scholarly journals Yield per recruit from stocking two different sizes of eel (Anguilla anguilla) in the brackish Roskilde Fjord

2015 ◽  
Vol 73 (1) ◽  
pp. 158-164 ◽  
Author(s):  
Michael I. Pedersen ◽  
Gorm H. Rasmussen
Keyword(s):  
Growth Rate ◽  
Scientific Information ◽  
Anguilla Anguilla ◽  
Silver Eel ◽  
Glass Eel ◽  
Recovery Plan ◽  
Yellow Eel ◽  
Roskilde Fjord ◽  
Yield Per Recruit ◽  
The Eu

Abstract Stocking of young eel is widely practised, as a measure, to meet the management target of the EU eel recovery plan. The target of the recovery plan is to increase the escapement to 40% silver eel biomass, relative to pristine conditions. The scientific information to predict the outcome in silver eel biomass from stocking is limited and may depend on whether translocation of wild glass eel or yellow eel is used, or if the stocked eels used are yellow eel from aquaculture. We evaluated the yield from stocking two different sizes, 3 and 9 g eels from aquaculture. A professional fishery recaptured 12.7% of the 3 g and 9.4% of the 9 g eels, originally stocked. Growth rate and mortality rate were different for the two stocked sizes, favouring the small eels. Brutto yield per recruit (YPR) was 13 and 9.2 g and netto YPR was 9.8 and 0.31 g for 3 and 9 g eel, respectively. We conclude that there seems to be no advantage in using larger 9 g eels compared with small 3 g eels for stocking.

Sex-related growth of European eel, Anguilla anguilla, with focus on median silver eel age

1997 ◽  
Vol 54 (12) ◽  
pp. 2775-2781 ◽  
Author(s):  
K Holmgren ◽  
H Wickström ◽  
P Clevestam
Keyword(s):  
Growth Rate ◽  
Anguilla Anguilla ◽  
Growing Season ◽  
European Eel ◽  
Silver Eel ◽  
Glass Eel ◽  
Growing Seasons ◽  
Length Increase ◽  
Silver Eels

Silver eels, Anguilla anguilla, migrating downstream were monitored for 15 years since being stocked in 1980 as cultured fingerlings in a Swedish lake. Females were larger than males in each separate year, but mean growth rate was higher in males than in females. This discrepancy was due to different age distributions, with 64.5% of the males migrating after four or five growing seasons, while 86.3% of the females grew for 10-15 seasons before migration. Otolith length in the glass eel stage was independent of sex, and it was not correlated with year of migration. With focus on median year of migration, otolith lengths after one, two, and three growing seasons were significantly larger in males than in females. This was mainly due to a higher otolith length increase during the first growing season, i.e., before the eels were stocked in the lake. These results are inconsistent with the view that female eels generally grow faster than males.

scholarly journals VITAMIN A OF EEL FISH (ANGUILLA MARMORATA) FROM PALU RIVER AND POSO LAKE

2018 ◽  
Vol 2 (1) ◽  
pp. 24
Author(s):  
Jamaluddin Jamaluddin ◽  
Agustinus Widodo ◽  
Nurul Mufliha
Keyword(s):  
Fatty Acids ◽  
Vitamin A ◽  
High Performance ◽  
Sampling Technique ◽  
Silver Eel ◽  
Glass Eel ◽  
Yellow Eel ◽  
Anguilla Marmorata ◽  
Phase Glass ◽  
Materials Used

Background & Objective: Eel fish (Anguilla marmorata) has high nutritional or nutrition advantages such as protein, minerals, fatty acids and one of them is vitamin A. This study aims to compare the amount vitamin A of eel fish (Anguilla marmorata) phase glass eel, yellow eel, silver eel from Palu River and Lake Poso.  Materials and Methods: The materials used in this research are eel fish (Anguilla marmorata) Glass eel, Yellow eel, Silver eel size from Palu River and Lake Poso, Ethanol, KOH, n-Hexane, BHT (Butyl Hydroxyl Toluene), Methanol. The sampling technique uses purposive sampling based on the type of weight, size and location of the taking. The method used is High Performance Liquid Chromatography (HPLC) where previously conducted saponification test (saponification) on sample of eel fish. Results: The result of vitamin A test on eel fish from Palu River phase of glass eel is 4.01 mg / kg (1336,67 IU / 100 gram), yellow eel 7,26 mg / kg (2420 IU / 100 gram), silver eel equal to 9.73 mg / kg (3243,34 IU / 100 gram). Vitamin A in eels from Lake Poso phase of glass eel of 0.22 mg / kg (73.34 IU / 100 gram), yellow eel 7.16 mg / kg (2386.67 IU / 100 gram), silver eel of 11 , 3 mg / kg (3766.67 IU / 100 gram). Conclusion: vitamin A of eel fish content from Palu River and Lake Poso were significantly different, which was based on p <0,05

scholarly journals COMPARATIVE STUDY OF VITAMIN C OF SIDAT FISH (ANGUILLA MARMORATA (Q.) GAIMARD) GLASS EEL FASE, YELLOW EEL AND SILVER EEL FROM POSO LAKE AND ESTUARY OF PALU RIVER

