Ontogenetic and interpopulation differences in otolith shape of the European perch (Perca fluviatilis)
نویسندگان
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...
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Cellular and mitochondrial metabolic capacity of the heart has been suggested to limit performance of fish at warm temperatures. We investigated this hypothesis by studying the effects of acute temperature increases (16, 23, 30, 32.5 and 36°C) on the thermal sensitivity of 10 key enzymes governing cardiac oxidative and glycolytic metabolism in two populations of European perch (Perca fluviatili...
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 کاملEndoparasites of European perch Perca fluviatilis fry: role of spatial segregation.
A total of 246 perch Perca fluviatilis L. fry, 20 to 106 d old from 3 different reservoir subpopulations (epipelagic perch fry, EPF; bathypelagic perch fry, BPF; littoral perch fry, LPF), were examined for parasites. Six species of endoparasites were found: the nematode Camallanus lacustris was the most common, followed by the cestodes Proteocephalus percae, Bothriocephalus claviceps, Glanitaen...
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ژورنال
عنوان ژورنال: Fisheries Research
سال: 2020
ISSN: 0165-7836
DOI: 10.1016/j.fishres.2020.105673