Artificial propagation is commonly used to reduce extinction risk for native, imperiled fish species. Thus, identifying stocking strategies that most effectively augment adult abundance a critical aspect of successful adaptive management. The threatened June sucker ( Chasmistes liorus) , endemic Utah Lake, UT, USA, experienced major declines in following extensive ecosystem degredation. Over 80...

Although most human beings experience no difficulty in perceiving their native language, strong individual differences are observed for certain foreign phonemic contrasts. Diaz, Baus, Escera, Costa, and Sebastian-Galles (2008, Brain potentials to native phoneme discrimination reveal the origin of individual differences in learning the sounds of a second language. Proceedings of the National Aca...

Understanding the stoichiometry of nitrogen (N) and phosphorus (P) plays a pivotal role in ecological restoration degraded landscapes. Here, N P limitation dominant tree species mine-disturbed ultramafic areas Southern Philippines are reported. Field surveys revealed that out total 1491 trees/shrubs recorded from all quadrats, comprising 22 native 9 non-native species, there were six (native: A...

Predicting the invasive potential of introduced species remains an ongoing challenge due to the multiple interacting regional and global processes that facilitate the introduction and proliferation of alien species. This may be particularly true in regions where native species are increasingly reported as expanding and impacting ecosystems in ways indistinguishable from alien ones. Current appr...

Anacker, R. L. (National Institute of Allergy and Infectious Diseases, Rocky Mountain Laboratory, Hamilton, Mont.), R. A. Finkelstein, W. T. Haskins, M. Landy, K. C. Milner, E. Ribi, and P. W. Stashak. Origin and properties of naturally occurring hapten from Escherichia coli. J. Bacteriol. 88:1705-1720. 1964.-Haptens found in preparations of endotoxin and in fractions of disrupted cells, partic...

South America has a complex demographic history shaped by multiple migration and admixture events in pre- and post-colonial times. Settled over 14,000 years ago by Native Americans, South America has experienced migrations of European and African individuals, similar to other regions in the Americas. However, the timing and magnitude of these events resulted in markedly different patterns of ad...

This paper compares the effectiveness of n-way (n > 2) classification using a probabilistic classifier to the use of multiple binary probabilistic classifiers. We describe the use of binary classifiers in both Round Robin and Elimination tournaments, and compare both tournament methods and n-way classification when determining the language of origin of speakers (both native and non-native Engli...

Propolis from central Chile was investigated for its plant origin by microscopical analysis of pollen grains and leaf fragments found in the sample. The pollen grains that appear with significant higher frequency in the sample corresponded to four native and two introduced species, whereas leaf fragments corresponded to four native species. Seventeen phenolic compounds that belong to the phenyl...

randomly amplified polymorphic dna (rapd) markers were used to study the genetic diversity and discriminate among 17 unknown genotypes (considered potentially salt tolerant) and 16 known olive cultivars. fifteen decamer primers which produced 38 reproducible polymorphic bands in the genotypes were selected for analysis. the rapd markers resulted in 93 distinct banding patterns. based on either ...

In this study we report the first animal invasion, to our knowledge, into Lake Malawi. The colonizer is a non-native morph of the gastropod Melanoides tuberculata that differs substantially in external shell characters from co-occurring indigenous forms. However, because the species possesses extensive within-Africa geographical variation in shell morphology, it was unclear whether the invasion...