نتایج جستجو برای: aetomylaeus nichofii
تعداد نتایج: 23 فیلتر نتایج به سال:
The lower Miocene Pirabas Formation in the North of Brazil was deposited under influence of the proto-Amazon River and is characterized by large changes in the ecological niches from the early Miocene onwards. To evaluate these ecological changes, the elasmobranch fauna of the fully marine, carbonate-rich beds was investigated. A diverse fauna with 24 taxa of sharks and rays was identified with...
Almost 25% of skates and rays’ information worldwide is insufficient to assess their extinction risk. We reported the first seven confirmed records rough eagle ray (Aetomylaeus asperrimus) along north Pacific coast Costa Rica. These findings suggest that encounters with this species are rare, possibly associated oceanographic patterns. More needed make accurate assumptions on species’ abundance...
In this study, a shoal of bull rays, Aetomylaeus bovinus (E. Geoffroy Saint-Hilaire, 1817), around sea-cage fish farm in Iskenderun Bay, Turkey is reported. Such an aggregation probably due to ontogenetic shift but may also be factor reproductive process as some pregnant females were observed. The number individuals recorded, all more than 25, shows that the species still present area needs con...
Among Accipitriformes sensu stricto, only a few species have been reported to form hybrid zones; these include the red kite Milvus milvus and black kite Milvus migrans migrans. M. milvus is endemic to the western Palearctic and has an estimated total population of 20-24,000 breeding pairs. The species was in decline until the 1970s due to persecution and has declined again since the 1990s due t...
Abstract Stingrays are a resource that is vulnerable to overfishing and habitat degradation. The research was conducted obtain data information still lacking much needed for the utilization protection of stingrays, including; life history, stomach contents, nursery ground. study in October - November 2018 by exploratory, including taking stingrays trawling measuring conditions with Conductivity...
The Oligocene (Rupelian) Byram Formation (Vicksburg Group) in Alabama, USA, is divided into three members, including (in ascending order) the Glendon Limestone, unnamed marl, and Bucatunna Clay. The marine units Alabama have been historically under-investigated, but bulk samples recently obtained from Limestone Member exposures at site AWa-9 Washington County yielded 20 unequivocal elasmobranch...
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