نتایج جستجو برای: growth and fishing indices

تعداد نتایج: 16941550  

D. Kor E. Nabavi Jelodar H. Azari H. Fazli, H. Taleshian M. Moghim

    The length-weight relationship, age, growth parameters, sex ratio, mortality and exploitation rate of Salmo trutta fario were determined in Lar dam. The sex ratio (male: female) was 1:1.84 which differed significantly from the expected 1:1. The length-weight regression was (females) and (males) indicating a negative allometric growth for both sexes. Growth parameters were estimated as L∞ = ...

A. Vahabnezhad E. Kamrani M. Ghodrati Shojaei M. Hakimelahi, S.A. Taghavi Motlagh

  The aim of the present study was to investigate the population dynamics of Liza klunzingeri, in Hormouzgan province waters located in northern coasts of the Persian Gulf and Oman Sea. This study was carried out from October 2007 to September 2008. samples were collected from commercial stake traps. The relationship between weight and fork length was found to be W= 0.0214 F.L2.8233 suggesting ...

2011
Kari H. Fenske Michael J. Wilberg David H. Secor Mary C. Fabrizio

American eel (Anguilla rostrata) and European eel (Anguilla anguilla) populations have declined since the 1980s prompting concern about their status and the causes of decline, but stock assessment approaches to estimate effects of fishing on these populations are lacking. Since 1964, 16% of United States commercial American eel harvest came from the Potomac River, yet American eel abundance, pr...

Journal: :international journal of advanced biological and biomedical research 2014
sasan teimouri javad hasanpour ali akbar tajali

an experiment was conducted in order to evaluate the effects of se spraying on yield and growth indices of wheat under drought stress condition, in agriculture and natural resource research center of tehran province in 2011-12. a split plot layout within randomized complete block design with three replications were used. main plots were three irrigation treatments (normal irrigation, non-irriga...

Journal: :پیشرفت های حسابداری 0
مصطفی افشار رامین زمانی عموقین

vol. 6, no. 1, 2014, ser. 66/3     extended abstract   explaining the relationship indices of the performance evaluation and rank performance with the growth of the companies   m. afshar                                          r. zamani amugheen molana higher education, abyek, qazvin   introduction        due tocompetition in the global economy and an increase in public awareness about the fin...

Journal: :Sustainability 2021

Multiple studies reveal pre-1492 anthropogenic impacts on Caribbean fisheries that are consistent with overfishing, including changes in targeted prey, shifts marine habitats exploited, and decreases the average body size of taxa. At Indigenous village Sabazan (AD 400–1400) Carriacou, Lesser Antilles, post-AD 800 declines fishing, increased mollusk collection, resource patch emphasis accord arc...

Journal: :journal of rangeland science 2015
mohammad reza shahraki naghmeh gholami baghi mohsen sharafatmandrad bahareh behmanesh

rangelands are the main sources of forage for livestock feeding by localpeople. beside forage production, rangeland ecosystems provide many other goods andservices such as medicinal plants, recreation, soil and water conservation, wildlife habitat,fishing, hunting, hiking, etc. nevertheless, there are no much information about the waythat local communities think about the rangelands goods and s...

F. Şen, Ö. Kara

This study was carried out to determine population structure, growth and reproduction properties of barbel. A total of 198 individuals were sampled. Ages of samples were found between I and VI years, fork lengths between 4.3 and 16.6 cm and total weights between 1.2 and 65.8 g. Length-weight relationship was calculated as W=0.0146×L2.934. Munro’s phi prime index was estimated as 1.95, L∞ ...

Journal: :iranian journal of fisheries science 0
b. md. rahman z. md. sazedul hoque m. md. rahman a. nahar

agunmukha river is an important water body having plentiful aquatic resources. the fisheries communities in the river are familiar with a diverse range of fishing gear and crafts to catch fish. therefore, the objectives of the present study were to explore fishing gear and fishing crafts, catch composition of the respective gearand identification of fish biodiversity of agunmukha river. a step ...

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