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> Acipenseriformes (Sturgeons and paddlefishes) > Polyodontidae (Paddlefishes)
Etymology: Psephurus: Greek, psephas, -aos = dark + Greek, oura = tail (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range Écologie

marin; eau douce; saumâtre démersal; anadrome (Ref. 117880). Subtropical

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Asia: China, endemic to the Yangtze River and its tributaries.

Taille / Poids / Âge

Maturity: L_m ? range ? - ? cm
Max length : 300 cm TL mâle / non sexé; (Ref. 28581); poids max. publié: 300.0 kg (Ref. 28581)

Description synthétique Clés d'identification | Morphologie | Morphométrie

Head very long, snout extraordinarily long, pointed and paddle-like and base broad; mouth very large.

This species is considered anadromous for it spends at least part of its life in the sea and migrates upriver to reproduce. It occurs in broad surfaced main streams of large rivers, usually staying in the middle and lower layers of the water column and occasionally swims into large lakes. Spawning period is in March and April with spawning sites located in the upper reaches of the Changjiang River but was also reported to take place in the lower Jinsha River between Shuifu and Yibin (Ref. 117880). It grows to 3 m in length and 300 kg in weight (Ref. 28581). Reported length of 7 m SL (Ref. 6866) and 500 kg weight (Ref. 4537, 58490) are doubtful (Paxton, pers. comm.). Piscivorous throughout most of its life. Threatened due to over harvesting and habitat loss (Ref. 58490). Expected number of mature individuals in the wild, less than 50, but more extensive surveys are needed across its range to confirm its existence; last seen in 2003 (Ref. 117880).

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Référence principale Upload your references | Références | Coordinateur | Collaborateurs

Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott, 1991. World fishes important to North Americans. Exclusive of species from the continental waters of the United States and Canada. Am. Fish. Soc. Spec. Publ. (21):243 p. (Ref. 4537)

Statut dans la liste rouge de l'IUCN (Ref. 130435)

Eteint (EX) ; Date assessed: 14 September 2019

CITES

Appendix II: International trade monitored

CMS (Ref. 116361)

Appendix II: Migratory species conserved through agreements

Menace pour l'homme

Harmless

Utilisations par l'homme

Pêcheries: commercial

FAO - pêcheries: Résumé espèce; Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 1.2500 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00501 (0.00192 - 0.01311), b=3.10 (2.88 - 3.32), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Niveau trophique (Ref. 69278): 4.2 ±0.73 se; based on food items.

Résilience (Ref. 120179): Faible, temps minimum de doublement de population : 4,5 à 14 années (tm=5-15).

Fishing Vulnerability (Ref. 59153): Very high vulnerability (90 of 100).

Catégorie de prix (Ref. 80766): Unknown.

Psephurus gladius (Martens, 1862)