File:American malacological bulletin (1987) (17536062933).jpg

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Title: American malacological bulletin
Identifier: americanmal4519861987amer (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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272 AMER. MALAC. BULL. 5(2) (1987) 1Cr>
Text Appearing After Image:
% ASH Fig. 21. Relationship of biomass ratio (dry weight of slugs/algal ash-free dry weight) and algal ash level for Caribbean ascoglossan popula- tions: Logio (biomass ratio) = -.01256 (°/o Ash) - 1.8649, with r = .561; the relationship is significant (p<.05) with 13 d.f. ponents (e.g. Marsh, 1973). There are distinct differences in the composition, population density, and diversity of Caribbean ascoglossan communities. Because ascoglossans are highly stenotrophic, the habitat is defined primarily by the algae present, which presumably vary with such environmental factors as type of substratum and nutrient availability. Ascoglossans, however, seem to be more sensitive to some environmental parameters than are their host algae, because the same algal species can occur in different communities with different asco- glossans predators (though the reverse is seldom true), and suitable foods often occur without ascoglossan predators. There are also substantial within- and between-habitat popula- tion differences (density and biomass ratios) of ascoglossan species on the same algal species. Climatic effects also con- tribute to faunal differences, as shown in comparison of the Caulerpa racemosa communities at different latitudes. Thus, ascoglossan populations potentially serve as sensitive en- vironmental indicators. Factors that affect ascoglossan populations can best be defined via analysis of quantitative population differences and covariant environmental variables. In this study, two

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Volume
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5
Flickr tags
InfoField
  • bookid:americanmal4519861987amer
  • 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:548
  • bookcollection:biodiversity
  • BHL Collection
  • BHL Consortium
Flickr posted date
InfoField
27 May 2015

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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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