Pub Date : 1997-01-01DOI: 10.1577/1548-8640(1997)059<0020:CCPWCA>2.3.CO;2
J. Terhune, T. Schwedler, W. English, J. A. Collier
Abstract A production strategy for channel catfish Ictalurus punctatus that helps increase pond production, keeps size-classes of fish in discrete groups, and provides multiple harvest dates throughout the year was developed and tested. Fingerling catfish were graded into three different size-groups and stocked into 0.04-ha ponds at a density of 900 fish/pond (450 fish stocked loose in the pond and 450 fish stocked in a 1.25-m3 cage). The caged fish were either harvested for the whole-fish market (weight, 90–330 g) or transferred into vacated ponds when the daily feeding rate of the total pond (open pond and cage) reached 112 kg/ha. The remaining fish were fed until the daily feeding rate again reached 112 kg/ha; the fish in the open pond were then harvested for the fillet market (510–850 g). As a result of the combination stocking (fish stocked both loose in a pond and in a cage within the same pond) and the separation of size-cohorts, fish were harvested six times over an approximately 14-month period. ...
{"title":"CHANNEL CATFISH PRODUCTION WITH COMBINATION AND REPLACEMENT STOCKING","authors":"J. Terhune, T. Schwedler, W. English, J. A. Collier","doi":"10.1577/1548-8640(1997)059<0020:CCPWCA>2.3.CO;2","DOIUrl":"https://doi.org/10.1577/1548-8640(1997)059<0020:CCPWCA>2.3.CO;2","url":null,"abstract":"Abstract A production strategy for channel catfish Ictalurus punctatus that helps increase pond production, keeps size-classes of fish in discrete groups, and provides multiple harvest dates throughout the year was developed and tested. Fingerling catfish were graded into three different size-groups and stocked into 0.04-ha ponds at a density of 900 fish/pond (450 fish stocked loose in the pond and 450 fish stocked in a 1.25-m3 cage). The caged fish were either harvested for the whole-fish market (weight, 90–330 g) or transferred into vacated ponds when the daily feeding rate of the total pond (open pond and cage) reached 112 kg/ha. The remaining fish were fed until the daily feeding rate again reached 112 kg/ha; the fish in the open pond were then harvested for the fillet market (510–850 g). As a result of the combination stocking (fish stocked both loose in a pond and in a cage within the same pond) and the separation of size-cohorts, fish were harvested six times over an approximately 14-month period. ...","PeriodicalId":22850,"journal":{"name":"The Progressive Fish-culturist","volume":"9 1","pages":"20-24"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88959647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1577/1548-8640(1997)059<0047:SACLOJ>2.3.CO;2
A. Linnane, I. Uglem, S. Grimsen, J. Mercer
Abstract Juvenile lobsters Homarus gamrnarus reared for stock enhancement programs are frequently packed in Styrofoam boxes between layers of wet newspaper and shellsand and transported out of water from hatcheries to release sites. A single layer of frozen newspaper acts as a cooling element. The physical disturbance experienced by individuals while being transported was simulated under controlled conditions. Juveniles were sent on “journeys” lasting 0, 6, 9, 12, 15, 18, 21, and 24 h and were physically disturbed for 15 min of each hour. Mortality was low (2–7%) within the first 12 h of simulated transport but increased significantly (12–22%) after 15 h of exposure. This increase was primarily a result of high mortality (21–45%) in individuals packed in the layer nearest the cooling element. Air temperature recordings revealed a temperature gradient between layers throughout the test period. In all, 68.5% of all observed mortality occurred within 6 h of juveniles being returned to ambient seawater. Overa...
