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Nezumia stelgidolepis, California grenadier : fisheries
> Gadiformes (Cods) > Macrouridae (Grenadiers or rattails)
Etymology: Nezumia:A Japanese word that means "mouse"; stelgidolepis:stelgidolepis meaning scraper scale, referring to the rasplike scales that cover the body (Ref. 4525). More on author: Gilbert.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie
Dorsale stekels (totaal) : 2; Anale stekels: 0. Snout short, narrow, bluntly pointed; terminal snout scute developed but not conspicuously; suborbital ridge low; underside of snout, most of the suborbital region, and anterior half of mandible without scales; cephalic pores of the lateralis system prominent. Pyloric caeca 24 to 58. Body scales densely covered with conical to narrowly lanceolate spinules in short, slightly convergent rows. Overall color is swarthy, blackish ventrally, with bluish tinge on abdominal region; oral and branchial cavities generally pale with some blackish areas; fins dusky to blackish, first dorsal fin slightly paler basally. Body shape (shape guide): elongated; Cross section: oval.
Food items are generally forcibly regurgitated by the fish's expunging gas bladder as it is hauled from the depths, but fish remains have been caught inside the mouth of a few individuals. Considered opportunistic feeders and will eat whatever animal food they encounter in the natural habitat as long as it is of appropriate size (Ref. 4525).
Cohen, D.M., T. Inada, T. Iwamoto and N. Scialabba, 1990. FAO species catalogue. Vol. 10. Gadiform fishes of the world (Order Gadiformes). An annotated and illustrated catalogue of cods, hakes, grenadiers and other gadiform fishes known to date. FAO Fish. Synop. 125(10). Rome: FAO. 442 p. (Ref. 1371)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
Gewenste temperatuur (Ref. 123201): 5 - 9.8, mean 8.4 °C (based on 47 cells).
Fylogenetische diversiteitsindex (Ref. 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00214 (0.00123 - 0.00371), b=3.18 (3.02 - 3.34), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trofisch niveau (Ref. 69278): 4.4 ±0.80 se; based on food items.
Generation time: 5.5 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
Weerstandsvermogen (Ref. 120179): Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (K=0.20).
Kwetsbaarheid van de visserij (Ref. 59153): Moderate to high vulnerability (51 of 100). 🛈
