scholarly journals Spawning, Maturity Length and Size Selectivity for Pikeperch (Sander lucioperca) in Seyhan Dam Lake

2011 ◽  
Vol 10 (4) ◽  
pp. 545-551 ◽  
Author(s):  
Caner Enver Ozyu ◽  
Volkan Baris Kiya ◽  
Sinan Mavruk ◽  
Erhan Akamca
Keyword(s):  
Size Selectivity ◽  
Sander Lucioperca ◽  
Seyhan Dam

scholarly journals Prey size selectivity of pikeperch (Sander Lucioperca L.) fed with topmouth gudgeon (Pseudorasbora Parva Temminck & Schlegel)

2017 ◽  
Vol 9 (3) ◽  
pp. 209-211
Author(s):  
M. Gevezova-Kazakova ◽  
M. Yankova ◽  
T. Hubenova ◽  
A. Zaikov ◽  
G. Rusenov
Keyword(s):  
Prey Size ◽  
Pseudorasbora Parva ◽  
Size Selectivity ◽  
Sander Lucioperca ◽  
Topmouth Gudgeon

scholarly journals Density and temperature dependent growth of pikeperch (Sander lucioperca) in the Archipelago Sea

2020 ◽  
Vol 33 ◽  
pp. 22
Author(s):  
Kari Saulamo ◽  
Outi Heikinheimo ◽  
Jyrki Lappalainen
Keyword(s):  
Fishery Management ◽  
Age Groups ◽  
Mesh Size ◽  
Effect Of Temperature ◽  
Size Selectivity ◽  
Sander Lucioperca ◽  
Important Species ◽  
Archipelago Sea ◽  
Negative Effect ◽  
Dependent Growth

In the Archipelago Sea, pikeperch (Sander lucioperca) is an important species in both commercial and recreational fisheries. Pikeperch is caught mainly with small mesh size gillnets, and annual fishing mortality is high. The possible effects of such fisheries, as well as temperature or density on pikeperch growth have not been studied earlier. The first hypothesis of this study was that the effect of temperature on growth is positive and that of density is negative. The second hypothesis was that size-selectivity of gillnets causes the fast-growing individuals to be caught at younger ages than the slow-growing ones. The results showed that temperature had a significant positive effect on growth, and this was greater than the negative effect of year-class density, which was also significant. The gillnet selectivity caused a difference of up to 60 mm in back-calculated lengths in the fully recruited age groups within the same year class, between pikeperch caught at age 6+ and age 9+. Thus, the Rosa Lee phenomenon caused by gillnet size-selectivity led to the removal of faster growing specimens from the population at younger ages. This can potentially cause underestimation of real growth, and thus, poor fishery management.

scholarly journals Pike-Perch (Sander lucioperca) and Rainbow Trout (Oncorhynchus mykiss) Fed with an Alternative Microorganism Mix for Reducing Fish Meal and Oil—Fishes’ Growth Performances and Quality Traits

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1799
Author(s):  
Michaela Schafberg ◽  
Karin Loest ◽  
Andreas Müller-Belecke ◽  
Sascha Rohn
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Fish Meal ◽  
Control Diet ◽  
Sander Lucioperca ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Growth Performances ◽  
Pike Perch ◽  
Carcass Parameters

In the last decades, several plant-based materials were used for the substitution of fish meal and oil in aquaculture. The present study evaluated the fish quality and the sensory differences of rainbow trout (Oncorhynchus mykiss) and pike-perch (Sander lucioperca) from three different feeding groups, which were fed a commercially available industrial (standard) diet, a control diet, and a special microorganism-based feed mix. This feed mainly consisted of a mix made of Rhodotorula glutinis, Crypthecodinium cohnii, and Arthrospira sp. and had 50% less fish meal and fish oil compared to typical control diets. At the beginning, the pike-perch population was six months old, and the rainbow trout population was 15 months old. The feeding study duration was 16 weeks and every four weeks the growth performance and several morphometric parameters were recorded. Afterwards, sensory evaluation took place to identify possible trends. Sensory evaluation revealed that the rainbow trout groups did not show any significant differences to the standard and control fish fillets with regard to odor, texture, and taste. The effects on rainbow trout growth performances and carcass parameters were similar to the standard group. The feed mix was not optimal for pike-perch farming, which was also reflected by significantly adversely affected growth performance and carcass parameters. The sensorial evaluation showed an opposite trend: here, only small differences in the fillets from the feed mix and standard/control diet were observed.

Ex vivo approach supports both direct and indirect actions of melatonin on immunity in pike-perch Sander lucioperca

2021 ◽  
Author(s):  
Sébastien Baekelandt ◽  
Valérie Cornet ◽  
Syaghalirwa.N.M. Mandiki ◽  
Lambert Jérôme ◽  
Dubois Mickaël ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Sander Lucioperca ◽  
Pike Perch ◽  
Ex Vivo Approach

Size selectivity of aqueous pores in stomatous cuticles of Vicia faba leaves

Planta ◽  
2005 ◽  
Vol 221 (5) ◽  
pp. 648-655 ◽  
Author(s):  
Thomas K. Schlegel ◽  
Jörg Schönherr ◽  
Lukas Schreiber
Keyword(s):  
Vicia Faba ◽  
Size Selectivity

scholarly journals Mesh size selectivity of boat seine codend for anchovy larvae and juveniles

2006 ◽  
Vol 72 (3) ◽  
pp. 414-423 ◽  
Author(s):  
KOJI SAIURA ◽  
KEISUKE MORI ◽  
TADASHI TOKAI
Keyword(s):  
Mesh Size ◽  
Size Selectivity ◽  
Larvae And Juveniles
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