Laboratory determination of a phosphorus leaching rate from trout (Onchorhynchus mykiss) feces

Dennis McIntosh, Erin Ryder, Gary Dickenson, Kevin Fitzsimmons

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In order to reduce the impact that trout farm effluent can have on receiving water, it imperative to reduce the overall phosphorus (P) loading of these effluents. In response, the United States Environmental Protection Agency (US EPA) is issuing new effluent regulations for aquaculture. Therefore, efficient removal of P from effluent water is becoming increasingly important. The goal of this project was to determine the leaching rate of total and reactive P from trout feces under different water temperatures and water velocities immediately after evacuation. Scatter plots of the P load in the experimental containers over time were created for each fish/fecal sample and regression analysis was used to determine P leaching rates. Results from this study suggest that reactive phosphorus leaching rates are not affected by water velocities between 0.027 and 0.134 m/sec. However, at higher temperatures, reactive P leaches 1.92-mg PO4/hr per g feces faster (F1.52 = 4.6445, P = 0.0358) than at lower temperatures. Mean reactive phosphorus leaching rates were 2.88 ± 0.704 and 0.96 ± 0.581mg PO4/hr/g feces, for the high and low temperatures, respectively. On the other hand, total P does not appear to be affected by either water velocity or temperature. Mean total P leaching rate is 4.50 ± 1.053 mg PO4/hr per g feces. This study suggests that removal time of feces from the system is critical in reducing the overall P load in effluent.

Original languageEnglish (US)
Pages (from-to)506-512
Number of pages7
JournalJournal of the World Aquaculture Society
Volume35
Issue number4
StatePublished - Dec 2004

Fingerprint

feces
trout
effluents
Oncorhynchus mykiss
leaching
effluent
phosphorus
water
temperature
United States Environmental Protection Agency
aquaculture
containers
regression analysis
water temperature
rate
laboratory
farm
farms
fish
sampling

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Laboratory determination of a phosphorus leaching rate from trout (Onchorhynchus mykiss) feces. / McIntosh, Dennis; Ryder, Erin; Dickenson, Gary; Fitzsimmons, Kevin.

In: Journal of the World Aquaculture Society, Vol. 35, No. 4, 12.2004, p. 506-512.

Research output: Contribution to journalArticle

@article{731c02fdb3e8435cb53b027e4b4bb35c,
title = "Laboratory determination of a phosphorus leaching rate from trout (Onchorhynchus mykiss) feces",
abstract = "In order to reduce the impact that trout farm effluent can have on receiving water, it imperative to reduce the overall phosphorus (P) loading of these effluents. In response, the United States Environmental Protection Agency (US EPA) is issuing new effluent regulations for aquaculture. Therefore, efficient removal of P from effluent water is becoming increasingly important. The goal of this project was to determine the leaching rate of total and reactive P from trout feces under different water temperatures and water velocities immediately after evacuation. Scatter plots of the P load in the experimental containers over time were created for each fish/fecal sample and regression analysis was used to determine P leaching rates. Results from this study suggest that reactive phosphorus leaching rates are not affected by water velocities between 0.027 and 0.134 m/sec. However, at higher temperatures, reactive P leaches 1.92-mg PO4/hr per g feces faster (F1.52 = 4.6445, P = 0.0358) than at lower temperatures. Mean reactive phosphorus leaching rates were 2.88 ± 0.704 and 0.96 ± 0.581mg PO4/hr/g feces, for the high and low temperatures, respectively. On the other hand, total P does not appear to be affected by either water velocity or temperature. Mean total P leaching rate is 4.50 ± 1.053 mg PO4/hr per g feces. This study suggests that removal time of feces from the system is critical in reducing the overall P load in effluent.",
author = "Dennis McIntosh and Erin Ryder and Gary Dickenson and Kevin Fitzsimmons",
year = "2004",
month = "12",
language = "English (US)",
volume = "35",
pages = "506--512",
journal = "Journal of the World Aquaculture Society",
issn = "0893-8849",
publisher = "Wiley-Blackwell",
number = "4",

}

TY - JOUR

T1 - Laboratory determination of a phosphorus leaching rate from trout (Onchorhynchus mykiss) feces

AU - McIntosh, Dennis

AU - Ryder, Erin

AU - Dickenson, Gary

AU - Fitzsimmons, Kevin

PY - 2004/12

Y1 - 2004/12

N2 - In order to reduce the impact that trout farm effluent can have on receiving water, it imperative to reduce the overall phosphorus (P) loading of these effluents. In response, the United States Environmental Protection Agency (US EPA) is issuing new effluent regulations for aquaculture. Therefore, efficient removal of P from effluent water is becoming increasingly important. The goal of this project was to determine the leaching rate of total and reactive P from trout feces under different water temperatures and water velocities immediately after evacuation. Scatter plots of the P load in the experimental containers over time were created for each fish/fecal sample and regression analysis was used to determine P leaching rates. Results from this study suggest that reactive phosphorus leaching rates are not affected by water velocities between 0.027 and 0.134 m/sec. However, at higher temperatures, reactive P leaches 1.92-mg PO4/hr per g feces faster (F1.52 = 4.6445, P = 0.0358) than at lower temperatures. Mean reactive phosphorus leaching rates were 2.88 ± 0.704 and 0.96 ± 0.581mg PO4/hr/g feces, for the high and low temperatures, respectively. On the other hand, total P does not appear to be affected by either water velocity or temperature. Mean total P leaching rate is 4.50 ± 1.053 mg PO4/hr per g feces. This study suggests that removal time of feces from the system is critical in reducing the overall P load in effluent.

AB - In order to reduce the impact that trout farm effluent can have on receiving water, it imperative to reduce the overall phosphorus (P) loading of these effluents. In response, the United States Environmental Protection Agency (US EPA) is issuing new effluent regulations for aquaculture. Therefore, efficient removal of P from effluent water is becoming increasingly important. The goal of this project was to determine the leaching rate of total and reactive P from trout feces under different water temperatures and water velocities immediately after evacuation. Scatter plots of the P load in the experimental containers over time were created for each fish/fecal sample and regression analysis was used to determine P leaching rates. Results from this study suggest that reactive phosphorus leaching rates are not affected by water velocities between 0.027 and 0.134 m/sec. However, at higher temperatures, reactive P leaches 1.92-mg PO4/hr per g feces faster (F1.52 = 4.6445, P = 0.0358) than at lower temperatures. Mean reactive phosphorus leaching rates were 2.88 ± 0.704 and 0.96 ± 0.581mg PO4/hr/g feces, for the high and low temperatures, respectively. On the other hand, total P does not appear to be affected by either water velocity or temperature. Mean total P leaching rate is 4.50 ± 1.053 mg PO4/hr per g feces. This study suggests that removal time of feces from the system is critical in reducing the overall P load in effluent.

UR - http://www.scopus.com/inward/record.url?scp=12844254418&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=12844254418&partnerID=8YFLogxK

M3 - Article

VL - 35

SP - 506

EP - 512

JO - Journal of the World Aquaculture Society

JF - Journal of the World Aquaculture Society

SN - 0893-8849

IS - 4

ER -