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Retropinna tasmanica, Tasmanian smelt : bait
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Tasmanian smelt
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drawing shows typical species in Retropinnidae.
Teleostei (teleosts) >
Osmeriformes
(Freshwater smelts) >
Retropinnidae
(New Zealand smelts) > Retropinninae
Etymology:
Retropinna:
Latin, retro = backwards, on the back side + Latin, pinna = thorn (Ref.
45335
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; freshwater; brackish; demersal; anadromous (Ref.
51243
). Temperate; 41°S - 44°S (Ref.
26213
)
Oceania: Endemic to Tasmania.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 7.0 cm TL male/unsexed; (Ref.
5259
); common length : 5.5 cm TL male/unsexed; (Ref.
5259
)
Inhabits estuaries and the lower reaches of coastal streams (Ref.
44894
). Occurs in lowland streams, forming schools that feeds at or near the surface on insects and zooplankton. Found among the annual Tasmanian whitebait migrations in shoals with
Lovettia seali
and various galaxiids. Most of the life cycle is spent at the sea (Ref.
44894
). The species is thought to have an anadromous life cycle involving upstream migration of adults from the sea prior to spawning. Newly hatched larvae are carried on tides out to sea where they develop to maturity (ref.
44894
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Allen, G.R.
, 1989. Freshwater fishes of Australia. T.F.H. Publications, Inc., Neptune City, New Jersey. (Ref.
5259
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
11 February 2019
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: of no interest; bait: usually
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.6406 [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
).
Trophic level (Ref.
69278
): 3.3 ±0.42 se; based on food items.
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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