The time of spawning and seasonal variations in the length-weight relationship and condition of chub, Leuciscus lepidus [Heckel, 1843] in Lake Beysehir [Turkey]

• Autorzy: Karabatak M
• Języki publikacji: EN

Abstrakty

EN

The chub showed a peak in spawning in June. The weight and condition (K) at the same lengths and the length-weight regression (W=ɑLᵇ) coefficients of the sexes did not differ statistically for the same season, but they were slightly higher in females (except for b). Both sexes reached the maximum weight, K, and ɑ values in spring when the gonads were ripening. Those values decreased considerably in summer owing to spawning activity. The value of regression coefficient b was lowest in spring, and highest in summer (overall b was close to 3.0, except for females in spring).

PL

Szczyt tarła przypadł w czerwcu. Ciężar i kondycja (K) przy jednakowej długości ciała oraz współczynniki regresji (W=ɑLᵇ) u obu płci nie różniły się istotnie w poszczególnych sezonach, jednak były nieco wyższe dla samic (z wyjątkiem b). Samce i samice osiągały najwyższe wartości K i ɑ na wiosnę, kiedy dojrzewały gonady. Wartości tych współczynników wyraźnie malały w lecie (efekt tarła). Współczynnik b był najmniejszy na wiosnę, a największy w lecie (ogólnie był bliski 3.0, z wyjątkiem wartości dla samic wiosną).

Słowa kluczowe

EN

spawning time; fish; length-weight relationship; Lake Beysehir; Turkey; sex; Leuciscus lepidus; seasonal variation; condition; weight; chub

• Wydawca: -
• Czasopismo: Acta Hydrobiologica
• Rocznik: 1997
• Tom: 39
• Numer: 1-2
• Opis fizyczny: p.39-46,ref.

Twórcy

autor

Karabatak M

• University of Istanbul, Ordu Cad. No: 200 [34470] Laleli-Istanbul, Turkey

Bibliografia

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