File:American malacological bulletin (1988) (18130246636).jpg

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Title: American malacological bulletin
Identifier: americanmal6719881990amer (find matches)
Year: 1983 (1980s)
Authors: American Malacological Union
Subjects: Mollusks; Mollusks
Publisher: (Hattiesburg, Miss. ?) : (American Malacological Union)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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0 200 400 600 800 1000 Size (pm) Fig. 22. Trevor Channel Site. Size frequency distribution of Pulsellum salishorum buccal contents.
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o. 23 300 600 900 SIZE (pm) 1200 1500 Fig. 23. Trevor Channel Site. Size frequency distribution of sediment and buccal content foraminiferans. Buccal content foraminiferans are pooled over all scaphopods. The mean + 1 mean standard devia- tion for the sediment foraminiferan distribution = 368 ± 177 ^m; for the buccal foraminiferan distribution = 163 ± 106/*m. The computed t statistic for the difference in the means: t = -41.419; P = 1.010 x 10-7, highly significant; a = 0.05. of either Cadulus aberrans or Pulsellum salishorum. Never- theless, at least occasionally, a few relatively mobile prey were caught. These included ostracods, a barnacle cyprid, a mite, and several kinorhynchs. Their susceptibility to predation could be caused by properties of their cuticles or their lack of vigorous directed locomotion. PREY SPECIALIZATION BY TAXON All three species ingested items that appear to have little nutritive value. Bilyard (1974) found that Dentalium entale stimpsoni ale few empty foraminiferan tests. By calculating electivities he (Bilyard, op. cit). concluded empty tests were not desired food items. Empty foraminiferan tests and test fragments are found commonly in the sediment and in the buccal contents of all three species of scaphopods examined here. It is possible to assess selectivity of predation within the foraminiferan component of the total dietary array by com- paring proportional prey abundances. If the proportional abun- dances found in the buccal pouches approximated the pro- portional abundances for the same taxon in the native habitat, then the scaphopods were harvesting the foraminiferans as they were encountered. If the abundances in the buccal

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https://www.flickr.com/photos/internetarchivebookimages/18130246636/

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Volume
InfoField
1988
Flickr tags
InfoField
  • bookid:americanmal6719881990amer
  • bookyear:1983
  • bookdecade:1980
  • bookcentury:1900
  • bookauthor:American_Malacological_Union
  • booksubject:Mollusks
  • bookpublisher:_Hattiesburg_Miss_American_Malacological_Union_
  • bookcontributor:Smithsonian_Libraries
  • booksponsor:Biodiversity_Heritage_Library
  • bookleafnumber:494
  • bookcollection:biodiversity
  • BHL Collection
  • BHL Consortium
Flickr posted date
InfoField
27 May 2015

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Public domain
This work is in the public domain because it was published in the United States between 1978 and March 1, 1989 without a copyright notice, and its copyright was not subsequently registered with the U.S. Copyright Office within 5 years. Unless its author has been dead for several years, it is copyrighted in the countries or areas that do not apply the rule of the shorter term for US works, such as Canada (50 pma), Mainland China (50 pma, not Hong Kong or Macau), Germany (70 pma), Mexico (100 pma), Switzerland (70 pma), and other countries with individual treaties. See this page for further explanation.

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