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Diagnostic Description

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This species has no unique autapomorphies, the third (main) lateral bar uniformly wide (its width not uniform in other species); caudal blotch usually absent; no lateral spot or medial intensification of bars on side of body; absence of ocellus on dorsal fin; without abdominal blackening in mature females; palatine arms subequal; posteriad projection on ventroposterior angle of retroarticularabsent; articular with a right angle ventrally; an anteriorly directed pronounced convexityon ventral process of articular present; anal-fin spines modally 7 (Ref. 74403).
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Recorder
Estelita Emily Capuli
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Life Cycle

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300 eggs, female tends the clutch.
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Recorder
Monika Heskamp
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Morphology

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Dorsal spines (total): 17 - 18; Dorsal soft rays (total): 9 - 10; Anal spines: 6 - 8; Analsoft rays: 7 - 8
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Estelita Emily Capuli
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Trophic Strategy

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Inhabits rivers and rivulets which have moderate to strong currents but is not found in the rapids. Prefers smaller rocks and gravel. Found up to 2000 feet of elevation. Omnivorous, feeding on algal filaments, aquatic insects, seeds and bottom detritus. Produces about 200 offspring which feed on the parent's dermal mucus.
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Recorder
Drina Sta. Iglesia
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Biology

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Inhabits rivers and rivulets which have moderate to strong currents but is not found in the rapids. Prefers smaller rocks and gravel. Found up to 2000 feet of elevation. Omnivorous, feeding on algal filaments, aquatic insects, seeds and bottom detritus. Spawns in caves or crevices, preferring to adhere its eggs to an oblique or vertical surface. Produces about 200 offspring which feed on the parent's dermal mucus.
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Rainer Froese
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Importance

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aquarium: commercial
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Rainer Froese
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Amatitlania sajica

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Amatitlania sajica, the T-bar cichlid or Sajica cichlid, is a Central American species of cichlid found in freshwater streams and lakes on the Pacific slope of Costa Rica.[3] The fish is tan colored with seven indistinct bars on the body. The third bar is usually prominent and coupled with a dark lateral stripe running from the gill cover results in a horizontal T-shaped mark, hence the common name of T-bar cichlid.

Environment

The T-bar cichlid inhabits rivers which have moderate to strong currents in Costa Rica at up to 2000 feet of elevation, but they are not found in the rapids. They prefer smaller rocks and gravel. They are omnivorous, feeding on algal filaments, aquatic insects, seeds and bottom detritus.[2]

Breeding

Male A. sajica reach to 12 cm. Mature females that are ready to spawn have a beautiful golden yellow color on their dorsal and anal fins.

These fish exhibits a number of different cichlid spawning behaviors including cave spawning (most common) and open substrate spawning.[4] Which method that is used seem to depend on the mood of the parents not on the availability of suitable spawning caves. They pair off with a dance in which the male swimming parallel to the female. The males can be really aggressive with a female that is not ready to spawn, to the point where he may kill her. The female will find a secluded shelter to lay many eggs such as a large crevice between rocks or a nest dug in the gravel. The male will then fertilize the eggs and then ferociously protect them from any other fish which come near.

Upon hatching after 3 days from the female laying the eggs, the fry will attempt to swim with the egg enclosed around its body. Eventually, the fry will resemble tiny versions of their parents. The female and male occasionally move the fry in their mouth to the nest if they stray too far from it, however the male might eat a few of them. They are very good parents and are often able to raise young to adult size in crowded community aquariums.

See also

References

  1. ^ Angulo, A. & Lyons, T.J. 2020. (21 September 2019). "Amatitlania sajica. The IUCN Red List of Threatened Species 2020: e.T165014555A165015013". IUCN Red List.{{cite web}}: CS1 maint: multiple names: authors list (link)
  2. ^ a b Froese, Rainer; Pauly, Daniel (eds.) (2019). "Amatitlania sajica" in FishBase. December 2019 version.
  3. ^ Schmitter-Soto, Juan J. (2007). "A systematic revision of the genus Archocentrus (Perciformes: Cichlidae), with the description of two new genera and six new species" (PDF). Zootaxa. 1603: 1–78. doi:10.11646/zootaxa.1603.1.1. Retrieved 2018-01-25.
  4. ^ "Sajica Cichlid".

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Amatitlania sajica: Brief Summary

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Amatitlania sajica, the T-bar cichlid or Sajica cichlid, is a Central American species of cichlid found in freshwater streams and lakes on the Pacific slope of Costa Rica. The fish is tan colored with seven indistinct bars on the body. The third bar is usually prominent and coupled with a dark lateral stripe running from the gill cover results in a horizontal T-shaped mark, hence the common name of T-bar cichlid.

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