2018 ◽  
Vol 2 (1) ◽  
pp. 7
Author(s):  
Jamaluddin Jamaluddin ◽  
Anita Tri Damayanti ◽  
Agustinus Widodo
Keyword(s):  
Vitamin C ◽  
Sampling Technique ◽  
Hplc Method ◽  
Vitamin B ◽  
Silver Eel ◽  
Glass Eel ◽  
Yellow Eel ◽  
Anguilla Marmorata ◽  
The Difference ◽  
B Vitamin

Background & Objective: Sidat Fish (Anguilla marmorata (Q.) Gaimard) has high nutrition or nutritional advantages such as vitamin A, vitamin B, vitamin C, vitamin D, vitamin E, protein, minerals, and fatty acids that are good for health. This research was purposed decide the difference of the vitamin c level of Sidat Fish (Anguilla marmorata (Q.) Gaimard), Glass eel fase, Yellow eel and Silver eel from poso lake and estuary of Palu River.  Materials and Methods: The testing of vitamin c using substance the meet of Sidat Fish (Anguilla marmorata (Q.) Gaimard) Glass eel fase, Yellow eel and Silver eel, vitamin C, metaphospat acid and aquadest with the HPLC method (High Perfomance Liquid Chromatography) with Purposive Sampling technique seen based on the size, place, and fish fase as the requirement for the sample taking. Results: The result showed that Sidat Fish (Angilla marmorata (Q.) Gaimard) with Glass eel fase, Yellow eel and Silver eel from Poso lake and estuary of Palu river was not detected there was the content of vitamin C. Conclusion: Sidat fish (Anguilla marmorata (Q.) Gaimard) does not contain vitamin C.

scholarly journals Vitamin C Ikan Sidat (Anguilla Marmorata) Asal Sungai Palu dan Danau Poso

2020 ◽  
Vol 2 (1) ◽  
pp. 7-12
Author(s):  
Jamaluddin Jamaluddin ◽  
Agustinus Widodo ◽  
Anita Tri Damayanti
Keyword(s):  
Vitamin D ◽  
Vitamin C ◽  
High Performance ◽  
Vitamin B ◽  
Silver Eel ◽  
Glass Eel ◽  
Yellow Eel ◽  
Anguilla Marmorata ◽  
E Protein ◽  
B Vitamin

Pendahuluan & Tujuan: Ikan sidat (Anguilla marmorata (Q.) Gaimard) memiliki keunggulan gizi atau nutrisi yang tinggi seperti vitamin A, vitamin B, vitamin C, vitamin D, vitamin E, protein, mineral, dan asam lemak yang baik bagi kesehatan. Penelitian ini bertujuan untuk menentukan perbedaan kadar vitamin C ikan sidat (Anguilla marmorata (Q.) Gaimard) fase Glass eel, Yellow eel, dan Silver eel asal danau Poso dan muara sungai Palu. Bahan dan Metode: Pengujian kadar vitamin C menggunakan bahan berupa daging ikan sidat (Anguilla marmorata (Q.) Gaimard) fase Glass eel, Yellow eel, dan Silver eel dengan metode HPLC (High Performance Liquid Chromatography) dengan teknik Purposive Sampling yang berdasarkan ukuran, tempat dan fase ikan sebagai syarat untuk pengambilan sampel. Hasil: Ikan sidat (Anguilla marmorata (Q.) Gaimard) pada fase Glass eel, Yellow eel, dan Silver eel asal danau Poso dan muara sungai Palu tidak terdeteksi adanya kandungan vitamin C. Kesimpulan: Ikan sidat (Anguilla marmorata (Q.) Gaimard) tidak mengandung vitamin C

Endocrine profiles during silvering of the European eel (Anguilla anguilla L.) living in saltwater

