scholarly journals Kematangan gonad dan tipe pemijahan ikan lais, Ompok miostoma (Vaillant, 1902) di Daerah Aliran Sungai Mahakam Kalimantan Timur

2018 ◽  
Vol 17 (2) ◽  
pp. 201
Author(s):  
Jusmaldi Jusmaldi ◽  
Dedy Duryadi Solihin ◽  
Ridwan Affandi ◽  
M F Rahardjo ◽  
Rudhy Gustiano
Keyword(s):  
Endemic Species ◽  
Egg Size ◽  
Histologic Examination ◽  
Gonad Maturation ◽  
Gonad Maturity ◽  
Maturity Stages ◽  
East Kalimantan ◽  
Maturation Stages ◽  
Examination Methods ◽  
Males And Females

Silurid catfishes O. miostoma (Vaillant, 1902) is an endemic species in Mahakam Watershed East Kalimantan. Biology reproduction aspect of this species is not yet known. The purpose of this study was to determine the stages of gonad maturation characteristics, egg size, and spawning type. Fish sampling conducted monthly from November 2013 to Oc-tober 2014, using many gears at four locations in Mahakam Watershed, i.e: Semayang Lake, Belayan River, Siran River and Tering River. To determine the stages of gonad maturation in silurid catfishes were carried out by morphologic and histologic examination methods. Spawning fish type was determined based on the distribution of eggs diameter. The results of this research showed that there are five gonad maturation stages of males and females of silurid catfishes. Dis-tribution of eggs diameter in gonad maturity stages ranges from 0.54 – 1.30 mm with simultaneous spawning type.AbstrakIkan lais O. miostoma (Vaillant 1902) adalah spesies ikan endemik di Daerah Aliran Sungai (DAS) Mahakam Kaliman-tan Timur. Aspek biologi reproduksi ikan ini belum pernah diketahui. Penelitian ini bertujuan untuk menentukan karak-teristik tahap kematangan gonad, ukuran telur, dan tipe pemijahan. Pengambilan contoh ikan dilakukan setiap bulan, dari bulan November 2013 sampai Oktober 2014 menggunakan berbagai jenis alat tangkap pada empat lokasi penelitian di DAS Mahakam yang meliputi: Danau Semayang, Sungai Belayan, Sungai Siran, dan Sungai Tering. Penentuan ting-kat kematangan gonad ikan lais dilakukan dengan metode pemeriksaan morfologis dan histologis. Tipe pemijahan ikan lais ditentukan berdasarkan sebaran diameter telur. Hasil penelitian menunjukkan ada lima tahap kematangan gonad jantan dan betina ikan lais. Sebaran diameter telur pada tahap matang gonad berkisar dari 0,54 - 1,30 mm dengan tipe pemijahan serempak.

Seasonal and Morphological Variations of Brown Trout (Salmo truttaf.fario) Kidney Peroxisomes: A Stereological Study

2016 ◽  
Vol 22 (6) ◽  
pp. 1146-1154
Author(s):  
Albina D. Resende ◽  
Alexandre Lobo-da-Cunha ◽  
Fernanda Malhão ◽  
Eduardo Rocha
Keyword(s):  
Proximal Tubule ◽  
Brown Trout ◽  
Gonad Maturation ◽  
Morphological Parameters ◽  
Morphological Variations ◽  
Variation Patterns ◽  
Maturation Stages ◽  
Males And Females ◽  
First Time ◽  
Proximal Tubule Segments

AbstractLiterature about fish kidney peroxisomes is scarce. To tackle this caveat, a stereological approach on renal peroxisome morphological parameters was performed for the first time in a fish, establishing correlations with maturation stages as it was previously done in brown trout liver. Three-year-old brown trout males and females were collected at the major seasons of their reproductive cycle. Trunk kidney was fixed and processed for catalase cytochemistry. Classical stereological methods were applied to electromicrographs to quantitate morphological parameters. Different seasonal variation patterns were observed between genders, and between renal proximal tubule segments I and II. In males, peroxisomes from proximal tubule segment II had a relatively higher volume and number in May, being individually bigger in February. Females presented similar trends, though with less marked variations. Overall, males and females did not show exactly the same seasonal patterns for most peroxisomal parameters, and no correlations were found between the latter and the gonado-somatic index (GSI). Hence, and despite the variations, the morphology of renal peroxisomes is not strictly correlated with gonad maturation kinetics, therefore suggesting that kidney peroxisome morphology is not seasonally modulated by sex steroids, like estradiol, as it seems to happen in liver peroxisomes.

