منابع مشابه
Electrofishing in Marine Fisheries
Electrofishing exploits the effects of electric fields on the target species to aid their capture. The challenge is to design the gear so that the electric field is strong enough to stimulate the target species and make it available for capture, while minimising any adverse effects on other species. Larger fish are more likely to be affected by an electric field than smaller fish, because for a...
متن کاملChinese Marine Capture Fisheries
This contribution reviews the development of Chinese marine fisheries and fleet structure since the founding of the People’s Republic of China (‘China,’ excluding Hong Kong, Macao, and Taiwan) in 1949, up to the present, with emphasis on the type and quality of underlying statistical information, especially on landings. Our main purpose is to provide a basis for evaluating the credibility of re...
متن کاملMarine and Coastal Fisheries
Pop-up satellite archival tags (n = 31) were deployed on Yellowfin Tuna Thunnus albacares in the Gulf of Mexico for periods ranging from 14 to 95 d. Differences in diel vertical behavior were assessed by comparing time spent at temperature relative to the surface temperature ( T). Pooled samples revealed that 31% of darkness hours, 20% of twilight hours, and 12% of daylight hours were spent in ...
متن کاملMarine and Coastal Fisheries
—The ability of fish to submerge after discarding is often used as a proxy for survival, but this practice underestimates total discard mortality because delayed mortality is overlooked. Fishery managers need a way to link ‘‘sink or swim’’ indicators, or variables observed during capture and release, with delayed mortality rates. We conducted a cage study of red snapper Lutjanus campechanus off...
متن کاملthe role of russia in transmission of energy from central asia and caucuses to european union
پس ازفروپاشی شوروی،رشد منابع نفت و گاز، آسیای میانه و قفقاز را در یک بازی ژئوپلتیکی انرژی قرار داده است. با در نظر گرفتن این منابع هیدروکربنی، این منطقه به یک میدانجنگ و رقابت تجاری برای بازی های ژئوپلتیکی قدرت های بزرگ جهانی تبدیل شده است. روسیه منطقه را به عنوان حیات خلوت خود تلقی نموده و علاقمند به حفظ حضورش می باشد تا همانند گذشته گاز طبیعی را به وسیله خط لوله مرکزی دریافت و به عنوان یک واس...
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ژورنال
عنوان ژورنال: NIPPON SUISAN GAKKAISHI
سال: 1989
ISSN: 1349-998X,0021-5392
DOI: 10.2331/suisan.55.25