نتایج جستجو برای: catch per unit of effort
تعداد نتایج: 21195074 فیلتر نتایج به سال:
Abstract The solunar theory proposes that the position of sun and moon can be used to predict activity rates in fish game species. Several free premium services use this provide tables predicting optimal dates times for fishing hunting success. efficacy these was tested by comparing catch per unit effort (CPUE) a recreational freshwater trout fishery with daily values coincidence trips peak tim...
Chub mackerel (Scomber japonicus) is a major targeted species in the Northwest Pacific Ocean, fished by China, Japan, and Russia, predominantly captured with purse seine fishing gear. A formal stock assessment of region has yet to be implemented managing authority, that is, North Fisheries Commission (NPFC). This study aims provide wider choice potential models for using available data provided...
Sources of fisheries information outside fishery-independent surveys (e.g. fishery-dependent data) are especially valuable for species that support productive and lack reliable biological information, such as the northern shortfin squid ( Illex illecebrosus ). Fishery-dependent data streams available most species, however collaboration with industry members is critical to ensure these collected...
Population structure of three kilka fishes (Clupeonella spp.), particularly anchovy kilka (C. engrauliformis), in Iranian waters of the Caspian Sea was surveyed in 2003. A total of 3230 biweekly samples were collected from commercially landed kilka at 3 stations in Mazandaran and Guilan provinces. Catch and effort statistics were obtained from the relevant organization. Results showed a great d...
Potential of resource commodities contained in the waters Bali Strait needs to be studied for level utilization and sustainability. This research aimed analyze conditions lemuru fish resources sustainability status fisheries based on four aspects, namely ecological, economic, social, technological dimensions. Commodity condition is carried out with Catch Per Unit Effort (CPUE) analysis, while u...
abstract this study evaluates the iranian pre-university english textbook in terms of needs, objectives, content, and methodology. the study was designed on the qualitative- quantitative survey basis using interviews and questionnaires, a researcher-made textbook evaluation checklist and a needs analysis questionnaire. the textbook evaluation questionnaire was used in this study to elicit the ...
This paper reports the results from mobile hydroacoustic surveys carried out between 1994 and 2018, to assess fish stocks in four impounded reaches, covering 19.8 km of River Thames, England. The data are complemented with electric fishing boom boat results, collected at same study reaches time periods. Hydroacoustic used inter-calibrated dual split-beam scientific echosounders, transducers bea...
The Socotra Archipelago (Yemen), a group of four islands off the north-eastern tip Africa in western Indian Ocean, has population that relies heavily on small-scale fishing for livelihoods and food security. However, reporting fisheries catches by Yemen consistently been incomplete, with artisanal (small-scale, commercial) underreported non-commercial subsistence recreational not reported at al...
Researchers have applied numerous techniques to improve billfish stock assessments, including habitatbased models that incorporate behavioral and oceanographic parameters to standardize historical catch-per-unit-effort time-series data. These methods have allowed researchers to account for significant changes in the depths of pelagic longline (PLL) gear deployments over time. This study present...
—The glass eel is fished in the Gironde Basin, France, with large push nets, scoop nets, and the recently introduced small push net. This study uses fishery data to generate fisheries and abundance indicators for glass eels. Total catch, total effort, and catch per unit effort (CPUE) were calculated for the period 1978–1999 by classical statistical methods and by general linear models (GLM). Us...
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