Oxygen requirements of whitefish and vendace (Coregoninae) embryos at final stages of their development

Czerkies, Piotr; Kordalski, Krzysztof; Golas, T.M.; Krysinski, Daniel; Luczynski, M.

doi:10.1016/s0044-8486(02)00049-2

Cited by 21 publications

(17 citation statements)

References 15 publications

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“…At 3–14° C, the concentration of dissolved oxygen in the water can be at most 10–13 mg l −1 decreasing within that temperature range (Montgomery et al , 1964). The dissolved oxygen concentration of 10–12 mg l −1 in the present study was sufficient, however, since the embryos of coregonids require an oxygen concentration of > 3·2 mg l −1 (Czerkies et al , 2002). Furthermore, the incubation water was aerated to provide oxygen to the boundary layer next to the chorion of eggs.…”

Section: Discussionmentioning

confidence: 64%

“…On the basis of day‐degrees, the embryonic development of C. lavaretus was retarded at incubation temperatures of 7·0 and 9·2° C. Retardation of embryonic development has previously been observed under hypoxic conditions and in exposure to various pollutants (Rombough, 1988; Kamler, 1992; Shang & Wu, 2004). Hypoxia caused a lowering of the heart rate of C. lavaretus and C. albula embryos, and the reduction in the heart rate was more pronounced at 8 than at 4° C (Czerkies et al , 2002). A reduced heart rate is an indication of retarded development in yolk‐sac fry following exposure to various pollutants (Vuorinen & Vuorinen, 1987; Keinänen et al , 2000).…”

Section: Discussionmentioning

confidence: 99%

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Elevated water temperature impairs fertilization and embryonic development of whitefish Coregonus lavaretus

Cingi¹,

Keinänen²,

Vuorinen³

2010

Journal of Fish Biology

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The adverse effects of high temperatures on the early life stages of anadromous whitefish Coregonus lavaretus were experimentally examined by assessing fertilization success, the percentage of developmental abnormalities, cumulative mortality and the rate of embryogenesis across a range of temperatures. Temperatures >or= 7 degrees C increased the proportion of unfertilized and abnormally dividing eggs, deformed embryos and consequent mortality. The higher the temperature, the more severe were the effects. When eggs were fertilized and constantly incubated at various temperatures, the effective level for 50% of the eggs and embryos (EL50) of temperature was 7.6 degrees C at the developmental stage when eye pigmentation was visible. Fewer developmental abnormalities and a lower cumulative mortality rate were observed when embryos were exposed to high temperatures from the later, gastrula stage, than from fertilization or the four-cell stage. Irrespective of retarded development in terms of day-degrees (i.e. the sum of daily mean temperatures), a high incubation temperature reduced the development time of C. lavaretus, leading to earlier hatching, and hatched fry were shorter than at the reference temperature of 4-5 degrees C. Global warming will particularly pose risks for stenothermic species such as C. lavaretus, with early life stages being especially susceptible. Thus, relatively small increases and fluctuations in river water temperatures during the spawning season of this anadromous species may have substantial negative impacts on its recruitment and population persistence.

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Section: Discussionmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Elevated water temperature impairs fertilization and embryonic development of whitefish Coregonus lavaretus

Cingi¹,

Keinänen²,

Vuorinen³

2010

Journal of Fish Biology

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“…Oxygenated depth was calculated as the minimum water depth range observed during the eutrophic phase with the water containing at least 2.5 mg l 21 dissolved oxygen. The limit of 2.5 mg l 21 was chosen to correspond to the critical oxygen level at which embryo development is negatively affected 47 . Egg survival data.…”

Section: Methodsmentioning

confidence: 99%

Eutrophication causes speciation reversal in whitefish adaptive radiations

Vonlanthen

Bittner

Hudson

et al. 2012

Nature

407

565

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Species diversity can be lost through two different but potentially interacting extinction processes: demographic decline and speciation reversal through introgressive hybridization. To investigate the relative contribution of these processes, we analysed historical and contemporary data of replicate whitefish radiations from 17 pre-alpine European lakes and reconstructed changes in genetic species differentiation through time using historical samples. Here we provide evidence that species diversity evolved in response to ecological opportunity, and that eutrophication, by diminishing this opportunity, has driven extinctions through speciation reversal and demographic decline. Across the radiations, the magnitude of eutrophication explains the pattern of species loss and levels of genetic and functional distinctiveness among remaining species. We argue that extinction by speciation reversal may be more widespread than currently appreciated. Preventing such extinctions will require that conservation efforts not only target existing species but identify and protect the ecological and evolutionary processes that generate and maintain species.

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“…It is known that oxygen diffusion into the perivitelline space depends on egg envelopes thickness (Fuiman 2002). Comparing oxygen consumption between intact eggs and dechorionated embryos, Buznikov (1961) showed that envelopes reduce oxygen consumption, what happens especially before hatching (Czerkies et al 2002). Ciuhandu et al (2005) concluded that O. mykiss embryos without egg envelopes moved more frequently and grew faster than those developing inside egg envelopes.…”

Section: Hatching Enzyme and Embryo Hatching Movementsmentioning

confidence: 99%

Fish hatching strategies: a review

Korwin-Kossakowski

2011

Rev Fish Biol Fisheries

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The paper presents differences in the distribution of hatching gland cells, and the location of egg envelope digestion, the significance of hatching movements, and the ways larvae escape from egg envelopes. A review of the literature on the hatching orientation of 34 fish species is compared. No correlation was seen between hatching orientation and egg diameter or newly hatched larva length, nor newly hatched larvae length ratio to egg diameter. Photographs of twelve freshwater species present the moment of hatching either head first or tail first. Some differences were shown in swelling between eggs incubated in commercial hatchery and developed in natural conditions, as well as possible effect of these differences on hatching.

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Oxygen requirements of whitefish and vendace (Coregoninae) embryos at final stages of their development

Cited by 21 publications

References 15 publications

Elevated water temperature impairs fertilization and embryonic development of whitefish Coregonus lavaretus

Elevated water temperature impairs fertilization and embryonic development of whitefish Coregonus lavaretus

Eutrophication causes speciation reversal in whitefish adaptive radiations

Fish hatching strategies: a review

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