Induced Ovarian Maturation of <i>Penaeus vannamei</i> by Implantation of Lobster Ganglion

Yano, Isao; Tsukimura, Brian; Sweeney, James N.; Wyban, James A.

doi:10.1111/j.1749-7345.1988.tb00781.x

Cited by 59 publications

(44 citation statements)

References 17 publications

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“…In the crab U. pugilator, GSF production fluctuates depending on the stage of the annual reproductive cycle (EastmanReks and Fingerman, 1984). Yano and Wyban (Yano and Wyban, 1992) reported that, in a small number of cases, implants of the TG of H. americanus into non-reproductive L. vannamei resulted in the stimulation of ovarian maturation. Injections of aqueous extracts prepared from TG and brain as well as in vitro incubation experiments have shown that vitellogenesis can be stimulated by TG extract (Yano and Wyban, 1992).…”

Section: Role Of Gsfs In Crustacean Reproductionmentioning

confidence: 99%

“…Yano and Wyban (Yano and Wyban, 1992) reported that, in a small number of cases, implants of the TG of H. americanus into non-reproductive L. vannamei resulted in the stimulation of ovarian maturation. Injections of aqueous extracts prepared from TG and brain as well as in vitro incubation experiments have shown that vitellogenesis can be stimulated by TG extract (Yano and Wyban, 1992). Evidence for GIH seems well established through classical endocrine procedures, but sufficiency studies with the GSF from TG of the central nervous system are lacking, probably because of the difficulty with surgery.…”

Section: Role Of Gsfs In Crustacean Reproductionmentioning

confidence: 99%

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Reproductive regulators in decapod crustaceans: an overview

Nagaraju

2011

Journal of Experimental Biology

271

170

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SummaryControl of reproductive development in crustaceans requires neuropeptides, ecdysone and methyl farnesoate (MF). A major source of neuropeptides is the X-organ-sinus gland (XO-SG) complex located in the eyestalk ganglia of crustaceans. The other regulatory factors (either peptides or neuromodulators) are produced in the brain and thoracic ganglia (TG). Two other regulatory non-peptide compounds, the steroid ecdysone and the sesquiterpene MF, are produced by the Y-organs and the mandibular organs, respectively. In the current review, I have tried to recapitulate recent studies on the role of gonadal regulatory factors in regulating crustacean reproduction.Key words: crustaceans, reproduction, gonads, X-organ-sinus gland, peptides. THE JOURNAL OF EXPERIMENTAL BIOLOGY4 crustaceans, the testis contains 10-15 lobes each composed of many seminiferous tubules, whose shape changes according to the stage of spermatogenesis. Spermatogenesis starts in the undifferentiated seminiferous tubules (proacini) at the top of each lobe. Meiotic activity occurs in the acini that develop proacini somewhat proximally from the top of each lobe. In this stage, the lobules contain mostly primary spermatocytes. Differentiation of secondary spermatocytes and spermatids takes place in the seminiferous tubules, which lie in the center of each lobe. All these seminiferous tubules are filled with spermatocytes and spermatids surrounded by a layer of otheocytes of mesodermal origin. The hormonal control of spermatogenesis is not completely understood in crustaceans. There is information on MF as a reproductive hormone in males. The female reproductive systemThe reproductive system of female crustaceans consists of the paired ovaries, oviducts, gonophores and an external sperm reception area. The ovarian lobes are connected by a central bridge of ovarian tissue (Fig.1D). The ovarian lobes are symmetrically arranged and lie in the cephalothorax on the top of the stomach and hepatopancreas (HP). An oviduct arises laterally from each ovary at a point just beside the position of the heart. It extends ventrally and opens through a gonophore in the abdomen. In sexually receptive females, each pore is equipped with a large tuft of long setae, which apparently serve as a tube for the passage of ova. In the fully mature state, the shapes of ovarian limbs can be distinguished only with difficulty as the ovary fills the thoracic region of the body cavity completely.In the majority of female Malacostraca, oogonial proliferation and ovarian differentiation take place when the ovary is translucent to opaque white (previtellogenic ovary). During vitellogenesis the color of the ovary changes from pale yellow (vitellogenic stage I) to orange (vitellogenic stage II) and it then becomes brown (vitellogenic stage III) to dark brown prior to spawning. Maturation of the ovary also includes an increase in the size of the ovary as the oocytes proliferate and increase in diameter, due to yolk deposition. Role of neuropeptides in reproductionThe hormonal control o...

