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Tetrapturus pfluegeri, Longbill spearfish : fisheries, gamefish
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Tetrapturus pfluegeri
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Teleostei (teleosts) >
Carangiformes
(Jacks) >
Istiophoridae
(Billfishes)
Etymology:
Tetrapturus:
Greek, tetra = four + Greek, pteron, fin, wing (Ref.
45335
)
.
More on authors:
Robins
&
de
Sylva
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; pelagic-oceanic; oceanodromous (Ref.
51243
); depth range 0 - 200 m (Ref.
43
), usually 100 - ? m (Ref.
4770
). Subtropical; 44°N - 33°S, 98°W - 17°E (Ref.
43
)
Atlantic Ocean: widely distributed in offshore waters, much more densely so in the western than in the eastern Atlantic. Highly migratory species.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 254 cm FL male/unsexed; (Ref.
40637
); common length : 165 cm OT male/unsexed; (Ref.
43
); max. published weight: 58.0 kg (Ref.
40637
)
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 50-57;
Anal
spines
: 0;
Anal
soft rays
: 18 - 21;
Vertebrae
: 24. Blue-black above, silvery white splattered with brown on the sides, silvery white below; dorsal fins dark blue; pectorals blackish brown, occasionally with tinges of greyish white; pelvic fins blue-black with a black fin membrane; 1st anal fin dark blue with silvery white at base; 2nd anal fin blackish brown.
Oceanic species, chiefly found in offshore waters, usually above the thermocline. Feed mainly on pelagic fishes and squids (Ref.
4770
). Females probably spawn once a year (Ref.
4770
). Marketed frozen.
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Maturation seems to occur at the same time rather than in the same season both in the northern and southern hemisphere, which could be suggestive of homogeneity of the population of this species. Females probably spawn once a year (Ref.
4770
).
Nakamura, I.
, 1985. FAO species catalogue. Vol. 5. Billfishes of the world. An annotated and illustrated catalogue of marlins, sailfishes, spearfishes and swordfishes known to date. FAO Fish. Synop. 125(5):65p. Rome: FAO. (Ref.
43
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
15 September 2010
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: minor commercial; gamefish: yes
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Estimates based on models
Preferred temperature (Ref.
123201
): 14.1 - 23.7, mean 18.2 °C (based on 140 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5630 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00447 (0.00193 - 0.01034), b=3.14 (2.94 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 4.4 ±0.4 se; based on diet studies.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Assuming tm=2-4).
Fishing Vulnerability (Ref.
59153
): Very high vulnerability (90 of 100).
Climate Vulnerability (Ref.
125649
): High to very high vulnerability (65 of 100).
Price category (Ref.
80766
):
Low
.
Nutrients (Ref.
124155
): Calcium = 37.9 [17.3, 66.4] mg/100g; Iron = 1.05 [0.60, 1.83] mg/100g; Protein = 19.7 [18.5, 20.8] %; Omega3 = 0.231 [0.124, 0.428] g/100g; Selenium = 44.6 [22.8, 89.1] μg/100g; VitaminA = 5.4 [1.7, 17.5] μg/100g; Zinc = 0.368 [0.250, 0.552] mg/100g (wet weight);
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