{"title":"Survival and Cheliped Loss of Juvenile Lobsters Homarus gammarus during Simulated Out-of-Water Transport","authors":"A. Linnane, I. Uglem, S. Grimsen, J. Mercer","doi":"10.1577/1548-8640(1997)059<0047:SACLOJ>2.3.CO;2","DOIUrl":"https://doi.org/10.1577/1548-8640(1997)059<0047:SACLOJ>2.3.CO;2","url":null,"abstract":"Abstract Juvenile lobsters Homarus gamrnarus reared for stock enhancement programs are frequently packed in Styrofoam boxes between layers of wet newspaper and shellsand and transported out of water from hatcheries to release sites. A single layer of frozen newspaper acts as a cooling element. The physical disturbance experienced by individuals while being transported was simulated under controlled conditions. Juveniles were sent on “journeys” lasting 0, 6, 9, 12, 15, 18, 21, and 24 h and were physically disturbed for 15 min of each hour. Mortality was low (2–7%) within the first 12 h of simulated transport but increased significantly (12–22%) after 15 h of exposure. This increase was primarily a result of high mortality (21–45%) in individuals packed in the layer nearest the cooling element. Air temperature recordings revealed a temperature gradient between layers throughout the test period. In all, 68.5% of all observed mortality occurred within 6 h of juveniles being returned to ambient seawater. Overa...","PeriodicalId":22850,"journal":{"name":"The Progressive Fish-culturist","volume":"45 1","pages":"47-53"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89079665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1577/1548-8640(1997)059<0014:PSMFIC>2.3.CO;2
D. Peterson, R. Carline, T. Wilson, M. L. Hendricks
Abstract to date, hatchery production of fingerling walleyes Stizostedion vitreum from intensive culture systems has been limited by fry survival during the first 21 d after hatching. Recent tests of new intensive culture methods for walleye fry have shown promise, although production has been inconsistent at loading rates above 20 fry/L. The objective of this study was to test the feasibility of intensively rearing walleye fry on brine shrimp Artemia sp. at production levels with loading rates 2–3-fold greater than those in current use. After 23 d of intensive culture, our system produced more than 333,000 advanced fry (17–18 mm total length) from initial loading densities of 40 and 60 fry/L. Fry were reared on live brine shrimp in circular tanks and with equipment typically used in the hatchery production of other game fish. Fry mortality during the experiment was low, except for days 8–11, when cannibalism was prevalent. Increased feed rates and removal of cannibals were methods used to control canniba...
{"title":"Production-Scale Methods for Intensive Culture of Walleye Fry","authors":"D. Peterson, R. Carline, T. Wilson, M. L. Hendricks","doi":"10.1577/1548-8640(1997)059<0014:PSMFIC>2.3.CO;2","DOIUrl":"https://doi.org/10.1577/1548-8640(1997)059<0014:PSMFIC>2.3.CO;2","url":null,"abstract":"Abstract to date, hatchery production of fingerling walleyes Stizostedion vitreum from intensive culture systems has been limited by fry survival during the first 21 d after hatching. Recent tests of new intensive culture methods for walleye fry have shown promise, although production has been inconsistent at loading rates above 20 fry/L. The objective of this study was to test the feasibility of intensively rearing walleye fry on brine shrimp Artemia sp. at production levels with loading rates 2–3-fold greater than those in current use. After 23 d of intensive culture, our system produced more than 333,000 advanced fry (17–18 mm total length) from initial loading densities of 40 and 60 fry/L. Fry were reared on live brine shrimp in circular tanks and with equipment typically used in the hatchery production of other game fish. Fry mortality during the experiment was low, except for days 8–11, when cannibalism was prevalent. Increased feed rates and removal of cannibals were methods used to control canniba...","PeriodicalId":22850,"journal":{"name":"The Progressive Fish-culturist","volume":"1 1","pages":"14-19"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79841828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1577/1548-8640(1997)059<0036:RPOCFC>2.3.CO;2
F. Estay, N. F. Díaz, R. Neira, Ximena García
Abstract Data on reproductive traits from 1,229 mature 2-year-old female coho salmon Oncorhynchus kisutch were collected during 2 years at four salmon farms in southern Chile. Spawning periods were similar in 1993 and 1994 (39 and 41 d, respectively). The spawning period of May–June, corresponded to the full reproductive period in the northern hemisphere. The mean weight of mature females (about 4 kg) was almost double the weight reported in the northern hemisphere for 2-year-old maturing females. The pigmented eyed stage was reached approximately 270 accumulated temperature units (ATU days × °C above 0°C after fertilization. Averages for total fecundity (3,802 ± 956 eggs/female, mean ± SD; N = 1, 188), relative fecundity (986 ± 274 eggs/ kg; N = 1,170), and egg diameter (7.11 ± 0.51 mm; N = 1,185) were higher than corresponding values reported for coho salmon hatchery stocks in the northern hemisphere. Survival to the eyedegg stage averaged 74.3 ± 24.2% (N = 1,147). Correlations of female body weight wit...
