Results 151 to 160 of about 15,104 (308)

Causal analysis of trade loss from pathogens: A global study of foot and mouth disease impacts on meat exports

American Journal of Agricultural Economics, EarlyView.
Abstract Our general interest is in global trade loss from livestock pathogens, specifically exports. We adopt a causal inference approach that considers animal disease outbreaks over time as non‐staggered binary treatments with the potential for switching in (infection) and out of treatment (recovery) within the sample period. The outcome evolution of
Mohammad Maksudur Rahman, Thomas L. Marsh   +1 more
wiley   +1 more source

Seeds of change: The impact of Ethiopia's direct seed marketing approach on smallholders' seed purchases and productivity

American Journal of Agricultural Economics, EarlyView.
Abstract While multiple factors explain low adoption rates of improved varieties by small‐scale farmers in sub‐Saharan Africa, a key supply‐side constraint is the limited availability of seed embodying new traits in the volume, quality, price, and timeliness required by farmers. This constraint is partly attributable to classical failures in the market
Dawit Mekonnen, Gashaw T. Abate, Seid Yimam, Rui Benfica, David J. Spielman, Frank Place   +5 more
wiley   +1 more source

Redistributive land reforms, agricultural productivity, and structural change: New cross‐national evidence

American Journal of Agricultural Economics, EarlyView.
Abstract Large‐scale land reforms constitute a substantial redistribution of wealth and reallocation of agricultural land, which is a major form of asset and production input in developing countries. While land redistribution (from the rich to the poor) remains a highly controversial issue, extensive evidence on its effect is limited.
Devashish Mitra, Abdulaziz B. Shifa, Lan Anh Tong, Mehmet A. Ulubasoglu   +3 more
wiley   +1 more source

A comparative study of the ecology of smooth flounder, Pleuronectes putnami, and winter flounder, Pleuronectes americanus, from Great Bay Estuary, New Hampshire

, 1995
Smooth flounder, Pleuronectes putnami, and winter flounder, Pleuronectes americanus, co-occur in estuaries along the east coast of North America from Labrador to Massachusetts.
Armstrong, Michael Patrick
core  

The reproductive physiology of witch flounder, Glyptocephalus cynoglossus

, 2004
The witch flounder (Glyptocephalus cynoglossus), or grey sole, as it is commonly known, is a member of the family Pleuronectidae (right eye flounders) and is found in the Northwest Atlantic near Hamilton Bank off southern Labrador, southward over ...
Short, Constance Elizabeth
core  

Impacts of Replacing Fish Meal With Duck By-Product Meal in Diets on Growth Performance, Feed Utilization, and Economic Efficiency of Olive Flounder (<i>Paralichthys olivaceus</i>). [PDF]

Aquac Nutr
Shin SW, Cho SH.
europepmc   +1 more source

Expression of Heat Shock Protein (HSP) 90 Homologue during Larval Development of Japanese Flounder Paralichthys olivaceus under Various Feeding Conditions(Note)

, 1998
P(論文)多くの魚類受精卵は浮上卵であり,太陽からの紫外線をはじめとした周囲の環境による影響を直接的に受けやすい海水面で分化し艀化に至る。また,ヒラメの場合においては,特に他の魚類と比べ艀化後約一月の間に大きな形態変化を伴っている。その形態変化は,艀化後約2日令における卵黄の吸収後に生じる肛門の前方移動に始まる。更に4日令においては色素沈着が開始し,6日令においては背鰭前端部鰭条(きじょう)の原基の出現が見られ,その後の約20日間で鰭条の伸長が完了し,体型の側偏及び右眼の移動が観察される ...
26250, 26251, 雨村, 明倫, 26249, 芦田, 貴行, 沖増, 英治   +5 more
core  

Phytoplankton flounder [PDF]

Nature Geoscience, 2010
openaire   +1 more source

Recreational fisheries as indicators of change: species range shifts from MRIP (1981-2024). [PDF]

BMC Zool
Roday RE, Hudock RE, Millea DR, Carlisle AB, Hale EA.   +4 more
europepmc   +1 more source

A Chiral Saddle‐Shaped Nanographene With Two Heptagon‐Embedded [4]Helicenes

Angewandte Chemie International Edition, EarlyView.
We present a novel synthetic strategy toward a chiral saddle‐shaped nanographene (cSNG) via a two‐step oxidation of a prochiral anthracene precursor. The Scholl‐type oxidation first yields a key intermediate with sp3‐defect heptagons, and subsequent oxidative dehydrogenation affords fully conjugated cSNG.
Felix Trautner, Boris Borrisov, Philipp Royla, Hongqing Zhao, Hartmut Komber, Li Wan, Evgenia Dmitrieva, Ji Ma, Jan J. Weigand, Qun Yang, Xinliang Feng, Wenhui Niu   +11 more
wiley   +1 more source