Proceedings: Increased androgen production following irradiation of oestrogen-treated mature male fish, Heteropneustes fossilis (Bloch)

Reproduction ◽  
1974 ◽  
Vol 38 (1) ◽  
pp. 240-241
Author(s):  
S. Rathi
Keyword(s):  
Mature Male ◽  
Heteropneustes Fossilis ◽  
Male Fish

scholarly journals Length-Weight Relationship and Gonad Maturity of Marble sleeper Oxyeleotris marmorata (Bleeker, 1852) in Tondano Lake North Sulawesi

2020 ◽  
Vol 11 (1) ◽  
pp. 23
Author(s):  
Ikky Ahdian Umage ◽  
Nego E. Bataragoa ◽  
Jety K. Rangan ◽  
Anneke V. Lohoo ◽  
Janny D. Kusen ◽  
...  
Keyword(s):  
Condition Factor ◽  
Growth Patterns ◽  
Mature Male ◽  
Allometric Growth ◽  
Female Fish ◽  
Male Fish ◽  
Gonad Maturity ◽  
Weight Relationship ◽  
North Sulawesi ◽  
Fish Samples

The purpose of this study was to determine the length-weight relationship and gonad maturity of Betutu fish (Oxyeleotris marmorata) in Lake Tondano. Fish samples were caught using gill nets and lift nets in Lake Tondano. Total catches of 240 individuals. The legth-weight relation of male fish is W = 0.0094 L3.14 positive allometric growth pattern. Female female fish obtained W = 0.0104 L3.11 positive allometric growth patterns. The condition factor for male fish is 1.46 male and 1.47 female respectively. All levels of gonad maturity (I, II, III, IV and V) were found in each sample both in August and September. The size of the first mature male male fish is 219 ± 3 mm (range in size 216-222 mm) and female fish 171 ± 3 (range in size 169-174 mm).Keywords: Length-Weight, gonad maturity, Tondano Lake ABSTRAKTujuan penelitian ini untuk mengetahui hubungan panjang-berat dan kematangan gonad ikan Betutu (Oxyeleotris marmorata) yang ada di danau Tondano. Sampel ikan  ditangkap menggunakan jaring insang dan jaring angkat di danau Tondano. Total hasil tangkapan  240 individu. Hubungan panjang-berat ikan betutu jantan yaitu W = 0,0094L3,1394 pola pertumbuhan allometrik positif. Ikan betutu betina didapatkan W = 0,0104L3,1137 pola pertumbuhan allometrik positif. Faktor kondisi ikan betutu jantan masing-masing sebesar  1,46 ikan jantan dan  1,47 ikan betina. Seluruh tingkat  kematangan gonad (I, II, III, IV dan V) ditemukan pada setiap sampel baik pada bulan agustus maupun bulan September.  Ukuran pertama kali matang ikan betutu jantan yaitu   219 ±3 mm (kisaran ukuran 216-222 mm) dan ikan betina  171±3  (kisaran ukuran 169-174 mm)Kata Kunci: Panjang-berat, kematangan gonad, Danau Tondano

Morphological and biochemical analyses of changes in rat hepatocytes related to wine and ethanol consumption

1984 ◽  
Vol 42 ◽  
pp. 232-233
Author(s):  
S.M. Geyer ◽  
C.L. Mendenhall ◽  
J.T. Hung ◽  
E.L. Cardell ◽  
R.L. Drake ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Endoplasmic Reticulum ◽  
Enzyme Activity ◽  
Malic Enzyme ◽  
Smooth Endoplasmic Reticulum ◽  
Rat Hepatocytes ◽  
Mature Male ◽  
Treatment Groups ◽  
Malic Enzyme Activity ◽  
Biochemical Analyses

Thirty-three mature male Holtzman rats were randomly placed in 3 treatment groups: Controls (C); Ethanolics (E); and Wine drinkers (W). The animals were fed synthetic diets (Lieber type) with ethanol or wine substituted isocalorically for carbohydrates in the diet of E and W groups, respectively. W received a volume of wine which provided the same gram quantity of alcohol consumed by E. The animals were sacrificed by decapitation after 6 weeks and the livers processed for quantitative triglycerides (T3), proteins, malic enzyme activity (MEA), light microscopy (LM) and electron microscopy (EM). Morphometric analysis of randomly selected LM and EM micrographs was performed to determine organellar changes in centrilobular (CV) and periportal (PV) regions of the liver. This analysis (Table 1) showed that hepatocytes from E were larger than those in C and W groups. Smooth endoplasmic reticulum decreased in E and increased in W compared to C values.

