Results 41 to 50 of about 9,140 (253)

Size, age and spawning frequency of landlocked Arctic charr Salvelinus alpinus (L.) in Svartvatnet, Svalbard [PDF]

open access: yesPolar Research, 1997
This contribution reports the analysis of a sample of landlocked Arctic charr collected with gillnets in Svartvatnet, Svalbard, 1964. This is the first scientific sample from a landlocked charr population from Svalbard. We found a very prominent modal group of large, old and sexually adult fish of both sexes.
NILS GULLESTAD, ANDERS KLEMETSEN
openaire   +1 more source

Rural Labor Supply and Economic Opportunities: Commuting, Migration, Tariffs, and Immigration

open access: yesApplied Economic Perspectives and Policy, EarlyView.
ABSTRACT Some rural counties remain dependent on agricultural or manufacturing jobs, but an increasing proportion have diversified economics. Rural counties also differ in their abilities to commute to an urban market characterized by higher wages and labor productivity.
Peter F. Orazem, Mary C. Ahearn
wiley   +1 more source

Characterization of Atlantic cod spawning habitat and behavior in Icelandic coastal waters. [PDF]

open access: yesPLoS ONE, 2012
The physical habitat used during spawning may potentially be an important factor affecting reproductive output of broadcast spawning marine fishes, particularly for species with complex, substrate-oriented mating systems and behaviors, such as Atlantic ...
Timothy B Grabowski   +4 more
doaj   +1 more source

Dynamics in frequency of skipped reproduction in Norwegian spring-spawning herring

open access: yes, 2004
No abstracts are to be cited without prior reference to the author.A common presumption in fisheries science is that adult iteroparous fish, once matured, typically spawn in all consecutive years. Recent evidence suggests, however, that skipping of reproduction occurs more commonly than is usually believed.
Engelhard, G.H., Heino, M.
openaire   +3 more sources

The Interoperability Challenge in DFT Workflows Across Implementations

open access: yesAdvanced Intelligent Discovery, EarlyView.
Interoperability and cross‐validation remain major challenges in the computational materials science. In this work, we introduce a common input/output standard that enables internal translation across multiple workflow managers—AiiDA, PerQueue, Pipeline Pilot, and SimStack—while producing results in a unified schema.
Simon K. Steensen   +13 more
wiley   +1 more source

The role of venture‐financed startups in innovation for US agriculture

open access: yesAmerican Journal of Agricultural Economics, EarlyView.
Abstract To evaluate the role played by startup companies in the innovation ecosystem of US agriculture, we compile a unique dataset of 6024 new entrants founded 1987–2019 that details their financing lifecycles, annual economic performance, and patenting activities.
Gregory D. Graff   +2 more
wiley   +1 more source

Contrasting reproductive strategies of two Hawaiian Montipora corals

open access: yesScientific Reports, 2022
Sessile invertebrates often engage in synchronized spawning events to increase likelihood of fertilization. Although coral reefs are well studied, the reproductive behavior of most species and the relative influence of various environmental cues that ...
E. Michael Henley   +7 more
doaj   +1 more source

Seasonal Dynamics and Environmental Drivers of Goliath Grouper (Epinephelus itajara) Sound Production

open access: yesFishes, 2023
The Goliath groupers are known to produce characteristic low frequency vocalizations (“calls”) during spawning aggregations and as part of territorial behavior.
Lauran R. Brewster   +5 more
doaj   +1 more source

Bioacoustic characterization of mating calls of a freshwater fish (Prochilodus magdalenae) for passive acoustic monitoring

open access: yesBiota Colombiana, 2021
Fish produce sounds that are usually species-specific and associated with particular behaviors and contexts. Acoustic characterization enables the use of sounds as natural acoustic labels for species identification.
Sebastián Muñoz-Duque   +3 more
doaj   +1 more source

Comparative assessment of the reproductive status of female Atlantic bluefin tuna from the Gulf of Mexico and the Mediterranean Sea.

open access: yesPLoS ONE, 2014
Despite attention focused on the population status and rebuilding trajectory of Atlantic bluefin tuna (Thunnus thynnus), the reproduction and spawning biology remains poorly understood, especially in the NW Atlantic.
Jessica M Knapp   +3 more
doaj   +1 more source

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