Species Introduction in a Tropical Lake

  title={Species Introduction in a Tropical Lake},
  author={Thomas M. Zaret and Robert T. R. Paine},
  pages={449 - 455}
Probably in early 1967, a piscivore from South America, Cichla ocellaris, was introduced to Gatun Lake in the Panama Canal Zone. As this predator population spread through the lake, the initial effect was dramatic reductions in almost all secondary consumers. These species reductions produced, in turn, second- and third-order changes at other trophic levels of the ecosystem. The resulting changes in the lake community can be seen best by examining the general Gatun Lake food web. The decrease… 
Dynamics of the haplochromine cichlid fauna and other ecological changes in the Mwanza Gulf of Lake Victoria
Lake Victoria, the largest tropical lake in the world (Fig. 6.1), was until recently a typical cichlid lake. Eighty percent of the demersal ichthyomass of this East African lake consisted of
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.
Anthropogenically induced fish diversity reduction in Lake Valencia Basin, Venezuela
Lake Valencia in north central Venezuela, one of the largest natural inland bodies of water north of the equator, is undergoing a very rapid deterioration process as a consequence of
Fish fauna destruction after the introduction of a non-native predator (Cichla kelberi) in a Neotropical reservoir
Results from this natural experiment provided evidence supporting the collapse of fish assemblages soon after the introduction of C. kelberi, revealing an important homogenizing force behind this predator and stresses the need for control measures that prevent new transferences among South American basins.
Initial Six-year Expansion of an Introduced Piscivorous Fish in a Tropical Central American Lake
Two populations of the piscivorous fish Gobiomorus dormitor were examined in two separate crater lakes in Nicaragua, Central America, with general behaved as a successful invading species, displaying exponential growth, year-round reproduction, and higher foraging success than the natural population of Lake Xiloá.
Ecology and origin of the introduced cichlid Acarichthys heckelii in Singapore’s fresh waters—first instance of establishment
Investigation of the distribution, diet, growth and reproductive ecology of the South American cichlid fish in Singapore, as well as its possible route of introduction, found that A. heckelii is largely restricted to artificial freshwater bodies, although a sizable established population occurs in a modified waterway connected to Nee Soon Swamp Forest.
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.
A successful case of biological invasion: the fish Cichla piquiti, an Amazonian species introduced into the Pantanal, Brazil.
Perhaps, the tucunaré's capacity to lay more than one batch of eggs in a reproductive period, as well as its care of eggs and young, lead them to establish themselves successfully in new environments, as has been observed in the Pantanal and other localities.
Fish Introductions into North America: Patterns and Ecological Impact
  • P. Moyle
  • Environmental Science, History
  • 1986
The transplantation of fishes has a long history in Western culture, beginning with the Romans, who brought carp (Cyprinus carpio) from the Danube River to Italy (Balon 1975). As Christianity spread
Recent invasions of the Gulf of Maine : three contrasting ecological histories
Introduced species are common members of estuarine communities where their role as competitors and predators is of concern, This paper examines the invasion of Gulf of Maine benthic habitats by the


Predator‐Prey Interaction in a Tropical Lacustrine Ecosystem
Complementary field and laboratory studies support the conclusion that the stable polymorphism of Ceriodaphnia cornuta, found only in the near—shore waters is maintained by predation pressure from melaniris chagresi.
Competition in tropical stream fishes : support for the competitive exclusion principle
This seasonal coincidence of the most distinct species separations with the time of increased competition are exactly those consequences predicted by the principle of competitive exclusion, providing strong support for the validity of this principle.
Ecosystem Alteration by Mosquitofish (Gambusia affinis) Predation
In artificial pools Gambusia affinis greatly reduced rotifer, crustacean, and insect populations and thus permitted extraordinary development of phytoplankton populations (2x108 cells per
  • T. Zaret
  • Environmental Science, Biology
  • 1972
The selective forces of reproductive potential and liability to predation that balance a polymorphism of the cladoceran CeTiodup~niu corn&z are examined. Neither Brooks’ “body-size hypothesis” nor
Fossil Maize from Panama
Wild maize, agricultural maize, and associated Manihot fossil polleni indicative of early agriculture after about 7300 years ago have been discovered in the Gatun basin, Panama. The course of risinig
Ship canals and aquatic ecosystems.
Predation, Body Size, and Composition of Plankton.
The effect of a marine planktivore on lake plankton illustrates theory of size, competition, and predation.
255 (1969) gives some additional information, including breeding behavior of Cichla
  • Soc. London Zool