{"title":"REPRODUCTIVE PERFORMANCE OF CULTURED FEMALE COHO SALMON IN CHILE","authors":"F. Estay, N. F. Díaz, R. Neira, Ximena García","doi":"10.1577/1548-8640(1997)059<0036:RPOCFC>2.3.CO;2","DOIUrl":"https://doi.org/10.1577/1548-8640(1997)059<0036:RPOCFC>2.3.CO;2","url":null,"abstract":"Abstract Data on reproductive traits from 1,229 mature 2-year-old female coho salmon Oncorhynchus kisutch were collected during 2 years at four salmon farms in southern Chile. Spawning periods were similar in 1993 and 1994 (39 and 41 d, respectively). The spawning period of May–June, corresponded to the full reproductive period in the northern hemisphere. The mean weight of mature females (about 4 kg) was almost double the weight reported in the northern hemisphere for 2-year-old maturing females. The pigmented eyed stage was reached approximately 270 accumulated temperature units (ATU days × °C above 0°C after fertilization. Averages for total fecundity (3,802 ± 956 eggs/female, mean ± SD; N = 1, 188), relative fecundity (986 ± 274 eggs/ kg; N = 1,170), and egg diameter (7.11 ± 0.51 mm; N = 1,185) were higher than corresponding values reported for coho salmon hatchery stocks in the northern hemisphere. Survival to the eyedegg stage averaged 74.3 ± 24.2% (N = 1,147). Correlations of female body weight wit...","PeriodicalId":22850,"journal":{"name":"The Progressive Fish-culturist","volume":"74 1","pages":"36-40"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76675586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1577/1548-8640(1997)059<0071:TNEOAE>2.3.CO;2
D. Lemarié, D. A. Weller, D. D. Theisen, L. Woods
Abstract We evaluated an electronic fry counter (Jensorter, Inc., model FC-2) for accuracy, precision, and effects on embryo hatchability and larval survival of striped bass Morone saxatilis. Hatching success of embryos and 96-h survival of 5-d larvae passed through the counter did not differ significantly (P > 0.05) from controls. Mean electronic counts of embryos and larvae differed from hand counts by –5.2% and –9.7%, respectively. Precision was estimated by the coefficient of variation of repeated counts and ranged as high as 4.43% for embryos and 8,62% for larvae. Site- and species-specific factors may have increased variability that resulted in the reduced levels of accuracy and precision. The advantages of greatly increased speed of counting and ease of use, as well as potentially better performance under other conditions, warrant further evaluation of this counter with other species and water supplies.
{"title":"Technical Notes: Evaluation of an Electronic Fry Counter with Striped Bass Embryos and Larvae","authors":"D. Lemarié, D. A. Weller, D. D. Theisen, L. Woods","doi":"10.1577/1548-8640(1997)059<0071:TNEOAE>2.3.CO;2","DOIUrl":"https://doi.org/10.1577/1548-8640(1997)059<0071:TNEOAE>2.3.CO;2","url":null,"abstract":"Abstract We evaluated an electronic fry counter (Jensorter, Inc., model FC-2) for accuracy, precision, and effects on embryo hatchability and larval survival of striped bass Morone saxatilis. Hatching success of embryos and 96-h survival of 5-d larvae passed through the counter did not differ significantly (P > 0.05) from controls. Mean electronic counts of embryos and larvae differed from hand counts by –5.2% and –9.7%, respectively. Precision was estimated by the coefficient of variation of repeated counts and ranged as high as 4.43% for embryos and 8,62% for larvae. Site- and species-specific factors may have increased variability that resulted in the reduced levels of accuracy and precision. The advantages of greatly increased speed of counting and ease of use, as well as potentially better performance under other conditions, warrant further evaluation of this counter with other species and water supplies.","PeriodicalId":22850,"journal":{"name":"The Progressive Fish-culturist","volume":"87 1","pages":"71-74"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75345362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1577/1548-8640(1997)059<0059:CTCOLS>2.3.CO;2
M. Denson, T. Smith
Abstract In 1995, two studies were conducted at the Marine Resources Research Institute, Charleston, South Carolina, that focused on development of techniques to intensively rear larval sunshine bass, the hybrid of female white bass Morone chrysops and male striped bass M. saxatilis. During the first study, the rotifer Brachionus plicatilis was shown to be an acceptable first-food when fed at 10 organisms/mL in static black tanks receiving high surface illumination (mean, 600 lx). It was further demonstrated that larvae could be switched to a diet of just nauplii of Artemia sp. by at least day 8 post-hatch. At the conclusion of the 8-d study, larvae fed Artemia nauplii earlier were significantly larger (9.12 mm total length, TL) than larvae fed rotifers through day 7 posthatch (6.71 mm TL). However, there were no survival differences (mean, 67.2%). During the second study, supplementation of the Artemia nauplii diet with a commercial larval feed offered no advantage to 12-d-old larvae, which had similar s...