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Section: Role Of Gsfs In Crustacean Reproductionmentioning

confidence: 99%

Section: Role Of Gsfs In Crustacean Reproductionmentioning

confidence: 99%

Reproductive regulators in decapod crustaceans: an overview

Nagaraju

2011

Journal of Experimental Biology

271

170

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“…Similar results were obtained in implantation experiments in the whiteleg shrimp, Li. vannamei (Yano 1988 and Wyban 1992), and crab, Potamon koolooense (Joshi 1989). At this time, the putative VSH could not be fully chemically characterized, but appeared to be a 10 kDa peptide that is inactivated by trypsin (Yano 1998).…”

Section: -1cmentioning

confidence: 99%

Reproductive Mechanisms in Crustacea Focusing on Selected Prawn Species: Vitellogenin Structure, Processing and Synthetic Control

Wilder¹,

Okumura²,

Tsutsui³

2010

Aqua-BioSci. Monogr. (ABSM)

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Shrimp culture is a significant world-wide industry, with current production levels reaching over 3 million tons per year. The expansion of the industry has given rise to the problems of environmental deterioration due to intensive-scale culture, and the outbreak of disease. While many of these issues are now being sufficiently addressed, the establishment of sustainable seed production technology is an area that should be given continued attention. In this regard, it remains difficult to control reproduction under hatchery conditions for a large number of commercially-important species. At present, an understanding of reproductive mechanisms in Crustacea is not complete, although in recent years, a great deal of knowledge has accumulated on vitellogenin structure, processing, and synthetic site in a number of economically-important species. This monograph will cover the current status of research on vitellogenin in decapod crustaceans, especially prawns and shrimp, and discuss mechanisms of vitellogenin synthetic control, both demonstrated and postulated. The monograph will also present current knowledge of crustacean vitellogenin receptors, and cover related facets of reproductive development, such as mechansisms of cortical rod formation and the utilization of vitellin during embryogenesis. Finally, future directions for this research and potential applications to aquaculture will be discussed.

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“…The well-known reproductive regulatory hormones in crustaceans are gonad-inhibiting hormone/Vitellogenesis inhibiting hormone (GIH/VIH) synthesized and secreted from the X-organ-sinus gland complex located in eyestalk neural tissue [5,6] gonad-stimulating hormone (GSH) synthesized and released from brain and thoracic ganglion [7][8][9][10][11] and a sesquiterpene hormone methyl farnesoate a secretary product of mandibular organ (MO) [12][13][14][15]. In specific MF is a positive regulator for reproduction and is negatively controlled by mandibular organ inhibiting hormone (MOIH) [2,[16][17][18][19] which suppressed the synthesis and release of MF from MO.…”

Section: Introductionmentioning

confidence: 99%

Methyl Farnesoate Induced Ovarian Maturation in Freshwater Prawn, Macrobrachium rosenbergii

Hemalatha¹,

Parameswari²,

Kishori³

et al. 2017

J Oceanogr Mar Res

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The present study focused to elucidate the effect of methyl farnesoate (MF) on ovarian development and maturation in the freshwater giant prawn, Macrobrachium rosenbergii. Control, eyestalk ablated (ESX) and MF injected prawns were maintained during the experimentation and observed significant (p<0.001) increase in the mean ovarian index, oocyte diameter and ovarian vitellogenin levels in both eyestalk ablated and methyl farnesoate administered prawns when compared with controls. All the MF injected animals are in vitellogenic stage III, whereas ESX animals were showed all the reproductive stages at 30th day of experiment. The levels of protein and lipid in the ovary were also measured. The total protein and lipid content levels were also significantly increased in eyestalk ablated (145.07% and 72.05% respectively) and MF injected animals (315.21% and 118.39% respectively) than the controls. The outcome of the present study clearly suggests that MF stimulates the reproduction in female prawns than the conventional ESX method.

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Induced Ovarian Maturation of Penaeus vannamei by Implantation of Lobster Ganglion

Cited by 59 publications

References 17 publications

Reproductive regulators in decapod crustaceans: an overview

Reproductive regulators in decapod crustaceans: an overview

Reproductive Mechanisms in Crustacea Focusing on Selected Prawn Species: Vitellogenin Structure, Processing and Synthetic Control

Methyl Farnesoate Induced Ovarian Maturation in Freshwater Prawn, Macrobrachium rosenbergii

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