نتایج جستجو برای: fishing gears
تعداد نتایج: 16714 فیلتر نتایج به سال:
Aquatic invertebrates are excellent models for the study of animal feeding behavior and at the same time are very important fisheries resources that are frequently harvested using baited fishing gears. Studies on their chemical senses can bring a better understanding to the factors affecting feeding processes in simple organisms, as well as contribute to the development of better baiting techni...
I examined how the fitness (r) associated with early- and late-maturing genotypes varies with fishing mortality (F) and age-/size-specific probability of capture. Life-history data on Newfoundland's northern Atlantic cod (Gadus morhua) allowed for the estimation of r for individuals maturing at 4 and 7 year in the absence of fishing. Catch selectivity data associated with four types of fishing ...
According to portfolio theory applied to fisheries management, economic returns are stabilised by harvesting in a portfolio stocks of species whose returns are negatively correlated and for which the portfolio economic return variance is smaller than the sum of stock specific return variances. Also, variability is expected to decrease with portfolio width. Using a range of indicators, these pre...
The present study was an effort to provide overview of status fishing practices, gears and crafts used in fishing, common species caught by gear the 5 upzillas four districts Chalan beel. describes available beel, Bangladesh. carried out 7 spots under upazilas 4 such as Atrai upazila (Nawgaon), Singra upazila, Gurudaspur (Natore), Chatmohor (Pabna) Tarash (Sirajganj), respectively. Eye observat...
Together with life-history and underlying physiology, the behavioural variability among fish is one of the three main trait axes that determines the vulnerability to fishing. However, there are only a few studies that have systematically investigated the strength and direction of selection acting on behavioural traits. Using in situ fish behaviour revealed by telemetry techniques as input, we d...
The effectiveness of marine protected areas depends largely on whether people comply with the rules. We quantified temporal changes in benthic composition, reef fish biomass, and fishing effort among marine park zones (including no-take areas) to assess levels of compliance following the 2005 rezoning of the government-controlled Karimunjawa National Park (KNP), Indonesia. Four years after the ...
Marine debris is a growing global marine environmental issue. It causes negative and serious impacts on marine ecosystem, tourism, navigation safety, and fisheries. Derelict fishing gears (DFGs) have been considered as one of the major sources of marine debris in the Korean seas. The Korean government has implemented many policy measures to control DFGs since late 1990s. We compared three repre...
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