Japan country information

Common names: Aka-isohaze
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Type locality, Japan, Honshu, Chiba Prefecture, southeast coast of Boso Peninsula, Ubara, NSMT-P 72545 (holotype of Eviota masudai, 2.47 cm SL, male) (Ref. 76829). Recorded from the coasts of Honshu, Shikoku and Kyushu, from the Boso Peninsula southward to the Osumu Peninsula, the Island Sea of Selo, the Izu Islands and Ogasawara Islands, also from the Oki Islands (Ref. 76829).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ja.html
National Fisheries Authority: http://www.maff.go.jp/eindex.html
Occurrences: Occurrences Point map
Main Ref: Matsuura, K. and H. Senou, 2006
National Database:

Common names from other countries

Aka-isohaze, ... more

Classification / Names Κοινά ονόματα | Συνώνυμα | Catalog of Fishes(Γένος, Είδη) | ITIS | CoL | WoRMS | Cloffa

> Gobiiformes (Gobies) > Gobiidae (Gobies) > Gobiinae
Etymology: Eviota: No etymology given, suggested by Christopher Scharpt: from Latin 'eu' for 'true' and 'iota' for anything very small, in combination 'truly very small' referring to it as being the smallest vertebrate at the time it has benn described by Jenkins (thus, making the suggestion by Scharpt plausible.; masudai: Named after Hajime Masuda (Ref. 76829).

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

Θαλασσινό(ά) Υφαλόφιλο(α); εύρος βάθους 2 - 64 m (Ref. 76829). Temperate

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Northwest Pacific: Japan, also Ogasawara and Ryukyu Islands.

Μέγεθος / Βάρος / Age

Maturity: L_m ? range ? - ? cm
Max length : 3.2 cm SL αρσενικό/απροσδιόριστο; (Ref. 76829); 2.7 cm SL (female)

Short description Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία

Ραχιαίες άκανθες (συνολικά) : 6 - 7; Μαλακές ραχιαίες ακτίνες (συνολικά) : 9 - 10; Εδρικές άκανθες: 1; Μαλακές εδρικές ακτίνες: 9. This species is distinguished by the following characters: D VI-I, 10 (9 in only one paratype); typical males (11 of 14 males) have elongate and filamentous dorsal spines reaching to anterior 4th to 8th soft rays of second dorsal fin; A I, 13; pectoral rays 17-18; including 13-17 branched rays; pelvic rays I, 4, I (fifth ray absent in 2 paratypes), fifth pelvic ray greatly reduced, averaging 14.1% (7.0%-28.0%) of fourth ray length, well developed pelvic-fin membranes extending beyond base of first branch of each pelvic-fin ray; lateral scale rows 23-25; transverse scale rows 6-8; cephalic sensory pore system complete sensu Lachner & Karnella (1980); genital papillae of males non-fimbriate; body light pink; edge of scale pockets reddish brown or brown; forming network on body; a small round bluish black or dark brown blotch on each side of nape just above opercle; 2 short longitudinal reddish brown or brown lines on cheek; the upper running posteriorly from postero-ventral corner of eye to a point midway between eye and posterior end of opercle, the lower line running from corner of mouth to a vertical line through posterior edge of eye; a short longitudinal reddish or dark brown line on anteroventral part of preopercle, just below the lower line on cheek; 2 short longitudinal reddish brown or brown bars or oval blotches on pectoral-fin base; one each on the dorsal and ventral part (Ref. 76829).

Occurs in shallow rocky reefs (Ref. 76829).

Life cycle and mating behavior Maturities | Αναπαραγωγή | Spawnings | Egg(s) | Fecundities | Προνύμφες

Main reference Upload your references | Αναφορές | Συντονιστής | Συνεργάτες

Matsuura, K. and H. Senou, 2006. Eviota masudai, a new gobiid fish (Teleostei: Perciformes) from Japan. Mem. Natl. Sci. Mus. (41):341-349. (Ref. 76829)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 29 June 2018

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Human uses

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Διαδικτυακές πηγές

Estimates based on models

Preferred temperature (Ref. 115969): 17.4 - 25.2, mean 21.3 (based on 52 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01023 (0.00477 - 0.02194), b=3.02 (2.84 - 3.20), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Τροφικό Επίπεδο (Ref. 69278): 3.1 ±0.3 se; based on size and trophs of closest relatives

Ελαστικότητα (Ref. 120179): Υψηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού < 15 μήνες (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Eviota masudai Matsuura & Senou, 2006