scholarly journals Predation by the mysid shrimps Mysis mixta and M. relicta on benthic eggs of Bosmina longispina maritima (Cladocera) in the northern Baltic Sea

2004 ◽  
Vol 281 ◽  
pp. 155-163 ◽  
Author(s):  
S Viitasalo ◽  
M Viitasalo
Keyword(s):  
Oecologia ◽  
1990 ◽  
Vol 84 (3) ◽  
pp. 430-432 ◽  
Author(s):  
Sture Hansson ◽  
Lars G. Rudstam ◽  
Sif Johansson

1989 ◽  
Vol 101 (1) ◽  
pp. 43-52 ◽  
Author(s):  
L. G. Rudstam ◽  
K. Danielsson ◽  
S. Hansson ◽  
S. Johansson

2004 ◽  
Vol 61 (8) ◽  
pp. 1267-1277 ◽  
Author(s):  
Michele Casini ◽  
Massimiliano Cardinale ◽  
Fredrik Arrhenius

Abstract No field studies have been performed on the selectivity of herring and sprat in the southern Baltic Sea in relation to their entire range of prey. Accordingly, we tested in the field the following hypotheses: (i) sprat and herring are selective feeders and (ii) sprat and herring selectivity is size- and season-dependent. The results show that (i) smaller herring and all size classes of sprat are strictly zooplanktivorous, selecting principally Temora longicornis and Bosmina maritima during the autumn and Pseudocalanus elongatus in winter; (ii) larger herring are essentially nektobenthos feeders, predating on Mysis mixta during the autumn and amphipods and polychaetes during the winter; and (iii) herring and sprat seem to avoid Acartia spp. in both autumn and winter. During the autumn, herring are zooplanktivorous up to 18–20 cm, whereas in winter herring feed on nektobenthos starting from 14–15 cm. Selectivity was not an absolute process but it was related to prey relative abundance in the sea and, possibly, to prey profitability (e.g. size, conspicuousness, and reaction time).


2000 ◽  
Vol 136 (3) ◽  
pp. 553-559 ◽  
Author(s):  
M. Viherluoto ◽  
H. Kuosa ◽  
J. Flinkman ◽  
M. Viitasalo

Boreas ◽  
2002 ◽  
Vol 31 (1) ◽  
pp. 65-74 ◽  
Author(s):  
Christian Christiansen ◽  
Helmar Kunzendorf ◽  
Kay-Christian Emeis ◽  
Rudolf Endler ◽  
Ulrich Struck ◽  
...  

2003 ◽  
pp. 136-146
Author(s):  
K. Liuhto

Statistical data on reserves, production and exports of Russian oil are provided in the article. The author pays special attention to the expansion of opportunities of sea oil transportation by construction of new oil terminals in the North-West of the country and first of all the largest terminal in Murmansk. In his opinion, one of the main problems in this sphere is prevention of ecological accidents in the process of oil transportation through the Baltic sea ports.


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