Relationship between specific dynamic action and food quality in the solitary ascidian Ciona intestinalis

Sigsgaard, S. J.; Petersen, J. K.; Iversen, Jens

doi:10.1007/s00227-003-1164-y

Cited by 22 publications

(19 citation statements)

References 51 publications

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“…The relationship combining body weight (W) and temperature (T) is summarised by Petersen & Riisgard (1992) as F = (8.3T -6.9)W total 0.68 . Most previous studies on feeding in these species found that CR decreased with increasing particle concentration, both for algal cells and inorganic particles (Robbins 1983, Petersen & Riisgard 1992, Petersen et al 1995, Sigsgaard et al 2003. In a study of Ciona intestinalis and Ascidiella scabra feeding on 3 types of inorganic particulate suspensions, Robbins (1983) found that FR decreased with increasing concentrations in such a way that IR soon became constant and maximal, which now seems to be the general consensus among scientists.…”

Section: Ascidiansmentioning

confidence: 86%

“…For ascidians and bryozoans, a decline in clearance rate (CR), or FR with increasing food availability has been repeatedly demonstrated (Robbins 1983, Petersen et al 1995, Riisgard & Larsen 2000, Lisbjerg & Petersen 2001, Sigsgaard et al 2003, thus giving a relatively constant ingestion rate (IR). However, experiments to date have not been designed to define responses over the full range of natural food availabilities found in oligotrophic open water and turbid nearshore environments (e.g.…”

Section: Open Pen Access Ccessmentioning

confidence: 99%

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Dynamic filter-feeding responses in fouling organisms

Pascoe¹,

Parry²,

Hawkins³

2007

Aquat. Biol.

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Section: Ascidiansmentioning

confidence: 86%

Section: Open Pen Access Ccessmentioning

confidence: 99%

Dynamic filter-feeding responses in fouling organisms

Pascoe¹,

Parry²,

Hawkins³

2007

Aquat. Biol.

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“…Respiration measured in our experiments under different conditions also shown: respiration of feeding animals [respiration (+food) = scenarios 1-3], respiration of well-fed animals without food (respiration (-food) = scenario 4) and fasting metabolic rate (respiration (fasting) = scenario 5). Modified from Sigsgaard et al (2003) Oecologia (2007) 152: 191-200 193 here used synonymously with basal or standard metabolic rate, to a maximal level, and then decreases asymptotically toward the FMR again when feeding stops. As noted above, this feeding-associated increase in respiration is called ''the SDA.''…”

Section: Zooplankton Experimentsmentioning

confidence: 99%

“…During fasting, the respiration of well-fed D. magna decreases toward an asymptotic level. This lower level can be taken to be the basal or FMR of the animal (Fu and Xie 2004;Sigsgaard et al 2003). In this scenario, fully acclimated animals were rinsed with nutrient-free COMBO medium, transferred to new medium, and allowed to fast for 36 h. After fasting, the animals were rinsed again with nutrient-free COMBO medium and transferred to the respiration chamber in pure nutrient-free COMBO medium.…”

Section: Zooplankton Experimentsmentioning

confidence: 99%

“…Thus, The specific dynamic action of an animal can be characterized indirectly by the maximal specific respiration rate above the FMR (here termed MAX, Sigsgaard et al 2003). In our experiments, we calculate this for D. magna grown and fed on different food qualities as the difference between the specific respiration rate of the feeding animals (scenario 3) and the specific respiration rate after fasting (scenario 5).…”

Section: Zooplankton Experimentsmentioning

confidence: 99%

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Does excess dietary carbon affect respiration of Daphnia?

Jensen

Hessen

2007

Oecologia

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Like many invertebrate herbivores, Daphnia frequently face diets with excess carbon (C) relative to elements like phosphorus (P), and with limited ability to store C-rich compounds. To cope with this relative surplus of C they may either regulate the net uptake of C or dispose of excess assimilated C via increased release of dissolved organic carbon or CO(2). Here we investigate whether juvenile Daphnia magna use respiration as a means of stoichiometrically regulating excess C. Growth rate and respiration were measured under different algal food qualities (P-replete and P-depleted algae). Growth rate was strongly reduced by P-depleted food, implying a stoichiometric disposal of excess ingested C. Respiration rates of feeding animals were measured after short- (0.5 h), medium- (12 h) and long- (five days) term acclimation to P-limited food. The respiration rates of animals during active feeding were not affected by the acclimation period per se, whereas food quality had a significant effect; respiration rates of feeding animals increased slightly in individuals receiving low-P food under all acclimation regimes. Respiration was also measured on nonfeeding and fasting animals that had been acclimated for five days to P-limited food. Respiration rates of these animals were strongly affected by feeding conditions but not by food quality; feeding individuals had higher respiration rates than those deprived of food, which again had higher respiration than fasting animals. Although animals grown on low-P food had strongly reduced growth and thus were expected to have decreased respiration rates due to reduced growth-related costs, this seems to be canceled out by increased stoichiometric respiration under P-deficiency. These results indicate that D. magna partly releases excess C as CO(2), but other means of stoichiometric regulation most likely add to this.

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High variability and enhanced nocturnal oxygen uptake in coral reef sponges

Moskovich

Diga

Ilan

et al. 2023

Limnology & Oceanography

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Sponges are animals that feed by filtering water through their perforated body. We examined the in situ diel dynamics of sponge metabolism by continuously measuring the oxygen concentrations in the water inhaled and exhaled by undisturbed sponges. A clear daily pattern of oxygen removal was evident for six of the seven species we studied with their nocturnal oxygen removal being almost double the diurnal values (+ 86 AE 57%). Oxygenic photosynthesis by the sponge's symbiotic or endolithic phototrophic microbes may explain some of the diel difference, but significant day-night differences were also observed in three sponge species for which no evidence of photosynthetic activity (tested with imaging pulse-amplitude-modulation Fluorometry) was found. Mean oxygen removal (AE 95% confidence interval for the mean) per species ranged from 1.7 AE 1 μmol O 2 per liter (hereafter: μmol O 2 L À1 ) for the low microbial abundance (LMA) sponge Callyspongia siphonella to 30.5 AE 10.5 μmol O 2 L À1 for the high microbial abundance HMA) sponge Theonella swinhoei with considerable variation in oxygen removal across all scales (minutes to hours, within and among specimens). Events of high oxygen removal (> 50 μmol L À1 ) were regularly observed for five of the seven species and were predominantly nocturnal, occasionally lasting several hours. The high variability in oxygen removal stresses the need for long-term in-situ measurements of benthic suspension feeders metabolism.

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Relationship between specific dynamic action and food quality in the solitary ascidian Ciona intestinalis

Cited by 22 publications

References 51 publications

Dynamic filter-feeding responses in fouling organisms

Dynamic filter-feeding responses in fouling organisms

Does excess dietary carbon affect respiration of Daphnia?

High variability and enhanced nocturnal oxygen uptake in coral reef sponges

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