Sexual Differentiation

Charniaux-Cotton, Hélène; Payen, Geneviève

doi:10.1016/b978-0-12-106409-9.50015-4

Cited by 60 publications

(78 citation statements)

References 76 publications

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“…The anatomical location and appearance of the ovary have been described in the marine amphipods O. gammarella [35] and Echinogammarus marinus [36] after isolation by dissection (Fig. 1).…”

Section: Ovarian Cycle In Amphipodsmentioning

confidence: 99%

“…Various stages of sexual differentiation in the amphipod O. gammarella have been studied in detail by Charniaux-Cotton and Payen [35]. Although females of gammarid amphipods are sexually receptive for only a brief period of the molt cycle, males are considered available for mating during most of their molt cycle [51].…”

Section: Spermatogenesis In Amphipodsmentioning

confidence: 99%

“…The androgenic gland is a paired structure, one of the pair being attached to each vas deferens in most orders of Malacostraca [35]. The androgenic gland hormone (AGH) regulates sexual differentiation of the male reproductive system in malacostracan crustaceans, such as amphipods, and also its functioning and the development of the male secondary sexual characteristics [81].…”

Section: Androgenic Gland Hormone and Regulation Of Spermatogenesismentioning

confidence: 99%

“…The X organ is part of the medulla terminalis in the eyestalk in decapods and projects axons to the sinus gland, which is located in the eyestalks. The neuropeptides are produced in the eyestalks of decapods, but in crustaceans with no differentiated eyestalks, including amphipods, the X organ/ sinus gland complex is located in homologous structures of the central nervous system in the head [35,[78][79][80]. The peptide hormones released from the X organ have diverse effects on growth, molting, and reproduction and have been studied extensively over the last two decades, initially by eyestalk X-organ / sinus gland Fig.…”

Section: Neuroendocrine Control Of Molting and Reproductionmentioning

confidence: 99%

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Review of the reproductive biology of amphipods and their endocrine regulation: Identification of mechanistic pathways for reproductive toxicants

Hyne¹

2011

Enviro Toxic and Chemistry

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Abstract-The reproductive biology of amphipods is reviewed to update the knowledge of the male and female reproductive processes of oogenesis and spermatogenesis as well as the endocrine systems of amphipods with the aim of advancing studies of reproductive toxicology. The ovarian and reproduction cycles of female gammaridean amphipods are closely correlated with the molt cycle, which is under direct control by the steroid hormone 20-hydroxyecdysone. The ability of males to copulate and subsequently for females to ovulate is restricted to the early postmolt period of the females. New developments in our understanding of the molt cycle and the endocrine regulatory pathways for reproduction using genomics techniques on other crustacean species are also discussed. The arthropod sterol ponasterone A or xenobiotics such as the fungicide fenarimol have been shown to elicit endocrine disruption in some crustaceans by acting as an agonist for 20-hydroxyecdysone at the ecdysone receptor or by inhibiting the synthesis of 20-hydroxyecdysone, respectively, resulting in disruption of molting and reproduction. Recent studies suggest that cadmium can inhibit secondary vitellogenesis in amphipods. Experimental approaches for examining the metabolic pathways associated with ecdysteroid hormonal signaling or metabolism, exoskeleton maintenance and molting, and the regulation of vitellogenin in amphipods are discussed. This information should aid in the identification of useful biomarkers for reproductive toxicity. Environ. Toxicol. Chem.

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“…The anatomical location and appearance of the ovary have been described in the marine amphipods O. gammarella [35] and Echinogammarus marinus [36] after isolation by dissection (Fig. 1).…”

Section: Ovarian Cycle In Amphipodsmentioning

confidence: 99%

Section: Spermatogenesis In Amphipodsmentioning

confidence: 99%

Section: Androgenic Gland Hormone and Regulation Of Spermatogenesismentioning

confidence: 99%

Section: Neuroendocrine Control Of Molting and Reproductionmentioning

confidence: 99%

See 2 more Smart Citations

Review of the reproductive biology of amphipods and their endocrine regulation: Identification of mechanistic pathways for reproductive toxicants

