Preprint volume - SIBM

Pre-print Volume - Posters
Topic 2: MARINE ORGANISMS AND ECOSYSTEMS AS MODEL SYSTEMS
PCO2 (17.3 % of total variation)
0.2
0.1
0
-0.1 --0.1
--0.1
--0.1
-
-0.2 --0.2
--0.2
--0.2
-
-0.3 --0.3
--0.3
--0.3
-
Trasform: Square root
Resemblance: D 16 squared distance
%
% Dictyotales
Canopy
Depth
% Cystoseira sp.
Inclination
% Sand
Crevice/Hole
% Jania rubens
-0.2 --0.2 --0.2 --0.2 - - -0.1 0 0.1 0.2 0.3
PCO1 (23.9 % of total variation)
Fig. 1 - Results of Principal Coordinate Analysis, distribution pattern of nests and variables.
Risultati della PCO, modello di distribuzione dei nidi e delle variabili.
Conclusions - The results of this study indicate that the presence of Dictyotales and
high canopy algal forms are elective requirements for the choice of nesting site in S.
ocellatus. The other variables seem not to have a significant role maybe because the
samplings is not sufficient to explain a preference. This first analysis shows that the
algal species at high canopy may provide protection to the nest. Further investigations
will determine if this protection is related to a lower visibility of the nest by predators
or if these erect algae have a role in the mitigation of wave-motion.
Acknowledgements - We thank Dr. Andrea Catalano for helpful comments on this manuscript.
References
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An Evolutionary Perspective on Behaviour. Oxford University Press.
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dusky grouper (Epinephelus marginatus) by visual sampling. Mar. Biol., 140: 175–185.
LETOURNEUR Y., RUITTON S., SARTORETTO S. (2003) - Environmental and benthic habitat
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