scholarly journals Biologi Ikan Kembung Rastrelliger spp, (Actinopterygii : Scombridae) : Ditinjau dari aspek Panjang Berat dan Indeks Kematangan Gonad Di Perairan Semarang

2019 ◽  
Vol 8 (2) ◽  
pp. 189-196
Author(s):  
Candrika Pratama ◽  
Retno Hartati ◽  
Sri Redjeki
Keyword(s):  
High Salinity ◽  
Maturation Stage ◽  
Gonad Maturation ◽  
Female Fish ◽  
Male Fish ◽  
Real Effect ◽  
Length Measure ◽  
Increasing Demand ◽  
Maturation Index ◽  
The Relationship

Ikan kembung (Rastrelliger spp) merupakan salah satu ikan pelagis yang hidup di perairan bersalinitas tinggi dan suka hidup bergerombol. Semakin meningkatnya permintaan akan ikan membuat semakin tinggi penangkapan ikan yang dilakukan. Penelitian ini bertujuan mengetahui tingkat kematangan gonad ikan kembung (Rastrelliger spp) dan mengetahui hubungan antara panjang dengan berat, hubungan antara berat dengan fekunditas, dan hubungan antara berat gonad dengan IKG (Indeks Kematangan Gonad) dari ikan kembung (Rastrelliger spp).Sebanyak 80 ekor Ikan Kembung yang didapatkan dari pasar kobong diukur panjang total dan ditimbang beratnya. Kemudian dilakukan pembedahan untuk diamati jenis kelamin dan tingkat kematangan gonadnya. Penelitian ini meliputi: Indeks Kematangan Gonad, Tingkat Kematangan Gonad, fekunditas dan rasio kelamin. Pengamatan tingkat kematangan gonad dilakukan untuk menentukan indeks kematangan gonad (IKG). Tingkat kematangan gonad ikan kembung (Rastrelliger spp) terdiri dari TKG I sampai TKG V. Nilai IKG yang didapatkan untuk ikan jantan berkisar 0,14-6,42% dan betina berkisar 0,64-7,25%, hal tersebut menunjukkan bahwa nilai tersebut bervariasi antara ikan jantan dan betina. Hasil penelitian dengan 80 sampel ikan kembung menunjukkan rasio kelaminnya tidak seimbang yaitu 42,5:57,5 dimana angka jantan lebih tinggi. Pertambahan ukuran panjang memberikan pengaruh yang nyata terhadap fekunditas, pertambahan ukuran panjang ikan kembung betina memberikan pengaruh yang nyata terhadap berat, pertambahan ukuran panjang ikan kembung jantan memberikan pengaruh yang nyata terhadap berat. Sedangkan berat ikan betina tidak memberikan pengaruh yang nyata terhadap IKG dan berat ikan jantan memberikan pengaruh yang nyata terhadap IKG Rastrelliger spp is one of the pelagic fish that live in high salinity and like to live in groups. The increasing demand for this fish, makes the catching activity of this fish grow higher. The aim of the research is to know the Gonad Maturation Stage (GMS) of  Rastrelliger spp to know the relationship between length and weight, the relationship between weight with fecundity, and relationship between gonad weight and Gonad Maturation Index from Rastrelliger spp. 80 samples of Rastrelliger spp that were obtained from the market were measured, the measurement included were length and weight. And then a surgery was performed to examine their sex and their Gonad Maturation Stage. In the end to obtain the results of its fecundity, its gonad were taken and the weight was measured. GMI. Gonad maturation stage of Rastrelliger spp fish was I-V. the range of GMI for male fish was 0,14-6,42% and female 0,64-7,25%. That were indicated a various values of GMI male and female fishes. The result of research with 80 samples of Rastrelliger spp showed unbalanced sex ratio 42,5: 57,5 where male number was higher. The addition of length measure gave a real effect to fecundity, the increase of length of female gave a significant effect on the weight, the increase of length of  male gives a real effect on the weight. While the weight of female fish did not give a real effect on GMI and the weight of male fish gives a real effect on GMI

