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Paul Turnbull - One of the best experts on this subject based on the ideXlab platform.
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Binns, Kenneth Johnstone - Biographical entry - Companion to Tasmanian History
2015Co-Authors: Paul TurnbullAbstract:Binns, Kenneth Johnstone - Biographical entry - Companion to Tasmanian History - NAME is a biographical, bibliographical and archival database of SUBJECT with links to related articles and images. ADD MORE DESCRIPTION AS REQUIRED
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SUGAR MILLS - SOUTH Johnstone. SOUTH Johnstone CO-OPERATIVE SUGAR MILLING ASSOCIATION LTD, JAPOON ROAD, SOUTH Johnstone, 4859. - Record Holding - The Dalton Guide to Sources in North Queensland
2011Co-Authors: Paul TurnbullAbstract:SUGAR MILLS - SOUTH Johnstone. SOUTH Johnstone CO-OPERATIVE SUGAR MILLING ASSOCIATION LTD, JAPOON ROAD, SOUTH Johnstone, 4859. - Record Holding - The Dalton Guide to Sources in North Queensland - NAME is a biographical, bibliographical and archival database of SUBJECT with links to related articles and images. ADD MORE DESCRIPTION AS REQUIRED
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DEPARTMENT OF PRIMARY INDUSTRIES-SOUTH Johnstone. DEPARTMENT OF PRIMARY INDUSTRIES, SOUTH Johnstone RESEARCH STATION, P.O. BOX 20, SOUTH Johnstone. - Record Holding - The Dalton Guide to Sources in North Queensland
2011Co-Authors: Paul TurnbullAbstract:DEPARTMENT OF PRIMARY INDUSTRIES-SOUTH Johnstone. DEPARTMENT OF PRIMARY INDUSTRIES, SOUTH Johnstone RESEARCH STATION, P.O. BOX 20, SOUTH Johnstone. - Record Holding - The Dalton Guide to Sources in North Queensland - NAME is a biographical, bibliographical and archival database of SUBJECT with links to related articles and images. ADD MORE DESCRIPTION AS REQUIRED
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Johnstone, R.A. - Record Holding - The Dalton Guide to Sources in North Queensland
2011Co-Authors: Paul TurnbullAbstract:Johnstone, R.A. - Record Holding - The Dalton Guide to Sources in North Queensland - NAME is a biographical, bibliographical and archival database of SUBJECT with links to related articles and images. ADD MORE DESCRIPTION AS REQUIRED
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SOUTH Johnstone - Record Holding - The Dalton Guide to Sources in North Queensland
2011Co-Authors: Paul TurnbullAbstract:SOUTH Johnstone - Record Holding - The Dalton Guide to Sources in North Queensland - NAME is a biographical, bibliographical and archival database of SUBJECT with links to related articles and images. ADD MORE DESCRIPTION AS REQUIRED
Ian Beveridge - One of the best experts on this subject based on the ideXlab platform.
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Description and molecular characterisation of Cloacina johnstoni sp. nov. (Nematoda: Strongyloidea) from the wallaroo, Macropus robustus (Marsupialia: Macropodidae) and relationships with the synhospitalic species C. macropodis
Parasitology Research, 2016Co-Authors: Mary Shuttleworth, Abdul Jabbar, Ian BeveridgeAbstract:Cloacina johnstoni sp. nov. (Nematoda: Strongyloidea) is described from the sacculated forestomach of the wallaroo, Macropus robustus (Marsupialia: Macropodidae) from Australia. It resembles the synhospitalic species Cloacina macropodis but differs from it principally in the shape of the cephalic papillae. The two species are also distinguishable based on differences in the first and second internal transcribed spacers (ITS) of nuclear ribosomal DNA (rDNA). Cloacina johnstoni commonly co-occurs in the same individual host as C. macropodis but has a more restricted geographical distribution.
