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Brachionichthys hirsutus, Spotted Handfish
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Brachionichthys hirsutus
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Teleostei (teleosts) >
Lophiiformes
(Anglerfishes) >
Brachionichthyidae
(Handfishes)
Etymology:
Brachionichthys:
Latin, bracchium = arm + Greek, ichthys = fish (Ref.
45335
)
;
hirsutus:
Name from Latin 'hirsutus' for hairy, in reference to its rough, hairy skin.(Ref. 82446).
.
More on author:
Lacepède
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; non-migratory; depth range 1 - 60 m (Ref.
72490
), usually 5 - 15 m (Ref.
72490
). Temperate; 41°S - 44°S, 147°E - 149°E
Southwest Pacific: Endemic to Tasmania, Australia. Has been nearly wiped out by an introduced starfish which preys on its egg clusters (Ref.
27438
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 15.0 cm TL male/unsexed; (Ref.
7300
)
Short description
Morphology
|
Morphometrics
Dorsal
soft rays
(total): 19-21;
Anal
soft rays
: 8 - 10. This species is unique in having the following set of characters: esca small, 15-26% (mean 20%) of illicium length (including esca); illicium very slender, no dermal spinules, length 19-20% SL (mean 20%), 2.3-2.4 times in head length; eye moderate, exceeding 5.4 times in head; body entirely covered with close-set, non-imbricate scales; scale bases subcircular with long unicuspid spinules (except for those closely-associated with pores of the acoustico-lateralis system); spinules originating from middle of scale base, variable in length over body; second dorsal-fin rays 17-19 (mean 18), fin base 61-64 (mean 62%) SL; first ray of first dorsal fin length 0.7-1.0 times length of longest ray of second dorsal fin; anal-fin rays 8-10; pectoral-fin rays usually 7 ; upper body usually covered with fine dark spots or short streaks (rarely with long streaks on head); caudal fin with dense coverage of fine spots, forming a dark submarginal bar in juveniles (Ref.
72490
).
Occurs in the continental shelf and inshore waters (Ref.
7300
). Occurs in coarse to fine sand habitats in depths of 5-40 m (most commonly 5-10 m). Often found in shallow, shell-filled depressions or near rocks of low relief projecting from the substrate (Ref.
30684
). Length only preliminary, replace with better value (RF). Egg masses contain about 80-250 eggs, about 1.8-2 mm in diameter; egg capsules about 3-4 mm diameter. Newly hatched juveniles are about 6-7 mm SL, attaining at least 9.0 cm SL (about 13.0 cm TL), with adults commonly about 6.0-7.5 cm SL (Ref.
72490
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Paxton, J.R., D.F. Hoese, G.R. Allen and J.E. Hanley
, 1989. Pisces. Petromyzontidae to Carangidae. Zoological Catalogue of Australia, Vol. 7. Australian Government Publishing Service, Canberra, 665 p. (Ref.
7300
)
IUCN Red List Status (Ref.
130435
)
Critically Endangered (CR)
(B1ab(iii,v)); Date assessed:
30 April 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
): 13.5 - 21.2, mean 15.8 °C (based on 68 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.7501 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.3 ±0.39 se; based on food items.
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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- 20 July 2016
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