Feeding Rate of Calanus Finmarchicus in Relation to Environmental Conditions

Fuller, John L.

doi:10.2307/1537257

Cited by 71 publications

(67 citation statements)

References 8 publications

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“…The magnit1.ldeof the filtering rates found here for Calanus is much greater than those found by Fuller & Clarke (1936) and Fuller (1937). The 1936 measurements were made by estimating the rate at which carmine particles were removed from the water.…”

Section: Grazing Rate Of Copepods 7°3mentioning

confidence: 60%

The grazing rate of planktonic copepods

1951

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The filtering rate of four species of marine planktonic copepods was measured by estimating the rate at which they consumed cultures of Chlamydomonas.The filtering rate was independent of the concentration of the food organism and it is concluded that the copepods were acting as filter feeders.The filtering rates were much greater than those reported by Fuller & Clarke (1936) and Fuller (1937), but agreed with those reported by Harvey (1937).Some evidence was obtained that grazing was restricted to some only of the 24 hr., most probably to the hours of darkness.The filtering rates were approximately proportional to the square of the linear dimensions of the copepod.The purely mechanical selection suggested by Fuller (1937) to account for differences in filtering rates obtained with different species of diatoms cannot account for all the differences which have been observed.It is probable that the copepods could obtain sufficient particulate food in the sea by filtering a daily volume of water corresponding to the filtering rates found.

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Section: Grazing Rate Of Copepods 7°3mentioning

confidence: 60%

The grazing rate of planktonic copepods

1951

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“…We therefore decided against the inclusion of interaction terms in Eq. Butler et al 1969;Conover 1966a;DeVaux 1977;Doohan 1973;Frost 1972Frost , 1977Fuller 1937;Geller 1975;Hastings et al 1962;Kling and Holmgren 1972;Kring and O'Brien 1976a;Lewis 1976;McQueen 1970;Marshall and Orr 1955;Mullin 1963;Mullin et al 1966;Nadin-Hurley and Duncan 1976;Paffenhofer and Knowles 1978;Parsons et al 1969;Richman 1966;Richman and Rogers 1969. ) B.…”

Section: Methodsmentioning

confidence: 99%

Empirical analysis of zooplankton filtering and feeding rates1

Peters

Downing

1984

Limnology & Oceanography

343

203

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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.

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“…In the present experiments, the maximum number of cells consumed per second varied from 0.5 for Oithona simp l e~ to 1.5 for Parvocalanus crassirostns and 0. nana, assuming continuous grazing. The existence of feeding rhythms (Fuller 1937, Petipa 1958, Dagg & Grill 1980, Haney 1988, Saito & Taguchi 1996, discontinuities in the grazing (Cowles & Strickler 1983, Price & Paffenhijfer 1986, Jonsson & Tiselius 1990, Saiz 1994) and active rejection of cells (Paffenhofer et al 1995) implies that the number of cells handled per animal per second of active feeding was even higher. In addition, ingestion rates may appear to slow down, when quantified as cells copepod-' d-l, because copepods may take longer to handle the larger cells that became more prevalent as the concentration of nanoplankton increased.…”

Section: Patterns Of Food Selectionmentioning

confidence: 99%

Copepod grazing in a subtropical bay:species-specific responses to a midsummer increase in nanoplankton standing stock

Calbet¹,

Landry²,

Scheinberg³

2000

Mar. Ecol. Prog. Ser.

110

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Ingestion rates of 4 small copepod species (Oithona simplex, 0. nana. Acrocalanus inermis and Parvocalanus crassirostris) were investigated in Kaneohe Bay, Hawaii, during a nudsummer increase of the pico-and nanoplankton communities. There was no evidence that adult female copepods fed significantly on picoplankton-sized cells. However, all the species responded behaviorally to variations in the concentration (10 to 110 pg C 1-l) and size spectrum (relative increase of cells > 5 pm) of nanoplankton prey. The copepods generally behaved as opportunistic particle feeders, demonstrating higher consumption rates on the most abundant cells (2-5 pm nanoplankton); however, autotrophs were usually selected over heterotrophs of simdar size. Max~murn ingestion rates were similar for the 2 calanoids and 0. nana (around 120000 cells copepod-' d-') and lower for 0. simplex (around 40000 cells copepod-' d-l), but biomass-specific rates of 0. simplex equaled those of the other species. At the highest nanoplankton concentrations, the ingestion rates of copepods appeared saturated, daily rations ranging from 100% body C d-' for A, rnermis to 260% body C d-l for P crassirostris. The differences between ingestion rates measured as cells per copepod per day and those converted to carbon suggested that ingestion might be held below potential by the cumulahve handLing times of individual prey rather than the physioloqcal constraints of food consumption and digestive processing.

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Feeding Rate of Calanus Finmarchicus in Relation to Environmental Conditions

Cited by 71 publications

References 8 publications

The grazing rate of planktonic copepods

The grazing rate of planktonic copepods

Empirical analysis of zooplankton filtering and feeding rates1

Copepod grazing in a subtropical bay:species-specific responses to a midsummer increase in nanoplankton standing stock

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