Image-based quantification of size, color, and image texture in meagre (Argyrosomus regius (Asso, 1801)) reared in different culture systems

Canan Ünlü; Erkan Gümüş; Bahar Gümüş; Murat Ömer Balaban

doi:10.12714/egejfas.43.1.09

TR EN

Farklı kültür koşullarında yetiştirilen granyöz’ün (Argyrosomus regius (Asso, 1801)) boyutu, deri rengi ve görsel dokusunun görüntü tabanlı nicel analizi

Öz

Granyöz hem balıkçılık hem de su ürünleri yetiştiriciliği açısından önemli bir balıktır. Granyöz balığının görsel özellikleri, tüketicilerin satın alma niyeti için önemlidir. Kafeslerde ve toprak havuzlarda yetiştirilen bütün granyöz balıkları, görsel özellikler (uzunluk, görüş alanı, sağ ve sol tarafların rengi, görüntü dokusu) açısından görüntü analizi ile değerlendirilmiştir. Balıklar tartıldıktan sonra her iki tarafının görüntüleri alınmıştır. Ağırlık (W) ve uzunluk (L) verileri, W = A LB güç denkleminden yararlanılarak değerlendirilmiştir. Kafes ve toprak havuz balıkları için B değerleri sırasıyla 2,95 ve 2,93’tür. Ağırlık ve görüş alanı arasındaki güç uyumunun R2 değerleri kafes balıkları için 0,976, toprak havuz balıkları için ise 0,983’tür. Çalışmada ortaya konan iki hipotezden birincisi, kafes ve toprak havuzda yetiştirilen balıkların renklerinin farklı olmadığıdır. İkinci ise, her iki balık türü için de sağ ve sol tarafların renklerinin farklı olmadığıdır. Özellikle, kafes balıkları toprak havuzlarda yetiştirilen balıklardan daha hafiftir. Kafes balıklarının L*, a* ve b* değerleri toprak havuz balıklarının değerlerinden istatistiksel olarak farklıdır (p<0.05). Kafes ve toprak havuz balıklarının her iki tarafının a* değerleri ve kafes balıklarının her iki tarafının b* değerleri istatistiksel olarak farklı bulunmuştur (p<0.05). Kafes ve toprak havuz balıkları için sağ ve sol deri renkleri arasındaki Delta E değerleri sırasıyla 1,89 ve 1,78 olup yakından incelendiğinde gözle görülür bir fark olduğunu göstermektedir. Ayrıca, kafes balıkları için 53 Delta E değerinden 13'ü, toprak havuz balıkları için ise 66 Delta E değerinden 10'u 3'ten büyüktür. Kafes ve toprak havuz balıklarının doku değişim indeksi ve renk değişim indeksi istatistiksel olarak farklıdır (p<0.05). Bu, renk ve görüntü dokusunu değerlendirirken balığın her iki tarafının da dikkate alınması gerektiğini göstermektedir.

Anahtar Kelimeler

Image-based quantification of size, color, and image texture in meagre (Argyrosomus regius (Asso, 1801)) reared in different culture systems

Abstract

Meagre is an important fish both regarding fisheries and aquaculture. Visual attributes of whole meagre are important for the purchase intention of consumers. Whole meagre grown in cages and earthen ponds were evaluated by image analysis for visual attributes (length, view area, color of right and left sides, image texture). The fish were weighed, and images of both sides were taken. Weight W vs length L data were fitted a power equation W = A L^B. The B values for cage and earthen pond fish were 2.95 and 2.93, respectively. The R² values for power fit to weight vs view area were 0.976 for cage fish, and 0.983 for earthen pond fish, respectively. The 1^st null hypothesis was that the colors of cage and earthen pond-reared fish were not different. The 2^nd null hypothesis was that for both type fish the colors of the right and left colors were not different. Specifically, the cage fish were lighter than the earthen pond-reared fish. The L*, a* and b* values of cage fish were statistically different than those of earthen pond fish (p<0.05). The a* values of both sides of cage and earthen pond fish, and b* values of both sides of cage fish were statistically different (p<0.05). Delta E values between the right and left skin colors for cage and earthen pond fish were 1.89, and 1.78, respectively, suggesting noticeable difference upon close examination. Also, there were 13 out of 53 Delta E values greater than 3 for cage fish, and 10 out of 66 for earthen pond fish. Texture change index and color change index of cage and earthen pond fish were statistically different (p<0.05). This suggests considering both sides of the fish should be considered in evaluating color and image texture.

Keywords

References

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Details

Primary Language

English

Subjects

Pisciculture , Fisheries Technologies , Aquaculture and Fisheries (Other)

Journal Section

Research Article

Authors

Canan Ünlü
0009-0005-1521-0398
Türkiye

Erkan Gümüş
0000-0002-2679-8642
Türkiye

Bahar Gümüş ^*
0000-0001-9232-8481
Türkiye

Murat Ömer Balaban
0000-0003-4410-5245
New Zealand

Publication Date

March 7, 2026

Submission Date

November 3, 2025

Acceptance Date

February 9, 2026

Published in Issue

Year 2026 Volume: 43 Number: 1

DOI

https://doi.org/10.12714/egejfas.43.1.09

IZ

https://izlik.org/JA35BS73YT

Cite

RIS / Bibtex

APA

Ünlü, C., Gümüş, E., Gümüş, B., & Balaban, M. Ö. (2026). Image-based quantification of size, color, and image texture in meagre (Argyrosomus regius (Asso, 1801)) reared in different culture systems. Ege Journal of Fisheries and Aquatic Sciences, 43(1), 76-85. https://doi.org/10.12714/egejfas.43.1.09