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Gobiiformes (Gobies) >
Gobiidae (Gobies) > Gobionellinae
Etymology: Rhinogobius: Greek, rhinos = nose + Latin, gobius = gudgeon (Ref. 45335); yaima: Named for the type locality, Yaeyama Islands.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
; acqua dolce demersale. Subtropical
Asia: Japan, Ryukyu Is.
Dimensione / Peso / Età
Maturità: Lm ?  range ? - ? cm
Max length : 6.6 cm SL maschio/sesso non determinato; (Ref. 123096); 5.0 cm SL (female)
Breve descrizione
Chiavi di identificazione | Morfologia | Morfometria
Spine dorsali (totale) : 7; Raggi dorsali molli (totale) : 7 - 9; Spine anali: 1; Raggi anali molli: 7 - 8; Vertebre: 26. This species is distinguished from its congeners by the following characters: head depressed, its maximum depth 65.5-71.6% of its maximum width; the body and caudal peduncle elongate, their depths 13.8-14.5% SL, at anal fin origin and 11.4-12.2% SL, respectively; longitudinal scales 40-43; vertebrae 10 + 16 = 26; D1 VI, low in males, not extending posteriorly to origin of D2 when adpressed; fifth pelvic-fin segmented ray usually divided into 5 branches at its first (most proximal) segmenting point; naked pectoral-fin base and prepelvic area; belly with small cycloid scales except forthe narrow area around ventral midline; cheek with sensory-papillae rows arranged longitudinally, no transverse rows. Colouration: pectoral fin base with a distinct dull orange oval spot; temporal region with 2 orange stripes, reaching posteriorly to, or around, a vertical through origin of second dorsal fin; caudal fin of males with 4 vertical rows of bright orange dots, in females, a pair of vertically-arranged, rounded or rectangular black blotches at the base when alive or freshly collected (Ref. 123096).
Cross section: oval.
Occurs in the upper reaches of swift freshwater streams in montane areas of Ryukyu Is., Japan. It appears to be amphidromous, judging from small-sized eggs laid by the females at the spawning grounds in Urauchi-gawa River, Iriomote-jima I. (Ref. 123096).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Suzuki, T., N. Oseko, S. Kimura and K. Shibukawa, 2020. Two new species of torrential gobies of the Genus Rhinogobius from the Ryukyu Islands, Japan. Bull. Kanagawa Prefect. Mus. (Nat. Sci.) 49:7-28. (Ref. 123096)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Pesca: di nessun interesse
Strumenti
Rapporti speciali
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Fonti Internet
Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00813 (0.00359 - 0.01840), b=3.08 (2.91 - 3.25), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
Livello trofico (Fonte Biblio. 69278) |
3.3 ±0.4 se; based on size and trophs of closest relatives |
Resilienza (Fonte Biblio. 120179) |
Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (Preliminary K or Fecundity.). |
Vulnerabilità della pesca (Ref. 59153) |
Low vulnerability (15 of 100). 🛈 |