<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>The focus of the study was to analyze the effects of the artificial reproduction of whitefish, <italic>Coregonus lavaretus</italic> (L.) aged from 1+ to 4+. It was confirmed that males comprised 64.5% of the brood stock. The males were sexually mature at the age of 1+, while most females were mature at the age of 2+. The females gained weight faster in comparison to the males, and the differences were highly statistically significant (P &lt; 0.001). Survival during the period from the first spawning at age 1+ to spawning at age 4+ was 79.6% for males and 59.6% for females. The quantity of eggs obtained, the egg size, and their survival during incubation all increased as the fish aged. The weight of the eggs obtained from fish aged 3+ and 4+ was statistically significantly higher that from younger fish (1+ and 2+) (P &lt; 0.001). The results of the current study indicate that exploiting a whitefish brood stock under controlled conditions can begin as early as at age 2+. The highest relative fecundity and largest egg size were obtained in females aged 3+.</p></abstract>

The focus of the study was to analyze the effects of the artificial reproduction of whitefish, Coregonus lavaretus (L.) aged from 1+ to 4+. It was confirmed that males comprised 64.5% of the brood stock. The males were sexually mature at the age of 1+, while most females were mature at the age of 2+. The females gained weight faster in comparison to the males, and the differences were highly statistically significant (P < 0.001). Survival during the period from the first spawning at age 1+ to spawning at age 4+ was 79.6% for males and 59.6% for females. The quantity of eggs obtained, the egg size, and their survival during incubation all increased as the fish aged. The weight of the eggs obtained from fish aged 3+ and 4+ was statistically significantly higher that from younger fish (1+ and 2+) (P < 0.001). The results of the current study indicate that exploiting a whitefish brood stock under controlled conditions can begin as early as at age 2+. The highest relative fecundity and largest egg size were obtained in females aged 3+.

Growth rate and reproduction of a brood stock of European whitefish (<italic>Coregonus lavaretus</italic> L.) from Lake Gaładuś under controlled rearing conditions

Department of Sturgeon Fish Breeding, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Pieczarki 50, 11-610 Pozezdrze, Poland

Department of Lake Fisheries in Giżycko, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland

Fisheries Enterprise of the Polish Angling Association in Suwałki, Poland

Fisheries & Aquatic Life

Growth rate and reproduction of a brood stock of European whitefish ( L.) from Lake Gaładuś under controlled rearing conditions

The focus of the study was to analyze the effects of the artificial reproduction of whitefish, Coregonus lavaretus (L.) aged from 1+ to 4+. It was confirmed...

Growth rate and reproduction of a brood stock of European whitefish (Coregonus lavaretus L.) from Lake Gaładuś under controlled rearing conditions

Pubblicato online: 04 mag 2010

Pagine: 3 - 11

DOI: https://doi.org/10.2478/v10086-010-0001-4

Parole chiave
whitefish, Lake Gaładuś, growth, fecundity

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