özet
Araştırmada yayınların doğal ortamlarındaki geleme durumlarım anlamak
için yaş-boy, yaş-ağırlık ve boy ağırlık arasındaki ilişkiler üzerinde durulmuştur.
Ortalama konlüsyon katsayısı (A") 0.58 bulunmuştur. İğdır ovasında yayınların
üreme zamanı Mayıs-Haziran aylarına rastlamaktadır. Bu ekolojik şartlarda yayın
balıklarının erkekleri 2-3, dişileri ise 3-4 yaşlarında cinsi olgunluğa ulaşmaktadırlar.
Yayın balıklarında canlı ağırlık-ovaryum ağırlığı, canlı ağırhk-yumurta adedi
ve ovaryum ağırlığı-yumurta adedi arasında pozitif ilişkiler bulunmuş ve bu karekterler
arasındaki korelasyon katsayıları ise sırasıyla r=0.88, r=0.77 ve r~0.80
olarak hesaplanmıştır. Yayınların baş, iç organlar (gonad, dahil), yüzgeç, deri ve
karaciğer gibi vücut kısımlarının canlı ağırlıktaki payları sırasıyla % 18,65, °/0
14.98, % 4.03, % 3.89, % 0.08 bulunmuştur. Bu balıklarda ortalama kılçıklı et
randımanı ise % 56 civarında olmuştur. Yapılan hesaplamada eldeki materyalin
kg canlı ağırlık başına 12340 adet yumurta verdiği ve üreme mevsimindeki ortalama
yumurta çapının 2.5 mm. civarında olduğu bulunmuştur.
Summary
A Study on the Bio-Ecologica! and Economical Properties. of The Sheatish (Silurus glanis Lo) Lived in the Karasu Stream in lğdır Planin
In this research, the bio-ecological and some economical performans of
Silurus glımis L. (Sheatfish) lived in Karasu Stream in I~dJr Plain of the Eastem
Anatölia were studied.
The relationships between the length-weight, age-weight, and agelength were
determiııed to understand the rates of growth of Silurus gIan;s lived in natural en
vıronmenL Length of fishes may be determined with accuracy. Weight of fisbes
may be considered a function of the length. This relaliouship of the length and
weigbt was calculated by using the following formula.
Log W = logc + n log L. in whicb
W = weight, L= length, C and n = eonstans
(RownsefelI and Everhart, 5983), In addition, by usage the eoefficient of eondition
K is determined by the following formula:
W
K= -...."....,,......- x 100, in Which L3
W= Weight in grams, L= total length in centimeters.
The eoefficient of condition in Silurus glanis was found as 0.58. This value
is lower than tbat of other fish species. Beeause the body shape of SHurus
glanis is very long and thin. For this reason, tne eoeffient of eondition (K)
has been found significat1y low in Silurusglanis.
The regression and eorelation eoefficients between the body weigbt-ovary
weight, body weight-egg number, and ovary weight-egg number \Vere also ealculated.
The corehtion coefficients between these criteri::ı.s, mentioned above, were
r= 0.88, r = 0.77, and r= 0.80 respectively. The ayarage diameter of eggs
(egg size) was around 2.5 mm. in the reproduction seson. Silurus glanis in our
researeh habitant produced 12340 eggs/kg. fish weight. Male and female reached
sexual ınaturity at between 2-3 of age, and 3A of age respective1y. Spawning
season of Silurus Gl.anis is between May an July İn Spring.
In this work, th.e me:rt yiled of Si/urus glanis was studied too. the rr-.tio of
some organs to the body weight were found as fol1ows; The head wcight to the
the body weight =18.65 %; gut weight to th~ body weight = 6.50 %, rins weight
to the body weight = 3.89 %; skin weight to the body weight = 4.03 %; ovary
weight to the body weight=9.00 %; ",nd liver weight to the body weight=O.85
%; the net carcas weight (without skin, but boned) to the body weight=56 %.
Primary Language | tr;en |
---|---|
Journal Section | ARAŞTIRMALAR |
Authors | |
Publication Date | January 2, 2011 |
Published in Issue | Year 1988 Volume: 19 Issue: 1-4 |
Articles published in this journal are published under the Creative Commons International License (https://creativecommons.org/licenses/by-nc/4.0/). This allows the work to be copied and distributed in any medium or format provided that the original article is appropriately cited. However, the articles work cannot be used for commercial purposes.
https://creativecommons.org/licenses/by-nc/4.0/