Aspectos Ecológicos da Reprodução de Hypsiboas Faber (Anura, Hylidae) na Enseada de Sítio Forte, Ilha Grande, Angra dos Reis, Brasil
There are several anuran Ls reproductive modes and even among the related species, there are slight differences in the larvae development. Were propose to analyze the nest distribution of Hypsiboas faber, in insular environment, as well as evaluate the structural and ecological aspects. Were calcula...
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Veröffentlicht in: | Comunicata Scientiae 2013, Vol.4 (2), p.195-202 |
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Zusammenfassung: | There are several anuran Ls reproductive modes and even among the related species, there are
slight differences in the larvae development. Were propose to analyze the nest distribution of
Hypsiboas faber, in insular environment, as well as evaluate the structural and ecological aspects.
Were calculated the nest area correlating to the number of eggs, adjusting the variables to the
univariate straight-line equation, being the model tested through Ô2. The density of nest distribution
was also evaluated, besides the abiotic data, such as dissolved oxygen, pH and nitrite. It was
observed the fidelity to the reproductive area during three years consecutives until the complete
destruction of the place to real state use. The species had used an area of 11.28 m2, of which the
center was occupied by a permanent puddle of 4 m2 in the outer dune. In the first sample period, it
was found 23 nests, in the following period 15 and in the last period just 9 nests. Beyond the number
of nests, were also observed the reduction of the area of the built nest from 0.30 m2 to 0.18 m2, being
this decline probably related to the human occupation, culminating with the complete elimination
of the reproductive area.
Varios sao os modos reprodutivos dos anuros e mesmo entre especies proximamente relacionadas
ha diferencas sutis no desenvolvimento de suas larvas. Propoe-se aqui analisar a distribuicao de
ninhos de Hypsiboas faber, em ambiente insular, bem como avaliar seus aspectos estruturais e
ecologicos. Calculou-se a area dos ninhos correlacionando-a com o numero de ovos, ajustando
as variaveis a equacao de reta univariada, sendo o modelo testado atraves do Ô2. A densidade de
distribuicao dos ninhos tambem foi avaliada, alem de dados abioticos como oxigenio dissolvido, pH
e nitrito. Observou-se a fidelidade ao sitio reprodutivo por tres anos consecutivos ate a destruicao
completa do local para uso imobiliario. A especie usava uma area de 11,28 m2 cujo centro era
ocupado por uma poca permanente de 4 m2 na regiao de antedunas. No primeiro periodo
amostral encontrou-se 23 ninhos, no periodo seguinte 15 e no ultimo apenas 9 ninhos. Alem do
numero de ninhos, observou-se tambem uma diminuicao da area do ninho construido de 0,30 m2
para 0,18 m2 sendo este declinio provavelmente relacionado a ocupacao humana, culminando
com a completa eliminacao do sitio de reproducao. |
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ISSN: | 2177-5133 2177-5133 |