Journals / Su Ürünleri Dergisi / 2011 / Cilt: 28 - Sayı: 3

The relationships between length-weight, and meat content of freshwater crayfish (Astacus leptodactylus Eschscholtz, 1823) caught from Gaga Lake (Ordu-Turkey).

Gaga Gölü (Ordu, Türkiye)’nden yakalanan tatlısu ıstakozu (Astacus leptodactylus Eschscholtz, 1823)’nda ağırlık-uzunluk ilişkisi ve et verimi

Pages
75–80
DOI
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⚡ TL;DR(Too Long; Didn't Read)

In the comparison of carapace width, abdomen length, abdomen width, total length, chelae length, cheliped width and cheliped length between males and females; it was found that significantly bigger those of the females (P<0.001 for each case).

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, length-weight relation and meat content were investigated in freshwater crayfish (Astacus leptodactylus Eschscholtz, 1823) caught from Gaga Lake.
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Key Findings & Data:In the comparison of carapace width, abdomen length, abdomen width, total length, chelae length, cheliped width and cheliped length between males and females; it was found that significantly bigger those of the females (P<0.001 for each case).
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Conclusion & Impact:On the other hand, as regarding total meat content there was a positive allometric growth in the total meat content of males (slopemales= 3.18), but there was a negative allometric growth in the total meat content of females (slope females= 1.92), and it was found that the abdomen, chelae and total meat content of males was significantly higher than those of the females (P<0.001 for each case).
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, length-weight relation and meat content were investigated in freshwater crayfish (Astacus leptodactylus Eschscholtz, 1823) caught from Gaga Lake. In the comparison of carapace width, abdomen length, abdomen width, total length, chelae length, cheliped width and cheliped length between males and females; it was found that significantly bigger those of the females (P<0.001 for each case). The results showed that there was a linear relationship (rmales= 0.87 and rfemales= 0.90) between carapace length and body weight of males and females. In addition, regression coefficients showed that negative allometric body weight increase occurs in both sexes (slope males= 2.55 and slopefemales= 2.49). Furthermore, regression analyzes showed that while there was a linear relationship (rmales= 0.75) between abdomen meat content and carapace length in males, there was not a linear relation (rfemales= 0.48) in that of females. The results also showed that, there was a negative allometric growth in abdomen meat content of male and female (slopemales= 1.83 and slopefemales= 1.23), but there was a positive allometric growth in the chelea meat content of the females and males (slopemales= 4.79 and slopefemales= 3.73). On the other hand, as regarding total meat content there was a positive allometric growth in the total meat content of males (slopemales= 3.18), but there was a negative allometric growth in the total meat content of females (slope females= 1.92), and it was found that the abdomen, chelae and total meat content of males was significantly higher than those of the females (P<0.001 for each case).

Özet

Bu çalışmada Gaga Gölü’nden yakalanan tatlısu ıstakozu (Astacus leptodactylus)’nun ağırlık-uzunluk ilişkisi ve et verimi incelendi. Aynı karapaks uzunluk grubundaki erkek ve dişi tatlısu ıstakozlarının (kerevit) karapaks genişliği, abdomen uzunluğu, abdomen genişliği, toplam uzunluğu, kıskaç uzunluğu, kıskaç genişliği ve kıskaç ayak uzunluğu karşılaştırıldığında erkeklerin dişilerden istatistiksel olarak önemli derecede uzun olduğu belirlendi (P<0,001 her bir durum için). Erkek ve dişi kerevitlerde karapaks uzunluğu ile vücut ağırlığı arasında doğrusal bir ilişkinin olduğu bulundu (rerkekler= 0,87 ve rdişiler= 0,90). Bununla birlikte, regresyon analizleri hem erkek hem de dişi kerevitlerde negatif allometrik ağırlık artışının olduğunu gösterdi (b değerierkekler= 2,55 ve b değeridişiler= 2,49). Ayrıca, regresyon analizleri sonucunda erkek kerevitlerin abdomen et miktarının karapaks uzunluğu ile doğru orantılı olarak arttığı belirlenirken dişi kerevitlerde ise linear ilişki görülmedi (rerkekler= 0,75 ve rdişiler= 0,48). Öte yandan, çalışma sonucunda erkek ve dişilerde abdomen etinin negatif allometrik büyüme gösterdiği (b değerierkekler= 1,8394 ve b değeridişiler= 1,2317), kıskaçlardan elde edilen et miktarının ise pozitif allometrik büyüme gösterdiği bulundu (b değerierkekler= 4,7987 ve b değeridişiler= 3,7347). Diğer taraftan, erkeklerde toplam et miktarında pozitif allometrik büyüme gözlemlenirken dişilerde ise negatif allometrik büyüme gözlemlendi (b değeri erkekler= 3,1872 ve b değeridişiler= 1,9240) ve erkek kerevitlerin abdomen, kıskaç ve toplam et miktarının dişi kerevitlerden önemli derecede fazla olduğu bulundu (P<0,001 her bir durum için).

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Cite This Article

YILMAZ, E., HARLIOĞLU, A. G., YILMAZ, A. (2011). The relationships between length-weight, and meat content of freshwater crayfish (Astacus leptodactylus Eschscholtz, 1823) caught from Gaga Lake (Ordu-Turkey).. Su Ürünleri Dergisi, Cilt: 28 - Sayı: 3, 75–80. https://ajindex.com/articles/311180

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