Effects of mesh size on catch efficiency and catch composition of multifilament trammel nets in Beymelek Lagoon (Antalya, Türkiye)

Ali Özbolat; Cenkmen R. Beğburs

doi:10.33714/masteb.2005705

Effects of mesh size on catch efficiency and catch composition of multifilament trammel nets in Beymelek Lagoon (Antalya, Türkiye)

Abstract

Mesh size strongly influences catch efficiency and catch composition in trammel-net fisheries. This study evaluated the effects of four different inner panel mesh sizes (18, 22, 26, and 30 mm) on catch efficiency, catch composition, and discard proportions of multifilament trammel nets in Beymelek Lagoon (Antalya, Türkiye). Samples were obtained at four stations monthly from January to December 2019, using the haul-seine (voli) method. Catch per unit effort (CPUE) was analysed using a linear mixed-effects model with mesh size, sampling month, and sampling station as fixed effects and fishing operation as a random effect. Mesh size affected log-transformed CPUE (P <0.001), an effect that represents the combined influence of mesh size and panel position (confounded by the fixed panel order) rather than mesh size alone. Sampling month and station also contributed to variation in catches. Estimated marginal means indicated that the 18-mm mesh had a CPUE significantly lower than the 22, 26, and 30 mm meshes, but the three larger sizes were not significantly different from one another. The weight-based discard proportion was highest at the 18 mm mesh (14.4%) and significantly higher than at the 22, 26 and 30 mm meshes, which did not differ from one another; by number, discard proportions did not differ significantly among meshes once over-dispersion was accounted for. Increasing the inner-panel mesh size from 18 to 22 mm was associated with higher catch efficiency. Both catch efficiency and discard composition should therefore be considered when selecting an appropriate mesh size to support the sustainable management of Mediterranean lagoon fisheries.

Keywords

Supporting Institution

This study did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. Field activities were carried out within the routine research programme of the Mediterranean Fisheries Research, Production and Training Institute.

Project Number

This study did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Ethical Statement

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. The study was based on routine fishery sampling of wild specimens, and for this type of study formal consent is not required.

Thanks

The authors sincerely thank the managers and employees of the Mediterranean Fisheries Research, Production, and Training Institute and its technical staff for their support during the field activities. This article was derived from the MSc Thesis of the first author.

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Details

Primary Language

English

Subjects

Fisheries Management

Journal Section

Research Article

Authors

Ali Özbolat
0000-0002-9384-5058
Türkiye

Cenkmen R. Beğburs ^*
0000-0002-6426-721X
Türkiye

Early Pub Date

September 5, 2026

Publication Date

-

Submission Date

July 29, 2026

Acceptance Date

September 1, 2026

Published in Issue

Year 2026 Number: Advanced Online Publication

DOI

https://doi.org/10.33714/masteb.2005705

IZ

https://izlik.org/JA76UE79SP

Cite

RIS / Bibtex

APA

Özbolat, A., & Beğburs, C. R. (2026). Effects of mesh size on catch efficiency and catch composition of multifilament trammel nets in Beymelek Lagoon (Antalya, Türkiye). Marine Science and Technology Bulletin, Advanced Online Publication, 246-260. https://doi.org/10.33714/masteb.2005705

AMA

1.Özbolat A, Beğburs CR. Effects of mesh size on catch efficiency and catch composition of multifilament trammel nets in Beymelek Lagoon (Antalya, Türkiye). Mar. Sci. Tech. Bull. 2026;(Advanced Online Publication):246-260. doi:10.33714/masteb.2005705

Chicago

Özbolat, Ali, and Cenkmen R. Beğburs. 2026. “Effects of Mesh Size on Catch Efficiency and Catch Composition of Multifilament Trammel Nets in Beymelek Lagoon (Antalya, Türkiye)”. Marine Science and Technology Bulletin, no. Advanced Online Publication: 246-60. https://doi.org/10.33714/masteb.2005705.

EndNote

Özbolat A, Beğburs CR (September 1, 2026) Effects of mesh size on catch efficiency and catch composition of multifilament trammel nets in Beymelek Lagoon (Antalya, Türkiye). Marine Science and Technology Bulletin Advanced Online Publication 246–260.

IEEE

[1]A. Özbolat and C. R. Beğburs, “Effects of mesh size on catch efficiency and catch composition of multifilament trammel nets in Beymelek Lagoon (Antalya, Türkiye)”, Mar. Sci. Tech. Bull., no. Advanced Online Publication, pp. 246–260, Sept. 2026, doi: 10.33714/masteb.2005705.

ISNAD

Özbolat, Ali - Beğburs, Cenkmen R. “Effects of Mesh Size on Catch Efficiency and Catch Composition of Multifilament Trammel Nets in Beymelek Lagoon (Antalya, Türkiye)”. Marine Science and Technology Bulletin. Advanced Online Publication (September 1, 2026): 246-260. https://doi.org/10.33714/masteb.2005705.

JAMA

1.Özbolat A, Beğburs CR. Effects of mesh size on catch efficiency and catch composition of multifilament trammel nets in Beymelek Lagoon (Antalya, Türkiye). Mar. Sci. Tech. Bull. 2026;:246–260.

MLA

Özbolat, Ali, and Cenkmen R. Beğburs. “Effects of Mesh Size on Catch Efficiency and Catch Composition of Multifilament Trammel Nets in Beymelek Lagoon (Antalya, Türkiye)”. Marine Science and Technology Bulletin, no. Advanced Online Publication, Sept. 2026, pp. 246-60, doi:10.33714/masteb.2005705.

Vancouver

1.Ali Özbolat, Cenkmen R. Beğburs. Effects of mesh size on catch efficiency and catch composition of multifilament trammel nets in Beymelek Lagoon (Antalya, Türkiye). Mar. Sci. Tech. Bull. 2026 Sep. 1;(Advanced Online Publication):246-60. doi:10.33714/masteb.2005705