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Actinopterygii (ray-finned fishes) > Clupeiformes (Herrings) > Clupeidae (Herrings, shads, sardines, menhadens)
Etymology: Opisthonema: Greek, opisthe = behind + Greek,nema = filament (Ref. 45335).

Environment / Climate / Range Ecology

Marine; pelagic-neritic; depth range 0 - 50 m (Ref. 188). Tropical; 3°N - 4°S, 94°W - 89°W (Ref. 188)

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 26.0 cm SL male/unsexed; (Ref. 188); common length : 18.0 cm SL male/unsexed; (Ref. 188)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 13-21; Anal spines: 0; Anal soft rays: 15 - 17. The filamentous last dorsal fin ray distinguishes this species from members of any other eastern Pacific clupeoid genus. Lower gill rakers 50 to 87 in fishes over 14 cm standard length (intermediate between O. medirastre with 41 to 69 and O. libertate with 63 to 110, but neither of these occur in the Galapagos Islands).

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions | Faunafri

Southeast Pacific: endemic to the Galapagos Islands.

Forms schools.

Main reference Upload your references | References | Coordinator | Collaborators

Whitehead, P.J.P., 1985. FAO Species Catalogue. Vol. 7. Clupeoid fishes of the world (suborder Clupeioidei). 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.

IUCN Red List Status (Ref. 90363)

Vulnerable (VU) (D2)

Threat to humans

Harmless

Human uses

Fisheries: subsistence fisheries

FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Estimates of some properties based on empirical models

Phylogenetic diversity index (Ref. 82805): PD₅₀ = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00831 (-0.15099 - 0.16761), b=3.07362 (2.98654 - 3.16071), based on LWR estimates for this family-BS (Ref. 93245).

Trophic Level (Ref. 69278): 3.3 ±0.4 se; Based on size and trophs of closest relatives

Resilience (Ref. 69278): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

Vulnerability (Ref. 59153): Low to moderate vulnerability (31 of 100) .

Price category (Ref. 80766): Low.

Opisthonema berlangai Berry & Barrett, 1963