Before 1982, Daphnia retrocurva and Daphnia galeata mendotae were the dominant species of Daphnia in Lake Michigan. Between 1972 and 198 1, Daphnia community structure in the offshore region shifted toward greater dominance of the larger D. galeata mendotae, with Daphniapulicaria, another large species, dominating by 1982. This continued through summer 1984. Shifts in offshore Daphnia community...

Most evidence for hybrid swarm formation stemming from anthropogenic habitat disturbance comes from the breakdown of reproductive isolation between incipient species, or introgression between allopatric species following secondary contact. Human impacts on hybridization between divergent species that naturally occur in sympatry have received considerably less attention. Theory predicts that rei...

Predicting and mitigating the impact of anthropogenic barriers on migratory fish requires an understanding individual environmental factors that influence barrier passage. Here, upstream spawning migrations iteroparous twaite shad Alosa fallax were investigated over three successive in a highly fragmented river basin using passive acoustic telemetry ( n = 184). More approached passed lower reac...

Araştırma, 2020 yılı Haziran-Temmuz aylarında Düzce ili Akçakoca ilçesinde balıkçı barınağı ve Su Ürünleri Kooperatifinde gerçekleştirilmiş olup, deniz balıklarının aylık fiyat değişimleri tespit edilerek, türler yıllar arasındaki ilişkilerinin belirlenmesi amaçlanmıştır. Akçakoca’da en çok satışı yapılan hamsi (Engraulis encrasicolus ponticus), istavrit (Trachurus trachurus), mezgit (Merlangus...

In this study 288 length-weight relationships of some fish species from the Turkish coasts Black Sea were gathered 138 studies, which conducted by several researchers between 1989 and 2021. For all species, “b” values ranged 2.49 for Trachurus trachurus to 3.75 Alosa caspia. The expected range 2.5<b<3.5 is confirmed fish. It thought that high b value (3.75) given A. caspia may be ...