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Bading, Katharina Tissy; Kaehlert, Sarah; Chi, Xupeng; Jaspers, Cornelia; Martindale, Mark Q; Javid Mohammad Pour, Jamileh (2017): Regeneration of Mnemiopsis leidyi under different food quantities. PANGAEA, https://doi.org/10.1594/PANGAEA.874073, Supplement to: Bading, KT et al. (2017): Food availability drives plastic self-repair response in a basal metazoan- case study on the ctenophore Mnemiopsis leidyi A. Agassiz 1865. Scientific Reports, 7(1), https://doi.org/10.1038/s41598-017-16346-w

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Abstract:
Many marine invertebrates including ctenophores are capable of extensive body regeneration when injured. However, as for the invasive ctenophore Mnemiopsis leidyi, there is a constant subportion of individuals not undergoing whole body regeneration but forming functionally stable half-animals instead. Yet, the driving factors of this phenomenon have not been addressed so far. This study sheds new light on how differences in food availability affect self-repair choice and regeneration success in cydippid larvae of M. leidyi. As expected, high food availability favored whole-body regeneration. However, under low food conditions half-animals became the preferential self-repair mode. Remarkably, both regenerating and half-animals showed very similar survival chances under respective food quantities. As a consequence of impaired food uptake after injury, degeneration of the digestive system would often occur indicating limited energy storage capacities. Taken together, this indicates that half-animals may represent an alternative energy-saving trajectory which implies self-repair plasticity as an adaptive trade-off between high regeneration costs and low energy storage capacities. We conclude that self-repair plasticity could lead to higher population fitness of ctenophores under adverse conditions such as in ships' ballast water tanks which is postulated to be the major vector source for the species' spreading around the globe.
Comment:
Data on health status of uncut larvae (group 1 and group 3) limited because they were assessed by different inspector.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1SpeciesSpeciesJavid Mohammad Pour, Jamileh
2Experiment dayExp daydayJavid Mohammad Pour, JamilehDay 0=prior cutting; Days 2,4,6,8,10=after cutting
3GroupGroupJavid Mohammad Pour, JamilehTreatment group
4IdentificationIDJavid Mohammad Pour, Jamileh
5TreatmentTreatJavid Mohammad Pour, Jamilehcutting
6Treatment: foodT:foodJavid Mohammad Pour, Jamilehfood level
7InvestigatorInvestigatorJavid Mohammad Pour, Jamileh
8StatusStatusJavid Mohammad Pour, Jamilehcurrent survival status (0=dead, 1=alive, NA=not assessable due to accidental loss)
9ScoreScoreJavid Mohammad Pour, JamilehHealth score: health status of sample 3=looking healthy and normal, 2=superficial infection (holes)/weak, 1=strong physical defects,desintegrating
10SizeSizeµmJavid Mohammad Pour, Jamilehoral-aboral length
11SizeSizeµmJavid Mohammad Pour, Jamilehsize before cutting
12SizeSizeµmJavid Mohammad Pour, Jamilehsize 2 days after cutting
13FoodFoodJavid Mohammad Pour, Jamilehprey visible in gut or gastrular system (0=not present, 1=present)
14ScoreScoreJavid Mohammad Pour, Jamilehbody score, time-dependent variable, overall body score calculated as sum from tissue scores of statocyst, comb rows, tentacle bulb, tentacle, max. 14.3 if all tissue were regenerated to original size
15ScoreScoreJavid Mohammad Pour, Jamilehmax score, maximum body score observed during experiment
16Recovery ModeRecov modeJavid Mohammad Pour, Jamilehregeneration event ocurred or not: 0=no regeneration or failed attempt (half animals), 1=regeneration observed, NA=could not be assessed due to early death
Size:
10152 data points

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