Effects of salinity on the survival, growth and development of tadpoles of the brown tree frog, Litoria ewingii
- 1 January 2006
- journal article
- research article
- Published by CSIRO Publishing in Australian Journal of Zoology
- Vol. 54 (2), 97-105
- https://doi.org/10.1071/zo06006
Abstract
We investigated the effects of 4% seawater (sw), 8% sw, 12% sw and 16% sw (1.4 g NaCl L–1, 2.8 g NaCl L–1, 4.2 g NaCl L–1 and 5.6 g NaCl L–1, respectively) on survival, mass and development of larvae of the brown tree frog, Litoria ewingii. Salinity of 16% sw significantly decreased survival of tadpoles such that 39% of tadpoles in 16% sw treatment survived to metamorphosis compared with 92% in the control group (freshwater). Growth (mass) of 16% sw tadpoles (0.048 g ± 0.005 g) slowed significantly during early development compared with control tadpoles (0.105 g ± 0.004 g); however, there was no significant difference in final metamorphosis mass between 16% sw (0.192 g ± 0.008 g) and control tadpoles (0.226 ± 0.006 g). Time taken to reach metamorphosis was greater for 16% sw tadpoles (84 ± 1.8 days) than for control tadpoles (55 ± 0.84 days). Tadpoles at salinity concentrations of 4% sw, 8% sw and 12% sw were significantly heavier than control tadpoles at metamorphosis. Our results show that moderate levels of salinity (16% sw) are sufficient to significantly reduce survival and retard development of tadpoles of L. ewingii.Keywords
This publication has 35 references indexed in Scilit:
- Changes in biotic communities developing from freshwater wetland sediments under experimental salinity and water regimesFreshwater Biology, 2005
- Developmental Alterations and Osmoregulatory Physiology of a Larval Anuran under Osmotic StressPhysiological and Biochemical Zoology, 2004
- Effects of salinity on tadpoles of the green and golden bell frog (Litoria aurea)Amphibia-Reptilia, 2002
- Role for corticoids in mediating the response of Rana pipiens tadpoles to intraspecific competitionJournal of Experimental Zoology, 2001
- Hormesis: U-shaped dose responses and their centrality in toxicologyTrends in Pharmacological Sciences, 2001
- Variation in Germination and Survival among Families of Sagittaria latifolia in Response to Salinity and TemperatureInternational Journal of Plant Sciences, 1994
- The Genetic Basis of Altitudinal Variation in the Wood Frog Rana sylvatica. I. An Experimental Analysis of Life History TraitsEvolution, 1982
- Prolactin and thyroid hormone interactions in salt and water balance in the newt Notophthalmus viridescensGeneral and Comparative Endocrinology, 1973
- Antagonism between prolactin and thyroid hormone in amphibian developmentJournal of Experimental Zoology, 1967
- Osmotic Regulation in the Crab-Eating Frog (Rana Cancrivora)Journal of Experimental Biology, 1961