Bibliography: p. [i.e. leaves] 165-215.

Thesis (M. Sc.)--University of Adelaide, 1989? / Includes bibliographical references (p. [i.e. leaves ] 165-215).

This study was conducted to compare the gizzard integrity between two broilers flocks, one under a no antibiotics ever (NAE) program and the other from a conventionally raised flock (CONV). One-hundred Ross 708 x Ross YPM broiler chickens from two flocks of the same company but raised under two distinct management systems were allocated for this study. At 1, 14, 28 and 42 days of age, birds from both flocks were received at the Poultry Research and Diagnostic Laboratory. Gross and histopathologic evaluations of gizzard lesions and microbiological determinations of the gizzard mucosa were conducted and body and gizzard weights were recorded. Birds under both programs showed very similar growth rates, however gizzards were heavier in the birds under the CONV program. The birds under the NAE program had higher gross gizzard lesion scores at days 1, 14, 28 and 42, with statistical significance at day 42 (P<0.05). Histopathologically, the birds under the NAE program had greater gizzard lesion scores compared to the CONV flock at days 14 and 28, however no statistical significance was established. Escherichia coli was more frequently isolated from the birds under the CONV program. According to these observations, gross and microscopic gizzard lesions appeared to be more associated with the NAE program.

Thesis (M.A.)--Humboldt State University, 2007. / Includes bibliographical references (leaves 68-77). Also available via Humboldt Digital Scholar.

Thesis (M.S.)--Auburn University, 2008. / Abstract. Includes bibliographical references (p. 43-52).

Thesis (Ph. D.)--University of Michigan, 1939. / "Reprinted from the American midland naturalist, vol. 22, no. 2 ... September, 1939." Bibliography: p. 404-405.

Thesis (Ph. D.)--University of Michigan, 1939. / "Reprinted from the American midland naturalist, vol. 22, no. 2 ... September, 1939." Bibliography: p. 404-405.

Thesis (M.S.)--University of Nebraska--Kearney, 2009. / "December 2009". Includes bibliographical references. Also available in PDF via the World Wide Web.

Thesis (M.S.)--University of Wisconsin--Madison, 1981. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 84-97).

Anglers unlawfully introduced gizzard shad Dorosoma cepedianum into Claytor Lake, Virginia in the late 1980s, apparently with the intention of improving the sportfishery by adding an additional clupeid prey resource. This study examined the trophic interactions between larval shad and resident zooplanktivorous fishes, in an attempt to discover the potential for trophic competition and negative impacts to these fish species. Ichthyoplankton sampling in 1997 and 1998 showed that peak abundances of larval shad overlapped temporally and spatially with both larval Lepomis spp. and larval alewife Alosa pseudoharengus. Peak larval shad density (0.04-0.06 fish/m3) was two to three orders of magnitude less than that reported from other reservoir systems, slightly less than that of larval alewife in Claytor Lake (0.05-0.07 fish/m3), and significantly less than that of larval Lepomis spp. in Claytor Lake (0.28-0.51 fish/m3). Diet overlap values indicated potential resource overlap among all three larval taxa. Diet of larval shad did not overlap with that of either age-0 Micropterus spp. or adult alewife. All species of limnetic larvae examined showed feeding preferences for Diaphanosoma and copepod nauplii. Crustacean zooplankton densities did not respond negatively to peak larval fish abundances, and never dropped below 250-400 organisms/L. In Claytor Lake, the impact of trophic competition with larval gizzard shad on other zooplanktivores currently appears to be minimized by low densities of larval shad and abundant crustacean zooplankton. / Master of Science