2007 ◽  
Vol 57 (4) ◽  
pp. 453-465 ◽  
Author(s):  
Sylvie Dufour ◽  
Vincent van Ginneken ◽  
Caroline Durif ◽  
Jorg Doornbos ◽  
Kees Noorlander ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Thyroid Hormones ◽  
Anguilla Anguilla ◽  
Gonadal Development ◽  
Maximum Activity ◽  
European Eel ◽  
Pca Analysis ◽  
Silver Eel ◽  
Yellow Eel ◽  
Endocrine Profiles

AbstractThe transformation of yellow eel into silver eel is called 'silvering', and takes place prior to migration. This is the first study to provide hormonal profiles of European eel (Anguilla anguilla L.) during silvering. This transformation occurs in association with hormonal surges of testosterone (T) and estradiol (E2) but not with thyroid hormones (TH) and growth hormone (GH) which have a maximum activity in spring and a minimum activity in summer and autumn. It is therefore suggested THs and GH are not important for eel gonadal development in the autumn. Based on PCA analysis with physiological, morphological and endocrinological parameters it is concluded that the transition is gradual and that eels go through several stages.

On the distribution of the European eel (Anguilla anguilla) and its fisheries

2003 ◽  
Vol 60 (7) ◽  
pp. 787-799 ◽  
Author(s):  
Willem Dekker
Keyword(s):  
Meta Analysis ◽  
Anguilla Anguilla ◽  
Western Mediterranean ◽  
Qualitative Description ◽  
Suitable Habitat ◽  
European Eel ◽  
Silver Eel ◽  
Southern Limit ◽  
Glass Eel ◽  
The North

For the distribution of the European eel (Anguilla anguilla), only Schmidt (1909) has conducted substantial investigations, yielding a qualitative description (Atlantic and Mediterranean coasts of Europe and Northern Africa). In this article, a meta-analysis of reported fishing yields is presented, showing a major concentration of glass eel yield in the Bay of Biscay (and possibly farther south) and of yellow and (or) silver eel yield in the western Mediterranean. Fisheries target the glass eel stage at highest stock density and shift to the silver eel stage at low density. Because there is no suitable habitat in the Sahara, the southern limit is, contrary to Schmidt's belief, primarily determined by continental conditions. From the centre of the distribution to the north, a long and slow decline in density occurs. The mismatch between northern temperatures and the species' preference, in combination with the very low abundance, indicates that the European eel is best seen as a warm-water species, like most other eel species (Anguilla spp.), showing a considerable northern diaspora.

scholarly journals Vitamin A Ikan Sidat (Anguilla Marmorata) Asal Sungai Palu Dan Danau Poso

2020 ◽  
Vol 2 (1) ◽  
pp. 24-30
Author(s):  
Jamaluddin Jamaluddin ◽  
Agustinus Widodo ◽  
Nurul Mufliha
Keyword(s):  
Vitamin A ◽  
Silver Eel ◽  
Glass Eel ◽  
Purposive Sampling ◽  
Yellow Eel ◽  
Anguilla Marmorata

Pendahuluan & Tujuan: Ikan sidat (Anguilla marmorata) memiliki keunggulan gizi atau nutrisi yang tinggi seperti protein, mineral, asam lemak dan salah satunya yaitu vitamin A. Penelitian ini  bertujuan untuk membandingkan jumlah kadar vitamin A ikan sidat (Anguilla marmorata) fase glass eel, yellow eel , silver eel  asal Sungai Palu dan Danau Poso. Bahan dan Metode: Bahan yang digunakan dalam penelitian yaitu Ikan sidat (Anguilla marmorata) berukuran Glass eel, Yellow eel, Silver eel yang berasal dari Sungai Palu dan Danau Poso, Ethanol, KOH, n-Hexane, BHT (Butil Hidroksil Toluen), Methanol. Teknik pengambilan sampel menggunakan purposive sampling melihat berdasarkan jenis berat, ukuran dan lokasi pengambilan. Metode yang digunakan yaitu Kromatografi Cair Kinerja Tinggi (KCKT) dimana sebelumnya dilakukan uji saponifikasi (penyabunan) pada sampel ikan sidat. Hasil: Vitamin A pada ikan sidat asal Sungai Palu fase glass eel sebesar 4,01 mg/kg (1336,67 IU/100 gram), yellow eel sebesar 7,26 mg/kg (2420 IU/100 gram), silver eel sebesar 9,73 mg/kg (3243,34 IU/100 gram). Vitamin A pada ikan sidat asal Danau Poso fase glass eel sebesar 0,22 mg/kg (73,34 IU/100 gram), yellow eel 7,16 mg/kg (2386,67 IU/100 gram), silver eel sebesar 11,3 mg/kg (3766,67 IU/100 gram). Kesimpulan: Kadar vitamin A ikan sidat fase glass eel asal Sungai Palu dan Danau Poso berbeda signifikan.

