Environment: milieu / climate zone / गहराई सीमा / distribution range
पारिस्थितिकी
समुद्री pelagic-neritic; गहराई सीमा ? - 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).
आकार / वज़न / Age
परिपक्व अवधि: Lm ? range ? - ? cm
Max length : 30.0 cm TL पुल्लिंग / अलिंग; (Ref. 55763); common length : 22.0 cm SL पुल्लिंग / अलिंग; (Ref. 9291); अधिकतम प्रकाशित वज़न: 261.36 g (Ref. 124487)
पृष्ठीय रीढ़ (सम्पूर्ण) : 0; पृष्ठीय सौफट रेज़ (सम्पूर्ण) : 13 - 21; गुदा कांटा: 0; ऐनल सौफट रेज़: 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)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
मात्स्यिकी: उच्च वाणिज्य; ठहराव / प्रलोभन: occasionally
साधन
Special reports
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इंटरनेट स्रोत
Estimates based on models
Preferred temperature (संदर्भ
123201): 21.4 - 29, mean 27 °C (based on 86 cells).
Phylogenetic diversity index (संदर्भ
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).
Trophic level (संदर्भ
69278): 2.9 ±0.28 se; based on food items.
लौटाव (संदर्भ
120179): ऊंचा, न्यूनतम जनसंख्या दुगनी समय अवलागत 15 महीने। (K=0.22-0.5).
Prior r = 0.43, 95% CL = 0.28 - 0.64, Based on 2 full stock assessments.
Fishing Vulnerability (Ref.
59153): Low vulnerability (25 of 100).
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Climate Vulnerability (Ref.
125649): Moderate vulnerability (37 of 100).
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Nutrients (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);