scholarly journals Stimulation of gonad maturation in mullet fish Mugil dussumieri using MT, E2, hCG, and Ovaprim hormone

2019 ◽  
Vol 18 (1) ◽  
pp. 9-22
Author(s):  
Tatak Dwi Cahyono ◽  
Muhammad Zairin Junior ◽  
Odang Carman
Keyword(s):  
Body Length ◽  
Egg Size ◽  
Gonadosomatic Index ◽  
Physiological Solution ◽  
Gonad Maturation ◽  
Gonad Maturity ◽  
And Control ◽  
Egg Diameter ◽  
Estradiol 17Β ◽  
Stimulation Of

ABSTRACT The present study is a preliminary research for producing mullet fry to aquaculture. The research aimed to evaluate stimulation of gonad maturation in mullet (Mugil dussumieri) using hormones. The method used for research was completely randomized design consisting of three treatments and each individual replication was repeated three times. Two experiments were conducted separately with different treatments. First experiment used 9-14.7 cm body length of fish treated with different hormone injections i.e. 4 mg/kg 17α-methyltestosterone (MT), 0.07 mg/kg estradiol-17β (E2), and 0.5 ml/kg 0.9% physiological solution as control. Second experiment used 10-31 cm body length fish treated with 750 IU/kg chorionic gonadotropin (hCG), 0.5 ml/kg Ovaprim, and 0.9% physiological solution as control. Gonadosomatic index (GSI) value of the first experiment on day 60 showed that GSI of E2 treatment (1.31±0.94%) was higher than both MT treatment (1.00±0.51%) and control (0.54±0.20%). On the other hand, the second experiment on day 60 showed that GSI of hCG treatment (7.18±0.59%) was higher than both Ovaprim treatment (3.29±2.66%) and control (6.72±0.32%). Egg diameter frequency distribution for control in the first experiment on day 30 showed that egg size ranged from 9−144 µm. Egg diameter for E2 and MT treatments on day 60 showed that egg size ranged from 9−243 µm and were higher than control. In the second experiment, egg diameter on day 30 for control showed that egg size ranged from 9-144 µm, hCG treatment showed egg size ranged from 9−441 µm, while Ovaprim egg size ranged from 9-111 µm. Blood glucose, blood cholesterol, testosterone and estradiol hormone level in the first and second experiment showed no significant difference. The results showed that estradiol-17β and 17α-methyltestosterone induction in 9-14.7 cm body length mullet increase gonad maturity to stage II while hCG induction in 10-31 cm body length mullet increase gonad maturity to stage III. Keywords : estradiol-17β, hCG, 17α-methyltestosterone, Mugil dussumieri, Ovaprim ABSTRAK Penelitian merupakan rintisan untuk menghasilkan benih ikan belanak dalam wadah budidaya. Penelitian ini bertujuan untuk mengevaluasi pematangan gonad ikan belanak Mugil dussumieri menggunakan hormon. Penelitian dilakukan menggunakan rancangan acak lengkap yang terdiri dari tiga perlakuan dan tiga kali ulangan individu. Terdapat dua percobaan dengan perlakuan berbeda dan dilakukan secara terpisah. Percobaan pertama menggunakan ikan berukuran 9−14.7 cm dengan hormon 17α-metiltestosteron (MT) 4 mg/kg, estradiol-17β (E2) 0.07 mg/kg dan kontrol larutan fisiologis 0.9% 0.5 ml/kg. Percobaan kedua menggunakan ikan berukuran 10−31 cm dengan human chorionic gonadotropin (hCG) 750 IU/kg, Ovaprim 0.5 ml/kg dan kontrol larutan fisiologis 0.9 % 0.5 ml/kg. Nilai gonadosomatic index (GSI) percobaan pertama pada hari ke-60 menunjukkan bahwa pemberian estradiol-17β (1.31±0.94%) lebih tinggi dibandingkan 17α-metiltestosteron (1.00±0.51%) dan kontrol (0.54±0.20%). Hasil percobaan kedua pada hari ke-60 nilai GSI menunjukkan bahwa pemberian hCG (7.18±0.59%) lebih tinggi dibandingkan Ovaprim (3.29±2.66%) dan kontrol (6.72±0.32%). Sebaran frekuensi diameter telur pada percobaan pertama untuk kontrol hari ke-30 menunjukkan kisaran 9−144 µm. Sebaran frekuensi diameter telur untuk estradiol-17β dan 17α-metiltestosteron hari ke-60 menunjukkan kisaran 9−243 µm lebih banyak dibandingkan kontrol. Sebaran frekuensi diameter telur pada percobaan kedua untuk kontrol hari ke-30 menunjukkan kisaran 9−144 µm, hCG 9−441 µm sedangkan Ovaprim hanya 9−111 µm. Kadar glukosa darah, kolesterol darah, hormon testosteron dan estradiol pada percobaan pertama dan percobaan kedua menunjukkan tidak terdapat perbedaan yang nyata. Hasil penelitian menunjukkan bahwa induksi hormon estradiol-17β dan 17α-metiltestosteron pada ikan berukuran 9−14.7 cm dapat meningkatkan kematangan gonad mencapai TKG II sedangkan induksi hormon hCG pada ikan berukuran 10−31 cm dapat meningkatkan kematangan gonad mencapai TKG III. Kata kunci : estradiol-17β, hCG, 17α-metiltestosteron, Mugil dussumieri, Ovaprim

