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El estado poblacional de Xyrauchen texanus en el río “Middle Green” (EEUU)
Author(s) -
Modde Timothy,
Burnham Kenneth P.,
Wick Edmund J.
Publication year - 1996
Publication title -
conservation biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.2
H-Index - 222
eISSN - 1523-1739
pISSN - 0888-8892
DOI - 10.1046/j.1523-1739.1996.10010110.x
Subject(s) - sucker , floodplain , population , habitat , abundance (ecology) , ecology , fish <actinopterygii> , fishery , biology , geography , zoology , demography , sociology
The razorback sucker, Xyrauchen texanus , in the middle Green River (U.S.A.) has been described as a static population consisting of old individuals that will eventually disappear through attrition. Capture data between 1980 and 1992 indicated a constant length frequency despite a slow but positive growth rate of individual fish. Abundance and survival estimates indicated that the population of razorback sucker in the middle Green River is precariously low but dynamic. Although high variation existed among survival estimates, no significant decrease in the population between 1982 and 1992 could be detected. The low level of recruitment occurring in the razorback sucker population of the middle Green River was related to high‐flow years, indicating that floodplain habitats may be necessary for survival of the species.