scholarly journals Imposex in endemic volutid from Northeast Brazil (Mollusca: Gastropoda)

2008 ◽  
Vol 51 (5) ◽  
pp. 1065-1069 ◽  
Author(s):  
Ítalo Braga de Castro ◽  
Carlos Augusto Oliveira de Meirelles ◽  
Helena Matthews-Cascon ◽  
Cristina de Almeida Rocha-Barreira ◽  
Pablo Penchaszadeh ◽  
...  
Keyword(s):  
First Record ◽  
Reproductive Organs ◽  
Organotin Compounds ◽  
Northeast Brazil ◽  
Gastropod Species ◽  
Antifouling Paints ◽  
Tin Compounds ◽  
Stramonita Haemastoma ◽  
Mollusk Species ◽  
Female Reproductive Organs

Imposex is characterized by the development of masculine sexual organs in neogastropod females. Almost 120 mollusk species are known to present imposex when exposed to organic tin compounds as tributyltin (TBT) and triphenyltin (TPT). These compounds are used as biocide agents in antifouling paints to prevent the incrustations on boats. Five gastropod species are known to present imposex in Brazil: Stramonita haemastoma, Stramonita rustica, Leucozonia nassa, Cymathium parthenopeum and Olivancillaria vesica. This paper reports the first record of imposex observed in the endemic gastropod Voluta ebraea from Pacheco Beach, Northeast Brazil. Animals presenting imposex had regular female reproductive organs (capsule gland, oviduct and sperm-ingesting gland) and an abnormal penis. As imposex occurs in mollusks exposed to organotin compounds typically found at harbors, marinas, shipyards and areas with high shipping activities, probably contamination of Pacheco Beach is a consequence of a shipyard activity located in the nearest areas.

First record of female intersex in Hirschmanniella shamimi Ahmad, 1972 (Nematoda: Pratylenchidae), with a checklist of intersexes in plant nematodes

Zootaxa ◽  
2009 ◽  
Vol 1973 (1) ◽  
pp. 61-68 ◽  
Author(s):  
KAN ZHUO ◽  
JINLING LIAO ◽  
RUQIANG CUI ◽  
YUZHONG LI
Keyword(s):  
Guangdong Province ◽  
First Record ◽  
Reproductive Organs ◽  
Soil Samples ◽  
Rice Roots ◽  
First Time ◽  
Female Reproductive Organs

Two intersexes of Hirschmanniella shamimi are described and illustrated for the first time from soil samples around rice roots in Guangzhou, Guangdong Province, China. The two intersexes have developed female reproductive organs as well as rudimentary male sexual characters. A checklist of intersexes in plant nematodes is also given here.

scholarly journals Imposex in Stramonita haemastoma from coastal sites of Cartagena, Colombia

2017 ◽  
Vol 78 (3) ◽  
pp. 548-555
Author(s):  
L. Sierra-Marquez ◽  
J. Sierra-Marquez ◽  
J. De la Rosa ◽  
J. Olivero-Verbel
Keyword(s):  
Coastal Waters ◽  
Vas Deferens ◽  
Organotin Compounds ◽  
Toxic Effects ◽  
Morphometric Measurements ◽  
Antifouling Paints ◽  
Stramonita Haemastoma ◽  
Size Index ◽  
Sexual Characteristics ◽  
Penis Size

Abstract Imposex is the development of male sexual characteristics caused by the toxic effects of some chemicals that acts as an endocrinal disruptor. Antifouling paints contain these chemicals. Cartagena lacks studies to indicate the extent of imposex in its coastal waters. The aim of this study was to determine the prevalence of imposex in the gastropod Stramonita haemastoma in Cartagena, Colombia. Specimens were collected during 2013 from locations of high and low influence of port activity. Morphometric measurements and the frequency of the occurrence of imposex were registered. The comparison among morphometric variables showed statistically significant differences between the two sites studied. Furthermore, the females of the S. haemastoma species presented an imposex frequency of 93.1% in Birds’ Island, Cartagena Bay, compared to 31.8% in La Bocana. The relative penis size index or RPLI (10.145 and 3.231) and vas deferens sequence index or VDSI (2.83 and 1.16), showed possible contamination by organotin compounds in both places.

scholarly journals Morphology and biological notes of Macrosiagon octomaculata (Gerstaecker) triungulinid and a summary of the knowledge on immature stages of the genus (Ripiphoridae)

2020 ◽  
Author(s):  
Mônica Antunes Ulysséa ◽  
Fabiano Fabian Albertoni
Keyword(s):  
First Record ◽  
Detailed Examination ◽  
Reproductive Organs ◽  
Immature Stages ◽  
Southern Brazil ◽  
Santa Catarina ◽  
Present Information ◽  
Accurate Record ◽  
South Brazil ◽  
Female Reproductive Organs

Species of Macrosiagon Hentz are known to be wasp and bee parasitoids. Here, we present information on Macrosiagon octomaculata (Gerstaecker, 1855), including eggs and triungulinids, found on Paepalanthus polyanthus (Bong.) Sano (Eriocaulaceae) blooming in restinga habitat on Santa Catarina Island, South Brazil. This is the first record of an Eriocaulaceae species playing an important role in the Macrosiagon bionomics and the first accurate record of Ripiphoridae for southern Brazil, Santa Catarina state. In the study area, P. polyanthus attracted an inordinate number of insect species and one Thynnidae wasp was captured with a triungulinid on its wing. Eggs and triungulinids were also found on one plant of P. polyanthus and associated with M. octomaculata. We provide descriptions of the female reproductive organs as well as the morphology of the triungulinid of M. octomaculata. A detailed examination of the triungulinid revealed novelties that complement information from previous publications regarding the Ripiphoridae. We also compare triungulinids of M. octomaculata with those of other species, and provide a table summarizing comparative characters. Finally, we provide a table with current information on the recorded host species and immatures of Macrosiagon.

