Size selectivity of Korean flounder (Glyptocephalus stelleri) by gillnets and trammel nets using an extension of SELECT for experiments with differing mesh sizes

Park, Hae-Hoon; Millar, Russell B.; Bae, Bong-Seong; H, An; Chun, Young Yull; Yang, Jae Hyeong; Yoon, Sang Chul

doi:10.1016/j.fishres.2010.10.020

Cited by 19 publications

(14 citation statements)

References 9 publications

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“…Estimated model length for 4 cm mesh size was adapted as scale proportionally for all other mesh sizes (i.e. 5, 6, 7, 8 and 9 cm) (Park et al, 2011). The K-S test showed differences between all paired comparisons of length frequency distributions per mesh sizes of gillnets (Table 4).…”

Section: Resultsmentioning

confidence: 99%

“…R codes are developed by Millar (2010Millar ( , 2011. Length selectivity of each mesh size was described by five different models (normal location, normal scale, gamma, lognormal and bi-normal) of the SELECT method (Millar & Fryer, 1999;Park et al, 2011). The Kolmogorov-Smirnov (K-S) test was used to determine differences between pairs of size frequency distributions per mesh size of the net (Karakulak & Erk, 2008;Siegel & Castellan, 1989).…”

Section: Methodsmentioning

confidence: 99%

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Cılbız¹,

Uysal²,

Alp³

et al. 2017

Turk. J. Fish. Aquat. Sci.

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The pike is one of the most valuable freshwater fish species in Turkey. This study was carried out in order to estimate the selectivity properties of gillnet used in pike (Esox lucius L., 1758) fishing in Çivril Lake, Turkey. The study was performed between January 2005 and December 2005 and selectivity estimates were based on six different monofilament gillnet mesh sizes (i.e. 4, 5, 6, 7, 8 and 9 cm). The SELECT method was used to estimated the selectivity parameters. According to the bi-normal model, optimum model lengths for 4, 5, 6, 7, 8 and 9 cm mesh sizes were determined as 20. 99, 26.24, 31.49, 36.73, 41.98 and 47.23 cm respectively. When considering minimum landing size, the findings of the study showed that the use of gillnets of mesh size less than 8 cm should be prohibited for the fishing of E. lucius in Çivril Lake.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Cılbız¹,

Uysal²,

Alp³

et al. 2017

Turk. J. Fish. Aquat. Sci.

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“…Similarly, the Bi-modal model has been reported as the most appropriate model in many different studies (MothPoulsen, 2003;Erzini et al, 2006;Karakulak and Erk, 2008;Akamca et al, 2010;Park et al, 2011) for …”

Section: Discussionmentioning

confidence: 96%

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Kalayci¹,

Yeşılçıçek²

2012

Turk. J. Fish. Aquat. Sci.

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In the present study, the selectivity properties of trammel nets used in red mullet fishery by local fishermen were investigated. Trammel nets with five different mesh sizes (16, 17, 18, 20 and 22 mm bar length) in the inner panels and 100 mm mesh size in outer panel were used for fishing trial in the eastern Black Sea coast of Turkey between June 2010 and June 2011. Selectivity parameters for the target species Mullus barbatus, as well as Scorpaena porcus and Solea solea were estimated. Five different selectivity models (normal scale, normal location, gamma, log-normal and bi-modal) in the SELECT method were fitted to data sets. The bi-modal model gave the best fit for three species studied as it had the lowest deviance value. The optimum lengths for red mullet for the Bi-Modal model corresponding to 16, 17, 18, 20 and 22 mm mesh sizes were found as 15. 49, 16.46, 17.42, 19.36 and 21.30 cm, respectively. The minimum mesh size of the trammel nets especially used in red mullet fishery must be 18 mm in order to protect fish stocks and to secure a profitable fisheries and optimum catch efficiency for the future.Keywords: Mullus barbatus, selectivity, trammel net, SELECT, Black Sea. Doğu Karadeniz'de Barbunya Balığı (Mullus barbatus) Avcılığında Kullanılan Fanyalı Uzatma Ağların Seçiciliğinin Araştırılması ÖzetBu çalışmada, bölge balıkçıları tarafından barbunya avcılığında kullanılan fanyalı uzatma ağlarının seçicilik özellikleri incelenmiştir. Türkiye'nin Doğu Karadeniz kıyılarında Haziran 2010 ve Haziran 2011 tarihleri arasında beş farklı tür ağ göz açıklığına (16, 17, 18, 20 ve 22 mm kenar uzunluğu) ve 100 mm göz açıklığına sahip fanyalı ağlar avcılık denemeleri için kullanılmıştır. Hedef tür barbunyanın yanı sıra, iskorpit ve dil balığı için de seçicilik parametreleri tahmin edilmiştir. SELECT metodunda değerlendirilen beş farklı seçicilik modelinin (normal scale, normal location, gamma, log-normal ve bi-modal) verilere uygunluğu değerlendirilmiştir. Her üç balık türü için de en düşük sapma değerine sahip olan Bi-Modal modelin, uygun model olduğu belirlenmiştir. Bi-Modal modele göre barbunya için 16, 17, 18, 20 ve 22 mm göz açıklıklarına göre optimum boylar sırasıyla 15,49, 16,46, 17,42, 19,36 ve 21,30 cm olarak bulunmuştur. Balık stoklarını korumak, gelecek için sürdürülebilir balıkçılık ve optimum av verimliliğini sağlamak için özellikle barbunya avcılığında kullanılan fanyalı ağların minimum göz açıklığı 18 mm olmalıdır.

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“…The difference between the modal lengths was 1.45 cm for the 22 mm mesh size. PARK et al (2011) found that the size selectivity of the trammel net and gillnet was significantly different with only 0.2 cm difference in the modal length. In terms of fisheries management, 1.2 years are required for a bogue to grow from 21.86 to 23.31 cm, recalculated from the von Bertalanffy growth parameters provided by MONTEIRO et al (2006).…”

Section: Equal Fishing Powersmentioning

confidence: 89%

Effect of twine thickness on selectivity of gillnets for bogue, Boops boops,in Turkish waters

et al. 2011

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To investigate the effect of twine thickness on the selectivity of multifilament gillnet targeting bogue,Boops boops L., four different stations were sampled between March and November 2008 in the northern Aegean Sea. Gillnets with 22, 23, and 25 mm nominal mesh size (bar length) each having two different twine thicknesses (approximately 0.45 mm and 0.54 mm ∅) were applied for this purpose. The deviances from the SELECT method revealed that lognormal models provided the best fits for both of the twine thicknesses. Results from the two-way ANOVA analyses revealed that the mean total lengths increased with the mesh size (F = 87.36; df = 2; P < 0.0001) and decreased with the twine thickness (F = 46.12; df = 1; P < 0.0001). The 22 mm mesh size net (0.45 mm ∅) captured significantly larger fish than the 23 mm mesh size net (0.54 mm ∅) probably due to the higher elasticity and flexibility of the thinner twine. Thus, fisheries managers should take into consideration the twine thickness while advising mesh size regulations in gillnet fisheries.

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Size selectivity of Korean flounder (Glyptocephalus stelleri) by gillnets and trammel nets using an extension of SELECT for experiments with differing mesh sizes

Cited by 19 publications

References 9 publications

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Effect of twine thickness on selectivity of gillnets for bogue, Boops boops,in Turkish waters

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