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Julidochromis marlieri : aquarium
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Julidochromis marlieri
Picture by
Slaboch, R.
Teleostei (teleosts) >
Cichliformes
(Cichlids, convict blennies) >
Cichlidae
(Cichlids) > Pseudocrenilabrinae
Etymology:
Julidochromis:
Taken from marine wrasse "julidini"; also from Greek, ioulis = a fish dealing with genera Coris or Thalassoma (Ref.
45335
)
.
More on author:
Poll
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal; pH range: 7.5 - 9.0; dH range: ? - 12, usually 3 - 9 m (Ref.
54894
). Tropical; 22°C - 25°C (Ref.
1672
); 3°S - 6°S, 30°E -
Africa: Endemic to the northwestern part of Lake Tanganyika.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 13.0 cm TL male/unsexed; (Ref.
5651
)
These fish are hardy, peaceful toward other species and highly intelligent. They are microfeeders and not carnivorous. In the wild, they often stay in deep water and never come to the surface to feed. They never swim in midwater but are typical rock-dwellers. Ventures into the open but never far from the rock cover. Breeds in crevices and caves (Ref.
6770
). Monogamous pairs are most common (Ref.
54944
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
The same study (Ref.
54894
) claims that polyandry aside from monogamy is also demonstrated by this species because of some observations in the nesting area where a female occupies 2 territories each with a male. This idea of an expanded mating system for
J. marlieri
was initially suggested by Yamagishi and Kohda (1996). However, monogamous pairs are most common (Ref.
54944
). Males guard the nest against attacks by cichlid and non-cichlid predators alike (Ref.
54944
).
Maréchal, C. and M. Poll
, 1991. Julidochromis. p. 202-205. In J. Daget, J.-P. Gosse, G.G. Teugels and D.F.E. Thys van Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels; MRAC, Tervuren; and ORSTOM, Paris. Vol. 4. (Ref.
5651
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
31 January 2006
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Aquarium: commercial
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5156 [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
): 2.5 ±0.00 se; based on food items.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Fec = 70).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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