Linking ‘Halal’ Friendly Hotel Attributes and Customer Satisfaction:The Islamic Tourism Sector

2016 ◽  
Vol 4 (4) ◽  
pp. 43
Author(s):  
Lennora Putit ◽  
Mazzini Muda ◽  
Ainul Nadzirah Mahmood ◽  
Nor Zafirah Ahmad Taufek ◽  
Norhayati Wahib
Keyword(s):  
Customer Satisfaction ◽  
Dress Code ◽  
Significant Relationships ◽  
Tourism Sector ◽  
Managerial Implications ◽  
Halal Food ◽  
Increasing Demand ◽  
Islamic Dress ◽  
The Relationship ◽  
Survey Questionnaires

An increasing demand for Islamic tourism has driven the concept of a ‘Halal’ (or permissible) friendly hotel into another level of business insight within the consumers’ travel market. The concept via its unique value proposition has rapidly become very attractive not only to Muslim tourists, but also to non-Muslim tourists globally. This study aims to examine the relationship linking ‘Halal’ friendly hotel attributes and customer satisfaction. Using purposive sampling, a total of 410 survey questionnaires were distributed to targeted respondents with only 323 usable feedbacks and used for data analysis. Regression results revealed that four main “Halal-friendly hotel” attributes have significant relationships with customer satisfaction. These include prayer facilities, Halal food, Islamic dress code and general Islamic morality. Of these four attributes, prayer facilities proved to have the most significant impact on customer satisfaction. Findings and managerial implications were further discussed in this article.

Infection of American smelt in Lake Ontario and Lake Erie with the microsporidian parasite Glugea hertwigi (Weissenberg)

1972 ◽  
Vol 50 (9) ◽  
pp. 1183-1188 ◽  
Author(s):  
M. Chen ◽  
G. Power
Keyword(s):  
Digestive Tract ◽  
Lake Erie ◽  
Ovarian Tissue ◽  
Lake Ontario ◽  
Parasite Load ◽  
Sexual Differences ◽  
Striking Difference ◽  
Female Fish ◽  
Microsporidian Parasite ◽  
Male Fish

In samples taken monthly throughout the year the percentage of American smelt in Lake Ontario and Lake Erie containing cysts of Glugea hertwigi was 5.2% and 62.7% respectively. Sexual differences in incidence were observed, the significance of which was uncertain as results from the two lakes were contradictory.In male fish infection was almost entirely restricted to the digestive tract with few cysts in the liver, skin, and testes. In female fish the digestive tract and ovaries were similarly infected.Seasonal fluctuations in Glugea infection were obvious and seemed correlated with the gonadal cycle. In both sexes the highest parasite load corresponded with the onset of maturation.A striking difference in fecundity between the two smelt populations was attributed to the Glugea infection. In females parasite cysts replaced ovarian tissue, causing a reduction in the number of maturing eggs.

Experimental Study on the Emergency Ampacity of XLPE Cable and its Application

2014 ◽  
Vol 599-601 ◽  
pp. 931-934
Author(s):  
Xiao Liang Zhuang ◽  
Hai Qing Niu ◽  
Qun Feng Zhang ◽  
Kai Fa Ye ◽  
Guang Hui Sun
Keyword(s):  
Power Supply ◽  
Transmission Capacity ◽  
Design Stage ◽  
Initial Current ◽  
Xlpe Cable ◽  
Lifting Capacity ◽  
Increasing Demand ◽  
Line Design ◽  
The Relationship ◽  
New Distribution

In order to solve the contradiction between the increasing demand of power supplies and the difficulty of building new distribution lines, improving the transmission capacity of existing distribution cables is imperative. Using emergency ampacity can increase cable transmission capacity temporarily. Software of calculation emergency ampacity of distribution cable is developed and experiments are undertaken in this paper. The consistency of calculation and experiments shows that the software could calculate emergency ampacity of distribution cable correctly. By the software, the relationship between emergency ampacity and emergency time & initial status are studied here. The research shows that emergency ampacity is much higher than the continuous ampacity. What’s more, the shorter emergency time is, the higher emergency ampacity will be. The lower initial current is, the higher emergency ampacity will be. The more cable circuit number is, the lower emergency ampacity will be but the stronger lifting capacity will be. If emergency ampacity is considered in cable line design stage, cable cross-section or the number of circuit number could be reduced; and if emergency ampacity is considered in emergency load control, the number and capacity of transferring power supply can be reduced. The application the emergency ampacity of distribution cable will result in a great improvement in economy and reliability of power supply.

