Common names from other countries
Ikan bertulang rawan (sharks and rays) >
Rajiformes (Skates and rays) >
Arhynchobatidae (Softnose skates)
Etymology: Notoraja: Greek, noton = back + Latin, raja = fish, Raja sp. (Ref. 45335); hesperindica: Name from combination of Greek 'hesper' for westerly, and Latin 'indicus' for Indian, referring to the distribution of the new species..
Environment: milieu / climate zone / depth range / distribution range
Ekologi
laut batidemersal; kisaran kedalaman 1230 - 1600 m (Ref. 123885). Deep-water
Western Indian Ocean: off southern Mozambique and off northwestern Madagascar.
Size / Weight / umur
Maturity: Lm ? range ? - ? cm
Max length : 53.3 cm TL jantan/; (Ref. 123885)
deskripsi pendek
Kunci identifiaksi (pengenalan) | Morfologi | Morfometrik
This species is distinguished from most of its congeners by the intense dark blue-grayish coloration and large dorsolateral tail thorns. It is further distinct with the following characters: disc evenly inverse heart-shaped, with broadly rounded outer corners; body length to mid-cloaca is shorter than tail length from mid-cloaca; snout very long direct preorbital length 15.1-16.7% TL.; orbits are relatively small, horizontal diameter 0.9-1.2 times interorbital width; dorsal surface nearly completely devoid of denticles except the trunk area close to pectoral axils where bands of few denticles start and continue as more pronounced rows on tail; anterior tail with several short rows of spinules and a rather regular row of small spinules on lateral tail; one small preorbital thorn on each side; a regular or irregular row of about 16-25 small median tail thorns; lateral tail with 2 irregular rows of about 15-25 dorsolateral thorns that are much larger than the median thorns. Colouration when fresh, the dorsal disc plain intense dark blue, somewhat mottled blackish-brown in the orbital and snout regions, pelvic fins and claspers medium brownish blue, tail dark blackish blue; the ventral surface dark (Ref. 123885).
Life cycle and mating behavior
Maturities | Reproduksi, perkembang biakan | Spawnings | Egg(s) | Fecundities | Larva
Weigmann, S., B. Séret and M.F.W. Stehmann, 2021. Notoraja hesperindica sp. nov., a new colorful deep-sea softnose skate (Elasmobranchii, Rajiformes, Arhynchobatidae) and first generic record from the western Indian Ocean. Mar. Biodiv. 51(2)[35]:online. (Ref. 123885)
Status IUCN Red List (Ref. 130435)
CITES (Ref. 128078)
Not Evaluated
ancaman kepada manusia
Harmless
penggunaan manusia
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00550 (0.00273 - 0.01106), b=3.10 (2.93 - 3.27), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.8 ±0.7 se; based on size and trophs of closest relatives
Daya lenting (Ref.
120179): sedang, Waktu penggandaan populasi minimum 1.4 - 4.4 tahun (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (41 of 100).
