Change in fish fauna as indication of aquatic ecosystem condition in Rio Grande de Morelia-Lago de Cuitzeo Basin, Mexico

Eduardo Soto-Galera, Joel Paulo-Maya, Eugenia López-López, José Angel Serna-Hernández, John Lyons

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The Rio Grande de Morelia-Lago de Cuitzeo basin in west central Mexico has experienced major increases in water pollution from a rapidly growing human population. We examined changes in the long-term distribution of fishes in relation to water quality and quantity in order to assess the condition and health of aquatic ecosystems in the basin. Sampling between 1985 and 1993 revealed that five (26%) of the 19 native fish species known from the basin had been extirpated. Two of these were endemics, Chirostoma charari and C. compressum, and they are presumed extinct. Twelve (63%) of the remaining species had declines in distribution. Sixteen (80%) of the 20 localities sampled had lost species. The greatest declines occurred in Lago de Cuitzeo proper and in the lower portion of the Rio Grande de Morelia watershed. Species losses from the lake were attributable to drying and hypereutrophication of the lake because of substantial reductions in the amount and quality of tributary inputs, whereas losses from the Rio Grande de Morelia watershed were the result of pollution from agricultural, municipal, and industrial sources, especially in the region around the city of Morelia. Three localities in the upper portion of the Rio Grande de Morelia watershed- Cointzio reservoir, La Mintzita spring, and Insurgente Morelos stream- contained most of the remaining fish species diversity in the basin and deserve additional protection. Fish faunal changes indicated major declines in the health of aquatic ecosystems in the Morelia-Cuitzeo basin.
Original languageAmerican English
Pages (from-to)133-140
Number of pages118
JournalEnvironmental Management
DOIs
StatePublished - 1 Jul 1999

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Rio Grande (North America)
Aquatic ecosystems
fishes
Mexico
ecosystems
aquatic ecosystem
Fish
animals
indication
Watersheds
fauna
fish
basin
Lakes
watershed
lakes
Health
health
Water pollution
water pollution

Cite this

Soto-Galera, Eduardo ; Paulo-Maya, Joel ; López-López, Eugenia ; Serna-Hernández, José Angel ; Lyons, John. / Change in fish fauna as indication of aquatic ecosystem condition in Rio Grande de Morelia-Lago de Cuitzeo Basin, Mexico. In: Environmental Management. 1999 ; pp. 133-140.
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Change in fish fauna as indication of aquatic ecosystem condition in Rio Grande de Morelia-Lago de Cuitzeo Basin, Mexico. / Soto-Galera, Eduardo; Paulo-Maya, Joel; López-López, Eugenia; Serna-Hernández, José Angel; Lyons, John.

In: Environmental Management, 01.07.1999, p. 133-140.

Research output: Contribution to journalArticle

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