin soup; its liver for oil (Ref. 244). 2 to 14 young, 73 to 87 cm, are born per litter (Ref. 1602).

IUCN Red List Status (Ref. 90363)

Threat to humans

  Traumatogenic (Ref. 9997)



Human uses

Fisheries: highly commercial

More information

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
4.5   ±0.0 se; Based on diet studies.

Resilience (Ref. 69278)
Very Low, minimum population doubling time more than 14 years (rm=0.054; K=0.05-0.15; tm=6-10; tmax=25; Fec=2-14)

Vulnerability (Ref. 59153)
Very high vulnerability (79 of 100)
Price category (Ref. 80766)
High