scholarly journals The use of artificial spawning substrates in order to understand the factors influencing the spawning site selection, depth of egg strands deposition and hatching time of perch (Perca fluviatilis L.)

2012 ◽  
Vol 71 (1) ◽  
pp. 18 ◽  
Author(s):  
Martin Čech ◽  
Lukáš Vejřík ◽  
Jiří Peterka ◽  
Milan Říha ◽  
Milan Muška ◽  
...  
Keyword(s):  
Site Selection ◽  
Perca Fluviatilis ◽  
Hatching Time ◽  
Spawning Site ◽  
Factors Influencing ◽  
Perch Perca Fluviatilis

Homing and spawning site selection by sockeye salmon (Oncorhynchus nerka) in Iliamna Lake, Alaska

1991 ◽  
Vol 69 (1) ◽  
pp. 176-181 ◽  
Author(s):  
Gregory R. Blair ◽  
Thomas P. Quinn
Keyword(s):  
Site Selection ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Release Site ◽  
Reproductive Condition ◽  
Spawning Site ◽  
Factors Influencing ◽  
Capture Site ◽  
Site Characteristics ◽  
Ultrasonic Transmitters

Sockeye salmon (Oncorhynchus nerka) spawn along several island beaches and nearby streams in the eastern portion of Iliamna Lake, Alaska. We investigated the importance of homing, attraction to spawning site characteristics, and attraction to conspecifics in similar reproductive condition as factors influencing spawning site selection. Sockeye were displaced reciprocally between two similar island beaches and a dissimilar nearby stream. Few sockeye successfully homed from one beach to another (11%); those displaced to the stream from a beach displayed intermediate homing (24%) and the best homing was back to the stream (65%). More fish remained at the release site when it was similar to the capture site (25%) than when it was dissimilar (4%). Sockeye that left the release site for a beach were more often missing (68%) than those departing for the creek (30%). The use of ultrasonic transmitters revealed that four of six sockeye that departed for a beach were relocated at a spawning beach other than the capture site. Spawning site characteristics apparently play a role in spawning site selection, but the need to spawn at the capture site was more important. Homing was better to the creek, presumably because it had a unique odor and its flow made it easier to locate than the beaches.

scholarly journals Restoration of a river backwater and its influence on fish assemblage

2011 ◽  
Vol 50 (No. 10) ◽  
pp. 473-482 ◽  
Author(s):  
E. Hohausová ◽  
P. Jurajda
Keyword(s):  
Fish Assemblage ◽  
Perca Fluviatilis ◽  
Rutilus Rutilus ◽  
Roach Rutilus Rutilus ◽  
Spawning Period ◽  
Spawning Site ◽  
Perch Perca Fluviatilis ◽  
Current Value ◽  
Morava River ◽  
Habitat Development

The development of fish assemblage in a restored river backwater (Kurfürst backwater, Morava River, Czech   Republic) was monitored over a six-year period from its restoration. The structure of fish assemblage remained similar throughout the years. Species richness of adult fish increased from twelve species during the restoration to 20 after it. Initially steady fish abundance (mean 52.3–98.1 inds/ha) and biomass (mean 5.8–7.6 kg/ha) increased significantly in 1999 five years after restoration (576.9 inds/ha and 23.3 kg/ha, respectively). The main resident species were pike Esox lucius, roach Rutilus rutilus, rudd Scardinius erythrophthalmus and perch Perca fluviatilis. High abundance of bleak Alburnus alburnus and chub Leuciscus cephalus was related to their spring spawning period. The structure of the 0+ fish assemblage was similar throughout the years, with chub and bleak prevailing during the restoration, and roach, chub and rudd after it. The number of 0+ species increased from seven to 17. The monitoring documented that the restoration could be considered as beneficial for the fish assemblage. Habitat development of the backwater is likely to influence its current value as a refuge, spawning site and nursery for local fish populations.  

Consumption of plant material by perch (Perca fluviatilis)

2016 ◽  
Vol 65 (2) ◽  
pp. 95-97 ◽  
Author(s):  
Tomáš Zapletal ◽  
Zdeněk Adámek ◽  
Pavel Jurajda ◽  
Kevin Roche ◽  
Lucie Všetičková ◽  
...  
Keyword(s):  
Plant Material ◽  
Perca Fluviatilis ◽  
Perch Perca Fluviatilis

Short-term storage of perch (Perca fluviatilis L.) milt under cooling conditions

2013 ◽  
Vol 13 ◽  
pp. 39 ◽  
Author(s):  
Beata Sarosiek ◽  
Beata I. Cejko ◽  
Dariusz Kucharczyk ◽  
Daniel Żarski ◽  
Sylwia Judycka ◽  
...  
Keyword(s):  
Perca Fluviatilis ◽  
Short Term ◽  
Cooling Conditions ◽  
Perch Perca Fluviatilis ◽  
Short Term Storage ◽  
Term Storage
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