scholarly journals Experimental studies on the top-down effects of silver carp and bighead carp in freshwater microcosms (Ⅰ):plankton community and primary productivity

1995 ◽  
Vol 7 (3) ◽  
pp. 226-234 ◽  
Author(s):  
Ruan Jingrong ◽  
◽  
Rong Kewen ◽  
Wang Shaomei
Keyword(s):  
Primary Productivity ◽  
Silver Carp ◽  
Experimental Studies ◽  
Plankton Community ◽  
Bighead Carp ◽  
Top Down

scholarly journals The study of the variability of morphobiological indicators of different size and weight groups of hybrid silver carp (Hypophthalmichthys spp.) as a promising direction of development of the fish processing industry

10.5219/1537 ◽  
2021 ◽  
Vol 15 ◽  
pp. 181-191
Author(s):  
Alina Makarenko ◽  
Mikhailo Mushtruk ◽  
Natalia Rudyk-Leuska ◽  
Iryna Kononenko ◽  
Petro Shevchenko ◽  
...  
Keyword(s):  
Silver Carp ◽  
Age Groups ◽  
Experimental Studies ◽  
Biological Indicators ◽  
Point Of View ◽  
Bighead Carp ◽  
Commercial Fishing ◽  
Similar Species ◽  
Fish Ponds ◽  
Weight Growth

In water reservoirs, the size and characteristics of fish, in the first place, affect – the composition and clarity of food objects, the number of food competitors and predators, their numbers, industry, and others. Besides, the rate of linear and weight growth are the arteries that determine the value of the species as an object of commercial fishing. The hybrid of silver and bighead carp easily adapts to different growing conditions (from the point of view of the formation of fish-biological indicators), protein in different years depending on feeding conditions, in one reservoir indicators of length and body weight of ribs are inadequate. Evaluating the influence of feeding conditions on the linear growth of the rib, the method of generalized evaluation was used. An indicator equal to the sum of potential fish productivity for phyto-zooplankton was used to characterize the foraging status of a particular condition in a certain period. In terms of the quality of growth indicators, the indicator of the absolute weight of nature with differentiation of farms, age groups, and years was used. The results of the research revealed significant variability in the size and weight characteristics of different groups of silver and bighead carp, which were isolated from ponds and reservoirs. According to the results of experimental studies established for the cultivation of hybrid silver and bighead carp in reservoirs, relatively high rates of linear and weight growth are expected, higher than for similar species, which is provided in the conditions of fish ponds.

scholarly journals Warming advances top-down control and reduces producer biomass in a freshwater plankton community

Ecosphere ◽  
2017 ◽  
Vol 8 (1) ◽  
pp. e01651 ◽  
Author(s):  
Mandy Velthuis ◽  
Lisette N. de Senerpont Domis ◽  
Thijs Frenken ◽  
Susanne Stephan ◽  
Garabet Kazanjian ◽  
...  
Keyword(s):  
Plankton Community ◽  
Top Down ◽  
Freshwater Plankton

scholarly journals Top-down and bottom-up influences of jellyfish on primary productivity and planktonic assemblages

2009 ◽  
Vol 54 (6) ◽  
pp. 2058-2071 ◽  
Author(s):  
Elizabeth J. West ◽  
Kylie A. Pitt ◽  
David T. Welsh ◽  
Klaus Koop ◽  
David Rissik
Keyword(s):  
Primary Productivity ◽  
Top Down ◽  
Bottom Up

scholarly journals Hydrology controls recruitment of two invasive cyprinids: bigheaded carp reproduction in a navigable large river

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3641 ◽  
Author(s):  
Daniel K. Gibson-Reinemer ◽  
Levi E. Solomon ◽  
Richard M. Pendleton ◽  
John H. Chick ◽  
Andrew F. Casper
Keyword(s):  
Mississippi River ◽  
Silver Carp ◽  
Monitoring Program ◽  
Large River ◽  
Asian Carp ◽  
Bighead Carp ◽  
Illinois River ◽  
Hypophthalmichthys Molitrix ◽  
The Past ◽  
Causative Factors

In the Mississippi River Basin of North America, invasive bigheaded carp (silver carpHypophthalmichthys molitrixand bighead carpH. nobilis, also referred to as Asian carp) have spread rapidly over the past several decades. In the Illinois River, an important tributary of the Upper Mississippi River, reproduction appears to be sporadic and frequently unsuccessful, yet bigheaded carp densities in this river are among the highest recorded on the continent. Understanding the causative factors behind erratic recruitment in this commercially-harvested invasive species is important for both limiting their spread and managing their harvest. We analyzed weekly catch records from 15 years of a standardized monitoring program to document the emergence of age-0 bigheaded carp in relation to environmental conditions. The appearance of age-0 fish was generally linked to hydrographic attributes, which probably serve as a cue for spawning. However, we found profound differences in the number of age-0 fish among years, which varied by as much as five orders of magnitude in successive years. The strong link between summer flooding and age-0 fish production we observed emphasizes the importance of understanding the hydrologic context in which sustained invasions occur. Despite evidence of sporadic recruitment, bigheaded carp populations in the Illinois River appear to be consistent or increasing because of particularly strong, episodic year classes.

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