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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..
Environment: milieu / climate zone / depth range / distribution range
البيئة
; المياه العذبة القاع. Subtropical
Asia: Japan, Ryukyu Is.
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 6.6 cm SL ذكر/ مختلط الجنس; (Ref. 123096); 5.0 cm SL (female)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
الأشواك الظهرية (المجموع) : 7; الأشعة الظهرية الناعمة (المجموع) : 7 - 9; شوكة شرجية: 1; أشعه شرجية لينه: 7 - 8; فقرات: 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).
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).
Life cycle and mating behavior
Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae
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)
IUCN Red List Status (Ref. 130435)
استخدامات بشرية
أدوات
تقارير خاصة
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مصادر علي الأنترنت
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=0.00724 (0.00338 - 0.01553), b=3.05 (2.87 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
المرونه (Ref.
120179): عالي, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أقل من 15 شهر (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
