Common names from other countries
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Clupeiformes (Herrings) >
Dorosomatidae (Gizzard shads and sardinellas)
Etymology: Herklotsichthys: After Janus Adrian Herklots, Australian ichthyologist, 1820-1872.
More on author: Rüppell.
Environment: milieu / climate zone / depth range / distribution range
Ecologia
marino; acqua dolce; salmastro associati a barriera corallina; distribuzione batimetrica 0 - 13 m (Ref. 82332). Tropical; 39°N - 33°S, 29°E - 166°W (Ref. 188)
Indo-Pacific: widespread in Indian Ocean and western Pacific, including entire eastern coast of Africa, Madagascar, Mauritius eastward to Japan, eastern Australia, and Samoa (Ref. 188). Introduced into Hawaii, apparently by accident, and now abundant (Ref. 188). At least one country reports adverse ecological impact after introduction.
Length at first maturity / Size / Peso / Age
Maturity: Lm 12.3, range 7 - 17 cm
Max length : 25.0 cm SL maschio/sesso non determinato; (Ref. 48635); common length : 10.0 cm SL maschio/sesso non determinato; (Ref. 188)
Spine dorsali (totale) : 0; Raggi dorsali molli (totale) : 16 - 23; Spine anali: 0; Raggi anali molli: 15 - 21. Diagnosis: Body slender, its depth 18 to 30% of standard length; presence of two fleshy outgrowths on the hind margin of the gill opening; sharp belly with keeled scutes, 16-19 pre-pelvic and 12-14 post-pelvic scutes (Ref. 188, 3259). The presence of elongate wing-like scales underneath the normal paired pre-dorsal scales separate it from all other species except the two Australian species with prominent black spots on the flank, Herklotsichthys koningsbergeri and Herklotsichthys Species A, and the unspotted Herklotsichthys Species B, which has dusky tips to dorsal and caudal fins and more lower gill rakers, 36-42 vs. 33-36 in H. quadrimaculatus (Ref. 188). Flank silvery with an electric blue line preceded by two orange spots (Ref. 188).
Adults form schools near mangroves, shallow coastal bays and lagoons during the day and moves further offshore into deeper water by night (Ref. 188, 48635); at depths of 0-13m (Ref. 58302, 82332). Known in mills around in large schools under wharves or along sandy beaches in protected bays (Ref. 26367). Pelagic (Ref. 58302). Feeds on zooplankton, mainly at night, chiefly copepods in juvenile stages, but larger prey as adults (chaetognaths, polychaetes, shrimps and small fishes) (Ref. 188). Breeds during its first year and probably survives only a few months after maturity (Ref. 188). Marketed fresh and dried salted (Ref. 188). Usually parceled in leaves and baked in a motu oven. Do not recover quite as quickly as other species of baitfish after heavy fishing (Ref. 26367).
Oviparous (Ref. 205). Breeds during its first year and probably survives only a few months after maturity (Ref. 188).
Whitehead, P.J.P., 1985. FAO Species Catalogue. Vol. 7. Clupeoid fishes of the world (suborder Clupeoidei). An annotated and illustrated catalogue of the herrings, sardines, pilchards, sprats, shads, anchovies and wolf-herrings. FAO Fish. Synop. 125(7/1):1-303. Rome: FAO. (Ref. 188)
IUCN Red List Status (Ref. 130435)
CITES (Ref. 128078)
Not Evaluated
Threat to humans
Potential pest (Ref. 6362)
Human uses
Pesca: scarso interesse commerciale; esca: usually
Strumenti
Special reports
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Estimates based on models
Preferred temperature (Ref.
115969): 24.9 - 29.3, mean 28.5 (based on 3173 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00598 - 0.01598), b=3.08 (2.94 - 3.22), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trophic level (Ref.
69278): 3.6 ±0.4 se; based on diet studies.
Resilienza (Ref.
120179): Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (K=2.6).
Fishing Vulnerability (Ref.
59153): Low vulnerability (17 of 100).
Climate Vulnerability (Ref.
125649): High vulnerability (58 of 100).
