Myxini (slijmprikken) (hagfishes) >
Myxiniformes (Hagfishes) >
Myxinidae (Hagfishes) > Myxininae
Etymology: Nemamyxine: Greek, nema, -atos = filament + Greek, myxinos, word used by Linne, slime fish (1846) (Ref. 45335).
Omgeving / Klimaat / Range
Ecologie
; marien bathydemersaal; standvastig; diepteverspreiding 80 - 800 m (Ref. 31276). Deep-water, preferred ?
Southwest Atlantic: off Argentina and southern Brazil.
Size / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 40.0 cm TL mannelijk/geslacht niet bekend; (Ref. 31276)
Korte beschrijving
Morfologie | Morfometrie
Diagnosis: Body color light to dark brown, ventral finfold with unpigmented margin. Body extremely slender, depth about 2.4-2.9% of TL. Origin of the ventral finfold well anterior to pharyngocutaneous duct (PCD). Gill pouches 8 pairs. Rostrum rounded. A 3-cusp multicusp on anterior set, a 2-cusp multicusp on posterior set of cusps; total cusps count 32-38. Total pores 124-148 (Ref. 39281).
Specimens were caught in winter months, between May and August, a period of lower water temperature due to the Falklands Current influence (Ref. 39281).
Life cycle and mating behavior
Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven
Copulatory organ absent. The gonads of hagfishes are situated in the peritoneal cavity. The ovary is found in the anterior portion of the gonad, and the testis is found in the posterior part. The animal becomes female if the cranial part of the gonad develops or male if the caudal part undergoes differentiation. If none develops, then the animal becomes sterile. If both anterior and posterior parts develop, then the animal becomes a functional hermaphrodite. However, hermaphroditism being characterised as functional needs to be validated by more reproduction studies (Ref. 51361 ).
Fernholm, B., 1998. Hagfish systematics. p. 33-44. In J.M. Jørgensen, J.P. Lomholt, R.E. Weber and H. Malte (eds.) The biology of hagfishes. Chapman & Hall, London. 578 p. (Ref. 31276)
Status op de Rode Lijst van het IUCN (Ref. 115185)
CITES (Ref. 94142)
Not Evaluated
Gevaarlijk voor mensen
Harmless
Gebruik door de mens
Meer informatie
Leeftijd/GrootteGroeiLengte-gewicht parametersLengte-lengte parametersLengtefrequentiesMorfometrieMorfologieLarvenPopulatiedynamica van de larvenrecruteringAbundantie
ReferentiesAquacultuurAquacultuurprofielKweeklijnenGeneticaAlleelfrequentiesErfelijkheidZiektenVerwerkingMass conversion
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Estimates of some properties based on models
Phylogenetic diversity index (Ref.
82805): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00115 (0.00045 - 0.00294), b=3.03 (2.81 - 3.25), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic Level (Ref.
69278): 3.3 ±0.6 se; Based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
69278): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Fec assumed to be <100).
Kwetsbaarheid (Ref.
59153): Low to moderate vulnerability (32 of 100) .