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Myliobatis hamlyni, Purple eagle ray
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Elasmobranchii (sharks and rays) >
Myliobatiformes
(Stingrays) >
Myliobatidae
(Eagle and manta rays)
Etymology:
Myliobatis:
Greek, mylo = mill + Greek, + Greek, batis,-idos = a ray (Raja sp.) (Ref.
45335
)
.
More on author:
Ogilby
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; benthopelagic; depth range 200 - ? m (Ref.
6871
). Deep-water; 17°S - 26°S
Eastern Indian Ocean and Western Central Pacific: known from single specimens from off Forestier Island, Western Australia and Cape Moreton, Queensland in Australia. Possibly not distinct from
Myliobatis tobijei
or
Myliobatis aquila
; all three species need to be critically compared to determine if they are different species (Ref.
9862
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 48.0 cm WD male/unsexed; (Ref.
6871
)
Rare offshore species (Ref.
9862
). Ovoviviparous (Ref.
50449
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref.
50449
).
Last, P.R. and J.D. Stevens
, 1994. Sharks and rays of Australia. CSIRO, Australia. 513 p. (Ref.
6871
)
IUCN Red List Status (Ref.
130435
)
Near Threatened (NT)
; Date assessed:
17 February 2015
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00123 - 0.01235), b=3.08 (2.82 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.5 ±0.4 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 (83 of 100).
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mrius-barile
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