Topic
Duskytail darter
About: Duskytail darter is a research topic. Over the lifetime, 7 publications have been published within this topic receiving 115 citations. The topic is also known as: Etheostoma percnurum.
Papers
TL;DR: Captive propagation, reintroduction, and non-invasive monitoring techniques were used for this restoration effort, and smoky madtom and duskytail darter abundances were nearly comparable to native populations in Citico Creek, Monroe County, TN.
Abstract: This project's goal was to restore populations of four rare fishes into Abrams Creek, Blount County, TN. These species, all on the US Endangered and Threatened Wildlife List, include two catfishes, the smoky madtom (Noturus bailey) and the yellowfin madtom (N. flavipinnis), the duskytail darter (Etheostoma percnurum) and the spotfin chub (Erimonax monachus). Captive propagation, reintroduction, and non-invasive monitoring techniques were used for this restoration effort, which began in 1986. By 2000, there was evidence of reproduction for all four species. As of 2003, the number of these species stocked in Abrams Creek was 3167 smoky madtoms, 1574 yellowfin madtoms, 3430 duskytail darters, and 11,367 spotfin chubs. Increasing population sizes were indicated for three of the four fishes, and smoky madtom and duskytail darter abundances were nearly comparable to native populations in Citico Creek, Monroe County, TN.
62 citations
Journal Article•
6 citations
6 citations
TL;DR: Early growth was rapid, males grew faster than females, and maximum age attained was 2 yr, and the estimated population of the 200 m study reach was 1023 duskytail darters.
Abstract: The duskytail darter, Etheostoma (Catonotus) sp., is a relict species warranting protected status. Adults and juveniles in Little River, Tennessee were most abundant in pools among cobbles and small boulders. Most males and females reached sexual maturity at 1 yr of age. Sexual dichromatism and dimorphism were conspicuous only in breeding fish. Mean clutch size was 27, and females in aquaria produced multiple clutches. Estimates of spawning frequency ranged from 5-7 clutches/yr, and fecundity from 135-189. Spawning occurred beneath slab-shaped stones from late April-June at water temperatures from 17-24 C. Females remained inverted during spawning, and males inverted for 0.5-4.0 sec at mean intervals of 3.9 min. Single-layer clusters of 23-150 eggs (mean diameter = 2.8 mm) deposited on the undersides of stones by one or more females were guarded by males until hatching (11-14 d at 18-27 C). Larvae developed prominent stellate melanophores on top of the head. Early growth was rapid, males grew faster than females, and maximum age attained was 2 yr. The estimated population of the 200 m study reach was 1023 duskytail darters. Diet consisted mainly of microcrustaceans, chironomid larvae, and heptageniid nymphs. Excessive siltation and water quality degradation threaten this population.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2009 | 1 |
| 2008 | 1 |
| 2005 | 1 |
| 2000 | 1 |
| 1991 | 2 |
| 1984 | 1 |