scholarly journals Reproduction biology of Abe's flyingfish, Cheilopogon abei Parin, 1996 in Geser East Seram Strait Waters

2021 ◽  
Vol 21 (2) ◽  
pp. 167-184
Author(s):  
Friesland Tuapetel
Keyword(s):  
Fork Length ◽  
Biological Information ◽  
Female Fish ◽  
Male Fish ◽  
Gonad Maturity ◽  
Gill Net ◽  
Flying Fish ◽  
Reproduction Biology ◽  
Fish Samples ◽  
June July

Eco-biological information of Cheilopogon abei in Geser Streit is unknown. The objective of this research is to observe the sex ratio, first size maturity, gonad maturity and gonado somatic index (GSI) with fecundity of flying fish Ch abei in Geser East Seram Strait waters. Sampling was done for ten months started from February to November 2018, using gill net measuring 1.50 inch. All fish samples were measured in fork length and weighted so dissected to make observations on the level of gonad maturity and the number of eggs in female fish. A total of 682 flying fish was found during the study with a fork length range of 182.6-243.3 mm and a weight of 73.98-115.45 g. The results of the analysis showed that the proportion of the number of male fish was less than that of the female fish for almost every month of observation. The first size gonad mature of male and female is 210.5 mm and 214.1 mm FL. The gonad maturity index of male fish ranges from 0,963-7,967 and female fish ranges 1,315-8,069, the total fecundity is 2321-9438 eggs. Gonads of ripe fish in each month of observation. The spawning peak of Ch abei takes place in June-July and it is hoped that no arrests will be made in both months, to ensure the sustainability of the stock.

scholarly journals Gonadal morphology, histology and spermatogenesis of striped piggy fish, Pomadasys stridens (Forsskal, 1775) (Family: Pomadasyidae) from Karachi coast, Pakistan.

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Amtyaz Safi
Keyword(s):  
Reproductive Biology ◽  
Sexual Maturity ◽  
Fat Body ◽  
Histological Structure ◽  
Reproductive State ◽  
Female Fish ◽  
Structure Morphology ◽  
Morphological Differences ◽  
The Right ◽  
The Relationship

A study was conducted on the histological structure, morphology of gonads and spermatogenesis of testes of the striped piggy fish, Pomadasys stridens from Karachi coast of Pakistan. The reproductive biology of grunt fishes, and the Pomadasys stridens in particular, is not well understood with respect to functional morphology and histology of the gonads in relation to sexual maturity. In the course of an investigation of the genetic variability of Pomadasys stridens, differences in morphology were observed between the right and left gonad of male and female fish and the size of the fat body associated with the gonads. Histological examinations were made to determine the relationship between these morphological differences and the reproductive state of the gonads. Findings made from this paper are gonad morphology, histology, and spermatogenesis and relate them to the reproductive biology of this species.

scholarly journals The The spawning aplication of Koi (Cyprinus carpio) using semi-natural method in Desa Perbarakan, Deli Serdang Regency

2020 ◽  
Vol 5 (2) ◽  
pp. 372-377
Author(s):  
Desrita ◽  
Vindy Rilani Manurung ◽  
Rizky Febriansyah Siregar ◽  
Rusdi Leidonald ◽  
Amanatul Fadhilah ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Cyprinus Carpio ◽  
Hormone Level ◽  
Anaesthetic Techniques ◽  
Land Area ◽  
Female Fish ◽  
Male Fish ◽  
Freshwater Aquaculture ◽  
Fish Spawning ◽  
Egg Yolks

