Hormone Levels and Ultrasound Evaluation of<i>Caiman latirostris</i>(Crocodylia, Alligatoridae) Ovulation

Portelinha, Thiago Costa Gonçalves; Jahn, Graciela A.; Hapon, María Belén; Verdade, Luciano Martins; Piña, Carlos Ignácio

doi:10.2994/sajh-d-14-00030.1

Cited by 15 publications

(17 citation statements)

References 28 publications

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“…Reintroduced females in this data set were 9-10 years old. More recently, in the same region, wild females <71 cm SVL and 10.5 kg were observed nesting (Portelinha et al, 2015). Therefore, in this work we test the hypothesis that size ranges of breeding females of C. latirostris exceed the minimum and maximum limits of class III established for C. yacare by Ross and Godshalk (2003).…”

Section: Introductionmentioning

confidence: 83%

“…Broad-snouted Caiman were reintroduced into wild populations in study sites: Espín, Fisco, Los Saladillos and Lucero ( Figure 1); as part of "Proyecto Yacaré" caiman management and conservation initiative. Caimans were released with an individual mark by notching tail scutes indicating release year, so age could be determined if they were recaptured Portelinha et al, 2015). The climate of the region is temperate, with a mean minimum annual temperature of 14.9 °C and maximum of 25.6 °C and an annual rainfall of 1.380 mm (information available in the web site of National Meteorological Service (SMN, 2017).…”

Section: Methodsmentioning

confidence: 99%

“…Females were caught at their nests in the wild with a steel cable noose and immobilized manually, then sexed by cloacal palpation (Verdade, 1997;Portelinha et al, 2015). We assumed that a female caiman attending a nest was the maternal parent of the clutch in that nest (Amavet et al, 2008).…”

Section: Methodsmentioning

confidence: 99%

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Size of nesting female Broad-snouted Caimans (Caiman latirostris Daudin 1802)

Leiva

Simoncini

Portelinha³

et al. 2019

Braz. J. Biol.

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The southern distribution of the Broad-snouted Caiman (Caiman latirostris Daudin 1802) in Argentina occurs in Santa Fe Province, where its population has been under management by "Proyecto Yacaré" since 1990. From 1997 to 2016, we captured 77 nesting female Broad-snouted Caimans in Santa Fe Province. Our results suggest that previously defined size classes for Broad-snouted Caiman do not adequately describe the reproductively mature female segment of the population. Here we propose to change size ranges for general size classes for Broad-snouted Caiman. In addition, we have observed that reintroduced reproductive females by Proyecto Yacaré represent about 32% of captured females. These results indicate that reintroduced females by the management program are surviving and reproducing in the wild at least up to 20 years.Keywords: management, size class, reproduction, sexual maturity. Tamanho de fêmeas nidificantes do jacaré-de-papo-amarelo (Caiman latirostris Daudin 1802)Resumo Na Argentina, a distribuição mais austral do jacaré-de-papo-amarelo (Caiman latirostris Daudin 1802) ocorre na Provincia de Santa Fe, sendo que suas populações são manejadas pelo "Proyecto Yacaré" desde 1990. Entre os anos de 1997 e 2016, nós capturamos 77 fêmeas nidificantes do jacaré-de-papo-amarelo em Santa Fe. Nossos resultados sugerem que as classes de tamanho definidas para o jacaré-de-papo-amarelo não representam a realidade dos animais capturados no presente estudo. Portanto, propõe-se uma alteração nas classes de tamanho para o jacaré-de-papo-amarelo. Nós também observamos que as fêmeas reintroduzidas pelo "Proyecto Yacaré" representaram 32% das fêmeas capturadas. Estes resultados indicam que fêmeas reintroduzidas pelo programa de manejo estão sobrevivendo e reproduzindo na natureza por, pelo menos, 20 anos.Palavras-chave: manejo, classe de tamanho, reprodução, maturidade sexual.

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Section: Introductionmentioning

confidence: 83%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Size of nesting female Broad-snouted Caimans (Caiman latirostris Daudin 1802)

Leiva

Simoncini

Portelinha³

et al. 2019

Braz. J. Biol.

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“…Growth dynamics of crocodilians are influenced more by the age at which first reproduction occurs than by the asymptotic size (Brisbin, 1988). Minimum reported reproductive size is 68 cm SVL for wild females (Portelinha et al, 2015) and 69 cm for reintroduced females , the latter at 7.9 years old. Using our model, we can estimate the minimum reproductive age as 8.1 ± 1.8 years, similar to that found by Moulton et al (1999) in Brazil, where caimans would begin to reproduce at 75 cm, age 8.6 years.…”

Section: Discussionmentioning

confidence: 96%

Growth Curves of Wild and Reintroduced Broad-Snouted Caimans (Caiman latirostris) and Their Management Implications

Viotto

Navarro

Piña

2020

South American Journal of Herpetology

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“…Crocodilians are ectothermic vertebrates that depend on external temperature for thermoregulation (Pough et al, 2003), and their thermoregulatory behavior involves different uses of the available environments to reach the body temperature for their metabolic activities (Fincatti and Verdade, 2002;Seebacher and Franklin, 2005). The thermoregulatory behavior of Caiman latirostris varies throughout the year in order to avoid extreme temperatures, which affects its use of space (Fincatti and Verdade, 2002;Bassetti et al, 2005;.…”

Section: Sampling Methodologymentioning

confidence: 99%