کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8849388 | 1618553 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microhabitat preferences of triploid Cobitis fish and diploid progenitors in two streams in Slovakia (Danube River Basin)
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Loaches (genus Cobitis) in Slovakian tributaries (Danube River Basin) are represented by diploid-polyploid hybrid complexes of C. elongatoides and C. tanaitica. Uniquely, their coexistence is made possible by the presence of polyploid (mainly triploid) females that are sexually dependant on diploid male sperm (donors) for gynogenesis. Information on the spatial distribution of Cobitis with of differing ploidy remains relatively scarce. The main aim of this study, therefore, was to identify in ploidy in the species preferred microhabitat. Overall, 345 Cobitis were recorded in Rivers Okna and Ondava (Danube Basin) between 2011 and 2015, with 316 diploid and triploid individuals detected by flow cytometry examined were studied for the microhabitat preferences with the using the point sample method. The sex ratio differed significantly between localities, while diploid-polyploid ratio not. Moreover, each of ploidy-sex forms (i.e. diploid male, diploid female, triploid female) showed a preference for a specific substrate composition, velocity, depth and distance from the bank at both localities. Mixed effect linear models identified clear differences in fine substrate between seasons for individuals from the River Okna. Similarly, non-metric multidimensional scaling detected differences in environmental variables preference for both diploid and triploid forms. These finding indicate specific spatial and temporal microhabitat preference for diploid (sexual donors) and triploid (asexuals) C. elongatoides Ã C. tanaitica when coexisting as mixed a population.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Limnologica - Volume 69, March 2018, Pages 59-66
Journal: Limnologica - Volume 69, March 2018, Pages 59-66
نویسندگان
Jakub FedorÄák, Ladislav Pekárik, Karel HalaÄka, ĽubomÃr Å miga, Peter Manko, Juraj Hajdú, LukáÅ¡ VeteÅ¡nÃk, Ján KoÅ¡Äo,