#arg-group"></a></dt>
<dd><p>A string that contains the sub-group of <code>species</code> for which to find the Ws coefficients; e.g., things like “lotic”, “lentic”, “female”, “male”.</p></dd>


<dt id="arg-units">units<a class="anchor" aria-label="anchor" href="#arg-units"></a></dt>
<dd><p>A string that indicates whether the coefficients for the standard weight equation to be returned are in <code>"metric"</code> (DEFAULT; mm and g) or <code>"English"</code> (in and lbs) units.</p></dd>


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