Document of bibliographic reference 331109

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Necrosis in a population of Petrosia ficiformis (Porifera, Demospongiae) in relation with environmental stress

Abstract

Healthy specimens of the Mediterranean Petrosia ficiformis har bour endocellular cyanobacteria (Aphanocapsa feldmanni) caus ing a violet pigmentation of the sponge. Necrosis in P. ficiformis can be easily detected by the occurrence of white patches scat tered over the surface. Necrotic specimens were examined along the Gallinara Island coasts (Western Ligurian Sea), in coincidence with environmental stress (heavy rainfall, land run‐off, high sea‐water temperature). The appearance of white patches is due to the gradual sloughing of the pinacodermal covering, as evidenced by scanning electron microscopic observations. Sloughing leads to progressive tissue degeneration in the deeper parts. Histologi‐cal sections showed that, concomitantly with the loss of the su perficial layer, internal sponge tissues degenerate and the sponge body becomes exposed to the invasion of ciliates. Spicule bun dles of the skeletal network separate damaged tissues from the healthy ones, thereby slowing down spread of necrosis and en abling successful recovery.

WebOfScience code

https://www.webofscience.com/wos/woscc/full-record/WOS:000169978500008

Bibliographic citation

Cerrano, C.; Magnino, G.; Sarà, A.; Bavestrello, G.; Gaino, E. (2001). Necrosis in a population of Petrosia ficiformis (Porifera, Demospongiae) in relation with environmental stress. Ital. J. Zoolog. 68(2): 131-136. https://dx.doi.org/10.1080/11250000109356397

Topic

Marine

Is peer reviewed

true

Access rights

open access

Is accessible for free

true