# load covariates: salinity</span></a>
<a class="sourceLine" id="cb15-8" title="8"><span class="kw">data</span>(<span class="st">&quot;salinity_list&quot;</span>)</a>
<a class="sourceLine" id="cb15-9" title="9">salinity &lt;-<span class="st"> </span>salinity_list[my.sp]</a>
<a class="sourceLine" id="cb15-10" title="10"><span class="co"># keep only salinity column</span></a>
<a class="sourceLine" id="cb15-11" title="11"><span class="cf">for</span>(i <span class="cf">in</span> <span class="dv">1</span><span c