scholarly journals Preliminary Study On Gonad Maturity Stages of the Sea Cucumber Paracaudina australis from Kenjeran Water, Surabaya, Indonesia

2018 ◽  
Vol 116 ◽  
pp. 012035
Author(s):  
Widianingsih Widianingsih ◽  
Muhammad Zaenuri ◽  
Sutrisno Anggoro ◽  
Hermin Pancasakti Kusumaningrum ◽  
Retno Hartati
Keyword(s):  
Sea Cucumber ◽  
Gonad Maturity ◽  
Maturity Stages ◽  
Preliminary Study

scholarly journals Biometric sexual and ontogenetic dimorphism on the marine catfish Genidens genidens (Siluriformes, Ariidae) in a tropical estuary

2017 ◽  
Vol 43 (5) ◽  
pp. 895-903
Author(s):  
Larissa G. Paiva ◽  
Luana Prestrelo ◽  
Kiani M. Sant'Anna ◽  
Marcelo Vianna
Keyword(s):  
Sexual Dimorphism ◽  
Morphological Difference ◽  
Body Measurements ◽  
Guanabara Bay ◽  
Sex Dimorphism ◽  
Total Length ◽  
Maturity Stages ◽  
Males And Females ◽  
Adipose Fin ◽  
Eye Depth

This paper aims to study the ontogenetic sexual dimorphism of Genidens genidens in Guanabara Bay, southeastern coast of Brazil. Altogether 378 specimens were anayzed (233 females and 145 males) with total length ranging from 13.3 to 43.5 cm. Specimens were measured for 12 body measurements, sex was identified and maturity stages were recorded and classified. Pearson’s linear correlation reveled a significant positive correlation between total length and all other body measures, except for base adipose fin, mouth depth and eye depth for immature females. Analyses nested PERMANOVA desing showed significant differences between maturity stages for each sex, between sexes considering or not maturity stages, indicating a variation in morphometric characteristics driven by sexual dimorphism. Differences among all maturity stages were also found, indicating an ontogenetic morphological difference. But immature individuals didn’t differ between sexes indicating that differentiation patterns starts with sexual development. The most important measures differing males and females were related to head characteristics, which appears to be key parameters to evaluate sexual differences. Due to male incubation of fertilized eggs and juvenile individuals <59 mm in their oral cavity, head measures are proposed to be sex dimorphism not related to reproduction, but with post reproductive fase due to ecological and biological needs.  [L1]Modificated  as suggested by Reviewer E.

