Abiotic correlates of temporal variation of Hypsiboas leptolineatus (Amphibia: Hylidae)

Hiert, Cristiane; Moura, Maurício Osvaldo

doi:10.1590/s1984-46702010000500006

“…Frogs were not marked and so many of the same individuals were counted every time, but this possible bias should be accounted for in the data analysis ( Wells, 2007 ). These data were adjusted by a quadratic transformation to achieve normality according to that described by Hiert & Moura (2010) and Zar (1984) .…”

Section: Discussionmentioning

confidence: 99%

“…Interpreting the effect of environmental changes on population dynamics is necessary to identify temporal and spatial variations of population parameters ( Coulson et al, 2001 ). Obtaining this information is important in planning and evaluating population studies ( Hiert & Moura, 2010 ; Gillespie, 2011 ), and for the maintenance and conservation of amphibian populations. For example, knowing the temporal activity pattern of a species is useful for determining optimal times to conduct studies, population inventories, and maintenance and conservation activities.…”

Section: Introductionmentioning

confidence: 99%

Temporal stability of an endemic Mexican treefrog

Cruz-Ruiz

¹

,

Venegas-Barrera

²

,

Sánchez-Sánchez

³

et al. 2015

PeerJ

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The demographic characteristics of an amphibian population fluctuate independently over time, mainly in response to the temporal variation of environmental factors, especially precipitation and temperature. These temporal fluctuations may contribute to the size of an amphibian population and could be used to determine the current conservation status of a species. During a five year (2004–2008) period, we studied the relative abundance, sex ratio, and age-sex structure of a population of metamorphosed individuals of the endemic treefrog Hyla eximia in Central Mexico. We also studied the species’ relationship with climatic variables such as temperature and precipitation. We found an interannual constant abundance during the study period. However, interannual differences were observed in the population structure by age-sex category (males, females, or juveniles), with decreased abundance of males and juveniles during the rainy months (August–November). The annual abundance of H. eximia was positively correlated with rainfall, but negatively with monthly temperature. We found the sex ratio was male-biased (2:1), except for year 2008. Also, differences in snout-vent length (SVL) were found between years, suggesting changes in recruitment of new individuals. We conclude that variations in abundance, and frequencies by age-sex category, of H. eximia are related to seasonal variations in temperature and precipitation characteristics of temperate zones. However, this temporal stability may suggest that anurans have an unusual capacity to persist even in the face of human-induced habitat change.

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“…The monthly abundance of frogs was obtained by adding up the number of individuals viewed per month in the pond. These data were adjusted by a quadratic transformation according to that described by Hiert & Moura (2010) and Zar (1984).…”

Section: Discussionmentioning

confidence: 99%

“…Obtaining this information is important in planning and evaluating population studies (Hiert & Moura, 2010;Gillespie, 2011), and for the maintenance and conservation of amphibian populations. For example, knowing the temporal pattern of activity of a species is useful for determining optimal times to conduct studies and population inventories.…”

Section: Introductionmentioning

confidence: 99%

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Supplemental Information 1: Treeforg Collected During Five Year in a Population at Central Mexico

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The demographic characteristics of an amphibian population fluctuate independently over time, mainly in response to the temporal variation of environmental factors, especially precipitation and temperature. These temporal fluctuations may contribute to the effective size of an amphibian population and could be used to inform the current conservation status of a species. During a five year (2004-2008) period, we studied the relative abundance, sex ratio, and size-age structure of a population of metamorphosed individuals of the endemic treefrog Hyla eximia in Central Mexico. We also studied the species' relationship with climatic variables such as temperatura and precipitation. We found an interannual constant abundance during the study period. However, interannual differences were observed in the population structure by age-sex category (males, females, or juveniles), with increased abundance of juveniles during the rainy months (August-November). The annual abundance of H. eximia was positively correlated with rainfall, but negatively with monthly temperature. We found the sex ratio was male-biased (2:1) except for year 2008. Also, differences in snout-vent length (SVL) were found between years, suggesting changes in recruitment of new individuals. We conclude that variations in abundance, and frequencies by age-sex category, of H. eximia are related to seasonal variations in temperature and precipitation characteristics of temperate zones. However, this temporal stability may suggest that anurans have an unusual capacity to persist even in the face of human-induced habitat change.

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“…These data were adjusted by a quadratic transformation according 130 to that described by Hiert & Moura (2010) and Zar (1984). 131 Temporal changes in the population structure were estimated by correspondence analysis, 132 which is a multivariate statistical test that creates fewer dimensions of the association between 133 two categorical variables (Gotelli & Ellison 2004).…”

mentioning

confidence: 99%

Untitled

Supplemental Information 1: Treeforg Collected During Five Year in a Population at Central Mexico

0

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The demographic characteristics of an amphibian population fluctuate independently over time, mainly in response to the temporal variation of environmental factors, especially precipitation and temperature. These temporal fluctuations may contribute to the effective size of an amphibian population and could be used to inform the current conservation status of a species. During a five year (2004)(2005)(2006)(2007)(2008) period, we studied the relative abundance, sex ratio, and size-age structure of a population of metamorphosed individuals of the endemic treefrog Hyla eximia in Central Mexico. We also studied the species' relationship with climatic variables such as temperatura and precipitation. We found an interannual constant abundance during the study period. However, interannual differences were observed in the population structure by age-sex category (males, females, or juveniles), with increased abundance of juveniles during the rainy months (AugustNovember). The annual abundance of H. eximia was positively correlated with rainfall, but negatively with monthly temperature. We found the sex ratio was male-biased (2:1) except for year 2008. Also, differences in snout-vent length (SVL) were found between years, suggesting changes in recruitment of new individuals. We conclude that variations in abundance, and frequencies by age-sex category, of H. eximia are related to seasonal variations in temperature and precipitation characteristics of temperate zones. However, this temporal stability may suggest that anurans have an unusual capacity to persist even Temporal stability of an endemic Mexican treefrog2 The demographic characteristics of an amphibian population fluctuate independently over time, 3 mainly in response to the temporal variation of environmental factors, especially precipitation 4 and temperature. These temporal fluctuations may contribute to the effective size of an 5 amphibian population and could be used to inform the current conservation status of a species. 6 During a five year (2004)(2005)(2006)(2007)(2008) period, we studied the relative abundance, sex ratio, and size-age 7 structure of a population of metamorphosed individuals of the endemic treefrog Hyla eximia in 8 Central Mexico. We also studied the species' relationship with climatic variables such as 9 temperature and precipitation. We found an interannual constant abundance during the study 10 period. However, interannual differences were observed in the population structure by age-sex 11 category (males, females, or juveniles), with increased abundance of juveniles during the rainy 12 months (August-November). The annual abundance of H. eximia was positively correlated with 13 rainfall, but negatively with monthly temperature. We found the sex ratio was male-biased (2:1) 14 except for year 2008. Also, differences in snout-vent length (SVL) were found between years, 15 suggesting changes in recruitment of new individuals. We conclude that variations in abundance, 16 and frequencies by age-sex category, of H. eximia are related...

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Abiotic correlates of temporal variation of Hypsiboas leptolineatus (Amphibia: Hylidae)

Cited by 9 publications

References 14 publications

Temporal stability of an endemic Mexican treefrog

Temporal stability of an endemic Mexican treefrog

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