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taxonomic revision of the genus cloacina von linstow nematoda strongyloidea from macropodid marsupials
Invertebrate Systematics, 1998Co-Authors: Ian BeveridgeAbstract:The strongyloid nematode genus Cloacina von Linstow,parasitic in the stomachs of macropodid marsupials, is revised andmorphological taxonomic characters are analysed. Ninety species arerecognised, including 48 which are new. A key to the species is provided. New species are as follows: C. aedon,C. antigone,C. antiope,C. ares,C. artemis, C. caenis,C. cloelia, C. clymene,C. cybele, C. dindymene,C. dirce,C. dis,C. dryope,C. echidne, C. eileithyia,C. enyo, C. eos,C. epona, C. feronia,C. hebe, C. hecuba,C. hera,C. herceus,C. hermes,C. hestia,C. hypsipyle,C. io, C. ips,C. ixion, C. leto,C. littoralis,C. lityerses,C. maia, C. metis,C. nike, C. niobe,C. papillatissima, C. petronius,C . phaeax, C. phaedra,C. phaethon, C. polyxena,C. polyxo, C. selene,C. themis, C. tyche,C. typhon and C. tyro. Cloacina clarkae Mawson is treated as a synonym ofC. similis Johnston & Mawson, whileC. vestibulata Johnston & Mawson becomes a synonymof C. obtusa Johnston & Mawson.C. dubia Johnston & Mawson,C. inflataJohnston & Mawson andC. typica (Johnston & Mawson) are treated asspeciesinquirendae. An annotated checklist of parasites and hosts is provided.
Eloisa Fuenmayor - One of the best experts on this subject based on the ideXlab platform.
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mate choice based on acoustic features in Johnstone s whistling frogeleutherodactylus Johnstonei an experimental approach
South American Journal of Herpetology, 2013Co-Authors: Zaida Tarano, Eloisa FuenmayorAbstract:Abstract. Female choice in anurans is usually affected by the characteristics of the conspecific advertisement call. Mating preferences of Eleutherodactylus Johnstonei females were tested in two-choice experiments in relation to variation of call duration, dominant frequency and call period. Preferences were tested for variants above and below the population mean. Females showed directional preferences for long calls (always preferred the longest call available), and slightly directional preferences for short periods (preferred short over long periods but did not discriminate between short and mean periods). These results altogether indicated a preference for high calling efforts which was corroborated in an additional experiment testing preferences for short calls repeated at short periods (duty cycle: 0.32) over long calls repeated at long periods (duty cycle: 0.19). Preferences for high calling efforts may relate to male quality in territory defense and/or brood care (developing embryos). Females did n...
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calling patterns in male responses to conspecific playbacks in the Johnstone s whistling frog eleutherodactylus Johnstonei
Ethology, 2009Co-Authors: Zaida Tarano, Eloisa FuenmayorAbstract:Vocal interactions are common in chorusing frogs. Changes in the calling patterns of Eleutherodactylus Johnstonei males were analyzed by recording their responses to playbacks of conspecific calls repeated at fixed periods (long: 1.7 s, short: 0.98 s). The call period and timing, estimated through the onset response time, were determined for each male. Males reduced and regularized the period of their calls in response to both stimuli, regardless of their absolute and relative period (i.e., the difference between the male’s period and the stimulus period). Males avoided initiating their calls during ongoing stimuli, but did not time their calls in the silent gap between successive stimuli in ways that reduced the probability of overlap: the proportion of calls without overlap did not depart from random expectations when the silent gap was long, and was smaller than expected when the gap was short. This result indicated that males react to the presence of the virtual competitor but not to its particular characteristics. Fixed responses have been described in other anurans, and often relate to trade-offs between female attraction, male competition, predator attraction, and depletion of energy reserves. Lack of coordination with the stimuli, beyond inhibition of calling during an ongoing stimulus, also indicates somewhat rigid vocal strategies, at least under the experimental conditions. Results from the short period trials suggested a compromise between maintaining a call period and avoiding call overlap. Whether female behavior is influenced by call interference and whether males pay selective attention to distant males instead of to close neighbors must be investigated to better understand the vocal behavior of E. Johnstonei.
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analysis of the vocalizations of Johnstone s whistling frog eleutherodactylus Johnstonei eleutherodactylidae in northern central venezuela
South American Journal of Herpetology, 2008Co-Authors: Zaida Tarano, Eloisa FuenmayorAbstract:Abstract The advertisement call of Eleutherodactylus Johnstonei consists of two adjacent notes (two tones or frequency components). It is, on average, 314 ms in duration, with the first note shorter than the second (86 and 223 ms respectively). The intercall interval is 1.42 s which corresponds to 46,7 calls/min. The dominant frequency of the first note is 1.8 kHz and that of the second note is 3.18 kHz. Both notes contain harmonic series (up to 5 harmonics in the first note and 3 in the second), with narrow bands of constant frequency except for a short and abrupt (38 Hz/ms) upward modulation at the beginning of the second note. Most of the energy of each note is contained in the fundamental band. Spectral characters vary much less than temporal characters, as in other anurans, but variation of spectral characters is amongst the lowest reported so far (~ 1%). There is a weak negative correlation between body mass and the dominant frequency of the call (r = −0.52); therefore call frequency may indicate ma...
Zaida Tarano - One of the best experts on this subject based on the ideXlab platform.
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call intercalation in dyadic interactions in natural choruses of Johnstone s whistling frog eleutherodactylus Johnstonei anura eleutherodactylidae
Behavioural Processes, 2016Co-Authors: Zaida Tarano, Luisana CarballoAbstract:Abstract Communal signaling increases the likelihood of acoustic interference and impairs mate choice; consequently, mechanisms of interference avoidance are expected. Adjustment of the timing of the calls between signalers, specifically call alternation, is probably the most efficient strategy. For this reason, in the present study we analyzed call timing in dyads of males of E. Johnstonei in six natural assemblages. We addressed whether males entrain their calls with those of other males at the assemblage and if they show selective attention in relation to perceived amplitude of the other males’ calls, inter-male distance, or intrinsic call features (call duration, period or dominant frequency). We expected males to selectively attend to closer or louder males and/or to those of higher or similar attractiveness for females than themselves, because those would be their strongest competitors. We found that most males intercalated their calls with those of at least one male. In assemblages of 3 individuals, males seemed to attend to a fixed number of males regardless of their characteristics. In assemblages of more than 3 individuals, the perceived amplitude of the call of the neighboring male was higher, and the call periods of the males were more similar in alternating dyads than in the non-alternating ones. At the proximate level, selective attention based on perceived amplitude may relate to behavioral hearing thresholds. Selective attention based on the similarity of call periods may relate to the properties of the call oscillators controlling calling rhythms. At the ultimate level, selective attention may be related to the likelihood of acoustic competition for females.
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mate choice based on acoustic features in Johnstone s whistling frogeleutherodactylus Johnstonei an experimental approach
South American Journal of Herpetology, 2013Co-Authors: Zaida Tarano, Eloisa FuenmayorAbstract:Abstract. Female choice in anurans is usually affected by the characteristics of the conspecific advertisement call. Mating preferences of Eleutherodactylus Johnstonei females were tested in two-choice experiments in relation to variation of call duration, dominant frequency and call period. Preferences were tested for variants above and below the population mean. Females showed directional preferences for long calls (always preferred the longest call available), and slightly directional preferences for short periods (preferred short over long periods but did not discriminate between short and mean periods). These results altogether indicated a preference for high calling efforts which was corroborated in an additional experiment testing preferences for short calls repeated at short periods (duty cycle: 0.32) over long calls repeated at long periods (duty cycle: 0.19). Preferences for high calling efforts may relate to male quality in territory defense and/or brood care (developing embryos). Females did n...
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calling patterns in male responses to conspecific playbacks in the Johnstone s whistling frog eleutherodactylus Johnstonei
Ethology, 2009Co-Authors: Zaida Tarano, Eloisa FuenmayorAbstract:Vocal interactions are common in chorusing frogs. Changes in the calling patterns of Eleutherodactylus Johnstonei males were analyzed by recording their responses to playbacks of conspecific calls repeated at fixed periods (long: 1.7 s, short: 0.98 s). The call period and timing, estimated through the onset response time, were determined for each male. Males reduced and regularized the period of their calls in response to both stimuli, regardless of their absolute and relative period (i.e., the difference between the male’s period and the stimulus period). Males avoided initiating their calls during ongoing stimuli, but did not time their calls in the silent gap between successive stimuli in ways that reduced the probability of overlap: the proportion of calls without overlap did not depart from random expectations when the silent gap was long, and was smaller than expected when the gap was short. This result indicated that males react to the presence of the virtual competitor but not to its particular characteristics. Fixed responses have been described in other anurans, and often relate to trade-offs between female attraction, male competition, predator attraction, and depletion of energy reserves. Lack of coordination with the stimuli, beyond inhibition of calling during an ongoing stimulus, also indicates somewhat rigid vocal strategies, at least under the experimental conditions. Results from the short period trials suggested a compromise between maintaining a call period and avoiding call overlap. Whether female behavior is influenced by call interference and whether males pay selective attention to distant males instead of to close neighbors must be investigated to better understand the vocal behavior of E. Johnstonei.
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analysis of the vocalizations of Johnstone s whistling frog eleutherodactylus Johnstonei eleutherodactylidae in northern central venezuela
South American Journal of Herpetology, 2008Co-Authors: Zaida Tarano, Eloisa FuenmayorAbstract:Abstract The advertisement call of Eleutherodactylus Johnstonei consists of two adjacent notes (two tones or frequency components). It is, on average, 314 ms in duration, with the first note shorter than the second (86 and 223 ms respectively). The intercall interval is 1.42 s which corresponds to 46,7 calls/min. The dominant frequency of the first note is 1.8 kHz and that of the second note is 3.18 kHz. Both notes contain harmonic series (up to 5 harmonics in the first note and 3 in the second), with narrow bands of constant frequency except for a short and abrupt (38 Hz/ms) upward modulation at the beginning of the second note. Most of the energy of each note is contained in the fundamental band. Spectral characters vary much less than temporal characters, as in other anurans, but variation of spectral characters is amongst the lowest reported so far (~ 1%). There is a weak negative correlation between body mass and the dominant frequency of the call (r = −0.52); therefore call frequency may indicate ma...
Ingo Kowarik - One of the best experts on this subject based on the ideXlab platform.
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non invasive invaders from the caribbean the status of Johnstone s whistling frog eleutherodactylus Johnstonei ten years after its introduction to western french guiana
Biological Invasions, 2011Co-Authors: Raffael Ernst, David Massemin, Ingo KowarikAbstract:The neotropical frog Eleutherodactylus Johnstonei (Anura: Eleutherodactylidae) has been referred to as a highly invasive species on grounds of its wide distribution and is expected to extend its range significantly based on recent climate model assumptions. The frog was introduced to a number of South American mainland localities, including French Guiana. Other species of the genus have become invasive on oceanic islands such as Hawaii where they pose serious biological and economical problems. No data are available on the invasion status of E. Johnstonei populations from coastal South America. Here we present the first assessment of the status of a mainland population from French Guiana 10 years after the introduction of the species. We found that the species has not spread significantly within the last ten years and so far does not exhibit a high invasion potential. Frogs were restricted to urban garden habitats showing significantly higher abundance in gardens containing ornamental potted plants. Distribution patterns were best explained by two dispersal-related factors operating at different scales: (1) distance of occupied sites to nearest population indicating short-distance active dispersal using stepping stone habitats, and (2) distance of occupied sites to shore with a distinct bimodal pattern indicating long-distance passive or jump-dispersal, most likely due to the exchange or transfer of ornamental plants. Even though past and current invasion potential can be considered low, we advocate the implementation of a regional monitoring scheme and detailed studies on biotic interactions with native fauna.
