نتایج جستجو برای: natural and fishing mortality
تعداد نتایج: 16915710 فیلتر نتایج به سال:
cml in breif cml is characterized by the proliferation of large numbers of immature wbc in the blood and bone marrow. in most of the patients , it is a clonal disorder in which all cell lines, express the philadelphia chromosome)q/22 translocation(it accounts for 20 of all leukemias and most cases occur over 25 yrs of age. the disease usually begins insidiously,but symptoms referable to anemia ...
Changes in assessment methodology: Assessment of squids is challenging due to a lack of reliable data and their unusual life history. In this document we suggest several alternatives for calculating ABC and OFL using the NPFMC’s tier system. Tier 5 requires reliable estimates of biomass and natural mortality rate (M). Under Tier 5, OFL is calculated as M * biomass, while ABC = 0.75 * M * biomas...
Over the last decades, views on fisheries management have oscillated between alarm and trust in management progress. The predominant policy for remedying the world fishing crisis aims at maximum sustainable yield (MSY) by adjusting gear selectivity and fishing effort. Here we report a case study on how striving for higher yields from the Eastern Baltic cod stock by increasing selectivity has be...
Fishing is one of the oldest human activities in the Pantanal of Mato Grosso in Central Brazil. In the of Bento Gomes River Basin (Pantanal of Poconé) the presence of fishermen is very common. The objective of this study is to describe the fishing activity in the basin in view of the elaboration of proposals for the sustainable use of this natural resource. Of the 256 fishermen that were regist...
BACKGROUND The communities in fishing villages in the Great Lakes Region of Africa and particularly in Uganda experience recurrent cholera outbreaks that lead to considerable mortality and morbidity. We evaluated cholera epidemiology and population characteristics in the fishing villages of Uganda to better target prevention and control interventions of cholera and contribute to its elimination...
1. Climate change is emerging as one of the greatest threats to coral reef ecosystems. Climate-induced warming events trigger coral bleaching and mortality, which can indirectly affect coral reef fishes. Managing fisheries across coral mortality events is expected to influence the persistence of species and reef recovery potential. The most common management recommendation has been to prohibit ...
22 Despite the economic importance of Pandalus shrimp fisheries, few analytical tools have been 23 developed to assess their stocks and traditional stock assessment models are not appropriate 24 because of biological specificities of Pandalus species. In this context, we propose SPAM, a 25 model dedicated to protandric hermaphrodite Pandalids stock assessment. Pandalids are difficult 26 to asse...
Abstract Background The present study assessed the growth and mortality parameters of white sardine, Escualosa thoracata which is having high local demand. sardine gained importance due to its taste, demand in domestic markets as compared oil necessitated a on this resource know status exploitation level along central west coast India. Results A total 3026 individuals different size groups E. w...
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