scholarly journals FEKUNDITAS DAN DIAMETER TELUR IKAN TERBANG DI PERAIRAN SELAT MAKASSAR DAN UTARA BALI

2017 ◽  
Vol 3 (3) ◽  
pp. 191
Author(s):  
Firman Ferdiansyah ◽  
Augy Syahailatua
Keyword(s):  
Strong Relationship ◽  
Gonad Weight ◽  
The Third ◽  
Weak Relationship ◽  
Total Length ◽  
Maturity Stages ◽  
Egg Diameter

Fekunditas dan diameter telur ikan merupakan bagian dari studi reproduksi biologi perikanan. Aspek ini dikaji dari tiga jenis ikan terbang, yaitu Cheilopogon cyanopterus, Hirundichthys oxycephalus, dan Parexocoetus mento yang dikumpulkan dari hasil tangkapan nelayan dengan jaring insang hanyut di perairan Takalar (Selat Makassar) dan Pemuteran (Bali Utara). Jumlah contoh yang diamati 58 gonad ikan betina yang berada pada tingkat kematangan gonad III dan IV. Fekunditas tertinggidimiliki oleh Parexocoetus mento, namun rata-rata fekunditas tertinggi dimiliki oleh jenis Hirundichthys oxycephalus. Korelasi antara fekunditas dan panjang total ikan memiliki tingkat keeratan yang rendah, sedangkan korelasi antara fekunditas dan bobot gonad memiliki tingkat keeratan yang kuat. Distribusidiameter telur ikan pada ketiga jenis ikan terbang ini tidak menunjukan perbedaan yang signifikan, namun secara umum diameter telur pada tingkat kematangan gonad III (0,33-2,21 mm) lebih kecil dari pada tingkat kematangan gonad IV (0,45-2,36 mm). Penelitian ini memberikan indikasi bahwaterdapat variasi fekunditas dan diameter telur antar jenis ikan terbang, serta lokasi penangkapan ikan terbang yang dilakukan oleh nelayan lokal saat ini merupakan daerah pemijahan. Fish fecundity and egg diameter are essential aspects in the study of fishery biological reproductive. These two aspects were observed on three species of fyingfish Cheilopogon cyanopterus, Hirundichthys oxycephalus, and Parexocoetus mento which collected from fishermen caught used a drift gillnet in the waters of Takalar (Makassar Strait) and Pemuteran (north Bali). Numbers of samples examined were 58 gonads of flyingfish at the third (develop) and fourth (mature) maturity stages. The higest fecundity was in the gonad of Parexocoetusmento, however the highest of fecundity mean was in Hirundichthys oxycephalus. The correlation between fecundity and total length shows a weak relationship, however the correlation between fecundity and gonad weight show a strong relationship. Egg diameter of these three flyingfish species had no significant different, but generally egg diameter of develop gonad (0.33-2.21 mm) was smaller than the mature one (0.45-2.36 mm). This study indicates variability in fecundity and eeg diameter among flyingfish species. In addition, the fishing grounds also indicates spawing grounds.

scholarly journals Kültür Koşullarında Astacus leptodactylus (Eschscholtz, 1823)'un Yumurta Verimliliğinin Belirlenmesi

2019 ◽  
Vol 7 (4) ◽  
pp. 646
Author(s):  
Gülşen Uzun Gören ◽  
Sedat Karayücel ◽  
Birol Baki
Keyword(s):  
Negative Relationship ◽  
Live Weight ◽  
Strong Relationship ◽  
Culture Conditions ◽  
Total Weight ◽  
Astacus Leptodactylus ◽  
Total Length ◽  
The Mean ◽  
Egg Diameter ◽  
The Relationship

In this study, it was aimed to determine there and fecundity by adapting crayfish (Astacus leptodactylus) obtained from Bafra Fish Lakes (Ulugöl-Samsun) in culture conditions. Crayfish obtained in November 2016 were stocked in tanks and egg and morphometric characteristics of female crayfish with carrying eggs were determined. Correlation analysis were used for the relationship between the determined parameters. The mean total weight and total length of crayfish were 41.79±3.00g, 10.72±0.22cm, respectively whereas the mean number and diameter of eggs were 156.40±33.24 and 2.50±0.12mm. There were positive strong relationship between total length and total weight of crayfish negative relationship was found between egg diameter and total number of eggs, egg diameter and total weight of eggs and egg diameter and number of eggs for per unit of live weight.

