Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Do Rainbow Trout and Their Hybrids Outcompete Cutthroat Trout in a
  Lentic Ecosystem?   Much has been written about introduced rainbow trout interbreeding and
outcompeting native cutthroat trout. However, specific mechanisms have not been
thoroughly explored, and most data is limited to lotic ecosystems. Samples of
Snake River cutthroat trout (Oncorhynchus clarkii bouvieri), the
rainbow-cutthroat hybrid, the cutbow trout (Onchorhynchus mykiss x clarkii),
and rainbow trout (Oncorhynchus mykiss), were obtained from a lentic ecosystem
(Eleven Mile Reservoir, Colorado) by creel surveys conducted from May to
October, 2012. The total length and weight of each fish was measured and the
relative condition factor of each fish was computed using expected weight from
weight-length relationships from the Colorado Division of Parks and Wildlife
(CDPW). Data from the CDPW collected from 2003-2010 in the same lentic
ecosystem were used to compute relative condition factors for additional
comparison, as was independent creel survey data from 2011. Cutthroat trout
were plump: the mean relative condition factor of the cutthroat trout was
112.0% (+/- 1.0%). Cutbow hybrid trout were close to the expected weights with
a mean relative condition factor of 99.8% (+/- 0.6%). Rainbow trout were
thinner with a mean relative condition factor of 96.4% (+/- 1.4%). Comparing
mean relative condition factors of CDPW data from earlier years and plotting
the 2012 data relative to percentile curves also shows the same trend of
cutthroat trout being plumper than expected and rainbow trout being thinner
than the cutthroat trout, with the hybrid cutbow trout in between. This data
supports the hypothesis that rainbow trout do not outcompete cutthroat trout in
lentic ecosystems. Comparison with data from three other Colorado reservoirs
also shows that cutthroat trout tend to be more plump than rainbow trout and
their hybrids in sympatric lentic ecosystems.

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The categories of this paper are: math
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The categories of this paper are: q-alg
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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: physics
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph