| tadpoles of four common australian frogs are not effective predators of the common pest and vector mosquito culex annulirostris. | in a laboratory investigation of tadpoles of 4 australian frogs, limnodynastes peronii, limnodynastes tasmaniensis, litoria aurea, and litoria peronii, there was no evidence of active predation on larvae of culex annulirostris. the mortality of larvae was greatest when exposed to the tadpoles of litoria spp., which may have been the result of specific foraging behavior. results indicate that litoria spp. tadpoles may have a minor impact on mosquito populations, but they are unlikely to be useful ... | 2005 | 16506583 |
| distribution of frogs in rice bays within an irrigated agricultural area: links to pesticide usage and farm practices. | in the coleambally irrigation area (nsw, australia), the occurrence of four tadpole and frog species in rice bays on farms growing either rice only or both rice and corn was studied over two seasons. in addition to analysis of species occurrence, both gonadal histology and assessment of batrachochytrium dendrobatidis infection rates were performed. the rice acreage available as potential tadpole habitat was extensively distributed throughout the irrigation area, but more corn was grown in the no ... | 2009 | 19220075 |
| morphological abnormalities in frogs from a rice-growing region in nsw, australia, with investigations into pesticide exposure. | three frog species (limnodynastes tasmaniensis, limnodynastes fletcheri and litoria raniformis) were surveyed in rice bays of the coleambally irrigation area (cia), nsw, australia, during the rice-growing seasons of 2005/2006 and 2006/2007. a total external morphological abnormality index of 7.0% was observed in frogs of the cia (n=1,209). the types and frequencies of abnormalities were typical of reports from agricultural areas with ectrodactyly being the most common aberration. a relatively lo ... | 2011 | 20229166 |
| larval tolerance to salinity in three species of australian anuran: an indication of saline specialisation in litoria aurea. | recent anthropogenic influences on freshwater habitats are forcing anuran populations to rapidly adapt to high magnitude changes in environmental conditions or face local extinction. we examined the effects of ecologically relevant elevated salinity levels on larval growth, metamorphosis and survival of three species of australian anuran; the spotted marsh frog (limnodynastes tasmaniensis), the painted burrowing frog (neobatrachus sudelli) and the green and golden bell frog (litoria aurea), in o ... | 2012 | 22916260 |
| growth, development and sex ratios of spotted marsh frog (limnodynastes tasmaniensis) larvae exposed to atrazine and a herbicide mixture. | exposures of limnodynastes tasmaniensis tadpoles to atrazine (0.1, 1, 3 and 30microgl(-1)), metolachlor (0.1, 1 and 10microgl(-1)) and thiobencarb (90, 180 and 360microgl(-1)) from gosner stage 28 to 42 under controlled laboratory conditions gave no significant effects on tadpole growth, development and sex ratios. a binary mixture of atrazine and thiobencarb as well as a ternary mixture of all three herbicides also had no significant effects on the developing larvae to show no evidence of inter ... | 2010 | 20044125 |
| effect of sperm concentration, medium osmolality and oocyte storage on artificial fertilisation success in a myobatrachid frog (limnodynastes tasmaniensis). | the present study optimised artificial fertilisation and oocyte storage conditions in limnodynastes tasmaniensis (myobatrachidae). data on general reproductive biology, the effect of sperm motility and concentration, medium osmolality and oocyte storage on artificial fertilisation success are presented. egg number was most strongly correlated with bodyweight (r = 0.819). sperm yield was correlated with testes weight (r = 0.827), which was strongly correlated with snout-vent length (r = 0.772). o ... | 2004 | 15304208 |
| stream permanence influences microalgal food availability to grazing tadpoles in arid-zone springs. | primary production in many ephemeral waters peaks soon after inundation, but the extent to which the algal biomass generated by this process is immediately available to aquatic herbivores as a food source has not been extensively studied. to examine this, we exposed natural epilithon from two permanent and two recently rewetted temporary reaches of an intermittent stream to grazing by small, presumably newly hatched, limnodynastes tasmaniensis tadpoles and compared the algal content of tadpole f ... | 1999 | 28307278 |
| on the possible role of prostaglandin e2 in intestinal stasis in the gastric brooding frog rheobatrachus silus. | responses of isolated intestinal preparations from the anurans bufo marinus and limnodynastes tasmaniensis to various agents have been studied, as models for the intestinal stasis reported in the rare gastric brooding frog, rheobatrachus silus. it is inferred from the responses that the preparations possessed excitatory muscarinic and histamine receptors and inhibitory adrenergic receptors, conforming to the typical vertebrate pattern. the circular muscle was unresponsive to prostaglandin e2, wh ... | 1984 | 6437385 |
| a pathogenic skin fungus and sloughing exacerbate cutaneous water loss in amphibians. | batrachochytrium dendrobatidis (bd) is a pathogenic fungus that causes the cutaneous, infectious disease chytridiomycosis and has been implicated in population declines of numerous anuran species worldwide. proximate cause of death by chytridiomycosis is asystolic cardiac arrest as a consequence of severe disruption to electrolyte balance. animals heavily infected with bd also experience a disruption to their skin sloughing regime, indicating that core functions of the skin, such as water retent ... | 2018 | 29752415 |
| contaminant mixtures interact to impair predator-avoidance behaviours and survival in a larval amphibian. | global declines in amphibian populations are a significant conservation concern, and environmental contamination is likely a contributing driver. although direct toxicity may be partly responsible, contaminants are often present at sub-lethal concentrations in the wild. behavioural end-points are becoming an increasingly useful method to estimate the impact of contaminants, particularly if the behavioural responses manifest to affect individual fitness (i.e. survival, growth, or reproduction). i ... | 2018 | 29913416 |