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Influence of spatial competitor on the growth and regeneration of the marine sponge Cinachyrella cf. cavernosa (Porifera, demospongiae)

DRS at CSIR-National Institute of Oceanography

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Title Influence of spatial competitor on the growth and regeneration of the marine sponge Cinachyrella cf. cavernosa (Porifera, demospongiae)
 
Creator Singh, A.
Thakur, N.L.
 
Subject AQUATIC COMMUNITIES::Other aquatic community studies
INVERTEBRATE BIOLOGY::General
INVERTEBRATE BIOLOGY::Reproduction and development
INVERTEBRATE BIOLOGY::Sponges::Reproduction and development
 
Description Availability of suitable substratum is often a limiting factor for sessile organisms. We studied growth and regeneration of golf ball sponge Cinachyrella cf. cavernosa with and without its aggressive neighbour, soft coral (Zoanthus sansibaricus) in rocky intertidal area of Anjuna (Goa), India to understand impact of spatial competition on these life-history processes. Specific growth rate of C. cf. cavernosa ranged from 3.38 ? 0.47 to 24.57 ? 1.99% year-1. A wound-healing experiment demonstrated 50?100 times faster regeneration, compared to their average growth rate. Both growth and regeneration decreased as sponge size increased. The sponges exhibited 36?69% higher growth and 30?76% faster regeneration rate in the absence of the competitor species, Z. sansibaricus. The protein synthesis ability (RNA to DNA ratio), which is an index for physiological activity was adversely affected by sponge size and competitor abundance. Results suggest that in a space-limited region, the presence of an aggressive neighbour acts as one of the crucial factors affecting the primary functions (such as growth and regeneration) of the sponge. This study also highlights the remarkable regenerative ability of the slow growing sponge C. cf. cavernosa which aids in maintaining its abundance under stressful conditions of rocky intertidal region
 
Date 2016-03-08T11:32:08Z
2016-03-08T11:32:08Z
2016
 
Type Journal Article
 
Identifier Hydrobiologia, vol.768(1); 2016; 111-123
yes
http://drs.nio.org/drs/handle/2264/4916
 
Language en
 
Relation Hydrobiologia_768_111.jpg
 
Rights An edited version of this paper was published by Springer. This paper is for R & D purpose and Copyright [2016] Springer
 
Publisher Springer