Study of feeding mechanism in Solen dactylus on Golshahr coast of Bandar Abbas (Persian Gulf)
This study provides the feeding mechanism of Solen dactylus in some parts of northern coast of the Persian Gulf. We collected 180 specimens of bivalves from April 2007 to March 2008 along Golshahr coast of Bandar Abbas. Biometrical factors and the kind of nutritional materials (diversity and abundance of phytoplankton in digestive system) and weight of digestive system were measured and studied in the laboratory. Gastro Somatic Index, Gonado Somatic Index and Electivity Index were determined for clam specimens. Water sampling was undertaken by three two-liter bottles in 1-2 m depth of coastal waters. Water samples were fixed and the specimens of phytoplankton were identified under a binuclear microscope. In total, 19 genera of phytoplankton consisting of 11 genera of diatoms, 6 genera of dinoflagellata, 1 genus of green algae and 1 genus of blue-green algae were identified in the sea during one year of the study period, whereas only 6 genera of diatoms and 1 genus of dinoflagellata were observed in digestive system of clams. The clams showed a selective feeding mechanism for dinoflagellata. The maximum and minimum electivity indexes belonged to Psuedonitzchia sp. (0.84) and Ceratium sp. (0.48), respectively. Gonado Somatic Index and Gastro Somatic Index during the study period showed a negative correlation (P less than or equal to 0.01). The maximum and minimum phytoplankton frequencies in digestive system of specimens were observed in April 2007 and March 2008, respectively. There was a significant relationship between sea surface temperature and dissolved oxygen and Gastro Somatic Index (P less than or equal to 0.01).
| Main Authors: | , |
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| Format: | Journal Contribution biblioteca |
| Language: | Persian |
| Published: |
2010
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| Subjects: | Water sampling, Phytoplankton, Dissolved oxygen, Digestive system, Cyanobacteria, Solen dactylus, Ceratium, Bacillariophyceae, Solen, Feeding, Abundance, Aquatic plants, Biometrics, Nutrition, Gonadosomatic index, Feeding behaviour, Selective feeding, Taxonomy, Biological sampling, New species, Marine, |
| Online Access: | http://hdl.handle.net/1834/11695 |
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