{"title":"Communications: Tank Culture of Larval Sunshine Bass","authors":"M. Denson, T. Smith","doi":"10.1577/1548-8640(1997)059<0059:CTCOLS>2.3.CO;2","DOIUrl":"https://doi.org/10.1577/1548-8640(1997)059<0059:CTCOLS>2.3.CO;2","url":null,"abstract":"Abstract In 1995, two studies were conducted at the Marine Resources Research Institute, Charleston, South Carolina, that focused on development of techniques to intensively rear larval sunshine bass, the hybrid of female white bass Morone chrysops and male striped bass M. saxatilis. During the first study, the rotifer Brachionus plicatilis was shown to be an acceptable first-food when fed at 10 organisms/mL in static black tanks receiving high surface illumination (mean, 600 lx). It was further demonstrated that larvae could be switched to a diet of just nauplii of Artemia sp. by at least day 8 post-hatch. At the conclusion of the 8-d study, larvae fed Artemia nauplii earlier were significantly larger (9.12 mm total length, TL) than larvae fed rotifers through day 7 posthatch (6.71 mm TL). However, there were no survival differences (mean, 67.2%). During the second study, supplementation of the Artemia nauplii diet with a commercial larval feed offered no advantage to 12-d-old larvae, which had similar s...","PeriodicalId":22850,"journal":{"name":"The Progressive Fish-culturist","volume":"107 1","pages":"59-63"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77415156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1577/1548-8640(1997)059<0025:POSBFS>2.3.CO;2
C. Keembiyehetty, D. Gatlin
Abstract Practical diets that contain high levels of plant proteins often require supplementation with methionine to satisfy the total sulfur amino acid requirements of animals. The present study was designed to evaluate L-methionine, DL-methionine, N-acetyl-DL-methionine (acetylmethionine), and DL-methionine hydroxy analog (MHA) as supplements in soybean-meal-based diets for sunshine bass, the hybrid of white bass Morone chrysops ♀ × striped bass M. saxatilis ♂. Five practical diets were formulated to contain crude protein at 40% of dry weight, with 75% of the protein provided by soybean meal and 25% provided by menhaden fish meal. The basal diet provided total sulfur amino acids from intact protein at approximately 1.0% of dry diet, and the test diets were supplemented with each of the methionine compounds at 0.3% dry weight on an equal-sulfur basis (except for an additional 25% for MHA). A control diet was formulated to contain 40% crude protein exclusively from menhaden fish meal. All experimental die...