Occurrence of mature male white-spotted charr (Salvelinus leucomaenis) in spring, an unusual season

2021 ◽  
Author(s):  
Ryo Futamura ◽  
Kentaro Morita ◽  
Koume Araki ◽  
Masato Ayumi ◽  
Shoji Kumikawa ◽  
...  
Keyword(s):  
Mature Male ◽  
Salvelinus Leucomaenis

The first report of albinism in a Sundaland endemic rodent

Mammalia ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Jonathan A. Nations ◽  
Ahmad Mursyid ◽  
Ryski Darma Busta ◽  
Sah Putra Adrian ◽  
Heru Handika ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Mature Male ◽  
Congenital Disorder ◽  
Domesticated Animals ◽  
First Report ◽  
West Sumatra ◽  
Sexually Mature

AbstractAlbinism, a congenital disorder that results in a lack of melanin deposition, is common in domesticated animals but rare in nature. Among the ∼2500 species of rodents worldwide, only 67 have published reports of albinism. Here we report the capture of an albino murid (Muridae: Rodentia) from Mt. Singgalang in West Sumatra, Indonesia. The specimen is an adolescent but sexually mature male Maxomys hylomyoides, a montane Sumatran endemic. To our knowledge, this specimen represents the first reported albino rodent from Indonesia and Sundaland, and only the second from Southeast Asia.

scholarly journals Lymphocytic Choriomeningitis Virus Alters the Expression of Male Mouse Scent Proteins

Viruses ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 1180
Author(s):  
Michael B. A. Oldstone ◽  
Brian C. Ware ◽  
Amanda Davidson ◽  
Mark C. Prescott ◽  
Robert J. Beynon ◽  
...  
Keyword(s):  
Mate Selection ◽  
Lymphocytic Choriomeningitis ◽  
T Cell Response ◽  
Mature Male ◽  
Cytotoxic T Cell ◽  
Scent Marks ◽  
High Concentration ◽  
Embryo Survival ◽  
Major Urinary Proteins ◽  
The Individual

Mature male mice produce a particularly high concentration of major urinary proteins (MUPs) in their scent marks that provide identity and status information to conspecifics. Darcin (MUP20) is inherently attractive to females and, by inducing rapid associative learning, leads to specific attraction to the individual male’s odour and location. Other polymorphic central MUPs, produced at much higher abundance, bind volatile ligands that are slowly released from a male’s scent marks, forming the male’s individual odour that females learn. Here, we show that infection of C57BL/6 males with LCMV WE variants (v2.2 or v54) alters MUP expression according to a male’s infection status and ability to clear the virus. MUP output is substantially reduced during acute adult infection with LCMV WE v2.2 and when males are persistently infected with LCMV WE v2.2 or v54. Infection differentially alters expression of darcin and, particularly, suppresses expression of a male’s central MUP signature. However, following clearance of acute v2.2 infection through a robust virus-specific CD8 cytotoxic T cell response that leads to immunity to the virus, males regain their normal mature male MUP pattern and exhibit enhanced MUP output by 30 days post-infection relative to uninfected controls. We discuss the likely impact of these changes in male MUP signals on female attraction and mate selection. As LCMV infection during pregnancy can substantially reduce embryo survival and lead to lifelong infection in surviving offspring, we speculate that females use LCMV-induced changes in MUP expression both to avoid direct infection from a male and to select mates able to develop immunity to local variants that will be inherited by their offspring.

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