• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 3
  • Tagged with
  • 3
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Responses of Fishes to a Low pH Environment

Prete, Philip J. (Philip John) 08 1900 (has links)
Data were collected from natural and introduced fishes present in Ferndale Lake, a small (120 ha) sport fishing reservoir in Camp County, east Texas. Levels of pH measured in the lake during the study period ranged from 3.5 to 5.3. Monthly field surveys and experimental manipulations were designed to evaluate quantitatively the signs of stress at various biological levels. Lethal limits to low pH were quantified for largemouth bass (Micropterus salmoides) and bluegill (Lepomis macrochirus) to be pH 3.8 and 4.0,respectively. Mean blood pH (+ 1 SD) of 59 bluegill was 7.41 (j 0.16), with no significant difference (P-0.05) among groups from Ferndale Lake and Moss Lake (Cooke Co., Texas) under experimental conditions, even when severe stress was externally apparent. In a dual-trough horizontal pH gradient, bluegill behavioral avoidance was observed at pH levels below 7.0. Individual testing of 40 bluegill in pH gradient of 5.2 to 7.6 resulted in median occupation of pH 7.1,with an interquartile range of pH 6.9 to 7.3. Decreased community structure and population "well being" compared to early studies cannot be attributed entirely to recent acidic condition. Separating potential stress due to lake conditions from that due to heavy biotic predation by sport fishing in a small reservoir is difficult.
2

Lummi stories from high school: an ethnohistory of the fishing wars of the 1970s

Märker, Michael 11 1900 (has links)
This study focuses on the stories and experiences of Lummi students and their teachers at Ferndale High School from 1970 to 1980. The conditions of schooling for Lummis were affected by the climate of anti-Indian hostility which was fueled by the attitudes about Native fishing rights. This conflict, referred to as the "fishing wars," culminated in the landmark 1974 Boldt Decision. Throughout the 1970s the school was a site where the cultural and political conflicts of the community were played out. This study examines the ways that Lummi students saw the school and the choices they made for survival and resistance in a complex and adverse environment. It is also a study of the teachers who were at Ferndale during the 70s and how they conducted themselves in an explosive crosscultural educational setting. Utilizing an ethnohistorical perspective, this study brings forth the stories of both Lummi students and non- Native teachers and sets them within the context of the culture-conflict climate of Whatcom County in the 1970s. This study shows how political issues were inextricably welded to cultural issues for Indian students in the 1970s.
3

Lummi stories from high school: an ethnohistory of the fishing wars of the 1970s

Märker, Michael 11 1900 (has links)
This study focuses on the stories and experiences of Lummi students and their teachers at Ferndale High School from 1970 to 1980. The conditions of schooling for Lummis were affected by the climate of anti-Indian hostility which was fueled by the attitudes about Native fishing rights. This conflict, referred to as the "fishing wars," culminated in the landmark 1974 Boldt Decision. Throughout the 1970s the school was a site where the cultural and political conflicts of the community were played out. This study examines the ways that Lummi students saw the school and the choices they made for survival and resistance in a complex and adverse environment. It is also a study of the teachers who were at Ferndale during the 70s and how they conducted themselves in an explosive crosscultural educational setting. Utilizing an ethnohistorical perspective, this study brings forth the stories of both Lummi students and non- Native teachers and sets them within the context of the culture-conflict climate of Whatcom County in the 1970s. This study shows how political issues were inextricably welded to cultural issues for Indian students in the 1970s. / Education, Faculty of / Educational Studies (EDST), Department of / Graduate

Page generated in 0.0517 seconds