Effects of feeding and starvation on the metabolic rate of the necrophagous Antarctic amphipod Waldeckia obesa (Chevreux, 1905)

Chapelle, Gauthier; Peck, Lloyd S.; Clarke, Andrew

doi:10.1016/0022-0981(94)90157-0

Cited by 49 publications

(31 citation statements)

References 35 publications

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“…Couloximetry is one of the methods that has successfully been used for oxygen measurements of polar invertebrates in several studies (e.g. Chapelle et al 1994;Chapelle and Peck 1995;Schmid 1996;Brockington 2001;Peck and Veal 2001). The authors gained precision but lost high temporal resolution by utilizing this method.…”

Section: Respiration Experimentsmentioning

confidence: 99%

“…On the other hand, small changes in oxygen concentration are easier to detect in closed bottle systems (e.g. Chapelle et al 1994). Furthermore, no adjustment time is needed when operating a closed bottle system.…”

Section: Witman 1997)mentioning

confidence: 99%

“…Polar invertebrates usually have low oxygen consumption rates (e.g. Clarke 1983;Chapelle et al 1994;Chapelle and Peck 1995;Peck and Conway 2000, and references therein). When comparing sessile invertebrates with motile fauna we can expect a considerably lower metabolic activity and thus extremely low oxygen consumption rates.…”

Section: Introductionmentioning

confidence: 99%

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Oxygen microoptodes: a new tool for oxygen measurements in aquatic animal ecology

et al. 2002

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We describe two applications of a recently introduced system for very precise, continuous measurement of water oxygen saturation. Oxygen microoptodes (based on the dynamic fluorescence quenching principle) with a tip diameter of $50 lm, an eightchannel optode array, an intermittent flow system, and online data registration were used to perform two types of experiments. The metabolic activity of Antarctic invertebrates (sponges and scallops) was estimated in respiration experiments, and, secondly, oxygen saturation inside living sponge tissue was determined in different flow regimes. Even in long-term experiments (several days) no drift was detectable in between calibrations. Data obtained were in excellent correspondence with control measurements performed with a modified Winkler method. Antarctic invertebrates in our study showed low oxygen consumption rates, ranging from 0.03-0.19 cm 3 O 2 h -1 ind. -1 . Oxygen saturation inside living sponge specimens was affected by flow regime and culturing conditions of sponges. Our results suggest that oxygen optodes are a reliable tool for oxygen measurements beyond the methodological limits of traditional methods.

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Section: Respiration Experimentsmentioning

confidence: 99%

Section: Witman 1997)mentioning

confidence: 99%

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Oxygen microoptodes: a new tool for oxygen measurements in aquatic animal ecology

et al. 2002

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“…For a variety of animals, excretion has been found to increase after a meal, often after the rise in respiration rate (i.e., the specific dynamic action) associated with processing food. However, the extent to which these rates increase and their relative timing vary greatly between species (e.g., Chapelle et al 1994;Boyce and Clarke 1997).…”

Section: Excretion In Relation To Feeding-mentioning

confidence: 99%

Ammonium excretion by Antarctic krill Euphausia superba at South Georgia

Atkinson

Whitehouse

2000

Limnology & Oceanography

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Excretion by Antarctic krill Euphausia superba (hereafter ''krill'') is measured typically in small containers of filtered seawater for 12-24 h, which may cause a reduction of swimming, feeding, and metabolism. If the maximum published excretion rates are realistic, krill would be a major source of regenerated nitrogen in the South Georgia area because of their high biomass there. Because literature values are variable, depending on season, feeding history and the experimental set-up, our aim was to measure both a mean and an upper value of krill excretion rate at South Georgia. Experiments were on juvenile krill during October-November 1997 and January 1998. Freshly caught animals excreted 1.6-2.8 nmol ammonium mg Ϫ1 dry mass h Ϫ1; within the fivefold range of summer literature values for equivalent-sized krill. Maximum rates were determined on acclimated krill in large containers during alternating 1-d periods with and without food. During the feeding periods in saturating food concentrations, the mean daily ration was ϳ32% of body carbon d Ϫ1 and excretion was 210% (October-November) and 280% (January) of the values for freshly caught krill. This equates to a maximum loss of ϳ2% of body nitrogen d Ϫ1 . Excretion rates decreased during the 1-d periods without food, and rates during the feeding periods were ϳ30% higher than in those without food. This suggests that the lack of feeding in traditional experiments leads to roughly 30% underestimates of excretion rate. These results help to set some limits on ammonium production rates of South Georgia krill over regional scales. Our calculations suggest that the role of krill in this varies between habitats to the west of the island (insignificant) and those in the east (significant).

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“…The relatively high amount of triacylglycerols in the lipids indicates periods of starvation, where storage lipids may be important for survival. This ®nding is supported by feeding experiments that revealed that W. obesa is well adapted to long periods of starvation (Chapelle et al 1994). Coleman (1991) reported that this species can endure periods of up to 18 months without feeding.…”

Section: Discussionmentioning

confidence: 79%

Combined lipid, fatty acid and digestive tract content analyses: a penetrating approach to estimate feeding modes of Antarctic amphipods

2001

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Antarctic amphipods from the Weddell Sea and Brans®eld Strait were collected to investigate the impact of various species and feeding types on lipid and fatty acid compositions. In combination with digestive tract content analyses, such information can help clarify the type of feeding mode of the various amphipod species. Micro-and macropredatory amphipod species had only small amounts of triacylglycerols as storage lipids, whereas the deposit-feeder

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Effects of feeding and starvation on the metabolic rate of the necrophagous Antarctic amphipod Waldeckia obesa (Chevreux, 1905)

Cited by 49 publications

References 35 publications

Oxygen microoptodes: a new tool for oxygen measurements in aquatic animal ecology

Oxygen microoptodes: a new tool for oxygen measurements in aquatic animal ecology

Ammonium excretion by Antarctic krill Euphausia superba at South Georgia

Combined lipid, fatty acid and digestive tract content analyses: a penetrating approach to estimate feeding modes of Antarctic amphipods

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