Adaptive responses in resurgent Lake Victoria cichlids over the past 30 years

@article{Rijssel2012AdaptiveRI,
  title={Adaptive responses in resurgent Lake Victoria cichlids over the past 30 years},
  author={Jacco C. van Rijssel and Frans Witte},
  journal={Evolutionary Ecology},
  year={2012},
  volume={27},
  pages={253-267}
}
Textbook examples of adaptive radiation like the Galapagos finches and the East-African cichlids form a subject of major interest in evolutionary biology. Many of these species often show rapid morphological changes in response to a perturbed environment. The dramatic ecological changes in Lake Victoria during the past three decades, e.g. Nile perch predation and eutrophication, provide a unique opportunity to study environmental effects on cichlid morphology. Preliminary research has revealed… Expand

Figures and Tables from this paper

Adaptive responses to environmental changes in Lake Victoria cichlids
TLDR
This research showed that the Lake Victoria cichlids are able to adapt extremely fast which is likely to have contributed to their extreme fast adaptive radiation. Expand
Fast adaptive responses in the oral jaw of Lake Victoria cichlids
TLDR
This study shows how four haplochromine cichlids adapted their premaxilla to a changed diet over the past 30 years, indicating a potential for extremely fast adaptive responses to environmental fluctuations, which are likely inflicted by competition release and increase, and might have a bearing on the ability of haplochromaines to cope with environmental changes. Expand
Climatic variability in combination with eutrophication drives adaptive responses in the gills of Lake Victoria cichlids
TLDR
The changes in Lake Victoria's water quality coincide with fluctuations in cichlid gill surface area, suggesting that these fish can respond rapidly to environmental perturbations, but also that climatic variability, together with continued eutrophication, might be detrimental to the lake’s cichLid biodiversity. Expand
Little evidence for morphological change in a resilient endemic species following the introduction of a novel predator
TLDR
Testing whether the introduction of the piscivorous Nile perch into East Africa's Lake Victoria coincided with morphological change in one resilient native prey species, the cyprinid fish Rastrineobola argentea, found no clear evidence of predator‐associated change in body shape over time. Expand
Changing ecology of Lake Victoria cichlids and their environment: evidence from C13 and N15 analyses
TLDR
Findings that preserved specimens can be used to trace historical changes in fish ecology and the aquatic environment are confirmed and highlight the need for continued sampling as this information could be of essence for reconstructing and predicting the effects of environmental changes. Expand
Contemporary phenotypic change in correlated characters in the African cyprinid, Rastrineobola argentea
TLDR
Whether and how three suites of neighbouring structures have changed over time in Rastrineobola argentea, a small pelagic cyprinid fish that is endemic to the Lake Victoria Basin in East Africa, is explored. Expand
Differential recovery and spatial distribution pattern of haplochromine cichlids in the Mwanza Gulf of Lake Victoria
TLDR
The study revealed that the resurgent trophic guilds were more widely distributed in the 2000s than in the 1970s, and possible causes for the recovery including a decline in the Nile perch population, eco-morphological adaptations of the haplochromines and habitat extension are discussed. Expand
The occurrence of an Eastern African haplochromine cichlid in the Ituri River (Aruwimi, Congo basin): adaptive divergence in an introduced species?
TLDR
The results revealed the Ituri specimens to differ from the types of ‘H’. Expand
A pharyngeal jaw evolutionary innovation facilitated extinction in Lake Victoria cichlids
TLDR
Evidence is presented that the modified pharyngeal jaws of cichlid fishes and several marine fish lineages, a classic example of evolutionary innovation, are not universally beneficial and a large-scale analysis of dietary evolution reveals that the innovation compromises access to energy-rich predator niches. Expand
Can differential resurgence of haplochromine trophic groups in Lake Victoria be explained by selective Nile perch, Lates niloticus (L.) predation?
TLDR
Comparisons of the frequency of occurrence of the detritivores and zooplanktivores in the stomachs of the Nile perch and their FOO in the lake showed that selective predation by Nileperch cannot explain the relatively slow resurgence of detritvores. Expand
...
1
2
3
4
...

References

SHOWING 1-10 OF 113 REFERENCES
Major morphological changes in a Lake Victoria cichlid fish within two decades
TLDR
Remarkably, head length, eye length, and head volume decreased in size, whereas cheek depth increased, and total gill surface in resurgent H. pyrrhocephalus increased by 64%. Expand
Photopic adaptations to a changing environment in two Lake Victoria cichlids
TLDR
The results obtained imply that these resurgent zooplanktivores are capable of adapting their eye morphology to the changed environmental conditions without losing crucial aspects used for survival and reproduction. Expand
Cichlid species diversity in naturally and anthropogenically turbid habitats of Lake Victoria, East Africa
TLDR
Clear water seems to support differentiation in feeding techniques as well as year-round spawning, and both may facilitate species coexistence, which may explain why, since the decline of Nile perch, haplochromine densities have recovered, the numbers of hybrids increased and species diversity in the current eutrophic sub-littoral waters has remained 70 % lower than before the environmental changes. Expand
Lost zooplanktivorous cichlid from Lake Victoria reappears with a new trade
TLDR
The authors' observations provide a new example of the extreme versatility in feeding behaviour in haplochromine cichlids, as it had been suggested that, because of anatomical constraints, molluscivory and zooplanktivory are incompatible in cICHlid fish. Expand
PHENOTYPIC PLASTICITY AND HETEROCHRONY IN CICHLASOMA MANAGUENSE (PISCES, CICHLIDAE) AND THEIR IMPLICATIONS FOR SPECIATION IN CICHLID FISHES
  • A. Meyer
  • Biology, Medicine
  • Evolution; international journal of organic evolution
  • 1987
TLDR
The influence of diet on trophic morphology during ontogeny in Cichlasoma managuense was examined and two groups of full siblings were fed two different diets for eight months after the onset of feeding; thereafter both groups were fed a common diet. Expand
An Introduction To the Taxonomy and Morphology of the Haplochromine Cichlidae From Lake Victoria
TLDR
The importance of identification for both fishery-biology, ecology and other biological research has been the main reason for writing this paper which introduces the techniques applied in the taxonomy of the haplochromine Cichlidae from Lake Victoria. Expand
Species Distinction and the Biodiversity Crisis in Lake Victoria
TLDR
By studying cichlid communities, trophic groups, and individual species, researchers uncovered differential diversity in gross morphology and the presence of intraspecific variation that made it difficult to distinguish among species. Expand
Dietary shift in benthivorous cichlids after the ecological changes in Lake Victoria
TLDR
The small benthivores shifted from a diet dominated by detritus and phytoplankton, supplemented with small quantities of midge larvae and zooplankon, to a diet of invertebrate preys of larger sizes, and apparently have a more carnivorous than a herbivorous diet. Expand
Experimental evidence for adaptive phenotypic plasticity in a rock-dwelling cichlid fish from Lake Victoria
TLDR
Adaptive phenotypic plasticity is demonstrated in Neochromis greenwoodi, a rock-dwelling haplochromine cichlid from Lake Victoria, and the possible role of PP in allopatric and sympatric speciation is discussed. Expand
...
1
2
3
4
5
...