The marine sponge Ianthella basta can recover from stress-induced tissue regression

Luter, Heidi M., Whalan, Stephen, and Webster, Nicole S. (2012) The marine sponge Ianthella basta can recover from stress-induced tissue regression. Hydrobiologia, 687 (1). pp. 227-235.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only

View at Publisher Website:


Sponges often exhibit tissue regression in response to stressful conditions. This study investigated whether handling stress invoked tissue regression in Ianthella basta and assessed whether sponges could recover from this regressed tissue state. Six necrotic specimens and 12 healthy explants were collected at Orpheus Is. Australia and transported to aquarium facilities. Sponges were photographed daily and an integrated density (ID) measurement was used to quantify tissue regression. Histological samples were taken from sponge explants to compare cellular organization. Bacterial communities of regressed and recovered tissue were compared using Denaturing Gradient Gel Electrophoresis (DGGE). After 12 h both necrotic and healthy sponges displayed substantial tissue regression. However, within 72 h all sponges recovered to their original condition. The ID of the sponge tissue doubled, confirming tissue recovery in I. basta. Sponges affected by tissue regression had significantly fewer choanocyte chambers and more densely packed granulated cells than recovered sponges. DGGE revealed the same microbial symbionts in both regressed and recovered sponges. Handling stress associated with collection and transportation is sufficient to invoke tissue regression in this species, but sponges can rapidly recover. This study contributes to our understanding of how sponges respond to environmental pressures, influencing population resilience and persistence.

Item ID: 22100
Item Type: Article (Research - C1)
ISSN: 1573-5117
Keywords: choanocyte chambers, histology, symbiont, Porifera, stress response
Date Deposited: 28 Jun 2012 16:15
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830199 Fisheries - Aquaculture not elsewhere classified @ 100%
Downloads: Total: 2
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page