{"title":"Performance of Sunshine Bass Fed Soybean-Meal-Based Diets Supplemented with Different Methionine Compounds","authors":"C. Keembiyehetty, D. Gatlin","doi":"10.1577/1548-8640(1997)059<0025:POSBFS>2.3.CO;2","DOIUrl":"https://doi.org/10.1577/1548-8640(1997)059<0025:POSBFS>2.3.CO;2","url":null,"abstract":"Abstract Practical diets that contain high levels of plant proteins often require supplementation with methionine to satisfy the total sulfur amino acid requirements of animals. The present study was designed to evaluate L-methionine, DL-methionine, N-acetyl-DL-methionine (acetylmethionine), and DL-methionine hydroxy analog (MHA) as supplements in soybean-meal-based diets for sunshine bass, the hybrid of white bass Morone chrysops ♀ × striped bass M. saxatilis ♂. Five practical diets were formulated to contain crude protein at 40% of dry weight, with 75% of the protein provided by soybean meal and 25% provided by menhaden fish meal. The basal diet provided total sulfur amino acids from intact protein at approximately 1.0% of dry diet, and the test diets were supplemented with each of the methionine compounds at 0.3% dry weight on an equal-sulfur basis (except for an additional 25% for MHA). A control diet was formulated to contain 40% crude protein exclusively from menhaden fish meal. All experimental die...","PeriodicalId":22850,"journal":{"name":"The Progressive Fish-culturist","volume":"85 1","pages":"25-30"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83914818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1577/1548-8640(1997)059<0031:GPOJWS>2.3.CO;2
Yibo Cui, S. Hung, D. Deng, Yunxia Yang
Abstract Juvenile (mean ± SE, 8.6 ± 0.1 g) white sturgeon Acipenser transmontanus were fed for 8 weeks under one of six feeding regimens: continuously 24 h/d (C24); continuously 12.8 h/d during the day (C12/D), continuously 12.8 h/d at night (C12/N), 6 meals/d (M6), 4 meals/d (M4), and 2 meals/d (M2). Specific growth rate, feed efficiency, and body lipid content were significantly (P < 0.05) affected by the feeding regimen. These variables were highest in the C24 group and lowest in the M2 group; fish in the M6 group showed the second best performance. Specific growth rate and feed efficiency in terms of wet weight in the M6 groups were not significantly different from those in the C24 groups, but specific growth rate in terms of energy and energy retention efficiency were significantly lower. Feeding regimen had no effect on condition factor, hepatosomatic index, coefficient of variation in final body weight, and protein and ash contents. There was no significant difference in these indexes between 12.8-...
{"title":"Growth performance of juvenile white sturgeon as affected by feeding regimen","authors":"Yibo Cui, S. Hung, D. Deng, Yunxia Yang","doi":"10.1577/1548-8640(1997)059<0031:GPOJWS>2.3.CO;2","DOIUrl":"https://doi.org/10.1577/1548-8640(1997)059<0031:GPOJWS>2.3.CO;2","url":null,"abstract":"Abstract Juvenile (mean ± SE, 8.6 ± 0.1 g) white sturgeon Acipenser transmontanus were fed for 8 weeks under one of six feeding regimens: continuously 24 h/d (C24); continuously 12.8 h/d during the day (C12/D), continuously 12.8 h/d at night (C12/N), 6 meals/d (M6), 4 meals/d (M4), and 2 meals/d (M2). Specific growth rate, feed efficiency, and body lipid content were significantly (P < 0.05) affected by the feeding regimen. These variables were highest in the C24 group and lowest in the M2 group; fish in the M6 group showed the second best performance. Specific growth rate and feed efficiency in terms of wet weight in the M6 groups were not significantly different from those in the C24 groups, but specific growth rate in terms of energy and energy retention efficiency were significantly lower. Feeding regimen had no effect on condition factor, hepatosomatic index, coefficient of variation in final body weight, and protein and ash contents. There was no significant difference in these indexes between 12.8-...","PeriodicalId":22850,"journal":{"name":"The Progressive Fish-culturist","volume":"18 1","pages":"31-35"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74509119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1577/1548-8640(1997)059<0041:EOSLSA>2.3.CO;2
J. Rach, T. M. Schreier, G. Howe, S. Redman
Abstract Hydrogen peroxide is a drug of low regulatory priority status that is effective in treating fish and fish eggs infected by fungi. However, only limited information is available to guide fish culturists in administering hydrogen peroxide to diseased fish. Laboratory tests were conducted to determine (1) the sensitivity of brown trout Salmo trutta, lake trout Salvelinus namaycush, fathead minnow Pimephales promelas, walleye Stizostedion vitreum, channel catfish Ictalurus punctatus, and bluegill Lepomis machrochirus to hydrogen peroxide treatments; (2) the sensitivity of various life stages of rainbow trout Oncorhynchus mykiss to hydrogen peroxide treatments; and (3) the effect of water temperature on the acute toxicity of hydrogen peroxide to three fish species. Fish were exposed to hydrogen peroxide concentrations ranging from 100 to 5,000 μL/L (ppm) for 15-min or 45-min treatments every other day for four consecutive treatments to determine the sensitivity of various species and life stages of fi...
