Pre-ingestive selection efficiency in two populations of the razor clam Tagelus dombeii with different histories of exposure to paralytic shellfish poisoning (PSP). Issue 4 (3rd July 2016)

• Record Type: Journal Article
• Authors: Villanueva, Paola A.; Navarro, Jorge M.
• Is Part Of: Marine and freshwater behaviour and physiology. Volume 49:Issue 4(2016)
• Page Start: 291
• Page End: 300
• Publication Date: 2016-07-03
• Subjects: Tagelus dombeii -- Alexandrium catenella -- feeding -- pre-ingestive selection efficiency -- paralytic shellfish poisoning (PSP); Marine animals -- Physiology -- Periodicals; Marine animals -- Behavior -- Periodicals; Freshwater animals -- Physiology -- Periodicals; Freshwater animals -- Behavior -- Periodicals; Marine biology -- Periodicals; Aquatic animals -- Periodicals; 591.77
• DOI: 10.1080/10236244.2016.1193952
• Languages: English
• ISSNs: 1023-6244

Abstract

Abstract: We studied toxic effects of the dinoflagellate Alexandrium catenella on filtration activity and pre-ingestive selection efficiency in Tagelus dombeii (razor clam). Samples came from two populations with different histories of exposure to paralytic shellfish poisoning (PSP): Melinka, Aysén (with frequent exposure to PSP) and Corral, Valdivia (without previous exposure to PSP). Feeding activity of T. dombeii was affected by a diet containing A. catenella, showing a reduction in individuals from Corral, Valdivia and Melinka, Aysén. Furthermore, pre-ingestive selection efficiency was significantly higher in specimens from the population of Melinka, than those from Corral. Significantly higher values of clearance rate and pre-ingestive selection efficiency from the Melinka samples may reflect adaptation to specific environmental conditions where PSP events frequently occur.