p.html">grep</a></span>(<span class="st">'Oncorhynchus'</span>, <span class="no">catal</span>$<span class="no">taxa</span>$<span class="no">variable</span>, <span class="kw">value</span> <span class="kw">=</span> <span class="fl">TRUE</span>), <span class="co"># fish genus</span>
              <span class="kw">exposure</span> <span class="kw">=</span> <span class="st">'aquatic'</span>,
              <span class="kw">duration</span> <span class="kw">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c