Marine spawning sites of perch Perca fluviatilis revealed by oviduct-inserted acoustic transmitters
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چکیده
منابع مشابه
Sperm characteristics in perch Perca fluviatilis L
Sperm production is a crucial factor for the potential reproductive success of males in many species (Nakatsuru & Kramer, 1982). Especially under strong sperm competition, higher sperm numbers in the ejaculates are likely to increase a male’s chance of fertilization (Parker et al., 1996). But sperm production is limited by physiological constraints, e.g. by testis size, which often depends on t...
متن کاملFirst-year overwinter mortality in Eurasian perch (Perca fluviatilis L.)
The importance of overwinter mortality of 0+ perch (Perm fluviatilis L.) in central European lakes was estimated using a stochastic simulation model. The probability of overwinter mortality of a perch co hort was calculated by using a model developed for yellow perch (P. flavescens Mitchill). Winter duration from a long-term data set and the length of perch at the end of the first year from fi...
متن کاملSelective predation by perch (Perca fluviatilis) on a freshwater isopod, in two macrophyte substrates
Rapporttyp Report category Licentiatavhandling x Examensarbete C-uppsats D-uppsats Övrig rapport _______________ Språk Language Svenska/Swedish x Engelska/English ________________ Titel Title Selective predation by perch (Perca fluviatilis) on a freshwater isopod, in two macrophyte substrates Författare Author Magnus Andersson Sammanfattning Abstract Recent studies show that populations of the ...
متن کاملYellow Perch, Perca flavescens
range, yellow perch, Perca flavescens, are viewed variously as a sport fish, a valuable food fish, an important forage species, or a nuisance trash fish with little commercial or sport value. Attitudes toward yellow perch vary with its relative availability and with historical regional preferences. In much of the midwestern and central Atlantic areas of the United States and in central Canada, ...
متن کاملOccurrence of parasitic ciliates (Protozoa) on perch (Perca fluviatilis) in Lake Vlasinsko
In the sample of 83 specimens of the perch (Perca fluviatilis L., 1758), caught on eight different sampling sites at the Vlasinsko Lake reservoir, in April–October 1993, 25 infested specimens were found. They were infested with the following species of parasitic ciliates: Trichodinella epizootica, Apiosoma robustum, Apiosoma piscicolum ssp. perci, Ichthyophthirius multifiliis, Chilodonella cypr...
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ژورنال
عنوان ژورنال: Aquatic Biology
سال: 2013
ISSN: 1864-7782,1864-7790
DOI: 10.3354/ab00529