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Knipowitschia longecaudata, Longtail dwarf goby
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Knipowitschia longecaudata
Picture by
Naseka, A.M.
Teleostei (teleosts) >
Gobiiformes
(Gobies) >
Gobiidae
(Gobies) > Gobionellinae
Etymology:
Knipowitschia:
Because of N.M.Knipowitsch, a zoologist and Russian ichthyologist from the Academy of Sciences. Expeditions in "Pomor" and "Pervosvanniy" ships to Azov and Black sea (1898-1908)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; freshwater; brackish; demersal. Temperate; 4°C - 20°C (Ref.
2059
); 48°N - 42°N, 30°E - 54°E
Eurasia: Brackish portions of the Black Sea, Sea of Azov and Caspian Sea.
Length at first maturity / Size / Weight / Age
Maturity: L
m
2.0
  range ? - ? cm
Max length : 5.0 cm TL male/unsexed; (Ref.
2058
); 3.5 cm TL (female)
Dorsal
spines
(total): 6 - 8;
Dorsal
soft rays
(total): 7-9;
Anal
spines
: 1;
Anal
soft rays
: 8 - 9. This species is distinguished from its congeners by the following characters: upper part of caudal fin longer than the lower part; anterior extremity of anterior oculoscapular canal in front of middle of eye; no posterior oculoscapular canal; back unscaled in front of origin of second dorsal; breeding males with 4-8 dark bars when alive; total scales in midlateral series 33-40 (Ref.
59043
).
Occur in shallow water, on sand and among weeds (Ref.
4696
). Live less than 2 years. Feed on small benthic invertebrates (Ref.
59043
). Spawn after first winter. Females may spawn several times during a season. Males defend eggs in cavities under stones, plant material or molluscs shells (Ref.
59043
) like underside of lamellibranch valves (
Cardium, Monodonta, Unio
, etc.) (Ref.
4696
). Eggs hatch at 3.0-3.8 mm (Ref.
59043
).
Males defend eggs in cavities under stones, plant material or molluscs shells (Ref.
59043
). Females spawn several times during a season (Ref.
59043
).
Miller, P.J.
, 1986. Gobiidae. p. 1019-1085. In P.J.P. Whitehead, M.-L. Bauchot, J.-C. Hureau, J. Nielsen and E. Tortonese (eds.) Fishes of the North-eastern Atlantic and the Mediterranean. Volume 3. UNESCO, Paris. (Ref.
4696
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
01 January 2008
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Zoological Record
Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00442 - 0.02163), b=3.05 (2.86 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.4 se; based on size and trophs of closest relatives
Generation time: 1.7 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (tmax < 2; tm < 1 (8-10 months);).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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- 20 July 2016
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