Inhibitory Effects of Phytoplankton upon the Feeding of Daphnia Magna with Reference to Growth, Reproduction, and Survival

Ryther, John H.

doi:10.2307/1931041

Cited by 157 publications

(73 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thus, we see no reason to assume that: the inhibitory substance chlorellin should not be effective in young cultures; the fact that Ryther (1954) did not note inhibition in Daphnia cultures fed log-phase algae is not understandable in the light of the earlier work. feeding habit was observed-a change from filter-feeding to grazing, or foraging.…”

Section: Numbers and Form Of Fecal Ejectamentioning

confidence: 67%

See 1 more Smart Citation

The Role of Larval Chironomidae in the Production of Lacustrine Copropel in Mud Lake, Marion County, Florida1

Iovino

Bradley

1969

Limnology & Oceanography

View full text Add to dashboard Cite

Mud Lake is a shallow (avg 45 cm), alkaline (pH 7.7–10.2), brown‐water lake having an area of about 180 ha. A study of its organic sediment was undertaken because it appears to be a present‐day analogue of the richly organic lacustrine oozes that were the precursors of the oil shales of the Green River Formation (Eocene). The water contains about 200 ppm total dissolved solids. The soft ooze is about 1 m thick and consists of minute fecal pellets produced primarily by larvae of Chironomus (Chironomus) sp. Mean numbers of larvae ranged from 120 to 580 m−2; such a small population may reflect extensive predation by fish. The small diversity of Chironomidae at this latitude may reflect the fact that few organisms can tolerate the physical conditions produced by the shallow water. Experiments with laboratory‐reared Mud Lake midges showed that the numbers of fecal pellets produced generally increased with the concentration of algal cells available; that only when the larvae were fed blue‐green algae were the fecal pellets coherent and durable—larvae fed green algae produced pellets that disintegrated, returning the undigested algae to the food supply; and that larvae fed blue‐green algae changed from filter‐feeding to grazing on the fecal pellets when suspended algal cells became sparse. We conclude that the sediment in Mud Lake is pelletal because only blue‐green algae are available for food and that the larvae probably graze because all the blue‐greens live only on, or in, the fecal pellets. Early instars produce ovoid pellets; later instars produce longer, cylindrical pellets. The analogy between the Mud Lake pelletal ooze and the Eocene precursors of the Green River Formation oil shale is enhanced by the facts that some oil shale thin sections show minute fecal pellets and that certain beds of rich oil shale contain numerous unmineralized remains of immature chironomids.

show abstract

Section: Numbers and Form Of Fecal Ejectamentioning

confidence: 67%

“…Ryther { 1954) found that Daphnia magna fed senescent cultures of Chlorellu showed much greater inhibition in growth and reproduction than did those fed algae that were in the log-phase of growth. We used only young cultures of algae.…”

Section: Numbers and Form Of Fecal Ejectamentioning

confidence: 94%

The Role of Larval Chironomidae in the Production of Lacustrine Copropel in Mud Lake, Marion County, Florida1

Iovino

Bradley

1969

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…Both the dependent variables and animal size were transformed to their decimal logarithms because such transformations usually linearize interspecific body size relations (Brody 1945;Bonner 1965;Peters 1983 Ambler and Frost 1974;Anraku and Omori 1963;Baudouin and Ravera 1972;Bogdan and McNaught 1975;Comita 1968;Comita and Schindler 1963;Conover 1959;Durbin and Durbin 1978;Harvey 1937;Hebert 1978;Heinle 1966;Kryutchkowa and Rybak 197 1;Lemcke and Lampert 1975;McMahon and Rigler 1965;Marshall and Orr 1955;Moshiri et al 1969;Nival et al 1974;Omori 1970;Rakusa-Suszczewski et al 1976;Ryther 1954;Sameoto 1976;Sushchenya 1958;Taguchi and Ishi 1972. ) feeding rates may not be monotonic functions of temperature (Kersting and Van der Leeuw 1976;Zankai and Ponyi 1976), food concentration (Richman 1966;Rigler 197 1;Frost 1975;Mullin et al 1975;Muck and Lampert 1980;Downing 198 1;Porter et al 1982), or food particle volume (Allan et al 1977;McQueen 1970;Nival and Nival 1976).…”

Section: Methodsmentioning

confidence: 99%

Empirical analysis of zooplankton filtering and feeding rates1

Peters

Downing

1984

Limnology & Oceanography

343

203

View full text Add to dashboard Cite

Multiple regression analysis of published zooplankton filtering and feeding rates yielded separate regression equations for cladocerans, marine Calanoid copepods, and all zooplankton. Ingestion rate was found to increase significantly with animal size, food concentration, and temperature. Filtering rate also increased with animal size and temperature, but declined as food concentration increased. The analysis suggests a difference in particle size preference between cladocerans and copepods. Experimental conditions such as crowding and duration also significantly affected filtering and feeding rates. The regression models allow examination of differences and similarities among zooplankton taxa, functional response, particle size selection, energy allocation, and threshold food concentration. The statistical models describe suspension feeding more precisely than either average literature values or verbal descriptions of trend. The results also suggest possible mechanisms of feeding limitation and provide a heuristic framework for the design of experimental analyses of zooplankton feeding in marine and freshwater systems.

show abstract

“…5) and zooplankton grazing decreased (Table 3). It has been observed in laboratory experiments that zooplankton grazing rate decreases with slower growing phytoplankton (Ryther 1954, Mullin 1963, possibly d u e to reduced chemical cues or negative feedback (Poulet & Oulett 1982, Cowles et al 1986). …”

Section: Phytoplankton Productivitymentioning

confidence: 99%

Plankton response following a spring upwelling event in the Ria de Arosa, Spain

Rb¹,

Alvarez-Ossorio²,

Cal³

et al. 1986

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Phytoplankton and bacterioplankton growth dynamics, and biomass and ingestion rates of zooplankton and mussels hung from rafts in the Ria de Arosa, Spain, were studied after a spring upwelling event. Upwelling of North Atlantic Central Water was confirmed by salinity, temperature and nutrient properties of the bottom waters in the Ria and the positive upwelling index calculated for the study period. On 11 March. 1983, primary production and chlorophyll a concentrations exceeded 30 mg C m-3 h-' and 10 mg m-3, respectively, in the surface waters. After the upwelling period primary production decreased to < 2 mg C m-3 h-'. Our results show that bacterial growth dynamics were spatially (vertically) separated from phytoplankton growth dynamics following the upwelling event. The hghest specific rate of bacterial production occurred below the depth of maximum photosynthesis and above the thermocline. The highest rates of bacterial production were < 10 O/O of phytoplankton production. Zooplankton (>333 km) grazing experiments indicated an active selection of phytoplankton over bacteria and a sufficient grazing rate (90 to 124 '

show abstract

Inhibitory Effects of Phytoplankton upon the Feeding of Daphnia Magna with Reference to Growth, Reproduction, and Survival

Cited by 157 publications

References 13 publications

The Role of Larval Chironomidae in the Production of Lacustrine Copropel in Mud Lake, Marion County, Florida1

The Role of Larval Chironomidae in the Production of Lacustrine Copropel in Mud Lake, Marion County, Florida1

Empirical analysis of zooplankton filtering and feeding rates1

Plankton response following a spring upwelling event in the Ria de Arosa, Spain

Contact Info

Product

Resources

About