Populations of Missouri saddled darters in the Niangua River and the Pomme de Terre River of SW Missouri were compared with respect to age and growth, reproductive cycles and fecundity Females typically contained maturing clutches of 40-50 ova and spawned periodically from mid-March to July Reproductive activity was interrupted in late April when heavy rains produced high stream flows. Darters in the smaller Pomme de Terre River were larger at a given age and in better condition than those in the Niangua River. The number of maturing ova present in females of both rivers was very similar. Maximum longevity for both sexes was 4 years with sexual maturity attained at 1 year in females and after 2 years in males. The length of the spawning period and the production of many small clutches of eggs enhance the reproductive success of this species in an unpredictably fluctuating riffle habitat.
The American Midland Naturalist has been published for 90 years by the University of Notre Dame. The connotations of Midland and Naturalist have broadened and its geographic coverage now includes North America with occasional articles from other continents. The old image of naturalist has changed and the journal publishes what Charles Elton aptly termed "scientific natural history" including field and experimental biology. Its significance and breadth of coverage are evident in that the American Midland Naturalist is among the most frequently cited journals in publications on ecology, mammalogy, herpetology, ornithology, ichthyology, parasitology, aquatic and invertebrate biology and other biological disciplines.
Simultaneously an international center for Catholic thought, a teaching-focused liberal arts college, and a dynamic hub for research and scholarship, the College of Arts and Letters at the University of Notre Dame provides its students with an education that fuels their passion for learning while preparing them to make a difference in the world. The largest and oldest college in the university, Arts and Letters houses the divisions of the arts, humanities, and social sciences. It encompasses 21 departments, more than 40 undergraduate and graduate degree programs, and a variety of interdisciplinary centers. Approximately 2,500 undergraduates and 750 graduate students pursue degrees through Arts and Letters programs; students from throughout Notre Dame enroll in thought-provoking Arts and Letters courses.
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The American Midland Naturalist
© 1983 The University of Notre Dame