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Sphyrna zygaena (Linnaeus, 1758)

Smooth hammerhead
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Native range | All suitable habitat | Point map | Year 2050
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Sphyrna zygaena   AquaMaps   Data sources: GBIF OBIS
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Mauritius country information

Common names: Hammerhead shark, Requin marteau, Requin marteau lisse
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Records of S. zygaena from Mauritius need verification; they may have been based on S. mokarran (Ref. 33390). Also Ref. 5503.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/mp.html
National Fisheries Authority: http://ncb.intnet.mu/fishco/index.htm
Occurrences: Occurrences Point map
Main Ref: Baissac, J. de B., 1990
National Database:

Common names from other countries

Классификация / Names народные названия | синонимы | Catalog of Fishes(род, виды) | ITIS | CoL | WoRMS | Cloffa

Пластиножаберные (акулы и скаты) (sharks and rays) > Carcharhiniformes (Ground sharks) > Sphyrnidae (Hammerhead, bonnethead, or scoophead sharks)
Etymology: Sphyrna: Probable misspelling of sphyra (Gr.), hammer, referring to their hammer-shaped heads. (See ETYFish);  zygaena: zygaina, ancient Greek name for hammerhead sharks, derived from zygon, yoke, alluding to yoke-like shape of cephalofoil. (See ETYFish).
  More on author: Linnaeus.

Environment: milieu / climate zone / depth range / distribution range экология

морской; солоноватоводный; мигрирует в океане (Ref. 13562); пределы глубины 0 - 200 m (Ref. 5578), usually 0 - 20 m (Ref. 55303).   Subtropical; 59°N - 55°S, 180°W - 180°E

распространение страны | регионы FAO | Ecosystems | места находок | Point map | интродукции | Faunafri

Widespread in temperate and tropical seas (Ref. 13562). Western Atlantic: Canada to the Virgin Islands; Brazil to Argentina. Eastern Atlantic: British Isles to Côte d'Ivoire, including the Mediterranean. Indo-Pacific: South Africa to Sri Lanka; southern Siberia to Viet Nam (Ref. 13562); southern Australia, New Zealand, and Hawaii (Ref. 13562). Eastern Pacific: northern California, USA to Chile.

Length at first maturity / Size / Вес / Возраст

Maturity: Lm 250.0, range 265 - ? cm
Max length : 500 cm TL самец/пол неопределен; (Ref. 35388); common length : 335 cm TL самец/пол неопределен; (Ref. 13562); наибольший вес (опубликованные данные): 400.0 kg (Ref. 9987); наибольший возраст (опубликованны данные): 21 годы (Ref. 116211)

Краткое описание определительные ключи | морфология | морфометрия

колючие лучи спинного плавника (общее число) : 0; колючие лучи анального плавника: 0. A large hammerhead without a notch at the center of the curved headhead (Ref. 58085); but with prominent lateral indentations; prenarial grooves well-developed; snout short, 1/5 to less than a third of head width; mouth broadly arched (Ref. 114967); the first dorsal fin is moderately high, the second dorsal and pelvic fins are low. Colour olive-grey or dark grey above, white below, and the undersides of the pectoral fin tips dusky (Ref. 58085).

биология     глоссарий (например epibenthic)

Occurs inshore and well offshore (Ref. 5578), over continental and insular shelves (Ref. 244). Coastal, pelagic, and semi-oceanic, but often bottom associated at 1-139 m (Ref. 58302). Migrates northward in summer; young often in large aggregations of hundreds of individuals (Ref. 13562). Prefers to feed on small sharks, skates and stingrays, but also preys on bony fishes, shrimps, crabs, barnacles and cephalopods (Ref. 244). Viviparous (Ref. 50449). Regarded as being dangerous to people, though only few can be tentatively attributed to this species due to its occurrence in temperate waters (Ref. 244). Reported to cause poisoning (Ref. 4690). Caught occasionally by shark and tuna longline fisheries (Ref.58048). Meat utilized fresh, dried-salted, and possibly smoked for human consumption; liver oil for vitamins, fins for soup, hide for leather, and carcasses for fishmeal (Ref. 244). Used in Chinese medicine (Ref. 12166). Become sexually mature when 250 to 300 cm long. The female gives birth to 30 - 40 young (Ref. 35388).

Life cycle and mating behavior Maturities | размножение | Spawnings | Egg(s) | Fecundities | личинки

Viviparous, placental (Ref. 50449), with 20 to 50 young per litter (Ref. 6871)after a gestation period of 10-11 months (Ref.58048). Size at birth between 50-60 cm TL (Ref. 13562).

Основная ссылка Upload your references | ссылки | координатор : Compagno, Leonard J.V. | соавторы

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)

Статус Красного Списка МСОП (Ref. 130435)

  уязвимый; см. Красный Список МСОП (VU) (A2bd); Date assessed: 08 November 2018

CITES (Ref. 128078)


Угроза для людей

  Traumatogenic (Ref. 244)




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дополнительная информация

Trophic ecology
пищевые объекты
Diet compositions
Food consumptions
Food rations
хищники
Ecology
экология
Home ranges
Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Размерный состав
Mass conversions
Recruitments
Abundances
Life cycle
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Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
личинки
динамика численности личинок
Anatomy
Gill areas
мозг
Otoliths
Physiology
Body compositions
Nutrients
Oxygen consumptions
Swimming type
Swimming speeds
Visual pigment(s)
звуки, издаваемые рыбами
Diseases / Parasites
Toxicities (LC50s)
Genetics
генетика
Electrophoreses
Heritabilities
Human related
Aquaculture systems
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Estimates based on models

Preferred temperature (Ref. 115969): 11.8 - 28.9, mean 26.5 (based on 3124 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5029   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00398 (0.00298 - 0.00532), b=3.08 (3.00 - 3.16), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
Trophic level (Ref. 69278):  4.9   ±0.5 se; based on diet studies.
устойчивость к внешним воздействиям (Ref. 120179):  низкий, минимальное время удвоения популяции 4.5-14 лет (tmax=21; tm=8.8; Fec=20-40).
Prior r = 0.28, 95% CL = 0.19 - 0.42, Based on 1 data-limited stock assessment.
Fishing Vulnerability (Ref. 59153):  High to very high vulnerability (68 of 100).
Climate Vulnerability (Ref. 125649):  Moderate vulnerability (38 of 100).
Категория цены (Ref. 80766):   Low.