A molecular phylogeny of the bivalve mollusks
نویسندگان
چکیده
منابع مشابه
A molecular phylogeny of the bivalve mollusks.
A phylogenetic reconstruction based on 506 nucleotides near the 5' end of the 18S subunit of ribosomal DNA (rDNA) in 2 gastropod, 3 chiton and 28 bivalve mollusks supported the monophyly and sister group relationship of the subclasses Heterodonta and Palaeoheterodonta but could not confidently establish either the monophyly or the phylogenetic relationships of the morphologically well defined s...
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BACKGROUND Bivalves are very ancient and successful conchiferan mollusks (both in terms of species number and geographical distribution). Despite their importance in marine biota, their deep phylogenetic relationships were scarcely investigated from a molecular perspective, whereas much valuable work has been done on taxonomy, as well as phylogeny, of lower taxa. METHODOLOGY/PRINCIPAL FINDING...
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In this lesson, students will acquire skills in using an ocular micrometer to measure the length of bivalve larvae, monitor the density of larvae in their culture system, and understand production protocols used in bivalve hatcheries. This activity will take a period from each class over approximately a two-week period – the time for larvae to develop from egg to metamorphosis (setting). One or...
متن کاملSpawning & Rearing Bivalve Mollusks:
In this lesson, students will learn methods for spawning bivalve mollusks (e.g. clams or oysters) using thermal induction. Students will acquire skills in using an ocular micrometer to measure the diameter of bivalve eggs and the length of bivalve larvae. The following lesson plan will have students monitoring the density of larvae in their culture system and understanding production protocols ...
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A collection of proliferative disorders in mollusks has been assembled over a period of years through pathologic studies of epizootic neoplastic disease (Christensen. Farley. and Kern. 1974; Farley. 1969b; Farley and Sparks. 1970) and routine histologic studies from many locations (Farley. 1968. 1969b; Farley and Sparks. 1970). Diagnosis and characterization of the neoplastic diseases in mollus...
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ژورنال
عنوان ژورنال: Molecular Biology and Evolution
سال: 1997
ISSN: 0737-4038,1537-1719
DOI: 10.1093/oxfordjournals.molbev.a025801