Food quantity shapes life history and survival strategies in Daphnia magna (Cladocera)

Pietrzak, Barbara; Grzesiuk, Małgorzata; Bednarska, Anna

doi:10.1007/s10750-010-0135-9

Cited by 33 publications

(29 citation statements)

References 23 publications

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“…Such a trade-off is commonly observed in Daphnia (Glazier & Calow, 1992;Dudycha, 2003). For example, Pietrzak et al (2010) found that investments in early reproduction were costly in Daphnia and result in a shortened lifespan. In our experiment a similar pattern was observed.…”

Section: Discussionmentioning

confidence: 90%

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Food availability affects the strength of mutualistic host–microbiota interactions in Daphnia magna

et al. 2015

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The symbiotic gut microbial community is generally known to have a strong impact on the fitness of its host. Nevertheless, it is less clear how the impact of symbiotic interactions on the hosts' fitness varies according to environmental circumstances such as changes in the diet. This study aims to get a better understanding of host-microbiota interactions under different levels of food availability. We conducted experiments with the invertebrate, experimental model organism Daphnia magna and compared growth, survival and reproduction of conventionalized symbiotic Daphnia with germ-free individuals given varying quantities of food. Our experiments revealed that the relative importance of the microbiota for the hosts' fitness varied according to dietary conditions. The presence of the microbiota had strong positive effects on Daphnia when food was sufficient or abundant, but had weaker effects under food limitation. Our results indicate that the microbiota can be a potentially important factor in determining host responses to changes in dietary conditions. Characterization of the host-associated microbiota further showed that Aeromonas sp. was the most prevalent taxon in the digestive tract of Daphnia.

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Section: Discussionmentioning

confidence: 90%

“…Food limitation has been shown to decrease growth and reproduction while increasing longevity (Pietrzak et al, 2010). Here, we investigate the effects of variation in food availability on host-microbiota interactions in Daphnia by comparing symbiotic with germ-free hosts raised in environments with different levels of food availability.…”

Section: Introductionmentioning

confidence: 99%

Food availability affects the strength of mutualistic host–microbiota interactions in Daphnia magna

et al. 2015

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“…Diet quality has been shown to have a mixed impact on the survivorship of other crustaceans, such as amphipods, whose survivorship on diets that mix high-and low-quality food sources varies widely depending on the species (Cruz-Rivera & Hay 2000a,b), and diet quantity is inversely correlated with longevity in a variety of species (e.g. Lawler et al 2008, Pietrzak et al 2010. Alternatively, the inclusion of nitrogen-rich animal tissue in its diet significantly improved the reproductive investment and physiological condition of Aratus pisonii.…”

Section: Discussionmentioning

confidence: 99%

Fitness-associated consequences of an omnivorous diet for the mangrove tree crab Aratus pisonii

Riley¹,

Vogel²,

Griffen³

2014

Aquat. Biol.

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Omnivory is a widespread trophic strategy with variable impacts on survival and reproduction, even within closely related taxonomic groups. In coastal ecosystems experiencing extensive environmental changes, many decapod crustaceans employ omnivorous feeding strategies. Because animals initially respond to environmental changes with behavioral modifications that can alter their foraging habits, a mechanistic understanding of how diet influences fitness is essential to predict the impact of future environmental changes on species fitness and population dynamics. We investigated the impact of an omnivorous diet on the consumption, survivorship, physiological condition, and reproductive effort of the mangrove tree crab Aratus pisonii, a major mangrove consumer. A. pisonii engaged in compensatory feeding on plant material; crabs consumed more food and digested it less efficiently as the proportion of plant material in their diet increased. Although there were relatively few deaths, survival appeared to be negatively impacted by the consumption of large quantities of animal material and marginally negatively influenced by high levels of plant consumption. Physiological condition improved due to consumption of both plant and animal material, while only consumption of animal material increased reproductive investment. These results demonstrate that the opportunistic inclusion of animal material in the diet of A. pisonii significantly improves physiological condition and reproductive effort, and suggests that vitellogenic individuals cannot fully compensate for a lack of animal material in their diet by increasing plant consumption. This study provides a mechanistic framework to understand how potential diet changes by omnivorous crabs such as A. pisonii, which are facing numerous changes in their environment, may impact their fitness and population dynamics.

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“…This can again be linked to an energy allocation perspective. When nutrients are limiting, organisms allocate energy towards increased reproduction and growth rate, but at the cost of survival (Boggs 2009;PietrzaK et al 2010).…”

Section: Discussionmentioning

confidence: 99%

“…For instance, the keystone grazer Daphnia (Crustacea, Branchiopoda) requires a sufficient amount of P to invest in P-rich ribosomal RNA (rRNA), which is needed for protein synthesis and growth (eLser et al 2000(eLser et al , 2003. Nutrient deprivation will also affect trade-offs between life history traits, e.g., prolonging life span, but at the cost of reproduction (Boggs 2009;PietrzaK et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Synergistic effects of dual parasitism in Daphnia magna under nutrient limitation

et al. 2017

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ABSTRACT. Human-induced increases in the bioavailability of carbon (C), nitrogen (N) and phosphorus (P) have the potential to alter the context for host-parasite dynamics in aquatic ecosystems. Given that both eutrophication and infectious diseases are becoming more prominent, it is essential to disentangle the factors that determine virulence expression in keystone grazers. Here, we focus on the impact of nutrient limitation in single versus dual parasite exposure in the water flea Daphnia magna (Crustacea, Branchiopoda). For this, we fed specimens of D. magna with algae differing in C:N:P ratios and exposed them to two virulent parasites, Pasteuria ramosa (bacteria) and the agent causing White Fat Cell (WFCD, unknown classification), both in single and dual parasite exposure treatments. Exposure to the two parasites synergistically reduced host survival, mainly driven by WFCD exposure, especially under severe nutrient limitation. Under these conditions individuals of D. magna began reproducing earlier, which resulted in a higher reproductive output upon dual parasite exposure. We here discuss these results within the framework of host stress responses, nutrient allocation and energy budgets, and conclude that the way food quality interferes with host-parasite interactions varies, depending on the parasite species involved, the nutrient requirements of all actors and the trait investigated.

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Food quantity shapes life history and survival strategies in Daphnia magna (Cladocera)

Cited by 33 publications

References 23 publications

Food availability affects the strength of mutualistic host–microbiota interactions in Daphnia magna

Food availability affects the strength of mutualistic host–microbiota interactions in Daphnia magna

Fitness-associated consequences of an omnivorous diet for the mangrove tree crab Aratus pisonii

Synergistic effects of dual parasitism in Daphnia magna under nutrient limitation

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