| 词条 | Pseudotropheus johannii |
| 释义 |
| image = Melanochromis johanni Male.jpg | status = LC | status_system = IUCN3.1 | status_ref = [1] | taxon = Pseudotropheus johannii | authority = Eccles, 1973 | synonyms =Melanochromis johannii (Eccles, 1973) }}Pseudotropheus johannii or the bluegray mbuna is an African freshwater fish from the family Cichlidae.[2][3] Distribution and habitatThe species is endemic to littoral zones on the east, Mozambique coastline of Lake Malawi, south of Chuanga.[3][4] The species is popular in the fishkeeping hobby and is frequently kept in cichlid aquariums.[5][6] In the aquarium trade, the fish is known as the bluegray mbuna or the electric blue johanni.[3][6] DescriptionThe species is highly sexually dimorphic. Females and juveniles are yellow. The coloration of males is a combination of blue to purple and black, with one blue line running across the forehead, over the top of the eye and along the body above the mid-line, a second line appears below the mid-line.[7] NameThe specific name of this fish is derived from the German name Johan, John in English, and honours John Johns who was a collector of fish from Lake Malawi for the aquarium trade.[8] In the aquariumThis fish is an mbuna cichlid that lives in alkaline water with the PH of 7 to 9. It is a tropical fish and lives in temperatures from {{convert|22 to 28|°C|°F}}. The hardness of the water range from 10-20. They are very aggressive and is only kept with other similarly aggressive African cichlids, with one male to two or more females. It is not kept more than one male in the same tank, unless it is a large tank with lots of hiding places. See also
References1. ^{{cite iucn | author = Konings, A. | year = 2018 | title = Pseudotropheus johannii | journal = The IUCN Red List of Threatened Species | volume = 2018 | page = e.T61119A47235259 | url = https://dx.doi.org/10.2305/IUCN.UK.2018-2.RLTS.T61119A47235259.en | accessdate = 27 December 2018}} {{Taxonbar|from=Q28599846}}{{DEFAULTSORT:mbuna, bluegray}}2. ^{{cite book | authors = Konings, A.F. | year = 2016 | title = Malaŵi Cichlids in their natural habitat | edition = 5 | publisher = Cichlid Press | pages = 447 | isbn = 978-1-932892-23-9 }} 3. ^1 2 {{Fishbase species|genus = Pseudotropheus|species= johannii|year=2014}} 4. ^Konings A (2001) Malaŵi cichlids in their natural habitat 3rd Edn. Cichlid Press. USA. {{ISBN|0-9668255-3-5}} 5. ^Konings A (1997) Back to nature guide to Lake Malawi cichlids Druckhaus Beltz, Germany. {{ISBN|3-9805605-3-8}} 6. ^1 {{cite book |last=Riehl |first=Rüdiger. Editor. |author2=Baensch, HA |title=Aquarium Atlas |year=1996|edition=5th |publisher=Tetra Press |location=Germany |isbn=978-3-88244-050-8}} 7. ^{{cite book|last=Mills|first=Dick|title=Aquarium Fish|year=1993|publisher=Dorling Kindersley|location=London136|isbn=978-1-56458-294-2}} 8. ^{{cite web | url = http://www.etyfish.org/cichlidae5/ | title = Order CICHLIFORMES: Family CICHLIDAE: Subfamily PSEUDOCRENILABRINAE (p-y) | accessdate = 13 January 2019 | author1 = Christopher Scharpf | author2 = Kenneth J. Lazara | last-author-amp = yes | work = The ETYFish Project Fish Name Etymology Database | publisher = Christopher Scharpf and Kenneth J. Lazara | date = 25 September 2018}} 2 : Pseudotropheus|Fish described in 1973 |
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