Structure of the adult ovary and oogenesis inArgulus japonicus thiele (Crustacea: Branchiura)

Ikuta, Kyosuke; Makioka, Toshiki

doi:10.1002/(sici)1097-4687(199701)231:1<29::aid-jmor3>3.0.co;2-j

Cited by 21 publications

(18 citation statements)

References 11 publications

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“…Therefore, according to the present result, it is clear that among the events of oogenesis, only proliferation of the oogonia occurs at the tunica propria or germarium and that the other steps including differentiation, meiosis, maturation, and yolk accumulation of the oocyte occur in the differentiating zone and thereafter enter into either of the lumina, presumably by rupturing the tunica propria bordering it. It is thus evident from the present observation, that the vitellogenic oocytes are not protruding into the extra‐ovarian space like the hemocoelic space as described by Ikuta and Makioka () for A. japonicus . At the postmaturation stage the postvitellogenic oocytes gradually fill the ovarian lumina giving the superficial appearance that the ovary of an engorged specimen is a solid structure.…”

Section: Discussionsupporting

confidence: 76%

Histological and ultrastructural investigation of the female reproductive system of Argulus bengalensisRamakrishna, 1951 (Crustacea: Branchiura)

Banerjee

Saha

2016

Journal of Morphology

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In order to understand branchiuran reproductive biology, it is imperative to know the sites of oogenesis and oocyte maturation, locate the accessory reproductive glands, and identify the fertilization site with the present knowledge of the sperm transfer mechanism of the genus Argulus. With these objectives, we attempted to describe the female reproductive system of Argulus bengalensis using serial histological sections through the ovaries and associated ducts in the transverse, longitudinal, and sagittal planes. The reproductive organs include a median ovary, one pair of ovarian lumina, a median oviduct, and a pair of collateral accessory glands. A duct from each of the collateral accessory glands leads into the proximal part of the median oviduct, which opens to the exterior through a genital opening at the distal end. The glandular secretion presumably contributes to the jelly coat of the egg. The ovary is bound with a tunica propria which extends further diametrically inside the ovary forming the paired lumina. The lumina are confluent into the median oviduct. Two distinct areas, the germarium and differentiating zones, are clearly distinguishable within the ovary. The tunica propria itself houses the oogonia within a matrix, serving as the germarium. Transmission electron micrograph reveals that the matrix is made of collagen. The collagen matrix confers elasticity to the tunica propria to accommodate the postvitellogenic oocytes within the ovarian lumen. The differentiating zone is situated in between the germarium: dorsally it is covered with a chromatophore layer. The ovary is ensheathed by a circum ovarian striated muscle. The presence of spermatophores in the ovarian lumen indicates the fertilization site.

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Section: Discussionsupporting

confidence: 76%

Histological and ultrastructural investigation of the female reproductive system of Argulus bengalensisRamakrishna, 1951 (Crustacea: Branchiura)

Banerjee

Saha

2016

Journal of Morphology

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“…This differentiation has been confirmed in some other arthropod groups, such as the Pycnogonida (Miyazaki and Makioka, 1990, 1992a, the Diplopoda (Yahata and Makioka, 1991, 1997, the Branchiopoda (Ando and Makioka, 1992), and the Branchiura (Ikuta and Makioka, 1995, 1996, 1997a. However, in decapod crustaceans, one of the major mandibulate groups, the ovaries have not been described from the viewpoint that they are of the mandibulate type or the chelicerate type.…”

Section: Introductionmentioning

confidence: 95%

Structure of the Ovary and Mode of Oogenesis in a Freshwater Crayfish, Procambarus clarkii (Girard)

Ando

Makioka

1998

Zoological Science

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The adult ovary was examined in a freshwater crayfish, Procambarus clarkii, to clarify the ovarian structure and the mode of oogenesis. A Y-shaped ovary consisting of a pair of anterior ovarian sacs and a single posterior ovarian sac was located in the cephalothorax, on the dorsal side of the stomach. An oviduct connected each of the posterior ends of the paired anterior ovarian sacs with the genital pore on the coxa of the 6th appendage. The wall of the ovarian sacs, consisting of a layer of the ovarian epithelium, folded inwards to form a number of oogenetic pouches of various sizes. Each oogenetic pouch contained one egg or large oocyte, vitellogenic or previtellogenic, sometimes followed by a few early previtellogenic oocytes in the oogenetic pouch lumen. Germaria containing oogonia, very early previtellogenic oocytes and somatic interstitial cells were located in the ovarian epithelium near the bases of the oogenetic pouches. In a cross-section of the ovarian sac, the germaria were concentrated in the center of the ovarian sac as a central germarial cluster. An early previtellogenic oocyte beginning to grow left its germarium and raised the ovarian epithelium to form a new oogenetic pouch, in which it remained until mature. Mature eggs were ovulated from the oogenetic pouches into the central ovarian lumen, transferred into the oviducts, and oviposited through the genital pores. The female reproductive system was surrounded wholly and tightly by a thin muscular sheath, which has often been mistaken as the ovarian epithelium in some decapod crustaceans.

