Journals / Su Ürünleri Dergisi / 2003 / Cilt: 20 - Sayı: 1

An equation aimed at appropriateness to our country's conditions for $L_50$ parameter one of the performance criterian of towel fishing gear and to estimate the total fish catch under legal size

Sürütme ağlarının seçicilik performans kriterlerinden $L_50$ parametresinin ülkemiz koşullarına uygunluğu ve yasal boyun altında avlanan balık miktarının tahminine yönelik bir eşitlik (Pi)

Pages
295–302
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In this study, one of the rural affairs in the circular; the relationship between the article of "in the total fishing number of under legal size can be maximum 5% rate" and then suggested to use an equation in calculation the rate of catched under legal size individuals in total catch.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The $L_{50}$ parameter, is one of the major parameter which uses in determination of the codend selectivity parameters in towed fishing gear.
📊
Key Findings & Data:Theorically, 50% of the individuals, which have lengths are represented by Lso parameter, achieved to escape; the other 50% are accepted to be catched.
💡
Conclusion & Impact:In this study, one of the rural affairs in the circular; the relationship between the article of "in the total fishing number of under legal size can be maximum 5% rate" and then suggested to use an equation in calculation the rate of catched under legal size individuals in total catch.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:balık avlama · tuzak ağlar · balık avlama ekipmanı

Abstract

The $L_{50}$ parameter, is one of the major parameter which uses in determination of the codend selectivity parameters in towed fishing gear. Theorically, 50% of the individuals, which have lengths are represented by Lso parameter, achieved to escape; the other 50% are accepted to be catched. Generally most of the researchers have an opinion that if the $L_{50}$ value for a fish species is equal or above of the legal size, the objective codend has efficient selectivity characteristics. In our country, the sport and commercial fishing in seas and inland waters is legalized with the legal principles by the Republic of Turkey Ministry of Agriculture and Rural Affairs and planned by the periods have involved the two fishing period then published as a circular. In this study, one of the rural affairs in the circular; the relationship between the article of "in the total fishing number of under legal size can be maximum 5% rate" and then suggested to use an equation in calculation the rate of catched under legal size individuals in total catch.

Özet

$L_{50}$ parametresi, sürükleme yoluyla avcılık yapan takımların torba seçicilik performans kriterlerinin belirlenmesinde kullanılan en belli başlı parametrelerden biridir. Teorik olarak Lso parametresi ile temsil edilen boya sahip bireylerin %50'sinin kaçmayı başardığı, geri kalan %50'sinin ise yakalandığı kabul edilir. Bir çok araştırıcı; bir balık türü için elde edilen L5o değeri, yasal boya eşit ya da üzerinde ise, ele alınan torbanın yeterli seçicilik özelliklerine sahip olduğunu kabullenir. Ülkemizde, denizlerde ve içsularda amatör ve ticari olarak yapılan su ürünleri avcılığı, T.C. Tarım ve Köyisleri Bakanlığı tarafından oluşturulan yasal esaslarla düzenlenir ve iki av sezonunu kapsayan periyodlar halinde planlanıp sirküler olarak yayınlanır. Bu çalışmada, sirkülerde bulunan yasal düzenlemelerden biri olan; "toplam av içinde sayıca en fazla %5 oranında küçük boylu bireylere müsaade edilir" maddesi ile $L_{50}$ parametresi arasındaki ilişki araştırılmış ve toplam av içinde yakalanan yasal boyun altındaki bireylerin oranının hesaplanmasında kullanılabilecek bir eşitlik önerilmiştir.

🔖

Cite This Article

İLKYAZ, A. T. (2003). An equation aimed at appropriateness to our country's conditions for $L_50$ parameter one of the performance criterian of towel fishing gear and to estimate the total fish catch under legal size. Su Ürünleri Dergisi, Cilt: 20 - Sayı: 1, 295–302. https://ajindex.com/articles/311641

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (4)

  1. Elbek, A.G., Oktay, E., Saygı, H., 2002. Statistic (in Turkish), E.U. Fisheries Faculty, Pub. Num. 19-6,
  2. Bornova. Gurbet, R., Hoşsucu, H., İlkyaz, A.T., Özekinci, U., 1997. The study on the comparison of selectivity of 40 and 44 mm mesh size in the trouser bottom trawls (in Turkish). Mediterranean Fisheries Congress, 9-11th April, E.U. Fisheries Faculty, Bornova. İlkyaz, A.T., Metin, C, Kmacıgil, H.T., 1998. A Computer Program About The Calculation of The Selectivity Parameters In Towed Fishing Gear Illustrated With Cover Cod-End Method (L50 Version: 1.0.0) (in Turkish). Ege University, Faculty of Fisheries, Journal of Fisheries and Aquatic Sciences, 15:(3-4), 305-314.
  3. Sparre, P., Venema,S.C, 1992. Introduction to Tropical Fish Stock Assessment, Part I -Manual, FAO Fisheries Technical Paper 306/1, Roma. TKB, 2002. The commercial fish catching regulations in seas and inland waters for 2002-2004 fishing period: Circular No. 35/1 (in Turkish). Republic of Turkey, Ministry of Agriculture and Rural Affairs, General Directorate of Conservation and Inspection, Ankara, 84 pp Tokaç, A., Tosunoğlu, Z., 1997. The Selection Criteria's of Red Mullet (Mullus barbatus L., 1758) in the bottom trawl nets (in Turkish). Ege University, Faculty of Fisheries, Journal of Fisheries and Aquatic Sciences, 14:(3-4), 289-306.
  4. Tosunoğlu, Z., Tokaç, A., 1997. The improving of cod-end selectivity in the bottom trawl nets (in Turkish). Mediterranean Fisheries Congress, 9-11th April, E.U. Fisheries Faculty, Bornova. Wileman, D.A.; Ferro, R.S.T.; Fonteyne, R.; Millar, R.B., (eds.) 1996: Manual of Methods of Measuring the Selectivity of Towed Fishing Gears. Copenhagen: ICES Cooperative Research Report No. 215, 126 pp.