نتایج جستجو برای: shad
تعداد نتایج: 396 فیلتر نتایج به سال:
—We estimated the variation in instantaneous rates of growth (G) and mortality (M) between intraannual cohorts of juvenile American shad Alosa sapidissima in the Pamunkey River, Virginia. The ages of juveniles captured by push net during the juvenile abundance index surveys in 1998 and 1999 were estimated by counting daily rings on the sagittal otoliths. Weight-at-age and abundance-at-age data ...
American Shad Alosa sapidissima is an anadromous clupeid that once supported a robust fishery but has declined drastically throughout its native range due to overfishing, dam proliferation, and poor water quality. A hatchery program on the James River in Virginia was introduced 1992 support recovery of stocks. Following moratorium enacted 1994, fisheries-independent survey initiated 1998 monito...
Forests are essential for sustaining ecosystems, regulating the climate, and providing economic benefits to human society. However, activities such as commercial practices, fuelwood collection, land use changes have resulted in severe forest degradation deforestation. Timor-Leste, a small island nation, faces environmental sustainability challenges due changes, limited infrastructure, agricultu...
S.-F. Mohammadi, A. Bazi-Shad, J. Akbarizadeh, E. Ashrafi, Z. Moinfar, E. Shirdel, M. Nabavi, S. Samiei, S. Salehi-Rad and A. W. Solomon 1) Center for Communicable Diseases Control, Ministry of Health and Medical Education, 2) Eye Research Center, Farabi Eye Hospital, 3) Community and Preventive Medicine Department, Tehran University of Medical Sciences, 4) Iranian Blood Transfusion Organizatio...
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