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Inificant differ-
<br />imprinted sub-
<br />,en though the
<br />our study were
<br />a, they still ag-
<br />04 before peak
<br />,orback suckers
<br />:r suggested the
<br />in the area they
<br />mber were cap-
<br />.ggregation near
<br />though stocked
<br />pawning aggre-
<br />imprinting may
<br />-eared fish mov-
<br />;ations that pro-
<br />;e-0 fishes they
<br />suckers in the
<br />am areas of al-
<br />), which allows
<br />tted floodplains
<br />t nursery habitat
<br />the larvae of
<br />activity below
<br />a higher risk of
<br />ng may not pre-
<br />wning, it has the
<br />awning site se-
<br />ll.
<br />:essfully repro-
<br />ws (Muth et al.
<br />et al. 1991), and
<br />tl. 2003). Hatch-
<br />in our study ap-
<br />and presumably
<br />;regations. They
<br />tted in a primary
<br />gaged in spawn-
<br />hatchery-reared
<br />contributing to
<br />enges associated
<br />plementation of
<br />ie most efficient
<br />size and timing
<br />adherence to a
<br />ting system that
<br />'e 1986). Genetic
<br />in that the small
<br />sped or replaced
<br />NS 2002). Dowl-
<br />ss of genetic di-
<br />ick suckers. Giv-
<br />3e the abundance
<br />ions of razorback
<br />RAZORBACK SUCKER SPAWNING IN THE GREEN RIVER
<br />suckers with large numbers of reproducing indi-
<br />viduals, the challenge of recovery remains in im-
<br />proving the factors that originally caused the de-
<br />cline of the species, such as the failure of recruit-
<br />ment due to lack of adequate nursery habitat (Mod-
<br />de et al. 2001; Modde 2004) and negative
<br />interactions with nonnative species, particularly
<br />among early life stages (Marsh and Pacey 2004;
<br />Minckley and Deacon 1968).
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