Based on statistical analysis from Dinas Kelautan Perikanan, Deli Serdang Regency in 2018, The capacity for freshwater aquaculture output was recorded at 1328.9 tons / year with a land area of 65.9 ha , which is a problem for the aquaculture community with the decreasing quantity of seed production, limited infrastructure and development management which is still conventional in Desa Perbarakan, Deli Serdang Regency, therefore it is important to implement the required application of science and technology, namely the implementation of semi-natural methods of spawning techniques of koi fish (Cyprinus carpio). Counseling, seminars and practices are the methods of tasks carried out. Extension activities were carried out by illustrating the conceptual awareness of the development of koi fish spawning strategies, the distribution of leaflets, the application of recognition technology, as well as tools and resources, including the dose of gonadotropin hormone (GnH) in broodfish and fish anaesthetic techniques. For female fish, the injected hormone level is 0.5 ml / kg and 0.1 ml / kg for male fish. The weight of the female fish is 1 kg tancho sanke doitsu, 0.5 ml/gr, and the weight of the male fish is 1 kg. At a dose of 0.1 ml / gr and 900 g of shiro, kohaku at a level of 0.09 ml / gr. The result is that the number of eggs is estimated at 10,000, and then the eggs hatch within 2-4 days. Boiled egg yolks are fed to the eggs which hatch into the larvae, then the larvae are transferred to the nursery pon after 10 days of age.

scholarly journals Relationship between Gender and Opinion Leadership among the Fish Farmers of Chhattisgarh

2021 ◽  
Vol 57 (4) ◽  
pp. 93-96
Author(s):  
Dileshwari Ratre ◽  
S. N. Ojha ◽  
Arpita Sharma ◽  
Ramasubramanian V ◽  
Rajpal Yadav
Keyword(s):  
Gender Roles ◽  
Fish Farming ◽  
Opinion Leaders ◽  
Opinion Leadership ◽  
Family Resources ◽  
Female Fish ◽  
Male Fish ◽  
Extension Professionals

The ratio of fish farmers to fisheries extension professionals was 1:1000 which is too low. Para-extension functionaries can fill up this gap in the fisheries sector to improve the production and productivity of fishers. The opinion leaders from the local fish farmers community will help identify fish farmers who can further transfer the knowledge concerning how to fish to others through their diffusion network. This study was undertaken to analyze gender roles in fish farming and their relation with opinion leaders. It was observed that 90% of male fish farmers had control of fisheries/family resources, and 97 per cent of fish farmers were found to have contact with male opinion leaders. At the same time, 33% of female fish farmers were contacted by shelf help groups and local progressive farmers. The study shows that the opinion leaders influenced the fish farmers’ diffusion network and their knowledge about how to fish. To involve women in the fisheries sector, empower women, there is also a need to select opinion leaders preferred by women fish farmers.

Effects of estrogen on whole animal and tissue glucose use in female and male rainbow trout

1992 ◽  
Vol 263 (6) ◽  
pp. R1241-R1247 ◽  
Author(s):  
B. S. Washburn ◽  
M. L. Bruss ◽  
E. H. Avery ◽  
R. A. Freedland
Keyword(s):  
Adipose Tissue ◽  
Rainbow Trout ◽  
Plasma Glucose ◽  
Ovarian Tissue ◽  
Glucose Consumption ◽  
Whole Body ◽  
Glucose Turnover ◽  
Sham Operation ◽  
Female Fish ◽  
Male Fish

Reports of changes in carbohydrate metabolism during vitellogenesis in fish prompted an investigation of the effects of estrogen on glucose utilization in rainbow trout. Estrogen pellets were implanted in both female and male fish, and a third group of male fish was given a sham operation. After cannulation of the dorsal aorta, D-[1-3H]glucose and 2-deoxy-D-[U-14C]glucose were injected into the fish to observe whole animal and tissue glucose use. We found that estrogen does not affect glucose turnover rate or transit time but causes a decrease in plasma glucose concentration and size of the glucose mixing pool. Adipose tissue in female fish utilized glucose at a higher rate than sham fish. Ovarian tissue used more glucose per kilogram of body weight than the testes of the male fish. Regardless of treatment, brain had the highest rate of glucose consumption per gram of tissue, followed by gonads and red blood cells. Muscle and adipose tissue utilized only small amounts (< 1 nmol.g tissue-1.min-1) of glucose. We conclude that an increase in the rate of whole body glucose use is not responsible for the fall in plasma glucose caused by estrogen and seen during vitellogenesis.

