Journals / Turkish Journal of Fisheries and Aquatic Sciences / 2014 / Cilt: 14 - Sayı: 3

Kültürü Yapılan Fangrilerde (Pagrus pagrus) Erken Dönem Morfolojik Gelişim ve Allometrik Büyüme Modelleri

Early Morphological Development and Allometric Growth Patterns in Hatchery-Reared Red Porgy (Pagrus pagrus)

Pages
817–824
DOI
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⚡ TL;DR(Too Long; Didn't Read)

Inflections in body proportion changes occurred mainly at TL values of 3.74, 4.22 and 5.56 mm, coinciding with mouth opening, initial swimbladder inflation and flexion of notochord, respectively.

📌 3 Key Takeaways

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Objective & Hypothesis:Morphological development and allometric growth were investigated in the red porgy, Pagrus pagrus, during larval development until the end of weaning at 46 days after hatching (DAH).
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Key Findings & Data:Total length (TL) of newly hatched larvae was 2.77±0.09 mm (mean±SE).
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Conclusion & Impact:Inflections in body proportion changes occurred mainly at TL values of 3.74, 4.22 and 5.56 mm, coinciding with mouth opening, initial swimbladder inflation and flexion of notochord, respectively.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Morphological development and allometric growth were investigated in the red porgy, Pagrus pagrus, during larval development until the end of weaning at 46 days after hatching (DAH). Total length (TL) of newly hatched larvae was 2.77±0.09 mm (mean±SE). Onset of exogenous feeding occurred at 4 DAH (3.74±0.13 mm TL). Initial swimbladder inflation occured at 10 DAH (4.22±0.18 mm TL) and post-inflation became more elongate at 16 DAH (4.95±0.26 mm TL). Notochord flexion occurred between 22 DAH (5.56±0.43 mm TL) and 34 DAH (8.22±0.63 mm TL). At the end of the weaning at 46 DAH, TL of larvae was 15.81±1.36 mm. According to individual measurements of a total of 1026 larvae of 18 body parameters for allometric growth, in 19 of 35 respective regression equations, the allometry coefficients were positive, while coefficients of 7 equations showed negative allometry. The majority of all allometric changes from inflection point were expressed during the larval stage and were integrated with the metamorphosis stage. Inflections in body proportion changes occurred mainly at TL values of 3.74, 4.22 and 5.56 mm, coinciding with mouth opening, initial swimbladder inflation and flexion of notochord, respectively.

Özet

Bu çalışmada, kültürü yapılan fangrilerde Pagrus pagrus larval dönem boyunca toz yem girişinin sona erdiği 46. güne kadar erken dönem morfolojik gelişim ve allometrik büyüme modelleri incelenmiştir. Yumurtadan yeni çıkan larvalarda total boy (TB) 2,77±0,09 mm (ort±SH) olarak ölçülmüştür. İlk hava kesesi şişmesi 10. günde (4,22±0,18 mm TB) meydana gelmiş ve kesede uzama şişme sonrası 16. günde (4,95±0,26 mm TB) tespit edilmiştir. Notokorda bükülmesi 22. gün (5,56±0,43 mm TB) ile 34. günler (8,22±0,63 mm TB) arasında izlenmiş ve toz yem giriş periyodunun sonu olan 46. günde larvalarda total boy 15,81±1,36 mm ulaşmıştır. Allometrik büyüme için toplam 1026 larvada 18 vücıt parametresi incelenmiş, 35 adet regresyon eşitliğinden 19 adedinde allometri katsayısı pozitif tespit edilirken 7 adet eşitlikte ise negatif allometri belirlenmiştir. Regresyon grafiklerindeki kırılma noktalarındaki allometrik değişimlerin büyük çoğunluğu larval dönemde meydana gelmiş ve metamorfoz dönemi ile ilişkili bulunmuştur. Vücut bölümlerine bağlı olarak regresyon grafiklerindeki kırılmalar 3,74, 4,22 ve 5,56 mm TB değerlerinde olmuş, sırasıyla ağız açılımı, ilk hava kesesi şişmesi ve notokorda bükülmesi ile eş zamanlı olarak tespit edilmiştir.

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Cite This Article

YILDIRIM, Ş., ÇOBAN, D., SUZER, C., KIRIM, B., FIRAT, M. K., SAKA, Ş. (2014). Kültürü Yapılan Fangrilerde (Pagrus pagrus) Erken Dönem Morfolojik Gelişim ve Allometrik Büyüme Modelleri. Turkish Journal of Fisheries and Aquatic Sciences, Cilt: 14 - Sayı: 3, 817–824. https://ajindex.com/articles/408439

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