Natural variation of toxicity in encrusting sponge Crambe crambe (Schmidt) in relation to size and environment

被引:46
作者
Becerro, MA
Turon, X
Uriz, MJ
机构
[1] CSIC, CTR ADV STUDIES, E-17300 BLANES, GIRONA, SPAIN
[2] UNIV BARCELONA, FAC BIOL, DEPT ANIM BIOL INVERTEBRATES, E-08028 BARCELONA, SPAIN
关键词
chemical ecology; natural toxicity; spatial variation; defensive strategy; encrusting sponges;
D O I
10.1007/BF02033853
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The presence of intraspecific variation in toxicity and its relationship with biological or ecological factors were studied in the sponge Crambe crambe. Within-specimen (periphery and central part), between-size (< 1000 mm(2) in area, between 1000 and 10,000 mm(2) and > 10,000 mm(2)) and between-habitat (well-illuminated and dark communities) variations in toxicity were evaluated by the Microtox bioassay. Quantitative differences were detected that were not attributable to within-specimen variation but to size and habitat effects. Habitat comparisons showed that sponges in the shaded habitat were significantly more toxic than those of the well-illuminated community. Sponges of the smaller size classes displayed significantly less toxicity than the medium-sized specimens. Results are interpreted under the optimal defense theory and their ecological implications are considered.
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页码:1931 / 1946
页数:16
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