Results 71 to 80 of about 5,151 (209)

Preliminary Data on the Studies of Alosa immaculate in Romanian marine waters

open access: yesScientific Annals of the Danube Delta Institute, 2017
Danube shad is a fish with high economic and socio-cultural value for the human communities established in the Danubian-Pontic space. In Romania, shad fishery has a market value of about 1.5 million euro, with average annual catches of 200-500 tonnes ...
ȚIGANOV George   +5 more
doaj  

Population genetic analysis of the endangered Mottled Duskywing butterfly (Erynnis martialis) informs species reintroduction

open access: yesInsect Conservation and Diversity, EarlyView.
Mottled Duskywing (Erynnis martialis) populations had moderate levels of genetic diversity at microsatellites with expected heterozygosity ranging from 0.43 to 0.58, and populations more than 10 km apart were differentiated from one another. Weak patterns of isolation by distance and low effective population sizes suggest that all but the largest ...
Shayla L. Kroeze   +6 more
wiley   +1 more source

Distinctive gene expression in the reduced first thoracic legs of a nymphalid butterfly

open access: yesInsect Molecular Biology, EarlyView.
Transcriptome analysis reveals that the small non‐walking front legs of a butterfly have distinct gene expression to the four walking legs. Reduced front legs express a gene with putative mechanosensory roles, a blue‐sensitive opsin and two homeobox genes.
Asia E. Hoile   +2 more
wiley   +1 more source

Northern cod (Gadus morhua) movement: insights from acoustic telemetry and genomics

open access: yesJournal of Fish Biology, EarlyView.
Abstract Knowledge of the timing and diversity of fish movements within a commercially exploited stock complex is required to ensure the sustainability of fisheries. Although migration can be driven by environmental factors, genomic mechanisms also play an important role in this complex life‐history trait. The northern cod (Gadus morhua) stock complex,
M. Lisette Delgado   +10 more
wiley   +1 more source

Use of historical sources in a study of the 1895 floods on the Danube River and its tributaries [PDF]

open access: yesGeographica Pannonica, 2014
Hydrological data series that are measured on the Danube River are temporally limited. Instrumental flow data can be prolonged by documentary data from historical sources in archives.
Melo Marián   +4 more
doaj  

Relationship between the environment and the occurrence of invasive pumpkinseed Lepomis gibbosus in lotic and lentic habitats

open access: yesJournal of Fish Biology, EarlyView.
Abstract The pumpkinseed Lepomis gibbosus is a freshwater fish species native to North America. It has been introduced to Europe, where it is recognized as one of the worst aquatic invaders due to its high adaptability and invasive potential. This study aimed to determine the presence of L. gibbosus in small to medium‐sized water bodies, both lotic and
Ivan Špelić   +2 more
wiley   +1 more source

Temperature effects from hydropeaking impair egg and larval development in Danube salmon Hucho hucho and brown trout Salmo trutta

open access: yesJournal of Fish Biology, EarlyView.
Abstract Hydropeaking is considered an important stressor for salmonids and other species in rivers affected by hydropower. In this study, we investigated the in situ effects of hydropeaking on the survival of eggs and larvae of fall spawning brown trout as well as spring spawning Danube salmon.
Julius Gorenz   +3 more
wiley   +1 more source

Governing Transnational Commons: How International Treaties and Multi‐Stakeholder Organizations Shape Cooperation and Conflict

open access: yesJournal of Management Studies, EarlyView.
Abstract When common‐pool resources such as freshwater, clean air, and fisheries span national borders, the collective action problems encountered are particularly severe. This study explores the role of polycentric governance systems in overcoming these pressing problems, which frequently underlie global grand challenges. Integrating political economy
Amol M. Joshi   +4 more
wiley   +1 more source

Judaism, Philo, and Hegel's Theology

open access: yesModern Theology, EarlyView.
Abstract Hegel displays consistent interest in Judaism, but his presentation seems to differ widely between his earlier and later writings. Contemporary scholarly interpretations of this apparent change also differ widely. In this article, I present the interpretive problem as one of continuity‐discontinuity, and place the major scholarly treatments ...
Reed Frey, C.O.
wiley   +1 more source

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