Long-term fluctuations in population of Semibalanus balanoides (L.) (Crustacea) in the estuarine zone of the Kola Bay
Journal Title: Вестник МГТУ - Year 2017, Vol 20, Issue 2
Abstract
The intertidal population of the barnacles Semibalanus balanoides has been explored in the estuarine zone of the Tuloma River at the end of the Kola Bay for the first time. Barnacles S. balanoides are typical species for the littoral zone of the northern seas, they populate both the high and low salinity areas along the coast of the Barents Sea. The ecology and distribution of barnacle population in estuarine intertidal zones of the Barents Sea are not studied previously, and under the critical salinity conditions of any estuary, in particular. The investigation have been carried out on the littoral of the western (left) shore of the southern tribe of the Kola Bay – the estuary section from the Tuloma bridge to the Cape Elovy. The studied site is a sandy-boulder beach with stony bars, its length is about 1 150 m, the area is about 126 500 m2. Counting the number of S. balanoides in clusters has been performed on site (without removal of the copepods from the population) by the standard method for intertidal sampling. Simultaneously with the defining the number of barnacles for the period 2003–2014, the measurements of salinity and temperature of water and air have been made. The peculiarity of the estuarine barnacle population is their complete absence in the upper horizon of the littoral, and in the middle and the lower horizons they are found only within the channels of the littoral streams (3–20 specimens in the sample). For the first time the abundance and biomass of barnacles S. balanoides in this estuarine population has been determined, and the causes of their narrow-local distribution on the estuary littoral of the Tuloma River have been revealed. The main ecological factors determining the abundance and specific distribution of barnacles under the conditions of estuarine littoral have been established. The regular increase in the density of adult S. balanoides settlements along the gradient of water salinity from the Tuloma River to the sea has been shown. The long-term fluctuations in the abundance of barnacle S. balanoides have been found, associated, obviously, with climate changes.
Authors and Affiliations
V. S. Svitina, A. V. Gudimov
Keywords
Related Articles
- EP ID EP225415
- DOI 10.21443/1560-9278-2017-20-2-352-362
- Views 82
- Downloads 0
Migrations and movements of fish in the system "riverbed depression – river"
The researchers have been carried out in the basin of the Lower Irtysh at the mouth of the River Konda, where there is one of the large wintering riverbed depression; the patterns of distribution of fish in different par...
Development of technology of sauce from regional raw materials with the addition of pectin
The production technology of sauce from cranberries and apple pectin has been described. The characteristics of the main raw material have been considered. The results of marketing researches of assortment of sauces, rea...
Technology of flour confectionery products using emulsion obtained in conditions of cavitation processing
The idea of using the cavitation energy in food industry appeared in the middle of the last century, but due to absence of efficient machineries and developed process theory this method was not used. The attractiveness o...
Managing the process of tanker towing by regulating the cable tension
Automatic control of the towing process is carried out through the impact of a controlled parameter on it – the cable tension which varies depending on the kinematic parameters of the vessel's motion. As a source of form...
A pulse generator with inductive energy storage for measuring the grounding resistance of transmission line towers
The pulse method may be used to measure the footing resistance of transmission towers with overhead grounding wires. Measuring systems that obtain the time dependent transient impedance may be used to measure the low-fre...