Non-coding RNA Expression Patterns of Two Different Teleost Gonad Maturation Stages

2020 ◽  
Vol 22 (5) ◽  
pp. 683-695
Author(s):  
Maria Papadaki ◽  
Elisavet Kaitetzidou ◽  
Constantinos C. Mylonas ◽  
Elena Sarropoulou
Keyword(s):  
Expression Patterns ◽  
Gonad Maturation ◽  
Rna Expression ◽  
Non Coding Rna ◽  
Maturation Stages

A new skink of the genus Scincella Mittleman, 1950 (Squamata: Scincidae) from Ba Den Mountain, Tay Ninh Province, southern Vietnam

Zootaxa ◽  
2019 ◽  
Vol 4648 (2) ◽  
pp. 273-286
Author(s):  
SANG NGOC NGUYEN ◽  
VU DANG HOANG NGUYEN ◽  
LUAN THANH NGUYEN ◽  
ROBERT W. MURPHY
Keyword(s):  
New Species ◽  
Endemic Species ◽  
Morphological Characters ◽  
Nucleotide Sequences ◽  
Morphological Data ◽  
Medium Size ◽  
Southern Vietnam ◽  
Males And Females ◽  
Coi Sequences ◽  
Dorsal Pattern

Ba Den is an isolated mountain in southern Vietnam and home to two endemic species of lizards. Herein, we describe another endemic species, a new skink of the genus Scincella Mittleman, 1950, from the area based on morphological data, including hemipenial characters and nucleotide sequences of COI. The following morphological characters diagnose Scincella badenensis sp. nov.: medium size in adults (snout-vent length up to 64.4 mm); toes reach to fingers when limbs adpressed; midbody scale rows 32–36, smooth; paravertebral scales 67–71; dorsal scales not enlarged; ventral scale rows 68–74; supraoculars four; prefrontals in broad contact with one another; loreal scales two; tympanum deeply sunk, without auricular lobules; two enlarged anterior temporal scales; smooth lamellae beneath toe IV 18–20; pair of enlarged precloacal scales; hemipenes short, smooth and forked near the tip with two short lobes and two small terminal papillae; no dorsal pattern in males; and females with black interruptive vertebral line. The new species differs from its congeners by at least 10.4% uncorrected p-distance in COI sequences. 

Beberapa Aspek Reproduksi Siput Lambis lambis di Pesisir Perairan Yenusi, Biak

2016 ◽  
Vol 1 (3) ◽  
pp. 1
Author(s):  
Andriani Widyastuti ◽  
Ludi Parwadani Aji
Keyword(s):  
Sex Ratio ◽  
Management Strategies ◽  
Gonadal Development ◽  
Shell Size ◽  
Gonad Maturity ◽  
Males And Females ◽  
Over Exploitation ◽  
Number Of Males ◽  
Time Of Harvest

<strong>Some Aspects of Reproduction in Conch Lambis lambis of Yenusi Coastal Waters, Biak.</strong> Lambis lambis is a very popular conch species that has been harvested in all sizes encountered. This condition is very alarming because in the long term, its existence in nature will be reduced because there is no chance to reproduce naturally. This study aims to determine the sex ratio and gonad maturity levels of L. lambis in Yenusi waters, so the appropriate time of harvest can be arranged. Samples were collected every month from January to December 2013. Testing and histological analysis were performed in the laboratory. Samples collected were 99 individus with the number of males 45 individus and females 54 individus. The sex ratio of males and females was 1.0:1.2. Gonad maturity level found included all four stages of gonadal development, from TKG I to TKG IV. Gonadal development showed the process of formation and maturation, and the spawning occured throughout the year, with peak spawning in January until March 2013. The size of the shell length obtained ranged from 4.55 to 13.72 cm indicating over-exploitation. Due to the custom local where residents harvested the conches in all sizes found, sustainable management strategies are urgently needed, including moratorium period  when L. lambis is at the peak of spawning, and harvest should only be performed on adult individuals with a minimum shell size of 7 cm, while observing the thickness of the shell and marginal digitations have been formed. <br /><br />

