Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comments on "Analysis of permanent magnets as elasmobranch bycatch
  reduction devices in hook-and-line and longline trials"   A recent study (Fish. Bull. 109:394-401 (2011)) purportedly tests two
hypotheses: 1. that the capture of elasmobranchs would be reduced with hooks
containing magnets in comparison with control hooks in hook-and-line and
longline studies. 2. that the presence of permanent magnets on hooks would not
alter teleost capture because teleosts lack the ampullary organ. Review of this
paper shows some inconsistencies in the data supporting the first hypothesis
and insufficient data and poor experimental design to adequately test the
second hypothesis. Further, since several orders of teleosts are known to
possess ampullary organs and demonstrate electroreception, grouping all
teleosts in a study design or data analysis of magnetic hook catch rates is not
warranted. Adequate tests of the hypothesis that permanent magnets or
magnetized hooks do not alter teleost capture requires a more careful study
design and much larger sample sizes than O'Connell et al. (Fish. Bull.
109:394-401 (2011)).

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The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
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The categories of this paper are: econ