Ultrastructural aspects of gymnosperms reproductive organs tissues due to their functional condition

1978 ◽  
Vol 36 (2) ◽  
pp. 440-441
Author(s):  
G. M. Kozubov
Keyword(s):  
Metabolic Activity ◽  
Functional Condition ◽  
Reproductive Organs ◽  
Considerable Change ◽  
Complicated Structure ◽  
Tetrad Stage ◽  
Ubisch Bodies ◽  
Similar Organization ◽  
Female Reproductive Organs ◽  
High Metabolic Activity

The ultrastructure of reproductive organs of pine, spruce, larch and ginkgo was investigated. It was found that the male reproductive organs possess similar organization. The most considerable change in the ultrastructure of the microsporocytes occur in meiosis. Sporoderm is being laid at the late tetrad stage. The cells of the male gameto-phyte are distinguished according to the metabolic activity of the or- ganells. They are most weakly developed in the spermiogenic cell. Ta-petum of the gymnosperms is of the periplasmodic - secretorial type. The Ubisch bodies which possess similar structure in the types investigated but are specific in details in different species are produced in tapetum.Parietal and subepidermal layers are distinguished for their high metabolic activity and are capable of the autonomous photosynthesis. Female reproductive organs differ more greatly in their struture and have the most complicated structure in primitive groups. On the first stages of their formation the inner cells of nucellus are transformed into the nucellar tapetum in which the structures similar to the Ubisch bodies taking part in the formation of the sporoderm of female gametophyte have been found.

Medical Metaphors of Women's Bodies: Menstruation and Menopause

1988 ◽  
Vol 18 (2) ◽  
pp. 237-254 ◽  
Author(s):  
Emily Martin
Keyword(s):  
19Th Century ◽  
Reproductive Organs ◽  
Central Control ◽  
Centralized Control ◽  
Medical Texts ◽  
Women's Bodies ◽  
Waste Products ◽  
Bureaucratic Organization ◽  
Medical Metaphors ◽  
Female Reproductive Organs

Implicit, underlying imagery in medical descriptions of menstruation and menopause is exposed, beginning with 19th century views. Contemporary medical texts and teaching reveal two fundamental assumptions about women's bodies. First, they assume that female reproductive organs are organized as if they form a hierarchical, bureaucratic organization under centralized control. Given this assumption, menopause comes to be described negatively, as a process involving breakdown of central control. Second, they assume that women's bodies are predominantly for the purpose of production of desirable substances, primarily babies. Given this assumption, menstruation comes to be seen negatively, as a process involving failed production, waste products, and debris. Alternative imagery that works from our current understanding of physiology, but avoids denigration of women's bodies, is suggested.

Effects of Growth Hormone on Female Reproductive Organs

2001 ◽  
Vol 30 (5) ◽  
pp. 265-271 ◽  
Author(s):  
G. G. Kaiser ◽  
F. Sinowatz ◽  
G. A. Palma
Keyword(s):  
Growth Hormone ◽  
Reproductive Organs ◽  
Female Reproductive Organs

Ultrastructure of the female reproductive organs (ovary, vitellaria, and Mehlis' gland) of Halipegus eccentricus (Trematoda: Derogenidae)

1986 ◽  
Vol 64 (10) ◽  
pp. 2203-2212 ◽  
Author(s):  
Jon M. Holy ◽  
Darwin D. Wittrock
Keyword(s):  
Cell Types ◽  
Reproductive Organs ◽  
Golgi Body ◽  
Digenetic Trematode ◽  
Secretory Cells ◽  
Cortical Granules ◽  
Golgi Bodies ◽  
Transmission Electron ◽  
Vitelline Cells ◽  
Female Reproductive Organs

The female reproductive organs (ovary, vitellaria, and Mehlis' gland) of the digenetic trematode Halipegus eccentricus were studied by transmission electron microscopy. Oocytes entered diplotene while in the ovary and produced cortical granules and lipid bodies. Vitelline cells produced large amounts of eggshell protein but no yolk bodies. Two types of Mehlis' gland secretory cells were present, distinguishable by the morphology of their rough endoplasmic reticulum, Golgi bodies, and secretory bodies, and by the persistence of recognizable secretory material within the ootype lumen after exocytosis. In an attempt to standardize the nomenclature regarding the cell types of the Mehlis' gland, a classification that takes into account these four criteria is proposed. Two basic types of Golgi body organization were noted for the cells of the female reproductive system: a stack of flattened cisternae (Mehlis' gland alpha cells) and spherical Golgi bodies with vesicular cisternae (oocytes, vitelline cells, and Mehlis' gland beta cells).

Statistics of malignant neoplasms of female reproductive organs

2018 ◽  
pp. 64-78
Author(s):  
E.M. Aksel ◽  
N.N. Vinogradova
Keyword(s):  
Reproductive Organs ◽  
Malignant Neoplasms ◽  
Female Reproductive Organs

Tumors of Female Reproductive Organs

1994 ◽  
pp. 827-833
Author(s):  
Kathi D. Clement ◽  
Pamela D. Connor ◽  
Kristina J. Hartman
Keyword(s):  
Reproductive Organs ◽  
Female Reproductive Organs

Proteoglycans and hyaluronan in female reproductive organs

Proteoglycans ◽  
1994 ◽  
pp. 179-190 ◽  
Author(s):  
M. Yanagishita
Keyword(s):  
Reproductive Organs ◽  
Female Reproductive Organs
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