Allometry of Reproduction in Wild Broad-Snouted Caimans (Caiman latirostris)

Larriera, Alejandro; Piña, Carlos Ignácio; Siroski, Pablo Ariel; Verdade, Luciano Martins

doi:10.1670/145-03a

Cited by 41 publications

(43 citation statements)

References 5 publications

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“…Previous studies did not detect this relationship measuring egg volume in C. latirostris and in a related species (Caiman yacare; Campos and Magnusson 1995). Larriera et al (2004) did not find a significant relationship between clutch size and egg mass after removing female BM or SVL effects. So female body size may be the factor that connects clutch size and egg width or hatchling BM.…”

Section: Discussionmentioning

confidence: 65%

“…Although we did not capture nesting females in this study, egg width is positively related to female body size in Caiman latirostris (Larriera et al 2004). Females nesting in the forest are possibly bigger than those nesting in savanna since they produce wider eggs.…”

Section: Discussionmentioning

confidence: 80%

“…Clutch size is related to female size, as is hatchling size (Larriera et al 2004). Thus, sizes of eggs, clutches and hatchlings from different nesting habitats may be used to infer the size of female selecting these habitats.…”

Section: Introductionmentioning

confidence: 99%

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The relationship between nesting habitat and hatching success in Caiman latirostris (Crocodylia, Alligatoridae)

Montini¹,

Piña

Larriera

et al. 2006

Phyllomedusa

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The relationship between nesting habitat and hatching success in Caiman latirostris (Crocodylia, Alligatoridae). The Broad-snouted Caiman uses different habitats for nesting; it has temperature-dependent sex determination (TSD) and nesting habitat selection by females could affect sex and other hatchlings characteristics. Here we evaluated reproductive parameters in three nesting habitats: forest, savanna, and floating vegetation. We collected 154 caiman nests during the summer of 2001-2002. Since natural incubation could mask possible clutch-effects, eggs were collected soon after oviposition and artificially incubated. We found that eggs laid in the forest were wider than those laid in savanna, hatching success varied, decreasing from floating vegetation to forest. As egg width is positively correlated to female body size, the present results suggest that female body size could be related to nesting habitat use in Caiman latirostris. However, there were no differences in hatchling size among nesting habitats.

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Section: Discussionmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 80%

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The relationship between nesting habitat and hatching success in Caiman latirostris (Crocodylia, Alligatoridae)

Montini¹,

Piña

Larriera

et al. 2006

Phyllomedusa

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“…Although there are studies on life history parameters of Broad-snouted Caiman, such as sexual dimorphism, sexual maturity, and clutch size (Verdade, 2000(Verdade, , 2001Larriera et al, 2004Larriera et al, , 2006Simoncini et al, 2009), more information is needed on certain life history traits to develop informed and effective management strategies. For example, knowledge of sexual maturity, particularly the minimum size at which females become reproductively active, is important for understanding caiman population structure and dynamics .…”

Section: Introductionmentioning

confidence: 99%

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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“…Apesar disso, não foram encontradas relações entre o tamanho corpóreo da fêmea e a massa relativa da ninhada (P>0,05), que seria traduzida como a energia investida na reprodução. Isso indica que não existe uma diferença no investimento energético entre fêmeas de diferentes classes de tamanho (ou idades), ao contrário do que foi observado por para P. expansa e em algumas espécies de crocodilianos (THORBJARNARSON; HERNÁNDEZ, 1993;LARRIERA et al, 2004;VERDADE, 2001).…”

Section: Discussionunclassified

Estrutura populacional e alometria reprodutiva de Podocnemis expansa (Testudines, Podocnemididae) no entorno do Parque Nacional do Araguaia, Tocantins

Portelinha¹

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Allometry of Reproduction in Wild Broad-Snouted Caimans (Caiman latirostris)

Cited by 41 publications

References 5 publications

The relationship between nesting habitat and hatching success in Caiman latirostris (Crocodylia, Alligatoridae)

The relationship between nesting habitat and hatching success in Caiman latirostris (Crocodylia, Alligatoridae)

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

Estrutura populacional e alometria reprodutiva de Podocnemis expansa (Testudines, Podocnemididae) no entorno do Parque Nacional do Araguaia, Tocantins

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