9,342 research outputs found
Pond Construction at the Horticulture Station
Work began on the research ponds at the Horticulture Station in the second week of October (2003) and was completed in May 2004. The project consisted of constructing 6, 0.2 acre research ponds, an access road, wetland, well, and a staging area. The Iowa State University Aquatic Research Facility has a total of 1.2 surface acres of water. The total project area covers 3.58 acres; approximately 20,000 cubic yards of dirt will be moved and reshaped for pond construction
Pond Culture of Channel Catfish in the North Central Region
The channel catfish, Ictalurus punctatus, is the principal warm water species grown in the southeastern United States. In 1991 there were 390 million lb. of channel catfish (live weight) produced in this country, with the majority produced in Mississippi. The price of channel catfish decreased in 1991 compared to 1990 when the production was 30 million lb. less. In December 1991 the price of channel catfish delivered to processing plants was 0.72/lb. in December 1990 (live weight). In wholesale terms, dressed whole fish were 1.61/lb. in 1990 for the same time period. At the 1991 prices many of the aquaculturists were either losing money or just breaking even. However, both prices and production increased by December 1992. For fish delivered to processing plants, the price increased to $0.63/lb. with 457 million lb. processed (live weight)
Managing Iowa Fisheries: Is Fish Farming for You?
Fish farming, or aquaculture, has attracted the attention of farmers, landowners, and investors as an alternative agriculture enterprise in Iowa. If you are considering fish farming, this checklist may help you determine whether it’s feasible.https://lib.dr.iastate.edu/extension_ag_pubs/1128/thumbnail.jp
High performance deep packet inspection on multi-core platform
Deep packet inspection (DPI) provides the ability to perform quality of service (QoS) and Intrusion Detection on network packets. But since the explosive growth of Internet, performance and scalability issues have been raised due to the gap between network and end-system speeds. This article describles how a desirable DPI system with multi-gigabits throughput and good scalability should be like by exploiting parallelism on network interface card, network stack and user applications. Connection-based parallelism, affinity-based scheduling and lock-free data structure are the main technologies introduced to alleviate the performance and scalability issues. A common DPI application L7-Filter is used as an example to illustrate the applicaiton level parallelism
Managing Iowa Fisheries: Cage Fish Culture
Cage culture of fish uses existing water resources but encloses the fish in a cage or basket that allows water to pass freely between the fish and the pond. Consider the advantages and disadvantages. Also read about details of site selection, cage construction, species suitable for cage culture, and more.https://lib.dr.iastate.edu/extension_ag_pubs/1123/thumbnail.jp
A White Paper on the status and needs of aquaculture extension outreach for the North Central Region
The North Central Regional Aquaculture Center (NCRAC) is one of five Regional Aquaculture Centers administered by the U.S. Department of Agriculture\u27s Cooperative State Research, Education, and Extension Service (USDA CSREES). These Centers work together within the broader, integrated research/extension aquaculture program of USDA to advance a well developed and sustainable aquaculture industry in the United States. NCRAC relies on leaders in the diverse aquaculture industry for guidance and direction in its programs. An Industry Advisory Council (IAC) identifies program priorities. A Technical Committee (TC) works with the IAC to formulate projects that address industry priorities. Regional programs are coordinated with activities of other Centers to avoid duplication, yet still address regional differences. Teams of researchers and extension aquaculture specialists from North Central Region (NCR) universities, public agencies, and the private sector develop and execute projects to solve priority problems. A Board of Directors oversees administration and management of NCRAC\u27s activities
Effects of Formulated Feed on water Quality in Fingerling Waleye Production Ponds
Six 0.04-ha plastic-lined ponds were used at the Iowa Department of Natural Resources’ Rathbun Fish Culture and Research Facility to evaluate the use of supplemental fish food on walleye (Sander vitreus) fingerling growth and survival, and on the benthic invertebrate community. Walleye were stocked 3-4 days post hatch on 2 May 2003, and harvested 5-6 June 2003. Organic fertilizer (alfalfa pellets, 112kg/ha/week) was used to increase primary production and inorganic fertilizers were added periodically to maintain a target nutrient ratio of 7:1 nitratenitrogen to total phosphorus (NO3-N: TP). Additional nutrients in the form of Lansy CW fish feed were added to three of the six ponds. The objective of this project was to determine the effect of a commercial fish diet on water quality. At the end of the culture season, there were significant differences between water chemistry parameters in the ponds; the feed treatments had higher levels of nitrogenous compounds and total phosphorus
Plankton Management for Fish Culture Ponds
In the culture of larval fish of various species, e.g., walleye (Stizostedion vitreum), hybrid striped bass (Morone saxatilis X M. chrysops) and sunfish (Lepomis spp.), management of the zooplankton forage base is critical to successful transition of larvae to the fingerling stage. In addition, information regarding the relative status of plankton (zooplankton and phytoplankton) communities gives insight into water quality parameters and the possible success or failure of the culture season. The dynamic characteristics of zooplankton populations have led researchers to use particular fertilization techniques and speciesspecific zooplankton inoculations in culture ponds (Colura and Matlock 1983; Geiger 1983a; Farquhar 1984; Turner 1984; Geiger et al. 1985). The intent of these management techniques was to maintain high densities of desirable zooplankton species in culture ponds until fish were harvested or able to consume commercial feeds
- …