Two of the main drivers speciation among aquatic vertebrates are physical isolation (e.g., lakes and streams) micro-niche availability tropical reefs). In both regards, mesopelagic domain open ocean, Earth’s second largest cumulative ecosystem (behind only bathypelagic domain), would seem retardant. Ocean circulation makes rare on contemporary geological time/space scales, lack substrate preclu...

Aras ve Kura nehirleri kaynağını Türkiye sınırları içerisinden alıp Azerbaycan’ın Sabirabad şehri yakınlarında birleşmekte buradan sonra ise Neftçala şehrinde Hazar denizine dökülmektedir. nehirlerinin varlığı, oluşturulmasında önemli bir etken olan Aran (Kür-Araz) Ekonomik Bölgesi, tarım, hayvancılık, sanayi, enerji, ulaşım gibi ekonomik faaliyetlerinin yoğunlaştığı saha olarak önem taşımaktad...

Yearling common barbel (Barbus barbus L.) were fed four purified casein-based diets for 6 weeks in outdoor cages. Besides control diet, these were supplemented with 0.3 mg kg(-1) dw selenium (Se) from sodium selenite, or 0.3 and 1.0 mg kg(-1) from Se-enriched microalgae biomass (Chlorella), a previously untested Se source for fish. Fish mortality, growth, Se accumulation in muscle and liver, an...

Одним из важнейших событий в Армянском нагорье рубежа IV–III тысячелетий до н. э. является распространение куро-аракской культуры эпохи ранней бронзы на другие части и за пределы нагорья. Это явление известно под названием «куро-аракская экспансия». Датировка «экспансии» около 3000–2900 гг. показывает, что это произошло период резкого изменения климата, известного как «климатическое событие 5.2...

this research covered three villages in kura local government area of kano state. the study described the socio-economic characteristics of maize producers and their production techniques and also determined the profitability and resource use efficiency in the maize production. structured questionnaires were used for primary data collection and 40 small scale producers were purposively selected...