scholarly journals ASPECTS OF REPRODUCTIVE BIOLOGY AND ABUNDANCE OF AFRICAN BONYTONGUE (HETEROTIS NILOTICUS) IN GREAT KWA RIVER, NIGERIA

2020 ◽  
Vol 1 (1) ◽  
pp. 55-65
Author(s):  
N. U. Ikot ◽  
S. B. Ekanem ◽  
V. O. Eyo
Keyword(s):  
Reproductive Biology ◽  
Sustainable Management ◽  
Gonadosomatic Index ◽  
Total Weight ◽  
Hepatosomatic Index ◽  
Gonad Weight ◽  
Female Population ◽  
Total Length ◽  
Egg Diameter ◽  
The Relationship

This study was conducted to evaluate some aspects of the reproductive biology of the African Bonytongue Heterotis niloticus from the Great Kwa River, Cross River State Nigeria with the view to encourage conservation and rational measures for sustainable management of the species. A total of 62 matured H. niloticus were sampled and their gonadosomatic index (GSI), hepatosomatic index (HSI), condition factor, fecundity and egg diameter (mm) were studied in other to determine the spawning season of the fish. Gonadosomatic index and hepatosomatic index showed an inverse relationship during spawning seasons. Total length (TL-cm) ranged between 47.1 cm – 76.2 cm and total weight (TW – g) ranged between 4300g - 1169g with sex ratio of 1:1.2 (male: female) revealing a dominant female population. Fecundity ranged from 511 oocytes (48.4cm TL; 1.69 kg wt, 5.9g gonad weight) to 7822 oocytes (69.3cm TL, 3.11kg wt. 14.9g gonad weight). The regression equation derived from the scattered diagram in the relationship between fecundity and total weight, total length gonadosomatic index and length-weight is; F= 6.6231TW0.837, R2= 0.2456; F= 5.1112TL1.6367,  R2= 0.1606; F= 10680GSI0.9276, R2= 0.6567; TW= 0.4072TL2.0987, R2= 0.7533, the relationship were significant (p < 0.05). Fecundity and ovary weight relationship showed a positive correlation coefficient of 1. The highest egg diameter (0.92±0.01) was recorded in May and other months with corresponding high gonadosomatic index performance to confirm spawning period. In view to encourage conservation by investigating measures for sustainable management of the species, this study observed that H. niloticus spawns throughout the year. Ikot, N. U. | Department of Zoology and Environmental Biology, University of Calabar, P.M.B.1115 Calabar, Nigeria

scholarly journals PERTUMBUHAN LARVA DAN PRODUKSI BENIH IKAN KERAPU BEBEK Cromileptes altivelis Valenciennes, 1828 HASIL BUDIDAYA TURUNAN KE-3

2018 ◽  
Vol 10 (3) ◽  
pp. 589-600
Author(s):  
Regina Melianawati ◽  
Ni Wayan Widya Astuti ◽  
. Tridjoko
Keyword(s):  
Body Weight ◽  
Survival Rate ◽  
Seed Production ◽  
Larval Growth ◽  
The Body ◽  
Third Generation ◽  
Larval Body ◽  
Spine Length ◽  
The Third ◽  
Total Length

