Muhammad Hafeez-ur-Rehman1, Farzana Abbas1, Muhammad Ashraf1, Naeem Tariq Narejo2, Khalid Javed Iqbal3, Ghulam Abbas4* and Syedah Andleeb5
... gonadal development and spawning....
Mousa Keshavarz1*, Ehsan Kamrani1, Narges Amrollahi Biuki1 and Hossein Zamani2
... March to August was the spawning months, as a U-shaped trend by August (mid-summer) as its concave curve and it means that the most stores of gonads is in spring. The operational sex ratio (OSR) of E. mathaei was female-biased and was not significantly different during the study. The monthly adult sex ratio (ASR) was significantly different. It means that the sex ratio has no effects on OSR. Moreover, the gonadosomatic indices GSI 1, GSI 2, and GSI 3 w...
Mousa Keshavarz1*, Maryam Soyuf Jahromi2
...tly different during the spawning period. The monthly sex ratios were significantly different during the spawning times. It was also observed an unstable condition for sex ratio and deviated from 1:1. The maximum of sex ratio was in April (1.07± 0.03) as the start of Spawning and September (0.86±0.02) as the recovery of gonad. Therefore, OSR cannot be affected by sex ratio at...
Gülnur Metin* and İlker Aydin
...ale ratio of 1:0.77. The spawning period was determined from May to October. The total lengths at first maturity of females and males were 10.64 cm and 10.16 cm, respectively.
...
Shafaq Fatima*, Sumrin Sahar and Khalid Lone
...uration in June however, spawning in captivity was not observed. Role of P and 17α-HP was identified more as substrate of sex steroids. Higher levels of sex steroids suppressed the synthesis of cortisol presumably interfering with pituitary-inter-renal axis.
...
Gangchun Xu1,2, Fukuan Du2, Yuyu Wang2, Yan Li2, Zhijuan Nie2 and Pao Xu1,2,*
...n PTGES2b. In the spawning process, the expression of PTGES2a did not significantly change, remaining at a low level. In contrast, PTGES2b expression significantly increased during spawning. These results provide basic knowledge of the new PTGES2s of C. nasus.
...
Khalid P. Loneand Irfana Liaqat*
..., ripe and running, post spawning and spent-regressed. The testis in Labeo rohita were unrestricted and lobular. The maximum GSI (2.89±0.25) was seen in June when the photoperiod and temperatures were highest, while the lowest GSI was seen in October (0.09±0.01). The start of the monsoon rains was a cue for final maturation and spawning and by the middle of July; the testes were already declining and rea...
Riaz Hussain Pasha1*, Muhammad Zubair Anjum2, Imran Ullah2, Muhammad Akram Khan3, Adnan Ali4, Saif-Ur-Rehman5, Sana Batool2 and Arslan Emmanuel2
...ximum size and weight in spawning phase during summer. Free oozing of spermatozoa in testes and ovaries packed with fully grown eggs are the distinct features of this phase. The highest values of Gonadosomatic Index (GSI) for male and female in summer coincided with the histological structure of the gonads where they are in their spawning phase. Present study revealed that C. garua breed once in a year during summer season a...
Weigeng Wen1,2,3, Xu Chen1,2,3, Wang Zhao1,2,3, Qibin Yang1,2,3, Jian G. Qin4 and Zhenhua Ma1,2,3,*
...and nauplii at the first spawning event and female bodyweight were evaluated. At each spawning, a female could produce 120000-1250000 eggs which hatched into 80,000-950,000 nauplii. The egg hatching rate at each spawning varied from 27.4% to 86.3% without particular patterns of correlation with female body weight. The fecundity of pond-reared female P. monodon varied from 2 100 to 9...
Anila Naz Soomro1*, Hiroshi Suzuki2, Sadaf Tabassum Qureshi3 and Wazir Ali Baloch1
...erous females exhibiting spawning migration to the downstream and its juvenile also migrate back to upstream after completing the larval development in Urbaru stream were also observed. Presence of C. sakishsimensis at only St. 1 indicates the species is not using the river continuum for migration. Due to cave dwelling habit of C. sakishsimensis and coral origin of Kikai-jima Island it can be concluded that the species might be using the undergro...
Yunfang Tian, Zeqin Fu, Jiantong Feng, Yahong Guo, Yingying Ye*, Jiji Li and Baoying Guo
...orth to south during the spawning period and expanded the genetic divergence of M. meretrix between north and south samples. We believed that the results could provide genetic insights for fisheries management to plan the fisheries policy of M. meretrix and protect the natural resource.
... 