scholarly journals Reproductive aspects of the flyingfish, Hirundichthys affinis from the Northeastern coastal waters of Brazil

2015 ◽  
Vol 75 (1) ◽  
pp. 198-207 ◽  
Author(s):  
MR. Oliveira ◽  
MM. Carvalho ◽  
NB. Silva ◽  
ME. Yamamoto ◽  
S. Chellappa
Keyword(s):  
Sex Ratio ◽  
Coastal Waters ◽  
Sexual Maturity ◽  
Total Body Length ◽  
Gonadal Development ◽  
Biological Information ◽  
Gonad Maturation ◽  
Fishery Resource ◽  
Maturation Stages ◽  
Total Body

The epipelagic flyingfish, Hirundichthys affinis is a major artisanal fishery resource from the Northeastern coastal waters of Brazil. However, biological information about this species has been poorly documented. This paper presents data on the length-weight relationship, sex ratio, length at first sexual maturity, gonadal development and fecundity of H. affinis sampled from the coastal waters of Rio Grande do Norte, Brazil. The total body length and weight for both sexes ranged from 23.4 to 29.4 cm and from 89 to 188g, respectively. The allometric coefficient of males was 2.208 and that of females was 2.985, indicating negatively allometric growth. The sex ratio was 1M:1.6F thus differing from the expected ratio of 1:1 (χ2 = 18.63). The total length at first sexual maturity was estimated at 27.3 cm for males and 27.1 cm for females. The macroscopic characteristics of the gonads indicated four maturation stages. Histological studies of gonads of H. affinis showed seven phases of oocyte development and four phases of spermatocyte development. The mean absolute fecundity was 9092 vitelogenic oocytes. Spawning occurred during the months of March to July. The microscopic descriptions of the stages of gonad maturation indicate that the study area is an important spawning ground of H. affinis.

scholarly journals The dynamics of the liver weight and liver indices in the course of gonad maturation of gadid species on Eastern Kamchatka

2021 ◽  
pp. 5-26
Author(s):  
N. P. Sergeeva
Keyword(s):  
Liver Weight ◽  
Walleye Pollock ◽  
Liver Fat ◽  
Gonad Maturation ◽  
Maturity Stage ◽  
Pacific Cod ◽  
Gonad Maturity ◽  
Eastern Kamchatka ◽  
Saffron Cod ◽  
Post Spawning

Longterm data on the liver weight, hepatosomatic (HSI) and gonadosomatic (GSI) indices of walleye pollock, Pacific cod and saffron cod are analyzed on Eastern Kamchatka in seasonal aspect and in the course of gonad maturation. Individual values of the indices extensively vary and depend on the fish body length, season and stage of gonad maturity. The dynamics of the HSI is agree to the dynamics of the GSI during the year and depending on gonad maturity. The maximum values of the HSI are typical for walleye pollock and Pacific cod individuals with the gonads of the III stage of maturity. The maximum values of the index in saffron cod are found in mature individuals with immature gonads. The minimum values are demonstrated by the fish with the gonads at the stage of final spawning or of post-spawning recovery. During the annual reproduction cycle males and females of walleye pollock and cod realize different scenarios of spending and accumulating liver fat. Whereas the maximum HSI is observed in the fish with the gonads at the III maturity stage, the minimum values in males are typical for individuals with smelting gonads, and in females – on finishing the spawn. That can be connected to possible feeding for the individual. Liver weight and liver index can increase in males just shortly after finishing spawning, in females that is found only at the stage of post-spawning recovery.

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