ABSTRAKKetersediaan induk dalam suatu usaha pembenihan memiliki peran yang sangat penting. Namun demikian, ketersediaan induk yang berasal dari alam sangat terbatas jumlahnya, sehingga perlu dilakukan penyediaan calon induk yang berasal dari hasil budidaya. Ikan kerapu bebek Cromileptes altivelis Valenciennes, 1828 turunan pertama (F-1) dan turunan kedua (F-2) sudah dapat diproduksi dari hasil budidaya, namun benih turunan ketiga (F-3) belum dapat diperoleh. Penelitian ini bertujuan untuk mendapatkan karakteristik morfologis dan pertumbuhan larva ikan kerapu bebek F-3 sebagai calon induk F-3, serta tingkat keberhasilan produksi benihnya. Pemeliharaan larva dilakukan dalam hatchery hingga larva menjadi benih. Parameter yang diamati meliputi panjang total dan panjang duri sirip larva, berat tubuh larva serta sintasan dan jumlah produksi benih. Hasil penelitian menunjukkan bahwa panjang total larva umur 5, 15, 25 dan 35 hari, masing-masing adalah 3,20±0,07; 4,42±1,11; 8,35±1,12 dan 12,51±3,23 mm. Duri sirip mulai terukur pada larva umur 15 hari. Berat larva umur 30 hari adalah 0,11±0,04 g. Pola pertumbuhan panjang total dan berat tubuh larva adalah eksponensial, sedangkan pola pertumbuhan duri siripnya adalah linier. Masa pemeliharaan larva hingga menjadi benih adalah ± 40 hari. Jumlah benih ikan kerapu bebek F-3 yang diproduksi dalam satu kali siklus pemeliharaan berkisar 440 hingga 2.300 ekor dari 50 ekor induk dan 3 kali siklus pemijahan dengan tingkat kelangsungan hidup 1,30% hingga 8,80%. Hasil penelitian ini mengindikasikan bahwa ikan kerapu bebek F-3 dapat diproduksi dari hasil budidaya seperti halnya pada F-1 dan F-2. ABSTRACTBroodstocks are the most important part of humpback grouper culture, but their availability in nature are limited. Therefore, it is necessary to produce broodstock candidates from culture. The first (F-1) and the second (F-2) generation of humpback grouper have already been produced but the third generation (F-3) production is still on the way. This study was conducted to find out morphological characteristic of the third generation (F-3) of humpback grouper larvae as the candidate of the third generation of broodstock, larval growth and the success rate of seed production. Larvae rearing was done in hatchery until larvae metamorphosed to be seeds. Observed variables including larval total length and spine length, larval body weight, survival rate and the juvenile productions. The study result showed the total length of 5, 15, 25 and 35 days old larvae were 3.20±0.07; 4.42±1.11; 8.35±1.12 and 12.51±3.23 mm, respectively. The spine began measured on 15 days old larvae. The body weight of 30 days old larvae was 0.11±0.04 g. The growth pattern of larval total length and body weight were exponential, while the growth of spine was linear. Rearing period from larvae to juveniles was 40 days. Number of F-3 seed production of humpback grouper produced from once rearing cycle range between 440 and 2,300 fish and the survival rate range from 1.30% up to 8.80%. Therefore, this study could indicate that seed of F-3 humpback grouper can be produced as those of F-1 and F-2.

scholarly journals A preliminary study of fecundity of whiting, Merlangius merlangus euxinus (Linnaeus, 1758) in coast of Tirebolu (Eastern Black Sea)

2018 ◽  
Vol 6 (3) ◽  
pp. 322
Author(s):  
Burcu Taylan ◽  
Sule Gurkan ◽  
Ertan Taskavak ◽  
Arzu Aydın Uncumusaoglu
Keyword(s):  
Linear Relationship ◽  
Black Sea ◽  
Gravimetric Method ◽  
The Third ◽  
Ovary Weight ◽  
Total Length ◽  
Total Fecundity ◽  
Maturation Stages ◽  
Preliminary Study ◽  
Merlangius Merlangus

In this research, a preliminary study was carried out in January and February 2014 to determine the fecundity of the whiting species in Tirebolu, Eastern Black Sea. After the total length (cm) and weight (0.01 g) of the 70 fish specimens were measured in the laboratory, they were dissected for sex determination. Using the 20 ovaries at the third and fourth maturation stages, 3 sub-samples which is 2-5% of the total ovary weight (from the anterior, median and posterior parts of the ovary) were taken from each ovary to determine the fecundity, and hydrated oocytes were counted with gravimetric method. Total fecundity, total oocytes number in the ovary were computed with the formula F=(n×G)/g. The total length-weight values were 12.6-23.3 cm (mean 17.08±2.12) and 15.59-95.72 g (mean 41.07 ± 16.75), respectively, and total length-weight relationship was computed as W=0.0073L3.024 (R2=0.94) for the 70 fishes evaluated. Fecundity was computed as 3.247-30.534 (mean: 10.139±6.953) eggs and a linear relationship between fecundity and total length was calculated as F=0.0186L4.5631 (R2=0.70). In conclusion, the fecundity results of this prelaminar study were compared with similar studies on the whiting species from Black Sea and other seas.