Md. Alal Hossen1, Mohammad Amzad Hossain1*, A.K.M. Munzurul Hasan1,2, Bipresh Das1, Sohel Mian1, Mohammed Mahbub Iqbal1
...ve and immediately after spawning the average diameter of fertilized eggs were 0.48±0.01 mm. After fertilization, the first cleavage stage of M. gulio occurred within 40 min. The distinctiveness of blastomeres was progressively dropped and morula, blastula, and gastrula stages were found at 3:40 h, 4:20 h and 5:00 h, respectively after fertilization. The larvae-initiated hatching at around 21:00 h after fertilization and total length of larvae were comp...
Jing Yu1*, Yao Lu1,2, Zhaojin Lin1, Pimao Chen1 and Yuting Feng1,3
...mportant area for fishes spawning, feeding, breeding, and migrating. This study built the Suitability Index (SI) Model for the spatial-temporal distribution of spawning grounds in the WGW based on the simple non-linear regression, using satellite remote sensing and investigation data during April to June in 2014 and 2015. Satellite data including Sea Surface Temperature (SST), Sea Surface Salinity (SSS) and water Depth from ...
Song Jiang1,2,3, Ming-ge Zhuang1,2,3, Fa-lin Zhou1,2, Qi-bin Yang1, Jian-hua Huang1, Li-shi Yang1 and Shi-gui Jiang1*
...te, eggs amount, average spawning time and levels of VTG mRNA expression. The results showed that P. tschiliensis, as a closely related terrestrial species of N. succinea, had the best effect on maturation of parent shrimps. The highest gonad weight increase rate of 1845.28% and the largest consecutive spawning rate with average value of 70.66% were both in groups fed on P. tschiliensis, with no signific...
Dharti Shahnawaz Thebo1*, Naeem Tariq Narejo2, Muhammad Hanif Chandio3, Faheem Saddar4, Shahnaz Rashid5, Asma Fatima5 and Ghulam Abbas5
...ext-align: justify;">The spawning periodicity of Ompok pabda from Indus River was elucidated for collection on monthly basis during February 2017 to January 2018. The measurement of egg size, somatic index of gonads and productive potential (fecundity) was considered of the fish under study. Size of the egg increased from March (0.81 mm) to May (1.05 mm) with one spawning peak in May. Somatic index percentage of gonads in bo...
Saeed Akram Khan1, Shahid Sherzada1*, Muhammad Ashraf1, Durr-e-Shehwar1, Sonia Iqbal1, Usman Atique1,3, Farzana Abbas1, Sohail Ahmad2 and Muhammad Sultan Haider4
...peratures on the induced spawning behavior of C. mrigala. The factors investigated include the ovulation time, embryonic and larval development, and yolk sac absorption induced at 4 different water temperatures viz. 26, 29, 32 and 34 ºC. C. mrigala displayed the maximum release of eggs, fertilization and hatching rates at 29 ºC. The maximum number of eggs were observed in 26oC whereas the lowest were obtained in 34oC. 85020.48). However, the temperat...
Nam Thanh Nguyen1,2,3, Linh Manh Ha4, Anh Thi Nguyen5, Nam Hoang Chu5, Hau Duc Tran5, Hung Phuc Nguyen5 and Thuy Thi Ta6*
...e two sexes during their spawning season. The condition factors of both sexes were higher in the wet season when water temperature and food availability are higher. Female fish seemed to be more sensitive to environmental changes. The high value of the condition factors was shown for fish 9.9‒12.8 cm in total length (slightly larger than the optimum size of 11.48). Based on these findings, for a sustainable exploitation plan, we suggest fishing B. sinensis f...
Yingying Ye1, Chengrui Yan1, Kaida Xu2, Jiji Li1, Jing Miao1, Zhenming Lü1 and Baoying Guo1*
...e deterioration of their spawning grounds. In this study, we developed primers for nine microsatellite loci resulting from an enrichment process based on the Wenzhou population. Eight out of nine microsatellite loci were used to analyze population genetic diversity of cuttlefish in China Sea. The results showed high levels of genetic diversity in all populations with highest mean number of alleles and mean effective alleles estimated in population Ningde and l...
Md. Abdullah Al-Mamun1,2, Al-Mamun2,3, Sanjay Kumar Mohanta2,3, Md. Farhan Tazim2,3, Mohammed Rashed Parvej 2,3, Md. Sharif Uddin2,3, Suman Barua1,2 and Liu Qun1*
...e at maturity (Lm), peak spawning season, and sex ratio is crucial for sustainable management for fisheries production. Our study in mers of 655 Silver Pomfret, Pampus argenteus, 366 females and 289 males, collected monthly between February 2019 and January 2020, provides insight into the characteristics of size at sexual maturity, peak spawning season, and sex ratio of the species. Monthly variation in the gonadosomatic ind...
