kerathrus individuals were molt staged by microscopic examinations of the uropod
setae according to .
Such low recapture percentages likely were affected by tag shedding, death of tagged individuals by mechanical injury, and regeneration of the uropod
(Wang et al.
Characters such as uropod
articulation and relative pereonite length have been shown to vary considerably according to developmental stage (Larwood 1940; Masunari 1983; Larsen 2005; Bamber 2010), in this genus as well as amongst other tanaids (Larwood 1954; Bird 2008).
Into each trap was placed a sample of approximately 40 male rock lobsters, each of which had been measured (CL) and marked by cutting a notch in its uropod
These areas included the tips of each claw (n = 2); the inside of each claw (n = 2); claws (n = 2); claw "shoulders" (n = 2); rostrum (n = 1); around each eye (n = 2); left, center, and right carapace (n = 3); each abdominal segment (n = 6); and each tail uropod
(n = 5).
One week before the start of the experiment, a standard v-notch tool (used by North Cape v-notchers in the field) was used to mark each lobster in the experimental group with a v-notch in the right uropod
next to the telson.
The molt stage was determined by examining the uropod
in which partial retraction of the epidermis could be observed (Peebles 1977).
with broad mmi; exopod with two small spines at posterolateral angle and with distinct transverse suture; posterolateral projection of protopod terminally blunt.
Molt stage was determined by examination of setogenesis via changes in the seta on the margin of the inner uropod
, in accordance with Smith and Dall (1985).
from the tip of the rostrum to the tip of the unfolded uropods
, to the nearest 0.
In between the uropods
is a tail-like segment called the telson.
Each female was branded by the ablation and cuts on the uropods