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Agrostichthys parkeri, Streamer fish
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Agrostichthys parkeri
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SFSA
Teleostei (teleosts) >
Lampriformes
(Velifers, tube-eyes and ribbonfishes) >
Regalecidae
(Oarfishes)
Etymology:
Agrostichthys:
Greek, agros = field, country + Greek, ichthys = fish (Ref.
45335
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; pelagic-oceanic. Temperate; 25°S - 59°S (Ref.
92949
)
Southern Oceans: collected relatively neaer the surface over or near the continental slope of New Zealand, Australia (with Tasmania), southern Namibia, and Argentina (including Falkland Is or Malvinias.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 300 cm TL male/unsexed; (Ref.
4171
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 2 - 7;
Anal
spines
: 0;
Anal
soft rays
: 0. Distinguished in having just 6 to 9 gill rakers on the first gill arch, 8 to 11 pectoral fin rays, and just 2 caudal fin rays. Start of the dorsal fin having 1 to 3 simple elongated rays, apparently never ornamented; not forming a single or double crest but are membranously joined to each other as well as to the dorsal fin. No cristophore. Head is shallow, with gently sloping snout. (Ref.
92949
). Body silvery in color. Dorsal fin rose-colored and with more than 400 soft rays (Ref.
4171
). Opercular bones well-developed. Small, protrusible mouth, without visible teeth; premaxilla extending forward along dorsal profile of head; axis of maxilla oblique. Skin of fragmented body naked, studded with numerous hard tubercles. Lateral line runs along sides consisting of a chain of oblong plates to form a continuous tube (Ref.
43600
).
Rare species, known from only seven specimens. Occurs in the open ocean habitat (Ref.
4171
). Found only in the southern oceans from 25°S to 59°S. Apparently also capable of autotomy, unique amongst lampridiforms. Early life history stages (eggs and larvae) unknown. Predators, prey, and parasites unknown (Ref.
92949
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Heemstra, P.C.
, 1986. Regalecidae. p. 403. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref.
4171
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
11 October 2018
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 6.4 - 13.4, mean 9.5 °C (based on 127 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 1.1250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), in cm total length, based on all LWR estimates for this body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153
): Very high vulnerability (90 of 100).
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- 20 July 2016
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