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Hyporhamphus affinis, Tropical halfbeak
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Tropical halfbeak
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Hyporhamphus affinis
Picture by
Randall, J.E.
Teleostei (teleosts) >
Beloniformes
(Needle fishes) >
Hemiramphidae
(Halfbeaks)
Etymology:
Hyporhamphus:
Greek, hypo = under + Greek, rhamphos = beak, bill (Ref.
45335
)
.
More on author:
Günther
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 0 - 6 m (Ref.
86942
). Tropical
Indo-Pacific: Red Sea and East Africa through the Indian Ocean islands to western Australia, New Guinea, Philippines, and islands of Oceania. Not found in Hawaiian islands, and apparently absent from Indo-Malayan Archipelago. Has been mentioned in the literature under other names, particularly
Hyporhamphus erythrorinchus
and
Hyporhamphus dussumieri
(Ref.
10943
).
Length at first maturity / Size / Weight / Age
Maturity: L
m
 
?
, range 13 - ? cm
Max length : 38.0 cm SL male/unsexed; (Ref.
54980
)
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 14-17;
Anal
spines
: 0;
Anal
soft rays
: 15 - 19;
Vertebrae
: 54 - 59. Body deep blue above, silvery stripe on side, silvery white below; caudal fin bluish, other fins unpigmented; tip and distal half of underside of lower jaw bright carmine red (Ref.
4164
).
Found chiefly around coral reefs (Ref.
58534
) and islands but extends a little further from shore than
Hyporhamphus (R.) dussumieri
which has a similar range (Ref.
10943
). Found in schools (Ref.
9710
). Feeds on zooplankton (Ref.
43448
) also small fishes and detritius organic matter (Ref.
89972
). Eggs covered with adhesive filaments to assist in attaching to floating and benthic objects (Ref.
43448
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Collette, B.B. and J. Su
, 1986. The halfbeaks (Pisces, Beloniformes, Hemiramphidae) of the Far East. Proc. Acad. Nat. Sci. Philadelphia 138(1):250-301. (Ref.
10943
)
IUCN Red List Status (Ref.
130435
)
Not Evaluated
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
): 24.6 - 29.3, mean 28.4 °C (based on 3280 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00257 (0.00115 - 0.00574), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.5 ±0.48 se; based on food items.
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Moderate vulnerability (36 of 100).
Nutrients (Ref.
124155
): Calcium = 209 [47, 470] mg/100g; Iron = 0.715 [0.260, 2.500] mg/100g; Protein = 18.2 [15.3, 20.6] %; Omega3 = 0.105 [0.048, 0.313] g/100g; Selenium = 21 [9, 55] μg/100g; VitaminA = 285 [74, 954] μg/100g; Zinc = 1.17 [0.47, 3.22] mg/100g (wet weight);
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