Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
marin pelagic-neritic; profondeur ? - 70 m (Ref. 96339), usually ? - 50 m (Ref. 11035). Tropical; 28°N - 3°S, 112°W - 78°W (Ref. 54686)
Eastern Pacific: Santa Rosalita, Pacific coast of Baja, California, Mexico southward to Punta Sal and Punta Picos, Peru. (Earlier works probably combined data for Opisthonema bulleri and Opisthonema medirastre). Range is extended northwards to San Pedro, California (Ref. 35601). Rare on outer coast of Baja California Sur (Ref. 35601).
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 30.0 cm TL mâle / non sexé; (Ref. 55763); common length : 22.0 cm SL mâle / non sexé; (Ref. 9291); poids max. publié: 261.36 g (Ref. 124487)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Épines dorsales (Total) : 0; Rayons mous dorsaux (Total) : 13 - 21; Épines anales: 0; Rayons mous anaux: 12 - 23. The filamentous last dorsal fin ray distinguishes it from members of any other eastern Pacific clupeoid genus. Separated from eastern Pacific Opisthonema species by having 63 to 110 lower gill rakers in fishes over 14 cm standard length.
Body shape (shape guide): elongated; Cross section: compressed.
Usually occur near the surface of coastal and offshore waters, down to over bottom of continental shelf (Ref. 11035). Form dense schools. Apparently the most abundant of the eastern Pacific species of Opisthonema. Feed on phytoplankton (dinoflagellates and diatoms). Oviparous, with planktonic eggs and larvae (Ref. 35601). It is reduced to fish meal (Ref. 9291). Oil may be extracted (Ref. 9291). May be canned (Ref. 9291).
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)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2)
Menace pour l'homme
Harmless
Utilisations par l'homme
Pêcheries: hautement commercial; appât: occasionally
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Sources Internet
Estimations basées sur des modèles
Température préférée (Réf.
123201): 21.4 - 29, mean 27 °C (based on 86 cells).
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00395 - 0.01157), b=3.06 (2.91 - 3.21), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Niveau trophique (Réf.
69278): 2.9 ±0.28 se; based on food items.
Résilience (Réf.
120179): Haut, temps minimum de doublement de population inférieur à 15 mois (K=0.22-0.5).
Prior r = 0.43, 95% CL = 0.28 - 0.64, Based on 2 full stock assessments.
Vulnérabilité de la pêche (Ref.
59153): Low vulnerability (25 of 100).
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Vulnérabilité climatique (Ref.
125649): Moderate vulnerability (37 of 100).
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Nutriments (Ref.
124155): Calcium = 199 [90, 362] mg/100g; Iron = 1.94 [1.10, 3.34] mg/100g; Protein = 18.6 [17.5, 19.7] %; Omega3 = 0.37 [0.21, 0.67] g/100g; Selenium = 48.5 [23.7, 99.5] μg/100g; VitaminA = 26.8 [9.3, 78.7] μg/100g; Zinc = 1.41 [0.97, 2.09] mg/100g (wet weight);