scholarly journals The Relationship Between Bulb Yield and Allicin Concentration in Garlic Varieties

Proceedings ◽  
2019 ◽  
Vol 36 (1) ◽  
pp. 28
Author(s):  
Nguyen ◽  
Wehr ◽  
O’Hare ◽  
Hong ◽  
Menzies ◽  
...  
Keyword(s):  
Block Design ◽  
Health Benefits ◽  
Field Trials ◽  
Organosulfur Compounds ◽  
Potential Health ◽  
Agronomic Practices ◽  
Negative Effect ◽  
Increasing Demand ◽  
Tropical Varieties ◽  
The Relationship

Garlic (Allium sativum L.) is used as a vegetable and medicinal plant. It is a rich source of organosulfur compounds, in particular allicin, which contributes to the flavour and health benefits. Although worldwide garlic production is increasing, demand continues to outstrip supply. Improving the yield of garlic will address the increasing demand, while increasing allicin concentration will improve its potential health benefits and flavour. It is unknown if increasing garlic bulb size (yield) has a negative effect on allicin concentration of garlic. Therefore, a fundamental understanding of the relationship between yield and allicin concentration is required. A field experiment was conducted at Gatton (QLD, Australia) with 32 varieties, of which 29 varieties were sourced from World Vegetable Centre and 3 varieties from existing Queensland sub-tropical varieties. The garlic cloves were planted in March 2018 with 4 replicates in a randomised complete block design and harvested when garlic had 70% senescence. Varieties showed large variation in bulb size, ranging from about 35 to 120 g, with fresh yield ranging from about 5.5 to 16 t/ha. The allicin concentration ranged from 3.5 to 6.6 mg g−1 fresh weight (FW) between varieties and more than 50% of varieties were under the minimum pharmaceutical standard for allicin concentration (>4.5 mg g−1 in FW). Across varieties there was an inverse relationship between yield and allicin concentration. However, there were some varieties which had both high allicin concentration and yield. Current field trials investigate the effect of agronomic practices on yield and allicin concentration in garlic varieties.

Ligula intestinalis infection as a potential source of bias in the bioindication of endocrine disruption in the European chub Leuciscus cephalus

2005 ◽  
Vol 79 (1) ◽  
pp. 91-94 ◽  
Author(s):  
M. Schabuss ◽  
M. Gemeiner ◽  
A. Gleiß ◽  
J.W. Lewis ◽  
I Miller ◽  
...  
Keyword(s):  
Developmental Stages ◽  
Gonadosomatic Index ◽  
Endocrine Disrupting Chemicals ◽  
Infected Fish ◽  
Female Fish ◽  
Male Fish ◽  
Ligula Intestinalis ◽  
European Chub ◽  
Endocrine Disrupting ◽  
Leuciscus Cephalus

AbstractEuropean chub Leuciscus cephalus collected from five localities in the lowland and subalpine regions of Austria were analysed for oestrogenic effects of endocrine-disrupting chemicals and the presence of the plerocercoid of the tapeworm Ligula intestinalis. Of 1494 chub analysed, only seven (six males, one female) were found to be infected with single, but large plerocercoids up to 15 cm in length. Ligula-infected fish showed comparatively immature gonads, as demonstrated by the gonadosomatic index and gamete developmental stages. Plasma levels of the egg precursor protein vitellogenin also showed concentrations ranging below the detection limit. The present results indicate that chub infected with L. intestinalis and exposed to exogenous oestrogenic compounds can result in reduced gonadal maturation and produce false oestrogen-positive diagnoses in male fish. For plasma vitellogenin levels, L. intestinalis infections can result in false oestrogen-negative diagnoses in male and female fish.

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