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.

scholarly journals PengaruhUtangdan PerputaranModalKerjaTerhadapProfitabilitasPerusahaan(Studi Kasus Pada PT Bumi Sekar Tbk Periode 2013-2018)

2020 ◽  
Vol 15 (1) ◽  
pp. 32
Author(s):  
Saprudin ◽  
Bayu Hartono
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Quantitative Research ◽  
Linear Regression Analysis ◽  
Strong Relationship ◽  
Financial Statements ◽  
Working Capital ◽  
Weak Relationship ◽  
Spss Software ◽  
Relationship Of

This study aims to determine how much influence the debt, working capital turnover has on the profitability of PT Sekar Bumi Tbk. Debt is proxied by DER, working capital turnover is proxied by WCT, while profitability is proxied by ROA. Based on the nature of the data used in this study is a type of quantitative research. Samples were taken, namely PT Sekar Bumi Tbk with the objectof research of 2013-2018 financial statements. Linear regression analysis was used in this study, with the help of SPSS software for Windows 20.0. The results of this study explain that partially DER has a significant effect on ROA, and has a very strong relationship of 83.9%. WCT has no significant effect on ROA, and has a very weak relationship of 18.4%. However, simultaneously DER and WCT has a significant effect with a contribution of 70.8% to ROA. So companies need to pay attention and consider how much effective the use of debt as a source of funding for the company.

scholarly journals REPRODUCTIVE BIOLOGY OF STRIPED SNAKEHEAD (Channa striata Bloch, 1973) IN BOGOR AND BEKASI, WEST JAVA

2018 ◽  
Vol 16 (3) ◽  
Author(s):  
Adang Saputra ◽  
Muhamad Hunaina Fariduddin Ath-thar ◽  
Reza Samsudin ◽  
Fera Permata Putri ◽  
Vitas Atmadi Prakoso
Keyword(s):  
Gonadosomatic Index ◽  
Gonad Index ◽  
Strong Relationship ◽  
Mature Female ◽  
Gonad Weight ◽  
West Java ◽  
Promising Tool ◽  
Local Species ◽  
Channa Striata ◽  
Over Exploitation

Striped snakehead is one of the potential local species, however, its production in Indonesia still comes from capture fisheries. Over exploitation had decrease the population in nature. Domestication is one of promising tool to solve the problems faced. In order to breed the domesticated species, the information of their reproduction was needed. This study aimed to describe relationship between length and weight, length and fecundity, weight – fecundity and gonad weight – fecundity of the striped snakehead from West Java. A total of 19 mature female specimens were collected from Parung (Bogor), and seven mature female specimens were collected from Babelan (Bekasi). The results showed that the determinant value (R2), the first for Parung and the second for Babelan, between weight and fecundity were 0.599 and 0.843, length-fecundity were 0.541 and 0.841; gonad weight – fecundity 1.00 and 0.846 Gonadosomatic Index (GSI) ranged from 0.67 to 9.94% and 2.03 to 8.17%. Gonad Index ranged from 6.17 – 76.73 and 18.48 – 76.77, respectively. The data indicated that growth pattern was allometric. Length and body weight has linear relationship with gonads and fecundity. Fecundity has higher correlation to the weight rather than length. Gonad weight and fecundity has a strong relationship.

scholarly journals Fecundity of Wild Freshwater Spiny Eel Mastacembelus armatus Lacepede from Mymensingh Region of Bangladesh

2006 ◽  
Vol 19 (1) ◽  
Author(s):  
M. M. RAHMAN ◽  
G. U. AHMED ◽  
S. M. RAHMATULLAH
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Breeding Period ◽  
Gonad Weight ◽  
Ovary Weight ◽  
Weight Relationship ◽  
Total Length ◽  
Same Gender ◽  
Mastacembelus Armatus ◽  
Sudden Decrease

