Reproduction areas of sea-spawning coregonids reflect the environment in shallow coastal waters

Veneranta, Lari; Hudd, Richard; Vanhatalo, Jarno

doi:10.3354/meps10169

Cited by 14 publications

(33 citation statements)

References 59 publications

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“…This is also noted in current fisheries management. However, the sea‐spawning form is endangered in the southern GoB (Urho, Pennanen, & Koljonen, ), and stocks have depleted strongly due to reproduction problems (Veneranta, Hudd, et al, ). Thus, in the southern GoB the potential overlap of both ecotypes in the whitefish catch is currently weak.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, spawning and egg development depends on low temperatures and a short ice period. High winter temperatures are observed to decrease the reproduction success of whitefish (Cingi et al, ; Veneranta, Hudd, et al, ; Veneranta, Urho, et al, ). Thus, although a higher temperature may increase the growth and potential fecundity of whitefish, the cold‐adapted reproduction cycle may be a bottleneck for the success of the species under the pressure of other environmental changes like coastal eutrophication and loss of reproduction areas due to river construction.…”

Section: Discussionmentioning

confidence: 99%

“…The sea‐spawning and slow‐growing whitefish form is more common in the northern GoB. Sea‐spawning stocks have depleted since the 1980s due to large scale environmental changes (Veneranta, Hudd, et al, ). In the northern area, the majority of the gill‐net‐caught whitefish is taken in small‐mesh gill nets (25–39 mm), but in the southern area, gill nets with a mesh size of 40–45 mm are most commonly used for whitefish (Kallio‐Nyberg et al, ) (See also Appendix : Whitefish in gill nets).…”

Section: Methodsmentioning

confidence: 99%

“…Most anadromous (70%) and sea‐spawning (82%) whitefish in the commercial catch were classified as maturing or mature. Whitefish spawn in October or early November in the GoB (Veneranta, Hudd, et al, ).…”

Section: Methodsmentioning

confidence: 99%

“…It consists of two major basins, the Bothnian Sea in the south and the Bothnian Bay in the north, separated by the Quark, a shallow sill between the basins (Figure 1). The rivers and shallow waters in the GoB are suitable reproduction areas for whitefish (Larsson et al, 2011;Veneranta, Hudd, & Vanhatalo, 2013).…”

Section: Study Area and Sampled Whitefish Catch Datamentioning

confidence: 99%

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Different growth trends of whitefish ( Coregonus lavaretus ) forms in the northern Baltic Sea

et al. 2019

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The sea growth of two whitefish forms, anadromous (Coregonus lavaretus lavaretus) and sea‐spawning (Coregonus lavaretus widegreni), was analysed using samples collected from the commercial sea catch in the Gulf of Bothnia (GoB) in the northern Baltic Sea during 1998–2014. In the GoB area, these two forms are possible to identify because the gill‐raker number and size at maturity vary between forms. The growth rate of the forms is linked to their feeding area. Sea‐spawning whitefish, which has a feeding migration near its home site, was shorter in the northern GoB (66°N–64°N) at the ages of 3–11 than those in the southern GoB (64°N–60°30′N). In the data, most whitefish were caught with gill nets in the GoB. The mesh sizes of gill nets capturing the anadromous form were mostly 35–45 mm, while those capturing the sea‐spawning form were <35 mm in the northern GoB. It is likely that the different growth trends for small and large whitefish were connected with differences in their recruitment for fishing. The length of anadromous females at the age of four sea years increased significantly, but the length of six‐year‐old anadromous female whitefish decreased over the catch years from 1998–2014. In contrast, the length of slow‐growing sea‐spawning whitefish of six years or older increased significantly in relation to the catch year in the gill‐net catch. The increase in the growth of young age groups in both forms was probably associated with the increasing temperature and the low fishing pressure on small fish. The decreasing age at capture for both forms and the depression of the mean size of old anadromous whitefish are signs of high fishing pressure with a high gill‐net effort that selectively removes the largest and oldest individuals of both forms.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Study Area and Sampled Whitefish Catch Datamentioning

confidence: 99%

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Different growth trends of whitefish ( Coregonus lavaretus ) forms in the northern Baltic Sea

et al. 2019

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Establishment of an in vitro model from the vulnerable fish species Coregonus maraena (maraena whitefish): Optimization of growth conditions and characterization of the cell line

Kaya

Tönißen

Verleih

et al. 2022

Cell Biology International

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In this study, a cell line of the fish species Coregonus maraena was produced for the first time. C. maraena is an endangered species, and studies indicate that this fish species will be affected by further population declines due to climate change. This cell line, designated CMAfin1, has been maintained in Leibovitz L‐15 supplemented with 10% fetal bovine serum over 3 years. Both subculturing and storage (short‐term storage at −80°C and long‐term storage in liquid nitrogen) was successful. Cell morphology and growth rate were consistent from passage 10 onwards. Immunocytochemical examination of cellular proteins and matrix components confirmed the mechanical stability of the cells. Actin, fibronectin, vinculin, vimentin, and tubulin are present in the cells and form a network. In addition, the transport of molecules is ensured by the necessary proteins. Gene expression analysis showed a shift in the expressions of stem cell markers between younger and higher passages. While SOX2 and IGF1 were more highly expressed in the seventh passage, SOX9 and IGF2 expressions were significantly increased in higher passages. Therefore, the stable cell culture CMAfin1 can be used for applied analysis to further understand the cell physiology of C. maranea.

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Importance of coastal primary production in the northern Baltic Sea

Ask

Rowe

Brügel

et al. 2016

Ambio

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In this study, we measured depth-dependent benthic microalgal primary production in a Bothnian Bay estuary to estimate the benthic contribution to total primary production. In addition, we compiled data on benthic microalgal primary production in the entire Baltic Sea. In the estuary, the benthic habitat contributed 17 % to the total annual primary production, and when upscaling our data to the entire Bothnian Bay, the corresponding value was 31 %. This estimated benthic share (31 %) is three times higher compared to past estimates of 10 %. The main reason for this discrepancy is the lack of data regarding benthic primary production in the northern Baltic Sea, but also that past studies overestimated the importance of pelagic primary production by not correcting for system-specific bathymetric variation. Our study thus highlights the importance of benthic communities for the northern Baltic Sea ecosystem in general and for future management strategies and ecosystem studies in particular.Electronic supplementary materialThe online version of this article (doi:10.1007/s13280-016-0778-5) contains supplementary material, which is available to authorized users.

show abstract

Reproduction areas of sea-spawning coregonids reflect the environment in shallow coastal waters

Cited by 14 publications

References 59 publications

Different growth trends of whitefish ( Coregonus lavaretus ) forms in the northern Baltic Sea

Different growth trends of whitefish ( Coregonus lavaretus ) forms in the northern Baltic Sea

Establishment of an in vitro model from the vulnerable fish species Coregonus maraena (maraena whitefish): Optimization of growth conditions and characterization of the cell line

Importance of coastal primary production in the northern Baltic Sea

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