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DFC PROCEEDINGS - ALmmEncAL LIsmm of ABSTRACTS
<br />CONTRERA,S-BALDERAS, S.*; LOZANO-VILANO, M. DE L. (SCB.&aaa.r,. I& , A.C.. S. Ni d&. N.L. M&&. WV-Labaawd.
<br />de Ictido& F"tad de CkvwW BUdgim. UANL. San Nk", N.L.. M6dw)
<br />Survival status of the Sandia and Potosi Valleys' endemic pupfishes and crayfishes from the
<br />Mexican plateau in Nuevo Le6n, Mexico, with comments on extinct snails
<br />KEYWORDS: fishes; crayfish; extinction; Mexico; biodiversity
<br />ABSTRACT
<br />Exploration of the and SW Nuevo Le6n, Mexico has revealed the extinction of a number of recently
<br />described new species of living pupfishes and crayfishes, and extinct snails from isolated springs, as follows:
<br />Charco Palma: Cyprinodon lmgidorsalis, discovered 1984, extinct 1994. La Trinidad: C. inmemoriam and
<br />crayfish, discovered 1984, extinct 1986. Charco Azul: C. veronicae and crayfish, discovered 1984, barely
<br />surviving in 1994; the snails Valvata beltrani and Valvata sp. were extinct when discovered. La Presa: C.
<br />cedliae and crayfish, discovered 1988, extinct 1990. Potosi: Megupsilon aporus and Cyprinodon alvarezi
<br />discovered between 1948 and 1961, almost extinct 1994. Extinction was rapid due to depletion of aquifers
<br />for agricultural needs, which is irrational, not sustainable, and illegal. Conservation of this biodiversity, and
<br />the agriculture, needs regional management of the geohydrological basins. Also needed is a better
<br />interaction of scientists and technicians of the several disciplines on biodiversity - conservation -
<br />development and the other stakeholders in order to attain true sustainability.
<br />RESUMEN
<br />Las exploraciones del irido suroeste de Nuevo Le6n, Mexico, han revelado la extinci6n de un numero
<br />de especies red6ntemente descritas, de peces cachorritos y acociles vivientes, y caracoles extintos, de
<br />manantiales aislados, como sigue: Charco Palma: Cyprinodon longidorsalis, descubrimiento 1984, extinci6n
<br />1994. La Trinidad: C. inmemoriam y acodl, descubrimiento 1984, extinction 1986. Charco Azul: C. veronicae
<br />y acocil, descripd6n 1984, sobreviviendo en 1994; los extintos caracoles Valvata beltrani y Valvata sp. fueron
<br />descubiertos como conchas secas. La Presa: C wdliae y acodl, descubrimiento 1988, extind6n 1990.
<br />Potosi: Megupsilon aporus and Cyprinodon alvarezi descubrimientos de 1948 a 1961, casi extintos 1994. Las
<br />extinciones han sido ripidas a consecuencia de un abatimiento credente de mantos acuiferos para fines
<br />agricolas, irradonal, no sustentable a ilegal. La conservad6n de esta biodiversidad, y de la agricultura,
<br />requiere de manejo regional integral de las cuencas geohidrol6gicas. Se requiere mayor interaction de
<br />dentificos y tecnicos de todas las disdplinas reladonadas con biodiversidad - conservad6n - desarrollo para
<br />alcanzar la sustentabilidad.
<br />CONTRERAS-BALDERA,S, S. cBloooeserv.d6a4 A.C.. San Nkmlk, N.L. Mbdw)
<br />Mexican Rio Grande Area Coordinator Report - status of some fish communities and
<br />environmental legislation
<br />KEYWORDS: Mexico; Chihuahua; drought; pollution; environmental; legislation; sequia;
<br />contaminaci6n; legislaci6n
<br />ABSTRACT
<br />The long lasting recent drought in northeastern Mexico had a strong impact on Chihuahuan Desert
<br />fishes. Several localities in Chihuahua had been monitored from 1963 to the late 1980's, reporting
<br />reductions of the fish communities averaging 57.7%. Several of the Chihuahua-Durango localities were
<br />visited in May, 1995, finding the rivers completely dry: Estaci6n Sauz, Rio Florido at Jimenez, Rio Nazas
<br />across from Torre6n, Rio Carmen near Ahumada. Other localities had been converted into sewage canals
<br />and have no fish, such as Rio Chuviscar at Chihuahua, and at Aldama.
<br />The Federal Government of Mexico organized a nation-wide series of public hearings as the basis for
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