Fig 1.
Individuals of P. ochraceus with signs of SSWD.
(A) Typical arm twisting behavior involved contortions of one or more arms toward the oral disk, often observed prior to lesion spread or development. (B) ‘Corkscrew’ arm twisting, contortions were generally limited to one arm and involved the twisting of the affected arm about a central axis, and often observed immediately prior to shedding of the affected arm. (C) Shedding of one or more arms generally occurred 1–5 days after observing substantial lesioning; several individuals displayed perforated aboral lesions with protruding pyloric cecae or gonads (arrow). (D) Close-up of the wound produced by a recent arm-shedding event, solid masses of lesioned tissue (arrowheads) often appeared to close or occlude openings in the coelomic cavity, though gonads and pyloric cecae (arrow) were often observed to protrude through wounds produced by arm shedding.
Table 1.
Definitions of morbidities of SSWD.
Fig 2.
Average time to death in each temperature treatment.
Error bars represent ± standard error.
Fig 3.
Morbidity vs. time in each temperature treatment.
Error bars represent ± standard error.
Table 2.
Results of the generalized linear mixed effects model contrasting effects of housing at 9.0°C or 12°C on SSWD-mediated morbidity.