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Glyphis glyphis, Speartooth shark
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Elasmobranchii (sharks and rays) >
Carcharhiniformes
(Ground sharks) >
Carcharhinidae
(Requiem sharks)
Etymology:
Glyphis:
Tautonymous with
Carcharias glyphis
Müller & Henle 1839. (
See ETYFish
)
;
glyphis:
Greek for knife, referring to how anterior lower teeth are serrated and flare outward, arrowhead-like, before coming to a sharp point. (
See ETYFish
)
.
More on authors:
Müller
&
Henle
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; freshwater; brackish; demersal. Tropical; 5°N - 21°S
Western Pacific: northern Australia and New Guinea (Ref.
84281
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 100.0 cm TL male/unsexed; (Ref.
244
); 175.0 cm TL (female)
Found presumably inshore. Largest whole specimen collected was that of a female with maturity unknown, 175 cm TL. Large sets of jaws examined indicate that size can attain up to 2 m and possibly 3 m (Ref.
76952
). Viviparous (Ref.
50449
). Biology poorly known.
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Distinct pairing with embrace (Ref.
205
). Viviparous, placental (Ref.
50449
).
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
)
IUCN Red List Status (Ref.
130435
)
Vulnerable (VU)
(C1); Date assessed:
20 April 2021
CITES
Appendix II:
International trade monitored
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: of no interest
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Zoological Record
Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00468 (0.00218 - 0.01003), b=3.09 (2.92 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 4.2 ±0.7 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153
): Very high vulnerability (90 of 100).
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mrius-barile
- 20 July 2016
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