Reproductive biology of Leptodactylus fuscus (Anura, Leptodactylidae) in the subtropical climate, Rio Grande do Sul, Brazil

Maragno, Franciele Pereira; Cechin, Sônia Zanini

doi:10.1590/s0073-47212009000300002

Cited by 11 publications

(5 citation statements)

References 17 publications

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“…In our findings, the cell characteristics of L. Macrosternum, and the process of spermatogenesis, with variation in the quantities of cysts and especially the spermatozoa within the locules, are similar to L. podicipinus (Prado et al 2002), L. chaquensis and L. podicipinus (Ferreira et al 2009), Leptodactylus fuscus (Schneider, 1799) (Maragno and Cechin 2009) and L. chaquensis (Villagra et al 2014), demonstrating an organizational pattern of germ cells dependent on the seasonal variation of each region.…”

Section: Discussionsupporting

confidence: 70%

Influence of rainfall and temperature on the spermatogenesis of Leptodactylus macrosternum (Anura: Leptodactylidae)

Chaves¹,

Moura²,

Tenório³

et al. 2017

Zoologia

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In the semi-arid environment, the reproductive success of anurans depends on adaptations in their life cycle, which synchronizes with ideal environmental conditions to maximize the number of offspring. In this study changes in the histological and morphometric aspects of the testes of Leptodactylus macrosternum Miranda-Ribeiro, 1926 are characterized, to evaluate the influence of rainfall and temperature on them. Specimens were collected at Horto Florestal Olho d'Água da Bica-HFOB (06°49'20"S, 36°15'85"W) area, municipality of Cuité, state of Paraíba, Brazil. Search for specimens was active, happened at night, and amounted to 15 days from January to December 2013. The densities of spermatids (primary and secondary), sperm and area of the seminiferous locules of the testes were registered. The influence of climate variables (rainfall and temperature) on the density of primary and secondary spermatids, sperm and locular area were verified using Simple Linear Regression. Primary spermatids had the lowest density in July (57.90 ± 51.54 mm 2), with a peak in November (300.32 ± 117.35 mm 2); secondary spermatids had the lowest density in December (287.87 ± 79.05 mm 2), with a peak in May (135,727.00 ± 301.13 mm 2); sperm was in the lowest density in July (237.37 ± 121.10 mm 2), with a peak in June (2,270.45 ± 602.62 mm 2) and the locular area had the lowest density in December (40,292.9 ± 8,174.20 µm 2) and highest density in June (338,875.01 ± 2,262.10 µm 2). A notable decrease in sperm density was evident between June and July. That, associated with the observation of a larger locular area in June, allowed us to identify as June as the peak of spermatogenesis and the following month as the most potentially reproductive. The density of secondary spermatids(r = 0.02), sperm (r = 0.21) and locular area (r = 0.01) showed dependency on rainfall whereas only sperm (r = 0.09) showed dependency on temperature. Therefore, we can state that the reproductive cycle of L. macrosternum is potentially continuous, with a reproductive peak in July.

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Section: Discussionsupporting

confidence: 70%

Influence of rainfall and temperature on the spermatogenesis of Leptodactylus macrosternum (Anura: Leptodactylidae)

Chaves¹,

Moura²,

Tenório³

et al. 2017

Zoologia

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“…This difference may be caused by regional differences on microhabitats and microclimate or even by the explosive reproductive behaviour of these species (Arzabe, 1999;Vieira et al, 2009;Wells, 2007). All species in this study are widely distributed, even throughout other biomes, although some species, such as H. raniceps, S. x-signatus and L. macrosternum, may represent species complexes (Caldwell and Araújo, 2005;Frost, 2010;Maragno and Cechin, 2009).…”

Section: Species Compositionmentioning

confidence: 86%

Structure of a Caatinga anuran assemblage in Northeastern Brazil

Filho

Vieira

Santana

et al. 2015

Neotropical Biology and Conservation

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Based on data on diet and microhabitat use, we investigated the importance of current (ecological) and historical factors (phylogenetic) in the organization of an anuran assemblage in temporary ponds in a Caatinga area in Northeastern Brazil. The objective of this study was to verify how diet and microhabitat use influence the community structure, and their determinants. Niche breadth based on microhabitat use was relatively low for all species; thus, we also observed a spatial segregation between Hylidae and other families. The closely related species exhibit a more similar diet; the main prey categories used by Caatinga anurans were Coleoptera, insect larvae and Formicidae. The pseudo-community analysis based on diet and microhabitat use revealed that the observed niche overlap did not differ statistically from random, indicating a lack of detectable competition for these resources. The Canonical Phylogenetic Ordination (CPO) analyses revealed no significant phylogenetic effect on the assemblage, neither for diet nor for microhabitat use. Results suggest that predation and hydroperiod may be the most important factors in determining assemblage patterns, but more studies are needed to support this hypothesis.

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“… Comparisons of anuran breeding seasons as reported in the literature showing the contrast between the year‐round cycle and others (the study species is underlined). Sources: Bernarde & Kokubum, ; Guimarães et al ., ; De‐Carvalho et al ., ; Muniz et al ., ; Kokubum & Giaretta, ; Prado & Uetanabaro, ; Rodrigues et al ., ; Brasileiro & Martins, ; Toledo & Haddad, ; Lucas et al ., ; Zina & Haddad, ; Abrunhosa & Wogel, ; Martins, ; Van Sluys et al ., ; Giasson & Haddad, ; Hartmann et al ., ; Miranda et al ., ; Lima et al ., ; Maragno & Cechin, ; Melchiors et al ., . …”

Section: Discussionmentioning

confidence: 99%

Constant breeding and low survival rates in the subtropical Striped Frog in southern Brazil

2012

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Survival and consequent implications for population dynamics in the subtropical Striped Frog Hypsiboas leptolineatus was studied for 1 year in the southern Brazilian state of Paraná. By means of capture‐marking‐recapture, we estimated survival and capture probabilities in an open population. A total of 583 captures of 374 individuals, comprising 96% male (n = 353) and 4% females (n = 21), resulted in daily survival estimates ranging from 0.808 to 0.998 day−1. The number of individuals captured per capture session varied from 8 to 37 (mean = 21) and was correlated with night length, after a two session lag time (r = 0.78). Males were found vocalizing throughout the year, while females were less common and gravid females were only found in November, March and June. Recapture probability was relatively constant at 25% for males, 24% for females and, overall, 29% of males were recaptured at least once. Young individuals were encountered in all months but one and, being extremely small, were impossible to quantify. Thus, the Striped Frog is active and breeding year‐round as indicated by the constant singing of adult males, the few gravid females found at different times and the frequent encounters of young frogs at all times of year. While survival and captures varied throughout the year, the only seasonality was in the number of captures that increased during longer nights. Nonetheless, recapture probability was constant. These dynamics contrast strongly with most anuran species and especially subtropical and temperate species in other places. This first detailed study of population parameters of a subtropical species with its unusual dynamics may suggest that once studied, other species of anurans may also have surprising population dynamics.

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Reproductive biology of Leptodactylus fuscus (Anura, Leptodactylidae) in the subtropical climate, Rio Grande do Sul, Brazil

Cited by 11 publications

References 17 publications

Influence of rainfall and temperature on the spermatogenesis of Leptodactylus macrosternum (Anura: Leptodactylidae)

Influence of rainfall and temperature on the spermatogenesis of Leptodactylus macrosternum (Anura: Leptodactylidae)

Structure of a Caatinga anuran assemblage in Northeastern Brazil

Constant breeding and low survival rates in the subtropical Striped Frog in southern Brazil

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