Life cycle of <i>Diaptomus oregonensis</i> Lilljeborg in Sunfish Lake, Ontario

Lai, H. C.; Carter, J. C. H.

doi:10.1139/z70-220

Cited by 8 publications

(5 citation statements)

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“…An increase in the development rate of copepods with increasing food concentrations has been observed previously (Lai and Carter 1970;Mullin and Brooks 1970;Harris 1977;Woodward and White 1983). The decrease in naupliar survivorship with increasing food concentration that we observed is a bit more unusual.…”

Section: Discussionsupporting

confidence: 83%

Food limitation in naupliar and adult Diaptomus pallidus1

Williamson

Butler

Forcina

1985

Limnology & Oceanography

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The relationships between survivorship and fecundity of Diaptomus pakdus and algal food concentrations (Cryptomonas reflexa) were examined with a flow-through system that prevents the depletion and settling of algal cells. Egg production in adult females increased with increasing food concentration up to a maximum at 600 pg dry wt liter-*. Under starvation conditions, egg production stopped and survival decreased, whereas at 60 pg dry wt liter-l production was halted and survival was high. Adults survived longer under conditions of starvation than did nauplii. Adult survival was high at all food concentrations; naupliar survival was highest at 60 pg dry wt liter-*, slightly lower at 600 pg dry wt liter-l, and much lower at 6,000 pg dry wt liter-l. Naupliar development was faster at 600 and 6,000 pg dry wt liter-l than at 60 pg dry wt liter-l.

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Section: Discussionsupporting

confidence: 83%

Food limitation in naupliar and adult Diaptomus pallidus1

Williamson

Butler

Forcina

1985

Limnology & Oceanography

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“…Inspite of this dilemma whether these two generations were actually different, other data (Lai & Carter, 1970) did indicate that the G3 adults dominated the samples beginning October 23, 1968 which was in good agreement with the situation depicted in Fig . I of this paper .…”

Section: Changes In Cephalothorax Lengthsupporting

confidence: 85%

“…Weekly samples were collected from Sunfish Lake, Ontario, Canada, as previously described (Lai & Carter, 1970) . D .…”

Section: Methodsmentioning

confidence: 99%

“…oregonensis (Lai, 1969), though the possibility of segregated niches for individual species cannot be ruled out . In short, the cephalothorax length seemed to be primarily determined by the temperature factor during the phytoplankton rich winter season as indicated by the negative correlation coefficient between temperature and the body size .…”

Section: Changes In Cephalothorax Lengthmentioning

confidence: 99%

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Changes in cephalothorax length of diatomus oregonensis as an indicator of generations

Lai

1977

Hydrobiologia

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“…On the other hand, considerable correlative evidence is available which suggests that low levels of food in some lakes may limit calanoid populations (e.g., Comita & Anderson 1959;Czeczuga 1959;Lai & Carter 1970;Maly 1973). Food limitation of natural populations of freshwater calanoids has been shown experimentally (Weglenska 1971;Elmore 1980) by comparing life history parameters of lake populations to animals raised at the same temperature and in the same 222 water but with adequate food added.…”

Section: Discussionmentioning

confidence: 99%

The influence of food concentration and container volume on life history parameters of Diaptomus dorsalis Marsh from subtropical Florida

Elmore

1982

Hydrobiologia

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IntroductionTwo experiments were conducted with a subtropical calanoid, Diaptomus dorsalis Marsh 1907, to determine the influence of food concentration and the volume of medium per copepod (one copepod in each of several containers of different volumes) on post-embryonic development rates, adult body size, clutch size, survivorship and sex ratio. Low concentrations of food (Chlamydomonas reinhardti) decreased development rates, body size, clutch size and survivorship; the sex ratio did not vary significantly from 1:1. Small container volumes had the same effects as low food concentrations, except that naupliar development time was not affected and survivorship showed greater variability. Because the copepod parameters exhibited maximum responses when food was abundant, even in the smallest container volume, it was concluded that container volume did not directly influence these parameters but exerted its effect through food availability.Larger life history stages were affected more than smaller life history stages by low food levels. In part, this was attributed to a laboratory artifact in which depletion of food by larger animals was greater than by smaller animals and, in part, to a real effect of low food concentration. A possible explanation of this real effect came from comparisons of these results to data from D. dorsalis fed phytoplankton from a Florida lake. The comparisons suggested that nauplii may be more efficient feeders on, or utilizers of, small food items such as Chlamydomonas.Numerous studies of natural zooplankton populations have correlated concentration of food with responses of various life history parameters. Although such studies have been useful in suggesting factors which may influence these parameters in nature, it has often been impossible to separate the effects of food from other factors, e.g., temperature, water quality and predation.For this reason, laboratory studies have been undertaken to elucidate the relationships between food concentration and zooplankton life history parameters. There have been many studies of the effects of food concentration on rotifers (e.g.

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Life cycle of Diaptomus oregonensis Lilljeborg in Sunfish Lake, Ontario

Cited by 8 publications

References 0 publications

Food limitation in naupliar and adult Diaptomus pallidus1

Food limitation in naupliar and adult Diaptomus pallidus1

Changes in cephalothorax length of diatomus oregonensis as an indicator of generations

The influence of food concentration and container volume on life history parameters of Diaptomus dorsalis Marsh from subtropical Florida

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