The fecundity for 40 wild freshwater spiny eel Mastacembelus armatus estimated from Mymensingh region, Bangladesh during the breeding period from March to July 2004. The estimation of fecundity (mature ova) ranged from 3,155 to 24,684 eggs, the maximum fecundity was observed from a fish measuring 535 mm in length and 350 g in weight and the minimum from a fish of 260 mm in length and 51 g in weight. The maximum ova diameter was 2.75 mm in the month of April and minimum was 1.45 mm in May with a median of 2.08 mm in the month of March and then a sudden decrease in July (1.84 mm). The average number of ova present per gm body weight was 70.19 while the average number of ova present per gm ovary weight was 888.04. Fecundity increased with the increase in length and weight of the fish. Maximum GSI value for female spiny eel was 21.67% in the month of March and the minimum GSI value for the same gender was 3.30% in April and the median GSI value for the same was 8.06% in the month of May. The regressions of fecundity on body length, body weight and gonad weight of female spiny eels were Log F = 2.59 - 2.72 × Log L (r = 0.86), Log F = 1.00 + 1.84 × Log BW (r = 0.88) and Log F = 0.69 + 3.25 × Log GW (r = 0.75) respectively, where F is fecundity, L is total length (mm), BW is body weight (g) and GW is gonad weight (g). Fecundity-total length and fecunditybody weight gave a better relationship in comparison with fecundity-gonad weight relationship.

scholarly journals INVOLVING OF TRAINEES-FUTURE TEACHERS OF PROFESSIONAL TRAINING IN PROJECT ACTIVITIES IN THE DISCIPLINE

2018 ◽  
Vol 6 (2) ◽  
pp. 6 ◽  
Author(s):  
M. P. Prokhorova ◽  
A. A. Semchenko
Keyword(s):  
Experimental Work ◽  
Vocational Training ◽  
Professional Training ◽  
Strong Relationship ◽  
Project Work ◽  
Professional Activity ◽  
Practical Implementation ◽  
Future Teachers ◽  
The Third ◽  
Project Activity

Introduction:The project activity in professional training of future teachers of vocational training ensures its ability to effectively solve pedagogical tasks, participate in teamwork, develop educational systems. The requirements of the future specialist's readiness for the project activity are reflected in the GEF and in the professional standard. This determines the relevance of involving future teachers of vocational training in project activities when mastering disciplines.Materials and methods:Experimental work on involving students in the project activities was carried out in three stages. At first, they had experience of participating in different types of project activities, the second involved work on engaging in project activities, and on the third, the effectiveness of involvement in project activities was assessed. At all stages of the study, methods of observation and generalization of pedagogical experience and questioning were used.Results:The first stage revealed the experience of participation in the project activity (the students took part in the development of the content and the project), the sources of difficulties for the students in the project activity (related to the search for ideas, practical implementation of the project and evaluation of its results) obtaining meaningful results and developing teamwork skills). At the second stage, methodical support of the project activity was developed within the framework of the discipline; experimental work in this direction was carried out. At the third stage, the trainees called the skills they perceived as new (to conduct assessment and self-evaluation of the results of the project work, to apply in ICT projects and on-line resources, etc.), indicated the existence of a strong relationship between the gained experience of the project activity and future professional activity, showed a decrease in the share of difficulties in the project work.Discussion and Conclusions:conclusions were drawn about the significant pedagogical potential for involving learners in the project activity in the discipline, provided that the quality of the methodical study of its content and the provision of project assignments at each stage with future professional activity are provided.

scholarly journals A Study on the Perceptual Relationship between Overtime and Output at Private Universities

2019 ◽  
Vol 3 (1) ◽  
pp. 27-31
Author(s):  
Yazen N. Mahmood ◽  
Manaf B. Raewf ◽  
Zaid S. AL- Hamadany
Keyword(s):  
Private Universities ◽  
Strong Relationship ◽  
Weak Relationship ◽  
Extra Effort ◽  
Environment And Health ◽  
Job Content ◽  
Work Arrangement

The overtime is an extra effort to ensure that the job or duty is completed. In private universities, overtime is needed to cover all hours of the courses and this may affect in a good or bad way on the lecture "depending on the number of extra hours".  This research highlights the importance of overtime and how it affects the performance of private universities. The (SPSS) program has been used to analyze the data. 34 questionnaire papers were obtained out of 40 have been distributed on employees at Knowledge University. The study found that there is a strong relationship between employees' Productivity and factors (Wages, Environment and Health, Job content and IT skill). Moreover, there is a weak relationship between Employees' Productivity and factors (Work Arrangement, Stress–Satisfaction).

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