Eggs and larvae of Nototheniops larseni from the Spongocoel of a Hexactinellid sponge near Hugo island, Antarctic Peninsula

Polar Biology ◽  
1989 ◽  
Vol 10 (3) ◽  
Author(s):  
JohnT. Konecki ◽  
TimothyE. Targett
Keyword(s):  
Antarctic Peninsula ◽  
Hexactinellid Sponge ◽  
Eggs And Larvae

CURRENT STATE AND DEVELOPMENT PERSPECTIVES OF THE CASPIAN SPRAT FISHERIES

2018 ◽  
pp. 69-75
Author(s):  
Tatiana Vasilievna Pomogaeva ◽  
Aliya Ahmetovna Aseinova ◽  
Yuriy Aleksandrovich Paritskiy ◽  
Vjacheslav Petrovich Razinkov
Keyword(s):  
Food Item ◽  
Growth Potential ◽  
North West ◽  
Marine Fishery ◽  
The North ◽  
Current State ◽  
West Part ◽  
Eggs And Larvae ◽  
Intensive Growth

The article presents annual statistical data of the Caspian Research Institute of Fishery. There has been kept track of the long term dynamics of the stocks of three species of Caspian sprat (anchovy, big-eyed kilka, sprat) and investigated a process of substituting a food item of sprats Eurytemora grimmi to a small-celled copepod species Acartia tonsa Dana. According to the research results, there has been determined growth potential of stocks of each species. Ctenophoran-Mnemiopsis has an adverse effect on sprat population by eating fish eggs and larvae. Ctenophoram - Mnemiopsis is a nutritional competitor to the full-grown fishes. The article gives recommendations on reclamation of stocks of the most perspective species - common sprat, whose biological characteristics helped not to suffer during Ctenophoram outburst and to increase its population during change of the main food item. Hydroacoustic survey data prove the intensive growth of common sprat biomass in the north-west part of the Middle Caspian. According to the results of the research it may be concluded that to realize the volumes of recommended sprat catch it is necessary to organize the marine fishery of common sprat at the Russian Middle Caspian shelf.

CHANGES IN BEACH DEPOSIT CHARACTERISTICS ON JOINVILLE AND LIVINGSTON ISLANDS, ANTARCTIC PENINSULA

2020 ◽  
Author(s):  
Brittany M. Theilen ◽  
◽  
Alexander R. Simms ◽  
Cameron Gernant ◽  
Julie Zurbuchen ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Deposit Characteristics
Sign in / Sign up

Export Citation Format

Share Document