Influence of temperature during four following spawning seasons on the spawning effectiveness of common bream, Abramis brama (L.) under natural and controlled conditions
| Autor: | Katarzyna Palinska-Zarska, Andrzej Skrzypczak, Dariusz Kucharczyk, Anna Hakuć-Błażowska, Krzysztof Kupren, Grażyna Furgała-Selezniow, Daniel Zarski, Andrzej Mamcarz, Roman Kujawa, Tomasz Czarkowski, Katarzyna Targońska |
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| Rok vydání: | 2014 |
| Předmět: |
education.field_of_study
biology urogenital system Physiology Common bream fungi Population biology.organism_classification Biochemistry Spawn (biology) Fishery Mortality level Water temperature Ecosystem General Agricultural and Biological Sciences education reproductive and urinary physiology Developmental Biology |
| Zdroj: | Journal of Thermal Biology. 39:17-23 |
| ISSN: | 0306-4565 |
| DOI: | 10.1016/j.jtherbio.2013.11.005 |
| Popis: | The common bream, Abramis brama (L.) in Kortowskie Lake (north-eastern Poland) usually spawn when the water temperature during the late spring rises to 20 °C. The optimal water temperature for embryonic development of this population is 21 °C. However, in some cases, the temperatures of the spawning grounds during bream spawning are much higher, becoming semi-lethal or even lethal for bream embryos. The aim of the study was to investigate the natural and artificial spawning effectiveness of bream during a 4-year study regarding the reproductive effectiveness of the wild bream population in relation to thermal fluctuation (optimal and semi-lethal) of their ecosystem during the natural spawning season. During four following seasons, the bream spawners, as well as the eggs, were collected from the spawning grounds and incubated at optimal (21 °C) and semi-lethal (23 °C) temperatures. The spawning of mature bream was artificially induced and the obtained eggs were also incubated at the same temperatures. The period of observed spawners on the spawning grounds was different in different years: the longest time of bream spawning was in the second year of the study and the shortest was during the third year of the study. In the last year, a decrease in water temperature caused a break in the spawning. Thermal changes in water temperature during the spawning season may have caused a high mortality level of bream embryos and decreased the recruitment of the next species generation. |
| Databáze: | OpenAIRE |
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