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> Gonorynchiformes (Milkfishes) > Kneriidae (Shellears)
Etymology: Grasseichthys: Greek, grassos, -ou = stink, dirt + Greek, ichthys = fish (Ref. 45335).
More on author: Géry.

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

; स्वच्छ जल, अलवण जल बेनथोपिलाजिक. Tropical

वितरण देश | ऐफ ऐ ओ क्षेत्र | Ecosystems | संयोग | Point map | भूमिका | Faunafri

Africa: scattered localities in the Ivindo and the larger Ogowe basin of Gabon; reports from the central Congo basin refer to another species (Ref. 81636).

आकार / वज़न / Age

Maturity: L_m ? range ? - ? cm
Max length : 2.1 cm SL पुल्लिंग / अलिंग; (Ref. 42473)

Short description आकृति विज्ञान | मौरफोमैटरिक्स

पृष्ठीय रीढ़ (सम्पूर्ण): 0; पृष्ठीय सौफट रेज़ (सम्पूर्ण): 7-8; गुदा कांटा 0; ऐनल सौफट रेज़: 9 - 10; जानवरों की रीड़ का जोड़: 35 - 36. Diagnosis: very small and larval in appearance; body elongate, laterally compressed, shallow (body depth 17.9-20.0% SL in females and 15.2-17.9% SL in males); scaleless; head small (head length 18.0-22.7% SL), with small, terminal mouth and large eyes; teeth absent; interorbital distance narrow (11.9-12.9% HL); gill opening short and located above pectoral fin; pectoral fins positioned ventrally and often splayed out from the body in preserved specimens; caudal peduncle long, with keels of transparent tissue, apparently anterior extensions of caudal fin membrane, reaching forward on both dorsal and ventral edge (ventral extension is more developed); caudal fin forked, with 16 rays, including an unbranched ray on dorsal and ventral edge; fin spines lacking; 2 branchiostegal rays; body semi-translucent, with myomeres clearly visible; lateral line absent; epibranchial organ reduced or absent (Ref. 81636).

Open water species, not burrying in sand; forms schools; spawns during the raining season, during which it may be very abundant, forming aggregations in open water areas in the swamps; females of 20-24mm carry about 40 round, ripe eggs of about 0.4mm diameter; males mature at a size of about 18mm total length (Ref. 91379).

Life cycle and mating behavior परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा

Main reference Upload your references | संदर्भ | संयोजक | सहयोगीयो

Géry, J., 1965. Poissons du bassin de l'Ivindo. I - Les biotopes. Biol. Gabon. 1(4):375-384. (Ref. 91379)

IUCN Red List Status (Ref. 130435)

वेदनीय, आई यु सी ऐन लाल सूची देखें। (VU) (B1ab(iii)+2ab(iii)); Date assessed: 16 February 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

अधिक जानकारी

देश
ऐफ ऐ ओ क्षेत्र
Ecosystems
संयोग
भूमिका
Stocks
पारिस्थितिकी
आहार
खाद्य पदार्थ
आहार खपत
खोराक

आम नाम
उपशब्द
चपायचय
परभक्षी
ईकोटोकसीकोलौजी
पुनरुत्पत्ति
परिपक्व अवधि
मछलीऔ का अंडे देना
Spawning aggregation
Fecundity
अंडे
Egg development

Age/Size
बाढ़
Length-weight
Length-length
Length-frequencies
मौरफोमैटरिक्स
आकृति विज्ञान
लार्वा
लारवल गतिकी
भर्ती
बहुतायत
BRUVS

संदर्भ
जलीयकृषि
जलीयकृषि रूपरेखा
खींच
आनुवंशिकी
Electrophoreses
हैरेटिबिलटी
बीमारी
प्रक्रमण
Nutrients
Mass conversion

सहयोगीयो
तस्वीरे
Stamps, Coins Misc.
ध्वनि
सिगुयटिरा
रफ्तार
तैरने के प्रकार
गिल क्षेत्र
Otoliths
दिमाग
दृष्टि

साधन

Special reports

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इंटरनेट स्रोत

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

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

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Grasseichthys gabonensis Géry, 1964