The Iowa African-American Journal, Winter 2002/Spring 2003, Vol. 8, no. 2

Newsletter for the Iowa Commission on the Status of African-Americans

White Cane Update, Spring 1999

The White Cane Update newsletter includes information about the latest happenings at the Iowa Department for the Blind.

Orientation Center Newsletter, Spring 2002

The Orientation Center newsletter is produced three times a year, and includes articles written by students, staff, and former students. It also contains news about what is happening to other students who have been in the Center.

White Cane Update, Spring 2001

The White Cane Update newsletter includes information about the latest happenings at the Iowa Department for the Blind.

Iowa Civil Rights Commission Communicator, Spring 1997, Vol. 15, no. 1

Newsletter produced by the Iowa Civil Rights Commission

Iowa Civil Rights Commission Communicator, Spring 2002, Vol. 20, no. 1

Newsletter produced by the Iowa Civil Rights Commission

Iowa Civil Rights Commission Communicator, Spring 2003, Vol. 21, no. 1

Newsletter produced by the Iowa Civil Rights Commission

Iowa Civil Rights Commission Communicator, Spring-Summer 2001, Vol. 19, no. 1

Newsletter produced by the Iowa Civil Rights Commission

Fresh News; The Farmers' Market Newsletter, Winter-Spring 2002

Newsletter produced by Iowa Department of Agriculture and Land Stewardship

International Update Spring 2005

International Events, Education Events, and Exporting Opportunities

Iowa African-American Journal, Spring 2004, Vol. 9, no. 1

Newsletter for the Iowa Commission on the Status of African-Americans

Iowa Aviation Bulletin, Spring 2005

Quarterly newsletter published by the Iowa Department of Transportation's Office of Aviation that contains information of interest to aviation-related persons and organizations.

Iowa Railroad Ties Newsletter, Spring 2005

Quarterly newsletter prepared by the Iowa Department of Transportation's Office of Rail Transportation.

Autumnal vs spring hatching in the fairy shrimp Siphonophanes grubii (Dybowski) (Crustacea, Anostraca): diversified bet-hedging strategy ?

Polyphenisms, as opposed to polymorphism, refers to coexistence of several distinct phenotypes having a common genotype. Polyphenism can be selected for in unpredictable environments. Here we document and anlyse a case of siphenism in the north-European fairy shrinp Siphonophanes grubii (Dybowski), in relation to the temporary and unpredictable nature of its habitat. The active part of this species'life cycle usually consists of a single, short-lived, spring cohort. Here we report field observations on autumnal hatching and on a long-lived, overwintering cohort; we show that the winter cohort runs the risk of total failure, due to the pond freezing entirely or drying up during winter. If, however, environmental conditions allow winter survival, animals reach a larger size, reproduce for a longer time, and display higher fecundity, than do animals from the spring cohort. Laboratory experiments support the theory that these differences are purely phenotypic and dependent on temperatur. Using an analytical model adapted from Cohen (1966), we propose that the coexistence of both a winter and a spring cohort in the same ponds can be interpreted as a diversified bet-hedging strategy.

Responsive Management Report, Winter/Spring 2001

Newsletter produced by Iowa Department of Natural Resources.