ISSN:
1573-5117
Keywords:
architomy
;
asexual reproduction
;
Dugesia tahitiensis
;
fission
;
head frequency
;
photoperiod
;
planarians
;
regeneration
;
Tricladida
;
Turbellaria
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract A pilot study was performed to assess the regenerative capacities of Dugesia tahitiensis Gourbault, 1977, an exclusively fissiparous planarian species. Animals measuring 9.5–12.5 mm in length were used. Head regeneration rate determined by the appearance of eye spots (Brødsted, 1969: 29–46) was extremely high: at 23 °C, it took 43–59 h to regenerate clearly discernible eye spots in 28 specimens. For comparison, 3.8 days were reported for the regeneration of eye spots in 11.9–12.7 mm long D. tigrina (Girard) at 24 °C (Mead, 1985). As all posterior fragments regenerated a head, irrespective of the cutting level, D. tahitiensis seems to match the Phagocata velata (Stinger) type with a head frequency of 100% at every level (Teshirogi et al., 1977; cf. also Brøndsted, 1969:30).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00036400
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