Seasonal and long-term changes in fishing depth of Lake Constance whitefish

Reproduction vs. growth: indications for altered energy fluxes in Lake Constance whitefish through size-selective fishery

Fisheries-induced evolution (FIE) has been reported for several intensively exploited fish stocks worldwide. Most studies focused on marine populations of high commercial interest , but FlE may also occur in intensively harvested fTesh water fish stocks. An example is the whitefish (Coregonus lavaretus) stock of Lake Constance. Previous evidence for FlE in this stock, tllrough tile analysis of ...

Long term anthropogenic impacts on the whitefish (Coregous lavaretus L.) stock of Lake Constance

Seasonal variation of solitary wave properties in Lake Constance

[1] The properties of internal solitary waves (ISWs) depend on the stratification of the water body. In most climatic regions the stratification in lakes and oceans varies during the year, and hence the properties of the ISWs can also be expected to change over the seasons. On the basis of a long-term temperature time series recorded over 6 years, this paper investigates seasonal changes in the...

Changes in whitefish scales d13C during eutrophication and reoligotrophication of subalpine lakes

We measured the isotope composition of whitefish (Coregonus lavaretus) scales from 50-yr collections to determine the pattern of change of d13C during the eutrophication and reoligotrophication of two subalpine lakes: Lakes Constance and Geneva. The isotope composition of scales from Lake Annecy, a subalpine lake that has been protected from eutrophication, was also determined, to provide a con...

Does water calcium content influence the distinctness of daily growth increments in the otoliths of larval whitefish (Coregonus lavaretus L.)?

In larval and juvenile whitefish (Coregonus /avaretlls L.) from Lake Constance, Germany, the otolith increments are deposited daily, whereas daily deposition could not be confirmed in larval whitefish from Lake Pyhaselka, Finland. The calcium concentration in Lake Constance is high (around 1.3 mM), while calcium deficiency is typical for Finnish lakes (around 0.15 mM). Therefore, the hypothesis...