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Oijen, M.J.P. van; Witte, F..

The zooplanktivorous Haplochromis tanaos spec. nov., and the morphologically very similar but insectivorous Haplochromis thereuterion spec. nov., from Lake Victoria (East Africa) are described and compared to Haplochromis diplotaenia Regan & Trewavas, 1928, a similar species which is known only from the holotype. Intraspecific variation is described for both new species. Ecological data of the new species are compared to those of known zooplanktivores and insectivores from the Mwanza Gulf area. Both new species disappeared concurrently with the Nile perch (Lates) upsurge early in the 1980's. The recent occurrence of individuals closely resembling the new species, in a different habitat close to the original one, is analysed.

A systematic revision of the piscivorous haplochromine Cichlidae (Pisces: Teleostei) of Lake Victoria (East Africa). Part I

Palavras-chave: Cichlidae; Haplochromis; Zooplanktivores; Insectivores; Ecological segregation; Intraspeci- fic variation; Ontogeny; Sexual heterodonty; Nile perch; Lates; Predation; Habitat shift.; 42.81.

Ano: 1996

URL: http://www.repository.naturalis.nl/record/317563

The distinction between Harpagochromis and Prognathochromis, and the distinction between these and other cichlid genera of Lake Victoria as proposed by Greenwood (1980), is demonstrated to be artificial. The BM(NH) collections of Haplochromis dichrourus and H. pellegrini were found to be polyspecific and are redescribed. On the basis of specimens formerly included in H. pellegrini a new species is described. Five new species are described based on material from the Mwanza Gulf and Maisome Island. Specimens of H. dichrourus from different areas of Lake Victoria are described separately to demonstrate geographic variation.

Haplochromis vonlinnei spec. nov., a piscivorous haplochromine cichlid (Teleostei, Perciformes) from the Mwanza Gulf area of Lake Victoria, Tanzania

Palavras-chave: Cichlidae; Piscivorous haplochromine cichlids; Lake Victoria; Haplochromis; Harpago- chromis; Prognathochromis; New species; Geographical variation.; 42.81.

Ano: 1991

URL: http://www.repository.naturalis.nl/record/317682

Oijen, M.J.P. van; Zeeuw, M.P. de.

A new species of haplochromine cichlid from Lake Victoria, only known from the Mwanza Gulf area is described.

Haplochromis howesi spec. nov., a crab and fish eating cichlid from Lake Victoria

Palavras-chave: Cichlidae; Piscivores; Lake Victoria; Haplochromis; New species; 42.81.

Ano: 2008

URL: http://www.repository.naturalis.nl/record/261776

A new, crab and fish eating Haplochromis species, with a piscivorous fades, occurring in rocky habitats in Lake Victoria is described. Special attention is given to the squamation of the dorsal and anal fin membranes. Food preferences of juveniles and adults are discussed, and the decline of this species, in a habitat in which piscivorous Nile perches do not occur, is analysed.

Seven new species of detritivorous and phytoplanktivorous haplochromines from Lake Victoria

Palavras-chave: Cichlidae; Crab eater; Piscivore; Lake Victoria; Haplochromis; New species; Fin squamation; 42.81.

Ano: 1992

URL: http://www.repository.naturalis.nl/record/319021

Zeeuw, M.P. de; Mietes, M.; Niemantsverdriet, P.; Huurne, S. ter; Witte, F..

Seven new species of haplochromine cichlids from Lake Victoria are described. They comprise four detritivorous and three phytoplanktivorous species. Their affinities to other Lake Victoria haplochromines are discussed.

Haplochromis ushindi spec. nov., the largest piscivorous cichlid in the Mwanza Gulf area of Lake Victoria (East Africa) before the Nile perch upsurge

Palavras-chave: Cichlidae; Detritivores; East Africa; Haplochromis; Phytoplanktivores; 42.81.

Ano: 2010

URL: http://www.repository.naturalis.nl/record/358750

A new species of a haplochromine cichlid (Pisces: Cichlidae: Haplochrominae) from Lake Victoria is described. It is the largest species known from the Mwanza gulf area before the Nile perch upsurge in 1986. Specimens have been collected between 1975 and 1985. Presumably, the species does not exist anymore and is considered to be extinct.

Taxonomy, ecology and fishery of Lake Victoria haplochromine trophic groups

Palavras-chave: Cichlidae; Piscivore; Lake Victoria; Haplochromis; New species; 42.81.

Ano: 2004

URL: http://www.repository.naturalis.nl/record/214432

Witte, F.; Oijen, M.J.P van.

Based on ecological and morphological features, the 300 or more haplochromine cichlid species of Lake Victoria are classified into fifteen (sub)trophic groups. A key to the trophic groups, mainly based on external morphological characters, is presented. Of each trophic group a description is given comprising data on taxonomy, ecology and fishery. As far as possible data from the period before the Nile perch upsurge and from the present situation are compared. A list of described species classified into trophic groups is added.

The generic classification of the haplochromine cichlids of Lake Victoria, East Africa

Palavras-chave: Ecology; Fishery; Haplochromis; Haplochromine cichlids; Key; Lake Victoria; Taxonomy; Trophic groups.; 42.81.

Ano: 1990

URL: http://www.repository.naturalis.nl/record/317685

In chronologic order of publication, all papers dealing with the systematics of haplochromine cichlids of Lake Victoria are analysed with regard to the generic classification of the species. Taxonomists have disputed and changed the generic classification soon after cichlids from Lake Victoria were first described. At the turn of the century, different opinions among taxonomists working on Lake Victoria haplochromines were mainly based on the fact that they studied different material. The study of more extensive collections yielded the impression that differences between the species are gradual, rendering the delimitation of genera problematic. Recently, an attempt to use cladistic methods for the unravelling of the phylogeny of the haplochromines has...