The Shrimp Caridina nilotica in Lake Victoria (East Africa), Before and After the Nile Perch Increase

  title={The Shrimp Caridina nilotica in Lake Victoria (East Africa), Before and After the Nile Perch Increase},
  author={K. P. Goudswaard and Frans Witte and Jan H. Wanink},
The shrimp Caridina nilotica is a major prey of the introduced Nile perch in Lake Victoria. In spite of heavy predation, the density of shrimps increased after the Nile perch boom and the concomitant disappearance of the haplochromine cichlids. In the same period, the mean size of gravid shrimps and the size at first maturity declined. This seems to indicate an increased predation pressure on adult shrimps. Before the Nile perch upsurge, specialised shrimp eaters and piscivores, among the… 

The diet of Nile perch, Lates niloticus (L.) after resurgence of haplochromine cichlids in the Mwanza Gulf of Lake Victoria

The dietary shift from invertebrate feeding (shrimps) to feeding on fish (haplochromine cichlids) occurs at a smaller size than it did when Nile perch were taking primarily dagaa and juvenile Nileperch as their fish prey, which may have a positive impact on Nile perich recruitment.

Changes in abundance of Nile shrimp, Caridina nilotica (Roux) following the decline of Nile perch and recovery of native haplochromine fishes, Lake Victoria, Tanzanian waters

Increase in predation on juvenile C. nilotica by the recovering haplochromines, and juvenile perches, as well as environmental degradation, especially eutrophication and pollution, along with the effects of global warming impacts, account for the observed decline in C.nilotica.

The invasion of an introduced predator, Nile perch (Lates niloticus, L.) in Lake Victoria (East Africa): chronology and causes

Nile perch, a large predatory fish, was introduced into Lake Victoria in 1954. The upsurge of Nile perch in Lake Victoria was first observed in the Nyanza Gulf, Kenya, in 1979. In Ugandan waters this

Ontogenic Changes in Prey Ingested by Nile perch (Lates niloticus) Caught in Nyanza Gulf of Lake Victoria, Kenya

Nile perch is a predatory fish, feeding mainly on C. nilotica, haplochromines, tilapia, Nile perch and other fish materials.

Guilty as charged: Nile perch was the cause of the haplochromine decline in Lake Victoria

  • B. Marshall
  • Environmental Science
    Canadian Journal of Fisheries and Aquatic Sciences
  • 2018
The chronology indicates that accelerated eutrophication of the lake followed rather than preceded the haplochromine collapse, suggesting that eutophication was not its cause.

Nile perch and the transformation of Lake Victoria

It is concluded that the haplochromine destruction disrupted the complex food webs that existed prior to the upsurge of Nile perch, and the condition of the lake appears to have stabilised since 2000, partly because the fish biomass has risen to at least 2 × 106 t, replacing the ‘lost’ biomass and restoring some ecosystem functioning.

Spatial and seasonal patterns in the feeding habits of juvenile Lates niloticus (L.), in the Mwanza Gulf of Lake Victoria

Stomach content analysis showed that with increase in size, the diet of Nile perch shifted from zooplankton and midge larvae, to macro-invertebrates (shrimps and dragonfly nymphs) and fish, and the contribution of prey types appeared to be habitat related.

Did the loss of phytoplanktivorous fish contribute to algal blooms in the Mwanza Gulf of Lake Victoria?

Possible causes of the increased algal blooms in Lake Victoria in the 1980s have been disputed by several authors; some suggested a top-down effect by the introduced Nile perch, whereas others

The Nile perch invasion in Lake Victoria: cause or consequence of the haplochromine decline?

It is hypothesized that the shift to Nile perch was a consequence of an externally caused, climate-triggered decrease in haplochromine biomass and associated recruitment failure rather than a direct cause of the introduction.



Changes in the diet of Nile perch, Lates niloticus (L), in the Mwanza Gulf, Lake Victoria

Seasonal differences in diet composition probably reflect seasonal fluctuations in the abundance of the main prey species.

The catfish fauna of Lake Victoria after the Nile perch upsurge

Stocks of the indigenous catfish species of Lake Victoria have decreased dramatically since the beginning of the 1980s. This decline coincided with the Nile perch boom and concomitant ecological

Effects of Nile perch (Lates niloticus) introduction into Lake Victoria, East Africa, on the diet of Pied Kingfishers (Ceryle rudis)

In recent years the ichthyofauna of Lake Victoria, the world's largest tropical lake, has gone through dramatic changes. The population of Nile perch, a large predator which has been introduced into

Changes in the feeding biology of the Nile perch, Lates niloticus (L.) (Pisces: Centropomidae), in Lake Victoria, East Africa since its introduction in 1960, and its impact on the native fish community of the Nyanza Gulf

The present investigation has revealed that the diet of Lates niloticus is now almost entirely comprised of Caridina nilotica, a small microphagous prawn, and juvenile Lates, a result of the shattering impact Lates predation has had on the native fishes, which have been virtually wiped out.

Cascading Effects of the Introduced Nile Perch on the Detritivorous/Phytoplanktivorous Species in the Sublittoral Areas of Lake Victoria

Preliminary evidence is presented that the stock of the detritivorous haplochromines that formerly comprised most of the demersal ichthyomass has been replaced by the prawn, and the possible mechanisms underlying this major change in the food web are discussed.

Low-Oxygen Tolerance of the Atyid Prawn, Caridina Nilotica, in Lake Victoria (East Africa): Implications for Refuge from Nile Perch Predation

Eutrophication of Lake Victoria has led to substantial depletion of hypolimnetic dissolved oxygen concentrations. One major consequence of this altered state is the potential loss of habitat for

The destruction of an endemic species flock: quantitative data on the decline of the haplochromine cichlids of Lake Victoria

The species composition of haplochromines in a research area in the Mwanza Gulf of Lake Victoria prior to the Nile perch upsurge is described, which would imply that approximately 200 of the 300+ endemic haplochromaine species have already disappeared, or are threatened with extinction.

Caridina Nilotica : Spatial Distribution and Egg Production in Lake Victoria, Uganda

The freshwater prawn Caridina nilotica, a major prey for juvenile Nile perch, Lates niloticus, is abundant in both shallow and deep regions of Lake Victoria. The shrimp exploits the full water column