نتایج جستجو برای: alosa
تعداد نتایج: 268 فیلتر نتایج به سال:
In June and July 2000, Otsego Lake was stocked with 80,000 Oneida Lake strain pond fingerling walleye (Stizostidion vitreum) averaging 48mm in total length (TL) (range= 32-56mm) with the primary goal ofre-establishing walleye to the lake. The yearly stocking ofthis number of walleye will continue to at least 2003. It is expected that walleye will forage primarily upon alewives (Alosa pseudohare...
The present study was conducted on the comparison of morphometric and meristic factors among Alosa caspia (Eichwald, 1838) populations in the southern Caspian Sea basin. A total of 285 Alosa caspia specimens were caught from three localities, from west to the east of Caspian Sea including Guilan (Bandar Anzali), Mazandaran (Sari) and Golestan (Miankale) provinces. Thirty morphometric and ten me...
Introduction Many diadromous fish species are currently facing the threat of generalized population extirpations across their range, and conservation efforts implemented primarily within continental domain may not be sufficient to ensure viability. In consequence, better understanding use marine environment by these turned out critical. Material method We developed distribution models for two s...
− The application of fisheries acoustics in shallow waters opens new fields of observation and allows new methods for abundance estimates. In this paper we deal with echocounting of migrating fish crossing the Beaucaire-Vallabrègues lock, the first obstacle encountered on the Rhône, using a SIMRAD EY500 split-beam sounder, 70 kHz frequency. Two transducers sampled a section of water and evaluat...
This article documents the addition of 299 microsatellite marker loci and nine pairs of single-nucleotide polymorphism (SNP) EPIC primers to the Molecular Ecology Resources (MER) Database. Loci were developed for the following species: Alosa pseudoharengus, Alosa aestivalis, Aphis spiraecola, Argopecten purpuratus, Coreoleuciscus splendidus, Garra gotyla, Hippodamia convergens, Linnaea borealis...
هدف از این مطالعه مقایسه بعضی از ویژگیهای زیستی شامل طول کل، وزن بدن، سن و جنسیت چهار از جنس Alosa (Alosa braschnikowi، A. kessleri، A. saposchnikowii و A. caspia) در سواحل استان مازندران در دریای خزر می باشد. براساس نتایج بدست آمده بیشترین میانگین(± انحراف معیار) طول کل و وزن بدن مربوط به گونه A.braschnikowi بترتیب 32/4±65/27 سانتیمتر و 25/172±05/262 گرم بوده است. همبستگی معنی داری بین طول کل ...
Species can respond to climate change by tracking appropriate environmental conditions in space, resulting in a range shift. Species Distribution Models (SDMs) can help forecast such range shift responses. For few species, both correlative and mechanistic SDMs were built, but allis shad (Alosa alosa), an endangered anadromous fish species, is one of them. The main purpose of this study was to p...
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