An investigation of allelopathic effects of <i>Daphnia</i>

Matveev, Vladimir

doi:10.1111/j.1365-2427.1993.tb00748.x

Cited by 70 publications

(77 citation statements)

References 19 publications

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“…The former two observations suggest that daphnids experience crowded conditions as conditions of food stress, although they were fed the same amount of algae. Only a few studies have tried to disentangle the direct effect of crowding from food concentration effects in the laboratory (Seitz 1984;Guisande 1993;Matveev 1993;Goser and Ratte 1994;Burns 1995). With the exception of Seitz (1984), all of these authors reported the same pattern as found in our study: although food was abundant, animals reacted as if they were food limited.…”

Section: Discussionsupporting

confidence: 73%

Environmental stress and local adaptation in Daphnia magna

Meester

Boersma

Spaak

1999

Limnology & Oceanography

103

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The effects of fish kairomones, crowding chemicals, and day length on the life-history traits of a set of 16 Daphnia magna clones, derived from four populations that differ in fish-predation pressure, were studied. Significant among-population differences were observed, the differences being in concordance with the hypothesis of local adaptation. The among-population genetic differences were not mediated through a change in response to fish kairomones, but through an overall smaller body size, smaller eggs, and a higher number of eggs in clones derived from habitats in which fish are present. Using a model, we show that the observed changes in life-history characteristics may lead to differences in fitness under different predation regimes, such that populations from habitats with fish have highest fitness under fish-predation regimes and populations without a fish background have higher fitness values under invertebrate predation regimes.

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Section: Discussionsupporting

confidence: 73%

Environmental stress and local adaptation in Daphnia magna

Meester

Boersma

Spaak

1999

Limnology & Oceanography

103

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“…Crowding in laboratory populations of cladocerans and rotifers can affect feeding, growth, age at first reproduction, and fecundity. In many of these cases, the positive or negative effects of crowding are attributable to unidentified chemicals produced by the population (Seitz 1984;Helgen 1987;Matveev 1993;Goser and Ratte 1994;Burns 1995Burns , 2000Kirk 1998;Yoshinaga et al 1999;Mitchell and Carvalho 2002). In addition, crowding provides a stimulus for the initiation of bisexual reproduction in both Daphnia (Stross and Hill 1965) and Brachionus (Gilbert 1963a(Gilbert , 2002Hino and Hirano 1976;Snell and Boyer 1988).…”

mentioning

confidence: 99%

“…The chemicals responsible for affecting growth and fecundity in Daphnia operate across species (Seitz 1984;Burns 1995Burns , 2000, and water conditioned by Daphnia carinata inhibits feeding in conspecifics, Daphnia lumholtzi, Moina micrura, and Diaphanosoma unguiculatum (Matveev 1993). …”

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confidence: 99%

Specificity of crowding response that induces sexuality in the rotifer Brachionus

Gilbert

2003

Limnology & Oceanography

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Crowding induced the production of mictic (male-producing) females in Brachionus calyciflorus from two North American strains and an Australian strain. The specificity of this response to crowding was tested by culturing single individuals of a North American clone in three treatment conditions: a small volume (high density), a large volume (low density), and a large volume with a high density of an Australian clone. The results were consistent and clear in six experiments using different combinations of clones. Crowding low-density individuals of the North American strains with the Australian strain failed to induce them to produce mictic females. The mictic-female response in this treatment was similar to that in the low-density treatment, and both of these responses were significantly lower than that in the high-density treatment. Since the mictic-female response to crowding in Brachionus is mediated by a chemical produced by the rotifers themselves, the chemical inducers produced by the Australian and North American strains must be different. Taxonomically specific responses to crowding should increase fitness by assuring that sexual reproduction in the heterogonic life cycle coincides with a high population density of individuals able to mate with one another and, thus, when the production of fertilized resting eggs can be maximized. This would be especially important in plankton communities with diverse rotifer assemblages and multiple congeneric species. Otherwise, a low-density population of a species could be induced to initiate bisexual reproduction by populations of other species, curtailing its potential for population growth via female parthenogenesis and limiting its production of resting eggs in the future.Changes in zooplankton demographics and reproductive mode may occur at high population densities, and they can be induced by chemicals produced by the population itself. Crowding in laboratory populations of cladocerans and rotifers can affect feeding, growth, age at first reproduction, and fecundity. In many of these cases, the positive or negative effects of crowding are attributable to unidentified chemicals produced by the population

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“…There is some evidence in the water flea Daphnia that chemicals are involved in habitat segregation between competing species. Infochemicals released from (intra-und interspecific) competitors affected a number of life history parameters of Daphnia pulex and Daphnia cucullata (Matveev 1993;Boersma et al 1999;Lü rling et al 2003), and Daphnia magna was found to avoid media, which had been inhabited by D. pulex (Roozen and Lü rling 2001).…”

Section: The Mechanism Of Interactive Habitat Segregationmentioning

confidence: 99%

Flexible habitat selection and interactive habitat segregation in the marine congeners Idotea baltica and Idotea emarginata (Crustacea, Isopoda)

2006

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Habitat segregation among competing species is widespread yet very little is know how this is achieved in practice. In a case study, we examined short-term effects of conspecific and congeneric density on habitat selection in two competing marine isopod species, Idotea emarginata and Idotea baltica. Under semi-natural conditions in large outdoor cylindrical tanks (4 m high; volume 5.5 m 3 ), animal groups of different size and composition had the choice between a set of relevant habitat samples (surface-floating seaweed, the water column, seaweed on the bottom). Habitat selection in both I. baltica and I. emarginata proved to be largely independent of conspecific density (level of intraspecific competition). In single-species treatments, both species showed a similar and stable pattern of distribution, with a clear preference for seaweed on the bottom. In mixed-species treatments (MST), however, the species were largely separated by habitat. While the distribution of I. emarginata was completely unaffected by the mere presence of interspecific competitors, habitat selection of I. baltica changed notably when I. emarginata was present. The habitat use patterns observed in MST conformed to those realized in geographical areas where the two species overlap in distribution: I. emarginata is dominant among decaying seaweed on the sea floor, and I. baltica is the dominant species among surface-floating seaweed. Our findings suggest that habitat segregation between the two species is essentially interactive, resulting from rapid decision-making of I. baltica with respect to habitat selection. The underlying mechanism is discussed. I. emarginata is highly superior to I. baltica in interference competition and rapidly eliminates the latter from one-habitat systems which do not allow I. baltica to escape from this interaction. In more natural, heterogeneous environments, however, I. baltica seems to be able to coexist with the superior competitor due to its broader habitat niche, flexibility in habitat selection, and a behavioural disposition to avoid normally preferred habitats when these are occupied by I. emarginata.

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An investigation of allelopathic effects of Daphnia

Cited by 70 publications

References 19 publications

Environmental stress and local adaptation in Daphnia magna

Environmental stress and local adaptation in Daphnia magna

Specificity of crowding response that induces sexuality in the rotifer Brachionus

Flexible habitat selection and interactive habitat segregation in the marine congeners Idotea baltica and Idotea emarginata (Crustacea, Isopoda)

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