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Modeling trophic interactions in Lake Kivu: What roles do exotics play? ArchiMer
Villanueva, Ching-maria; Isumbisho, M; Kaningini, B; Moreau, J; Micha, J.
An Ecopath model of the southern part of Lake Kivu, a deep African equatorial lake was constructed to quantitatively describe the possible impact of fish introductions in this ecosystem. This study is considered as an initial step in summarizing ecological and biological information, under a coherent framework, on this ecosystem. Fourteen compartments were considered. As a phytoplankton-based food web, it is observed that key food sources are not fully utilized as transfer efficiencies per trophic levels (TL) varies between 4.5 and 9.4%. Zooplankton plays a major role in transferring organic matter from TL1 to higher TLs due to the abundance of zooplanktivores. Shifts in food preferences and distribution of some of the fish functional groups were observed...
Tipo: Text Palavras-chave: Lake Kivu; Exotic fishes; Invasion; Transfer efficiency; Food web structure.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4722.pdf
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Invasive vertebrate species in Chile and their control and monitoring by governmental agencies RChHN
AGUSTÍN IRIARTE,J.; LOBOS,GABRIEL A.; JAKSIC,FABIÁN M..
We provide an overview of the current status of vertebrate invasive species throughout Chile, updating information on terrestrial exotics and reporting for the first time the situation of exotic freshwater fishes. In addition, we document the legislation and programs that the Chilean government has implemented to limit the entry of exotics to the country or minimize their impact on native wild flora and fauna and on natural ecosystems. We document what is known about the introduction of 26 exotic fish species to continental waters of the country, discussing the distribution and putative effects of those 11 species that may be considered invasive. From a previous list of 24 terrestrial vertebrate invaders, we withdraw the Argentine tortoise (Chelonoidis...
Tipo: Journal article Palavras-chave: Exotic fishes; Exotic amphibians; Exotic reptiles; Exotic birds; Exotic mammals.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000100010
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