Scientific Results of the Cambridge Expedition to the East African Lakes, 1930-1.-11. The Cichlid Fishes.

Trewavas, Ethelwynn

doi:10.1111/j.1096-3642.1933.tb00062.x

Cited by 41 publications

(37 citation statements)

References 1 publication

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“…Out of the two non-endemic species tested, one (Astatotilapia nubila, formerly Haplochromis nubilus) also bore group V, whereas the other (Astatoreochromis alluaudi) did not. The former species has been reported from lakes and rivers in the entire LV basin, including various waters in the LER (Trewavas 1933;Greenwood 1965). A. alluaudi may have been limited originally to the LV basin, but more recently has also been introduced into other regions of East Africa (Greenwood 1956).…”

Section: Resultsmentioning

confidence: 99%

The origin and age of haplochromine fishes in Lake Victoria, East Africa

Nagl¹,

Tichy²,

Mayer³

et al. 2000

Proc. R. Soc. Lond. B

126

195

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According to a widely held view, the more than 300 species of haplochromine cichlid ¢shes in Lake Victoria (LV), East Africa, originated from a single founder species in less than 12 000 years. This view, however, does not follow from the published geological and molecular evidence. The former does indeed suggest that the LV basin dried out less than 15 000 years ago, but it does not provide any information about the species that re-colonized the new lake or that remained in the rivers draining the area. The molecular evidence is inconclusive with respect to the origin of the LV haplochromines because cichlids from critical regions around LV were not adequately sampled; and as far as the age of the LV haplochromines is concerned, it in fact led to an estimate of 250 000^750 000 years old. In the present study, mitochondrial DNA (control region) variation was determined by heteroduplex and sequencing analyses of more than 670 specimens collected at widely distributed East African riverine and lacustrine localities. The analyses revealed the existence of seven haplogroups (I^VII) distinguishable by characteristic substitutions. All endemic LV samples tested fell into one of these haplogroups (V) which, however, was also found to be present at various other localities, both riverine and lacustrine, outside LV. Within this haplogroup, four subgroups (VA through VD) could be distinguished, two of which (VB and VC) were represented in LV and at other localities. The great majority of the LV haplochromine species could be classi¢ed as belonging to the VC subgroup, which was found only in LV and in the rivers draining into it. Hence, while the endemic haplochromine species of LV could not have originated from a single founding population, the lake does harbour a large species £ock which probably arose in situ.

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Section: Resultsmentioning

confidence: 99%

The origin and age of haplochromine fishes in Lake Victoria, East Africa

Nagl¹,

Tichy²,

Mayer³

et al. 2000

Proc. R. Soc. Lond. B

126

195

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“…Prior to introduction of new fish species, Lakes Victoria, Kyoga, and Nabugabo had diverse fish faunas with many species in common (Graham 1929;Trewavas 1933;Greenwood 1965;Worthington 1929;Cambridge Nabugabo Biological Survey 1962). Two tilapiine cichlids, Oreochromts esculentus (Graham 1929) andO.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Predation by Nile Perch, Lates niloticus L., on the Fish of Lake Nabugabo, with Suggestions for Conservation of Endangered Endemic Cichlids

Ogutu‐Ohwayo¹

1993

Conservation Biology

114

122

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As in Lake Victoria and Lake Kyoga, most of the native fish species of Lake Nabugabo have either been depleted or have disappeared since Lates niloticus, Nile perch, and Oreochromis niloticus, a tilapiine, were introduced. L. niloticus, O. niloticus, Schilbe intermedius, Brycinus jacksonii, and Rastrineobola argentea are the only species still abundant and widespread in the lake. Of the five haplochromine species endemic to Lake Nabugabo, at least one has vanished and the remaining ones are very rare. The prey of the Nile perch in Lake Nabugabo, with the exception of the prawn Caridina nilotica, which is absent from the lake, are similar to those the predator switched to in Lakes Victoria and Kyoga after haplochromines had been depleted. These consist of ephemeropterans—especially Povilla, the anisopteran nymphs R. argentea, tilapiines, and juvenile Nile perch. Three small lakes adjacent to Lake Nabugabo—Lake Kayanja, Lake Kayugi, and Lake Manywa—contain large numbers of Oreochromis esculentus and two haplochromine species previously known only in Lake Nabugabo. These three lakes should be designated conservation areas for the cichlids and other native species that were previously abundant in Lakes Victoria, Kyoga, and Nabugabo. The swamps around these lakes should be protected so that the Nile perch does not spread into them. Further research should be carried out to ensure the preservation of the endemic species.

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“…Lestrade. Tilapia, introduced in 1927 and1930 to Lake Bunyoni (Worthington 1932), were still very rare in the lake in the early thirties (Trewavas 1933), but later became a very important food fish there. This stimulated the Belgian colonial authorities to officially sponsor the introduction of Tilapia into Lakes Luhondo and Bulera.…”

Section: Historic Account and Survey Of Datamentioning

confidence: 99%

The effects ofTilapia introductions in Lake Luhondo, Rwanda

Vos¹,

Snoeks

Audenaerde³

1990

Environ Biol Fish

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SynopsisCyprinid fishes apparently constituted the major part of the original fish fauna in Lake Luhondo, Rwanda, at least until 1934. At that time only three species, all cyprinids, were known from the lake: Barbus neumayeri, a small barbel, very common in the lake (described from the lake as Barbus luhondo) and two larger cyprinid species: Barbus microbarbis and Varicorhinus ruandae. These two large species were probably not very common in the lake. Between 1935 and 1938 some young Tilapia were introduced into Lake Luhondo. Since then and certainly since 1952 the large cyprinids seem to have disappeared completely from the lake. The small Barbus neumayeri has become extremely rare; at present it survives only in some small tributaries of the lake. In the lake itself Tilapia and Haplochromis species are now the dominant fauna. A survey of the available information is given.

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Scientific Results of the Cambridge Expedition to the East African Lakes, 1930-1.-11. The Cichlid Fishes.

Cited by 41 publications

References 1 publication

The origin and age of haplochromine fishes in Lake Victoria, East Africa

The origin and age of haplochromine fishes in Lake Victoria, East Africa

The Effects of Predation by Nile Perch, Lates niloticus L., on the Fish of Lake Nabugabo, with Suggestions for Conservation of Endangered Endemic Cichlids

The effects ofTilapia introductions in Lake Luhondo, Rwanda

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