Describing gonad development and gametogenesis in southern Africa’s endemic box jellyfish <i>Carybdea branchi</i> (Cubozoa, Carybdeidae)

Mohamed, Riaaz; Skrypzeck, H.; Gibbons, M. J.

doi:10.2989/1814232x.2019.1575282

Cited by 3 publications

(13 citation statements)

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“…The bell height (BH, from the apex of the umbrella to the margin) and interpedalial distance (IPD, distance along the bell margin between alternate pedalia) were measured for all specimens (cf. [45,55]) (Figure 1A) (Table 1). All necessary approvals for the sampling of specimens were obtained (sampling permit 16802 SISBIO/ICMBIO-Instituto Chico Mendes de Conservação da Biodiversidade).…”

Section: Materials Samplesmentioning

confidence: 99%

“…Sexual maturity was inferred by the presence of more than 15% of gonadal oocytes in the late vitellogenic stage (O iii ) (cf. [45,56]). We propose a maturity scale for the different oocyte developmental states observed in our samples, following the scale proposed for Carybdea murrayana (as Carybdea branchi [45]), based on oocyte diameter and quantity of yolk.…”

Section: Maturity Of Specimensmentioning

confidence: 99%

“…[45,56]). We propose a maturity scale for the different oocyte developmental states observed in our samples, following the scale proposed for Carybdea murrayana (as Carybdea branchi [45]), based on oocyte diameter and quantity of yolk.…”

Section: Maturity Of Specimensmentioning

confidence: 99%

“…Recent histomorphological studies have elucidated spermatogenesis in several species of cubomedusae [19,20], but studies concerning oogenesis are limited to C. marsupialis [13] and C. sivickisi (as Carybdea sivickisi [15,17]). Most recently, oogenesis was reported in Carybdea murrayana Haeckel, 1880 (as Carybdea branchi [45]) from southern African waters, and a "maturation scale" for female sex cells was established for the first time in the class. During the process of vitellogenesis, oocytes accumulate yolk protein granules and subsequently increase in diameter.…”

Section: Introductionmentioning

confidence: 99%

“…Oocyte maturation patterns corresponded to significant egg size differences documented during the oogenesis of a single cubozoan species, viz. C. murrayana [45]. Nevertheless, scarce information on egg size and its relation to cubomedusae maturity precludes the ability to establish a baseline of sexual maturation related to reproductive season for the 50 estimated species.…”

Section: Introductionmentioning

confidence: 99%

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Histological Investigation of the Female Gonads of Chiropsalmus quadrumanus (Cubozoa: Cnidaria) Suggests Iteroparous Reproduction

et al. 2023

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The box jellyfish Chiropsalmus quadrumanus (Chirodropida: Cubozoa: Cnidaria) is common in warm waters. Although it is assumed that external fertilization is a characteristic of Chirodropida, the life history of C. quadrumanus is not yet known since its reproductive behavior has never been described, nor has the polyp has been found in nature. As a result, in the absence of documentation of reproductive behavior, we sought to test the hypothesis of external fertilization through a histological analysis of the female gonads. Herein, we analyze ten females collected in São Paulo and Rio de Janeiro (Brazil) and describe the gonadal organization and pattern of oocyte development. The discovery of four distinct stages of oocyte differentiation augments the scant existing reports of the structural and functional maturation of sex cells in Cubozoa species. Furthermore, the gonads of mature females comprise both mature (average diameter of 122 µm) and immature oocytes, suggesting that C. quadrumanus is iteroparous and exhibits multiple reproductive cycles during its life. Medusa bell size was not found to correlate with maturity state as even small females possessed a high percentage of oocytes in late vitellogenesis, suggesting that sexual maturation occurs rapidly in C. quadrumanus females.

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Section: Materials Samplesmentioning

confidence: 99%