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“…Probably the most spectacular examples of this phenomenon have been found in velvet worms (Onychophora), in which the degree of the ovarian fusion may vary considerably even within closely related taxa (for further discussion see Mayer and Tait, 2009). In Crustacea, fused ovaries were documented for instance in Branchiura (Kubrakiewicz and Klimowicz, 1994;Ikuta and Makioka, 1997) and Pentastomida (Walldorf and Riehl, 1985), as well as in some Copepoda (Boxshall, 1982;Blades-Eckelbarger and Youngbluth, 1984) and Malacostraca (Adiyodi and Subramoniam, 1983;Makioka, 1998, 1999). As follows from the earlier report by Yager (1991) and data presented in this study, the paired ovaries in Remipedia fuse anteriorly and thus share a common proliferative region, the germarium.…”

Section: Remipede Ovaries Are Paired With a Fused Proliferative Zone mentioning

confidence: 99%

“…In Crustacea, exogenous ovaries with oocytes bulging into the body cavity have been found so far only in Branchiura (Kubrakiewicz and Klimowicz, 1994;Ikuta and Makioka, 1997), Pentastomida (Walldorf and Riehl, 1985) and Ostracoda: Myodocopa (Ikuta and Makioka, 1999a). The typical endogenous ovaries seem to be characteristic for the vast majority of crustaceans, e.g., Copepoda (Blades-Eckelbarger and Youngbluth, 1984), Ostracoda: Podocopa (Ikuta and Makioka, 1999b;Ikuta et al, 2007), Cephalocarida (Hessler et al, 1995), and all malacostracans, e.g., Amphipoda (Zerbib, 1980;Jugan and Zerbib, 1984;Zerbib and Jugan, 1984;Schmitz, 1992), Isopoda (Souty, 1980), and Decapoda (Adiyodi and Subramoniam, 1983;Krol et al, 1992;Makioka, 1998, 1999).…”

Section: Ovary Organizationmentioning

confidence: 99%

“…In exogenous (chelicerate, sensu Makioka, 1988) ovaries, true follicular cells are absent, and the only somatic cells that contact the oocytes are those of the stalks. Such a situation is characteristic for the vast majority of cheliceriformes (Makioka, 1988;Makioka, 1991, 1992;Miyazaki and Bilinski, 2006;Jedrzejowska and Kubrakiewicz, 2007) and myriapods (Tiegs, 1940(Tiegs, , 1947Kubrakiewicz, 1987Kubrakiewicz, , 1991, and for certain groups of crustaceans, i.e., Branchiura (Kubrakiewicz and Klimowicz, 1994;Ikuta and Makioka, 1997), Pentastomida (Walldorf and Riehl, 1985), and Ostracoda: Myodocopa (Ikuta and Makioka, 1999a). In contrast, in endogenous ovaries (mandibulate, sensu Makioka, 1988), oocytes are associated with single follicular cells or are surrounded by a canonical follicular epithelium.…”

Section: Relationships Between Germline and Somatic Cellsmentioning

confidence: 99%

See 1 more Smart Citation

Ovary structure and early oogenesis in the remipede, Godzilliognomus frondosus (Crustacea, Remipedia): phylogenetic implications

Kubrakiewicz

Jaglarz

Iliffe

et al. 2012

Zoology

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Structure of the adult ovary and oogenesis inArgulus japonicus thiele (Crustacea: Branchiura)

Cited by 21 publications

References 11 publications

Histological and ultrastructural investigation of the female reproductive system of Argulus bengalensisRamakrishna, 1951 (Crustacea: Branchiura)

Histological and ultrastructural investigation of the female reproductive system of Argulus bengalensisRamakrishna, 1951 (Crustacea: Branchiura)

Structure of the Ovary and Mode of Oogenesis in a Freshwater Crayfish, Procambarus clarkii (Girard)

Ovary structure and early oogenesis in the remipede, Godzilliognomus frondosus (Crustacea, Remipedia): phylogenetic implications

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