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Myxine affinis, Patagonian hagfish
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Patagonian hagfish
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Myxine affinis
Picture by
Delpiani, M.S.
Myxini (hagfishes) >
Myxiniformes
(Hagfishes) >
Myxinidae
(Hagfishes) > Myxininae
Etymology:
Myxine:
Ancient Greek word for a slimy fish:
myxa
, slime;
-inus
, one who, referring to copious amounts of slime produced by
M. glutinosa
. (
See ETYFish
)
;
affinis:
Latin for related, presumably referring to its similarity to
M. glutinosa
. (
See ETYFish
)
.
More on author:
Günther
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; non-migratory; depth range 30 - 150 m (Ref.
4537
). Temperate
Southwest Atlantic: Straits of Magellan, southern Chile and southern Argentina (Ref.
4537
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 65.9 cm TL male/unsexed; (Ref.
31276
)
Life cycle and mating behavior
Maturity
|
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|
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|
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Larvae
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
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
11 December 2009
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: of no interest
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Estimates based on models
Preferred temperature (Ref.
123201
): 5.9 - 13.5, mean 8.8 °C (based on 166 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00115 (0.00045 - 0.00296), b=3.03 (2.80 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153
): Moderate to high vulnerability (46 of 100).
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- 20 July 2016
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