The effects of threadfin shad, Dorosoma petenense on Diaptomus in Piedmont North Carolina lakes
- UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
- Richard Allen Beavers (Creator)
- Institution
- The University of North Carolina at Greensboro (UNCG )
- Web Site: http://library.uncg.edu/
- Advisor
- Robert Stavn
Abstract: Since McKee and Coker's zooplankton survey in 1940, the lakes and reservoirs of piedmont North Carolina have matured ecologically with the introduction of the size-selective vertebrate predator threadfin shad, the invertebrate predator Leptodora. and two additional Diaptomus species. Now there are four common Diaptomus species, D. birgei, D. reighardi, D. pallidus, and D. mississippiensis, and several species are commonly found coexisting in the same lake. The life cycle and feeding habits of the threadfin shad are such that they feed heavily on zooplankton in the summer and fall. During the winter and spring threadfin shad's feeding is diminished due to the cold waters which often kill it or at least strongly curtail its feeding activity. Zooplankton collections were taken every six weeks for a year from eleven lakes of the three major river drainages in piedmont North Carolina: the Catawba, Yadkin, and Haw-Cape Fear. Samples were taken from deep (>10 m), intermediate (7m), shallow (3.5 m), and occasionally very shallow (1 m) stations in each lake. Adult diaptomid copepods were separated by species and counted. The total numbers of Diaptomus and the percentages of the different Diaptomus species were determined from each area of the lake.
The effects of threadfin shad, Dorosoma petenense on Diaptomus in Piedmont North Carolina lakes
PDF (Portable Document Format)
6330 KB
Created on 1/1/1975
Views: 176
Additional Information
- Publication
- Thesis
- Language: English
- Date: 1975
- Subjects
- Lakes $z North Carolina $z Piedmont (U.S. : Region)
- Lake ecology $z North Carolina $z Piedmont (U.S. : Region)
- Shad $x Life cycles