Kadar Albumin Pada Ikan Sidat Anguilla marmorata Q Gaimard dan Anguilla bicolor Asal Sungai Palu dan Danau Poso

2020 ◽  
Vol 4 (1) ◽  
pp. 60-68
Author(s):  
Jamaluddin Jamaluddin ◽  
Gugun Gunawan ◽  
Siti Nurhafsah ◽  
Padhlun A Jerni ◽  
Dytha Okvhyanitha ◽  
...  
Keyword(s):  
Docosahexaenoic Acid ◽  
Vitamin A ◽  
Bromocresol Green ◽  
Vitamin B ◽  
Silver Eel ◽  
Glass Eel ◽  
Purposive Sampling ◽  
Yellow Eel ◽  
Anguilla Marmorata

Ikan sidat termasuk ikan yang memiliki kandungan gizi yang tinggi seperti vitamin A, vitamin B, DHA(Docosahexaenoic acid), EPA(Eicosapentaeonic acid), dan protein albumin. Albumin memiliki peranan penting sebagai sarana pada proses transportasi dalam darah, pembentukan jaringan tubuh yang baru pada masa pertumbuhan, senyawa proteksi hati dan juga bermanfaat dalam proses penyembuhan luka pada pasien pasca operasi. Penelitian ini bertujuan untuk mengetahui perbandingan kadar albumin ikan sidat Anguilla marmorata dan Anguilla bicolor pada fase glass eel, elver, yellow eel dan silver eel asal Sungai Palu dan Danau Poso. Sampel diambil menggunakan metode purposive sampling berdasarkan pada jenis, berat, ukuran, dan lokasi pengambilan. Pengujian kadar albumin ditentukan dengan menggunakan metode Bromocresol green dengan alat fotometer dan hasil penelitian menunjukkan bahwa kadar albumin tertinggi terdapat pada fase silver eel, yakni sebanyak 1,62 gram / 100 gram pada Anguilla marmorata asal Danau Poso dan kadar paling rendah terdapat pada fase elver sebanyak 0,24 gram / 100 gram pada Anguilla bicolor asal Danau Poso. Hal ini menunjukkan bahwa spesies Anguilla marmorata memiliki kadar albumin yang lebih tingi dari Anguilla bicolor.

scholarly journals Vitamin A Ikan Sidat (Anguilla Bicolor) Asal Danau Poso Sulawesi Tengah

2020 ◽  
Vol 3 (2) ◽  
pp. 63-66
Author(s):  
Nur Pita Sari ◽  
Jamaluddin Jamaluddin ◽  
Agustinus Widodo
Keyword(s):  
Vitamin A ◽  
Silver Eel ◽  
Glass Eel ◽  
Purposive Sampling ◽  
Yellow Eel

Ikan sidat (Anguilla bicolor) memiliki nilai gizi yang sangat tinggi antara lain vitamin larut air (B dan C) dan larut lemak A, D, E, dan K. Vitamin A merupakan salah satu vitamin yang diperlukan oleh tubuh untuk membantu pembentukan jaringan tubuh, tulang, meningkatkan penglihatan dan ketajaman mata, memelihara kesehatan kulit dan rambut, meningkatkan kekebalan tubuh, anti kanker dan katarak. Penelitian ini bertujuan untuk mengetahui perbandingan kandungan vitamin A pada fase glass eel, yellow eel dan silver eel asal Danau Poso Sulawesi Tengah. Penelitian ini dilakukan di Laboratorium dengan pengambilan sampel menggunakan teknik Purposive sampling berdasarkan kriteria seperti jenis (Anguilla bicolor) umur (4,5 – 10 tahun) dan panjang (55 mm – 30 cm ) asal Danau Poso Sulawesi Tengah. Pengujian vitamin A dilakukan dengan menggunakan metode KCKT (Kromatografi Cair Kinerja Tinggi). Kadar vitamin A ikan sidat fase Glass eel sebanyak 24,36 mcg/100g, Yellow eel 204,53 mcg/100g, dan Silver eel 59,92 mcg/100g. Hasil statistik uji anova menunjukkan bahwa kadar vitamin A ikan sidat Anguilla bicolor fase Glass eel, Yellow eel, dan Silver eel berbeda signifikan (P=0,000). Ikan sidat (Anguilla bicolor) fase Glass eel, Yellow eel dan Silver eel asal Danau Poso Sulawesi Tengah dapat dijadikan sumber vitamin A baik dalam bentuk olahan makanan maupun produk

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