Holocéphales (chimères) (chimaeras) >
Chimaeriformes (Chimaeras) >
Chimaeridae (Shortnose chimaeras or ratfishes)
Etymology: Hydrolagus: hydro-, combining form of hydor (Gr.), water; lagos (Gr.), hare, i.e., “water rabbit,” probably referring to three pairs of tooth plates, which tend to protrude from the mouth like a rabbit’s incisors. (See ETYFish); matallanasi: In honor of Jesús Matallanas Garcia, University of Barcelona (Spain), for his “extensive work and tireless dedication to ichthyology”. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Écologie
marin bathydémersal; profondeur 416 - 736 m (Ref. 52554). Subtropical; 23°S - 31°S (Ref. 52554)
Southwestern Atlantic: Brazil.
Length at first maturity / Taille / Poids / Âge
Maturity: Lm ?, range 30 - ? cm
Max length : 69.5 cm TL mâle / non sexé; (Ref. 52554); 37.8 cm OT (female)
Description synthétique
Morphologie | Morphométrie
Diagnosis: Differs from its congeners in having an irregular brown coloration with reticulations and spots over the body; ventral surface whitish, including pectoral bases; proximal margin of the second dorsal fin whitish; tooth plates striped and bicolor, yellowish and gray; length of dorsal fin spine equal to or slightly greater than head length; pectoral fin notably long, its tip extending beyond posterior margin of pectoral fin base; upper margin of second dorsal fin notably concave at middle region of second dorsal fin base; minimum height of second dorsal fin less than half of maximum height (located at points anterior and posterior to middle region of fin); eye length slightly smaller than preorbital length (Ref. 52554).
Female maximum length given as precaudal length (PCL). Inhabits deep-reefs on the continental slope, usually deeper than 400 meters; with gorgonians, hard corals, tube sponges, crinoids, and ophiuroids. It also shares this habitat with other sharks Heptranchias perlo, Scyliorhinus haeckelii, Galeus mincaronei, Schroederichthys saurisqualus, Squalus sp., and the skate Gurgesiella dorsalifera (Ref. 52554).
Life cycle and mating behavior
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Soto, J.M.R. and C.M. Vooren, 2004. Hydrolagus matallanasi sp. nov. (Holocephali, Chimaeridae) a new species of rabbitfish from southern Brazil. Zootaxa 687:1-10. (Ref. 52554)
Statut dans la liste rouge de l'IUCN (Ref. 130435)
Menace pour l'homme
Harmless
Utilisations par l'homme
Pêcheries: sans intérêt
Plus d'informations
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Estimates based on models
Preferred temperature (Ref.
123201): 6.4 - 10.2, mean 8.2 °C (based on 7 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00282 (0.00118 - 0.00673), b=3.10 (2.89 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Niveau trophique (Ref.
69278): 3.8 ±0.6 se; based on size and trophs of closest relatives
Résilience (Ref.
120179): Faible, temps minimum de doublement de population : 4,5 à 14 années (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (48 of 100).
