Feeding by Alewives (<i>Alosa pseudoharengus</i>) on Larval Lake Whitefish (<i>Coregonus clupeaformis</i>) in the Laboratory

Hoagman, Walter J.

doi:10.1139/f74-040

Cited by 22 publications

(10 citation statements)

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“…Year-class strength of fish, and thus stock size, is determined during early life stages (May 1974;Salojärvi 1991). Several factors are known to influence survival and thus the success of the coregonid larvae stocked: When artificial reproduction is practiced, rearing conditions and size at the time of stocking are important (Hoagman 1974;Flü chter 1980;Taylor and Freeberg 1984;Urban-Jezierska and Biernacki 1992).…”

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confidence: 99%

Importance of Diet Type, Food Particle Size, and Tank Circulation for Culture of Lake Hallwil Whitefish Larvae

Enz

Schäffer

Müller

2001

North American Journal of Aquaculture

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A commercial dry diet and both live and frozen zooplankton were compared as food for cultured larvae of Lake Hallwil whitefish Coregonus suidteri during the first 3 weeks after hatching. Whitefish larvae fed live zooplankton grew considerably larger (16.4 mm final length) than those fed frozen zooplankton (14.4 mm), but mortality did not differ significantly (0% versus 3%). Larvae fed the dry diet reached nearly the same length (13.6 mm) as the fish fed frozen zooplankton. However, mortality of fish fed the dry diet was significantly higher (34%) than that of fish fed live or frozen zooplankton. We conclude that diet acceptance is a key factor for whitefish larvae, accounting for the highest growth rates by larvae fed live zooplankton. We also tested the effect of two additional factors on larval mortality: food particle size and water circulation in the rearing tanks. The size of food pellets was reduced from 200–400 μm to 100–200 μm. The water inflow to the tanks was placed below the water surface to increase the time the dry diet was afloat. Our results showed that neither particle size nor inflow placement affected mortality when fish were fed ad libitum. Nevertheless, feed floating times were prolonged significantly when the inflow was placed below the water surface, making it possible to decrease the feeding frequency, reduce food losses, and, thus decrease the amount of daily ration fed.

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confidence: 99%

Importance of Diet Type, Food Particle Size, and Tank Circulation for Culture of Lake Hallwil Whitefish Larvae

Enz

Schäffer

Müller

2001

North American Journal of Aquaculture

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“…All available data pointed to several successive year-class failures as the primary cause of the recent decline, and the year-classes appeared to be failing during the first few months of life (Francis et al 1996). We hypothesized that alewives Alosa pseudoharengus suppressed yellow perch recruitment because the alewife is a potentially important predator or competitor of larval fish, including yellow perch (Smith 1970;Hoagman 1974;Rhodes et al 1974;Crowder 1980;Kohler and Ney 1980;Jude and Tesar 1985;Brandt et al 1987;Crowder et al 1987;Luecke et al 1990;Krueger et al 1995;Mason and Brandt 1996;Brooking et al 1998), and because the introduction and population expansion of the alewife in Lake Michigan has previously been implicated in declines of yellow perch and other indigenous species (Smith 1970;Wells 1977;Wells and Jorgenson 1983;Jude and Tesar 1985;Eck and Wells 1987). We examined the relationship between the abundance of alewives age-1 and older and yellow perch recruitment in Indiana waters of Lake Michigan to determine if the two were inversely related.…”

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Relationship between Alewife Abundance and Yellow Perch Recruitment in Southern Lake Michigan

Shroyer

McComish

2000

North American Journal of Fisheries Management

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We examined the relationship between the abundance of alewives Alosa pseudoharengus and the recruitment of yellow perch Perca flavescens to determine if alewives were potentially responsible for yellow perch recruitment failures in southern Lake Michigan after 1988. We used annual June-August bottom trawl data from two 5-m-depth index sites near Michigan City, Indiana, during 1984Indiana, during -1998 to index alewife abundance as the catch per unit effort (CPUE) of age-1 and older fish and yellow perch recruitment as the CPUE of age-2 fish. The relationship between alewife abundance and yellow perch recruitment was modeled as log e R tϩ2 ϭ 11.7 Ϫ (2.12) log e A t , where log e R tϩ2 is the natural log of the CPUE of age-2 yellow perch in year t ϩ 2 and log e A t is the natural log of the CPUE of alewives age 1 and older in year t. The model explained greater than 70% of the variability in recruitment of the 1984-1996 yellow perch year-classes. We conclude that yellow perch year-class failures in Indiana waters of Lake Michigan were largely explained by an increase of mean alewife abundance after 1988 and that the yellow perch fishery is unlikely to fully recover unless mean alewife abundance returns to an extremely low level, similar to the early 1980s.

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“…In theory, predation could regulate bloater recruitment under three different scenarios. First, nonindigenous adult alewives Alosa pseudoharengus are effective predators of fish larvae (Hoagman 1974;Rice et al 1987a;Krueger et al 1995), and when bloater recruitment in the late 1970s began increasing while alewife densities declined, some hypothesised that predation by adult alewife on bloater larvae had been a recruitment bottleneck (e.g., Eck & Wells 1987). More recent studies, however, have discounted this hypothesis given the limited spatiotemporal overlap between adult alewife and pelagic bloater larvae ) and the lack of explanatory power of adult alewife in bloater recruitment models (Bunnell et al 2006).…”

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confidence: 99%

Population‐level effects of egg predation on a native planktivore in a large freshwater lake

Bunnell

Mychek-Londer

Madenjian

2013

Ecology of Freshwater Fish

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Using a 37-year recruitment time series, we uncovered a field pattern revealing a strong, inverse relationship between bloater Coregonus hoyi recruitment success and slimy sculpin Cottus cognatus biomass in Lake Michigan (United States), one of the largest freshwater lakes of the world. Given that slimy sculpins (and deepwater sculpin Myoxocephalus thompsonii) are known egg predators that spatiotemporally overlap with incubating bloater eggs, we used recently published data on sculpin diets and daily ration to model annual bloater egg consumption by sculpins for the 1973-2010 year-classes. Although several strong year-classes were produced in the late 1980s when the proportion of eggs consumed by slimy sculpins was extremely low (i.e., <0.001) and several weak year-classes were produced when the proportion of bloater eggs consumed was at its highest (i.e., >0.10-1.0), egg predation failed to explain why recruitment was weak for the [1995][1996][1997][1998][1999][2000][2001][2002][2003][2004][2005] year-classes when the proportion consumed was also low (i.e., <0.02). We concluded that egg predation by slimy and deepwater sculpins could have limited bloater recruitment in some years, but that some undetermined factor was more important in many other years. Given that slimy sculpin densities are influenced by piscivorous lake trout Salvelinus namaycush, the restoration of which in Lake Michigan has lagged behind those in lakes Superior and Huron, our study highlights the importance of an ecosystem perspective when considering population dynamics of fishes.

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Feeding by Alewives (Alosa pseudoharengus) on Larval Lake Whitefish (Coregonus clupeaformis) in the Laboratory

Cited by 22 publications

References 0 publications

Importance of Diet Type, Food Particle Size, and Tank Circulation for Culture of Lake Hallwil Whitefish Larvae

Importance of Diet Type, Food Particle Size, and Tank Circulation for Culture of Lake Hallwil Whitefish Larvae

Relationship between Alewife Abundance and Yellow Perch Recruitment in Southern Lake Michigan

Population‐level effects of egg predation on a native planktivore in a large freshwater lake

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