Hyne¹

2011

Enviro Toxic and Chemistry

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“…In gonochoristic crustaceans, the AG is also linked to intersexuality. Whereas the co-occurrence of various male and female characteristics is demonstrated in intersex crustaceans, there are only a few studies on sexually dimorphic behaviour patterns in such individuals (Barki et al, 2006) Sexual differentiation in crustaceans is hormonally controlled by the androgenic hormone(s) (AGH) secreted by the AG (Charniaux-Cotton and Payen, 1985). During early development, AG primordia are expressed in genetic males and they determine the development of masculine gametogenic (testes) and endocrine (AG) organs -distinct organs in crustaceans.…”

Section: Laboratory Manipulations: Effect Of Eyestalk Ablation and Anmentioning

confidence: 99%

Different aspects of reproduction strategies in crayfish: A review

Yazicioglu

Reynolds

Kozák

2016

Knowl. Manag. Aquat. Ecosyst.

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-Study of the reproductive strategy of crayfish species is of great importance in the current astacological world. Crayfish are among the largest freshwater invertebrates, and as keystone species, they are able to regulate the structure of the benthic fauna in the freshwaters, demonstrating different ecological strategies and life spans ranging up to 20+ years. In order to bring together the various pieces of information related to this issue, this overview of published scientific reports was conducted. The majority of crayfish species studied show sexual dimorphism, with approximately equal numbers of males and females. However, over some decades numerous observations have been made for a few species that may have different modes of reproduction, such as hermaphroditism or intersex (e.g. Cherax quadricarinatus, Samastacus spinifrons, Parastacus virilastacus and Pacifastacus leniusculus) and parthenogenesis (only Procambarus fallax f. virginalis).A recent study showed a new case of parthenogenesis as apomictic parthenogenesis (only Orconectes limosus). In addition, there are many investigations into the reproduction biology of crayfish, including using eyestalk ablation or androgenic gland ablation under various lab conditions and hybridization under natural conditions (e.g. Astacus astacus X Astacus leptodactylus, Orconectes rusticus X Orconectes propinquus). There are also some chemical factors which could possibly affect the reproduction system of crayfish in the wild.Key-words: crustacea / parthenogenesis / intersex / hybridization Résumé -Différents aspects des stratégies de reproduction des écrevisses : une revue. L'étude de la stratégie de reproduction des espèces d'écrevisses est d'une grande importance dans le monde astacicole actuel. Les écrevisses sont parmi les plus grands invertébrés d'eau douce, et comme des espèces clés, elles sont capables de réguler la structure de la faune benthique dans les eaux douces, présentant différentes stratégies écologiques et des durées de vie allant jusqu'à 20 ans. Afin de réunir les différents éléments d'information relatifs à cette question, une revue des publications scientifiques a été conduite. La majorité des espèces d'écrevisses étudiées montrent un dimorphisme sexuel, avec un nombre approximativement égal de mâles et de femelles. Cependant, depuis quelques décennies, de nombreuses observations ont été faites pour quelques espèces qui peuvent avoir différents modes de reproduction, tels que l'hermaphrodisme ou l'intersexe (par exemple Cherax quadricarinatus, Samastacus spinifrons, Parastacus virilastacus et Pacifastacus leniusculus) et la parthénogenèse (seulement Procambarus fallax f. virginalis). Une étude récente a montré un nouveau cas de parthénogenèse, une parthénogenèse apomictique (seulement Orconectes limosus). En outre, il y a beaucoup de recherches sur la biologie de la reproduction de l'écrevisse, y compris celle de l'ablation du pédoncule oculaire ou ablation de la glande androgène dans diverses conditions de laboratoire et de l'hybridati...

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Biology

and¹,

New²

2000

Freshwater Prawn Culture

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Sexual Differentiation

Cited by 60 publications

References 76 publications

Review of the reproductive biology of amphipods and their endocrine regulation: Identification of mechanistic pathways for reproductive toxicants

Review of the reproductive biology of amphipods and their endocrine regulation: Identification of mechanistic pathways for reproductive toxicants

Different aspects of reproduction strategies in crayfish: A review

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