Two species of Crustacea (Decapoda) associated with the fan mussel, pinna nobilis Linnaeus, 1758 (Mollusca, Bivalvia).
In: Crustaceana, Jg. 81 (2008-04-01), Heft 4, S. 433-446
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Zugriff:
During a study on the ecology and biology of the fan mussel, Pinna nobilis along the northern and eastern coasts of Tunisia, the presence of the shrimp, Pontonia pinnophylax and the crab, Nepinnotheres pinnotheres (Decapoda) associated with this bivalve, was recorded. The shrimp was collected only in the lagoon of Bizerte, whereas the crab was found exclusively at Stah Jaber (close to the fishing port of Monastir). P. nobilis was occupied by Pontonia pinnophylax in 23.3% of the samples and the associated shrimp population was dominated by males (63.6%). Shrimp couples were generally encountered inside the large pinnids, and the size of the shrimps increased with that of the host. P. nobilis was occupied by Nepinnotheres pinnotheres in 56.7% of the cases. The highest numbers of crabs were recorded in the oldest pinnids. The sex-ratio of the associated crab population was male-biased, 62.5% of the population being males. A morphological study of the two associated species revealed some features worth noting. In the female shrimp, distinguished by the right chela in the second pair of pereiopods being definitely larger than the left, the length of this appendage (both right and left) increased with individual size, but these two variables were found independent in the male shrimp. Concerning Nepinnotheres pinnotheres, the length of the two chelae of the first pair of pereiopods increased with that of the animal's body in both sexes. [ABSTRACT FROM AUTHOR]
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Titel: |
Two species of Crustacea (Decapoda) associated with the fan mussel, pinna nobilis Linnaeus, 1758 (Mollusca, Bivalvia).
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Autor/in / Beteiligte Person: | Rabaoui, Lotfi ; Zouari, Sabiha Tlig ; Ben Hassine, Oum Kalthoum |
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Zeitschrift: | Crustaceana, Jg. 81 (2008-04-01), Heft 4, S. 433-446 |
Veröffentlichung: | 2008 |
Medientyp: | academicJournal |
ISSN: | 0011-216X (print) |
DOI: | 10.1163/156854008783797507 |
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