{"title":"Effect of Species, Life Stage, and Water Temperature on the Toxicity of Hydrogen Peroxide to Fish","authors":"J. Rach, T. M. Schreier, G. Howe, S. Redman","doi":"10.1577/1548-8640(1997)059<0041:EOSLSA>2.3.CO;2","DOIUrl":"https://doi.org/10.1577/1548-8640(1997)059<0041:EOSLSA>2.3.CO;2","url":null,"abstract":"Abstract Hydrogen peroxide is a drug of low regulatory priority status that is effective in treating fish and fish eggs infected by fungi. However, only limited information is available to guide fish culturists in administering hydrogen peroxide to diseased fish. Laboratory tests were conducted to determine (1) the sensitivity of brown trout Salmo trutta, lake trout Salvelinus namaycush, fathead minnow Pimephales promelas, walleye Stizostedion vitreum, channel catfish Ictalurus punctatus, and bluegill Lepomis machrochirus to hydrogen peroxide treatments; (2) the sensitivity of various life stages of rainbow trout Oncorhynchus mykiss to hydrogen peroxide treatments; and (3) the effect of water temperature on the acute toxicity of hydrogen peroxide to three fish species. Fish were exposed to hydrogen peroxide concentrations ranging from 100 to 5,000 μL/L (ppm) for 15-min or 45-min treatments every other day for four consecutive treatments to determine the sensitivity of various species and life stages of fi...","PeriodicalId":22850,"journal":{"name":"The Progressive Fish-culturist","volume":"72 1","pages":"41-46"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84546232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-01-01DOI: 10.1577/1548-8640(1997)059<0064:POWEAE>2.3.CO;2
R. C. Heidinger, R. Brooks, D. Leitner, Irina R. Soderstrom
Abstract Survival of the eggs and embryos of walleye Stizostedion vitreum from fertilization through the eye-up stage just prior to hatch was determined at approximately 6, 72, and 180 h postfertilization—3, 45, and 112 temperature units (TU = days × °C above 0°C). Mean survival was 58.5% at 6 h, 50.3% at 72 h, and 49.9% at 180 h. Eighty-three percent of the total egg mortality occurred prior to 6 h. Survival was significantly different (P = 0.0052) only between the 6-h and 180-h estimates. A predictive equation was calculated for survival from 6 h to 180 h: percent survival at 180 h = 5.4997 + 0.7596 × percent survival at 6 h; R 2 = 0.597, P < 0.0001. This equation, used in conjunction with techniques described in this paper, can provide estimates of walleye egg survival early in the incubation period, which can save time and effort in both research and large-scale production.
在受精后约6、72和180 h - 3、45和112个温度单位(TU = days ×°C以上0°C)，测定了卵细胞和胚胎从受精到孵化前的睁眼期的存活率。6小时的平均存活率为58.5%，72小时为50.3%，180小时为49.9%。总卵死亡率的83%发生在6小时之前。只有6小时和180小时的存活率有显著差异(P = 0.0052)。计算6 h至180 h的生存率预测方程:180 h存活率= 5.4997 + 0.7596 × 6 h生存率;R 2 = 0.597, p < 0.0001。该方程与本文描述的技术结合使用，可以在孵化期早期提供对斜眼鱼卵存活率的估计，从而节省了研究和大规模生产的时间和精力。
{"title":"Prediction of Walleye Egg and Embryo Survival at Two Stages of Development","authors":"R. C. Heidinger, R. Brooks, D. Leitner, Irina R. Soderstrom","doi":"10.1577/1548-8640(1997)059<0064:POWEAE>2.3.CO;2","DOIUrl":"https://doi.org/10.1577/1548-8640(1997)059<0064:POWEAE>2.3.CO;2","url":null,"abstract":"Abstract Survival of the eggs and embryos of walleye Stizostedion vitreum from fertilization through the eye-up stage just prior to hatch was determined at approximately 6, 72, and 180 h postfertilization—3, 45, and 112 temperature units (TU = days × °C above 0°C). Mean survival was 58.5% at 6 h, 50.3% at 72 h, and 49.9% at 180 h. Eighty-three percent of the total egg mortality occurred prior to 6 h. Survival was significantly different (P = 0.0052) only between the 6-h and 180-h estimates. A predictive equation was calculated for survival from 6 h to 180 h: percent survival at 180 h = 5.4997 + 0.7596 × percent survival at 6 h; R 2 = 0.597, P < 0.0001. This equation, used in conjunction with techniques described in this paper, can provide estimates of walleye egg survival early in the incubation period, which can save time and effort in both research and large-scale production.","PeriodicalId":22850,"journal":{"name":"The Progressive Fish-culturist","volume":"86 1","pages":"64-67"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79369648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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