Blood Properties of Pre- and Postspawning Shad, Blueback Herring, and Menhaden
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Authors
Blake, Mark M.
Issue Date
1981-12-03
Type
Thesis
Language
en_US
Keywords
Blood , Blueback herring , Menhaden , Shad , Spawning
Alternative Title
Abstract
The hematocrit (%), total serum protein (g 100 ml-1), and serum chloride (mg 100 ml-1 ) concentration of blood samples taken from pre- and postspawning shad, Alosa sapidissima; blueback herring, Alosa aestivalis; and menhaden, Brevoortia tyrannus were determined. Serum protein levels were greater for prespawners than for postspawners of each species. Prespawning shad exhibited a greater serum chloride concentration than postspawning shad. Prespawning male bluebacks had higher hematocrits than male postspawning bluebacks. A higher mean hematocrit of prespawning male bluebacks compared with prespawning females was the only sex difference found. Serum protein concentrations were highest for shad, intermediate for bluebacks, and lowest for menhaden. The serum chloride concentrations of shad and bluebacks were greater than those of menhaden. Shad exhibited higher hematocrits than bluebacks and menhaden. Differences in blood properties between pre- and postspawners may be attribute d to physiological stress associated with migration and spawning. Species differences may be related to differences in habits among anadromous and marine fishes during the spawning period. Positive correlations were found between condition factor and serum protein concentration, and between serum protein concentration and hematocrit.
Description
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Citation
M.M. Blake, "Blood Properties of Pre- and Postspawning Shad, Blueback Herring, and Menhaden", Thesis, School of Arts & Sciences, Univ. of Bridgeport, Bridgeport, CT, 1981.