Reproductive cycle, thyroxine and corticosterone in females of the giant swamp frog Dicroglossus occipitalis at the equator

Kuhn, Er; Gevaerts, Hugo; Jacobs, Griet; Vandorpe, G.

doi:10.1016/0016-6480(87)90358-3

Cited by 18 publications

(4 citation statements)

References 18 publications

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“…The frogs are broadly distributed over West Africa (Lamotte 1967). They are large, with body lengths of 88 ± 18 mm (84 mean, SD, males and females) (Lescure 1971) and a weight of 116.6 ± 3.9 g (121 females) (Kühn et al 1987). Lamotte (1969) characterizes this species as semiaquatic, spending most of the time in the water.…”

Section: Study Animalmentioning

confidence: 99%

Choice of optimal oviposition sites by Hoplobatrachus occipitalis (Anura: Ranidae) in an unpredictable and patchy environment

1997

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The rock pools on the river bank of the Comoé National Park (West Africa) provide a very diverse and unpredictable environment for anuran larval development. Because rock pools differ considerably in biotic and abiotic parameters, it should be adaptive for reproducing anurans to choose the most suitable oviposition sites. During the beginning of each rainy season (March to May), from 1991 to 1995, we investigated the allocation of breeding sites by Hoplobatrachus occipitalis, counted the number of eggs, and measured several biotic and abiotic factors that might influence the choice of a spawning site. The probability of predation by conspecific cannibalistic tadpoles and the water-holding capacity (WHC) of pools were the best predictor of number of eggs laid. We experimentally investigated the influence of these two parameters on egg-laying and showed that adults potentially can assess the presence, density, and size of tadpoles in pools by chemical cues. Likewise, manipulation of the water-holding capacity caused a rapid change in egg-laying behavior. To assess the risk of desiccation, frogs have to visit familiar pools repeatedly to monitor the decrease in volume over time and thus gain information about the pools' water-holding capacity.

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Section: Study Animalmentioning

confidence: 99%

Choice of optimal oviposition sites by Hoplobatrachus occipitalis (Anura: Ranidae) in an unpredictable and patchy environment

1997

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“…[19] reports that Ptychadena mascareniensis breeds during the rainy season. Furthermore, [20] indicate that females of H. occipitalis breed throughout the year in Ecuador. However, this activity according to these authors, is minimal from October to January, the dry season in this region is from December to February.…”

Section: Discussionmentioning

confidence: 99%

Reproduction of African Tigrine Frog Hoplobatrachus occipitalis in Banco National Park (Ivory Coast)

2016

IJSR

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Abstract:The reproduction of Hoplobatrachus occipitalis (Dicroglossidae) was studied in the Banco National Park (BNP) from Ivory Coast. After weighing and dissection of different specimens, male gonads and female gonads are weighed. The eggs of female gonad were counted and measured to the nearest millimeter. The sizes at first sexual maturity in females and males are 124.5 mm and 95 mm respectively. The overall sex ratio evaluated for the BNP is in favor of males (1/2.08). The breeding period of this species is at the early rainy season. The female of this species has heterogeneous gonads, which means fractional oviposition.

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“…Also, Noble (1924) reported this frog feeds on its fellows. According to Kühn et al (1987), all ranidae, insects and fishes are considered as prey of H. occipitalis which lives in water during the day. It leaves the water for hunting at night but in full moon period it stays in water.…”

Section: Food Habitmentioning

confidence: 99%

“…Their croaking is especially tied in reproduction (Wells, 1977;Heyer et al, 1994). Females of H. occipitalis show an annual variation in their reproduction capacity even in constant environmental conditions (photoperiod, temperature, precipitations, humidity) (Kühn et al, 1987). This is especially favoured in ponds near rivers filled up by the firs rain (van den Elzen and Kreulen, 1979).…”

Section: Reproductionmentioning

confidence: 99%

Bibliographic synthesis on biology and ecology of Hoplobatrachus occipitalis (Günther, 1858)

Godome¹,

Tossavi²,

Ouattara³

et al. 2018

Int. J. Bio. Chem. Sci

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Hoplobatrachus occipitalis is a frog belonging to Dicroglossidae family, the most spread in West Africa. This study aimed at performing to bibliographic synthesis on biology and ecology of this species in order to assess its potential in aquaculture. It lives along banks, rocky reservoirs and earthen ponds and prefers savannah areas. It feeds on coleopterans, caterpillars, spiders, vegetal fragments, fishes, crabs, ants, grasshoppers, locusts, dragonflies, frogs, mollusks, lizards, mice, butterflies, wasps and diptera larvae. The growth of H. occipitalis depend on the temperature and pH of the medium. A pH range 6.2 and 7 and temperature equal or upper, than 28 °C are suitable for its growth. H. occipitalis is an oviparous species. Its first sexual maturity height is 124.5 mm for females and 95 mm for males and it often reproduces during rainy season. The rapid growth, resistance and high nutritional quality of this species are some of its important potentialities for aquaculture. Natural reserves of H. occipitalis are overexploited and therefore no more able to satisfy the populations demand. A successful breeding of this species can help not only to preserve and strengthen the natural reserves but to produce regularly bulbous crowfoot for human consumption.

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Reproductive cycle, thyroxine and corticosterone in females of the giant swamp frog Dicroglossus occipitalis at the equator

Cited by 18 publications

References 18 publications

Choice of optimal oviposition sites by Hoplobatrachus occipitalis (Anura: Ranidae) in an unpredictable and patchy environment

Choice of optimal oviposition sites by Hoplobatrachus occipitalis (Anura: Ranidae) in an unpredictable and patchy environment

Reproduction of African Tigrine Frog Hoplobatrachus occipitalis in Banco National Park (Ivory Coast)

Bibliographic synthesis on biology and ecology of Hoplobatrachus occipitalis (Günther, 1858)

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