| immunocytochemical and morphometric study of prolactin cells during amphibian morphogenesis. | the peroxidase-antiperoxidase (pap) immunocytochemical technique and rabbit antihuman prolactin (prl) antiserum were used to localize and identify prl-producing cells in the pars distalis of bufo calamita, hyla meridionalis, alytes cisternasii, pelobates cultripes, and rana perezi tadpoles at different stages of development as well as in 1-year-old post-metamorphic animals. this cell type was located throughout the gland in p. cultripes and r. perezi and in the caudal two-thirds in b. calamita, ... | 1988 | 3284780 |
| immunohistochemical localization of thyrotropic cells during amphibian morphogenesis: a stereological study. | tsh-like producing cells have been studied using the peroxidase-antiperoxidase (pap) immunohistochemical technique and rabbit anti-human thyrotropin (tsh) antiserum in the pars distalis of five species of amphibian anuran tadpoles at different stages of development as well as in 1-year-old postmetamorphic animals. this cell type has been identified and located in the pars distalis ventral zone of bufo calamita showing no changes in its distribution pattern throughout development, and in rana per ... | 1988 | 3410290 |
| [sonsinotrema calloti dollfus, 1951 in hyla meridionalis in camargue]. | | 1972 | 4650807 |
| comparative distribution of neurotensin-like immunoreactivity in the brain of a teleost (carassius auratus), an amphibian (hyla meridionalis), and a reptile (gallotia galloti). | the distribution of neurotensin (nt) was studied in the brain of three species belonging to the three major classes of cold-blooded vertebrates: teleost fishes (carassius auratus), anuran amphibians (hyla meridionalis), and reptiles (gallotia galloti; lacertidae). by using antibodies directed against synthetic bovine nt in the three species, immunoreactive cell bodies were discovered mostly in the telencephalon and diencephalon, in particular at the level of the preoptic region the mediobasal hy ... | 1994 | 7836560 |
| polystoma gallieni: experimental evidence for chemical cues for developmental plasticity. | among monogeneans that display direct life cycles, plastic developmental strategies may have been selected to counter the lack of transmission opportunities. within amphibian polystomatids, some species of the genus polystoma develop into two different phenotypes depending on the host physiological stage to which free swimming larvae attach. when oncomiracidia infest old tadpoles, they develop slowly and migrate during host metamorphosis towards the bladder where they reach maturity. on the othe ... | 2009 | 19014939 |
| expression patterns of abd-a/lox4 in a monogenean parasite with alternative developmental paths. | a key issue in evolutionary developmental biology is to assess the roles of homeotic genes in order to uncover the origins of animal diversity. within parasitic platyhelminths which show a large diversity of developmental strategies, only one study related to the expression of hox genes has so far been conducted involving a digenean species with a complex life cycle. in the present study, we considered the expression levels of the pg-lox4 gene within polystoma gallieni of the monogenea which dis ... | 2010 | 20546802 |
| alternative parasite development in transmission strategies: how time flies! | among parasitic platyhelminths with complex life cycles, it has been well documented that transmission opportunities are the main forces shaping the diversity of life-history traits and parasite developmental strategies. while deviations in the development pathway usually involve shortening of life cycles, their extension may also occur following perception of remaining time by parasites. polystoma gallieni, the monogenean parasite of hyla meridionalis, is able to trigger two alternative develop ... | 2010 | 20796135 |
| alternative development in polystoma gallieni (platyhelminthes, monogenea) and life cycle evolution. | considering the addition of intermediate transmission steps during life cycle evolution, developmental plasticity, canalization forces and inherited parental effect must be invoked to explain new host colonization. unfortunately, there is a lack of experimental procedures and relevant models to explore the adaptive value of alternative developmental phenotypes during life cycle evolution. however, within the monogeneans that are characterized by a direct life cycle, an extension of the transmiss ... | 2013 | 23896124 |
| warm vegetarians? heat waves and diet shifts in tadpoles. | temperature can play an important role in determining the feeding preferences of ectotherms. in light of the warmer temperatures arising with the current climatic changes, omnivorous ectotherms may perform diet shifts toward higher herbivory to optimize energetic intake. such diet shifts may also occur during heat waves, which are projected to become more frequent, intense, and longer lasting in the future. here, we investigated how heat waves of different duration affect feeding preferences in ... | 2016 | 27870032 |
| influence of developmental stage on sensitivity to ammonium nitrate of aquatic stages of amphibians. | in static renewal experiments, we studied how developmental stage influences the effect of ammonium nitrate on embryonic and larval stages of anuran amphibians. the observed lethal effects caused by ammonium nitrate increased with both concentration and duration of exposure. significant differences were observed in sensitivity to ammonium nitrate as a function of developmental stage in discoglossus galganoi, pelobates cultripes, and bufo calamita. in d. galganoi and p. cultripes, younger individ ... | 2006 | 16494230 |
| inter- and intra-specific variation on sensitivity of larval amphibians to nitrite. | several authors have suggested that nitrogen-based fertilizers may be contributing to the global amphibian decline. we have studied the impact of sodium nitrite on early aquatic stages of epidalea calamita, pelophylax perezi and hyla meridionalis larvae from doñana national park (coastal wetland) and p. perezi from gredos mountain (high mountain ponds), exposed during 10 to 16 days. after 8 days of exposure all p. perezi larvae from doñana presented 100% mortality at 5 mg l(-1)n-no2(-) while e. ... | 2008 | 18023843 |
| structure of the mating calls and relationships of the european tree frogs (hylidae, anura). | as an extension of earlier investigations, the mating calls ofhyla arborea kretensis, hyla a. molleri, andhyla a. sarda were studied, and variations in the calls with air temperature were determined. the mating calls of these species exhibit the typical structure, made up of short pulses of varying amplitude. the call duration and the inter-call interval decrease linearly with increasing temperature (over the range in which calls can occur), whereas the number of pulses per call does not change. ... | 1974 | 28308100 |
| [rhythm of acoustic activity of hyla arborea (linné) and hyla meridionalis boettger anourous amphibians]. | | 1967 | 4229306 |
| diversification and speciation in tree frogs from the maghreb (hyla meridionalis sensu lato), with description of a new african endemic. | comparative molecular studies emphasized a new biogeographic paradigm for the terrestrial fauna of north africa, one of the last uncharted ecoregions of the western palearctic: two independent east-west divisions across the maghreb. through a comprehensive phylogeography, we assessed how this model suits the genetic diversification documented for the tree frog hyla meridionalis sensu lato. analyses of mtdna variation and thousands of nuclear loci confirmed the old split (low-pliocene) between tu ... | 2019 | 30776435 |
| mating call discrimination by females of the treefrog hyla meridionalis on tenerife. | mating behavior of hyla meridionalis was observed at an artificial reservoir in punta del hidalgo, tenerife. playback experiments were conducted in the field near the reservoir. the density of calling males was extremely high, and individuals sometimes called within 5 cm of each other. males often changed calling positions and successfully attempted to clasp one another. gravid females were common and most often found in amplexus. in three of four observations, the male initiated amplexus from a ... | 1980 | 24897718 |