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...

A 19-year-old white man was referred to the pulmonary clinic with a 2-month history of refractory cough, low-grade fevers, night sweats, and 30-lb weight loss. He had right-sided pleuritic pain and episodic scant hemoptysis. He denied smoking and using illicit drugs. He was single and had protected sex with two female partners over the past several years. He worked as a pipe fitter and denied a...

The use of plant extract as poisons for hunting and fishing is common among fishermen of various countries. Fish poisons from plants are also known as piscicides or inchthyotoxins. Several plant species are known to possess bioactive compounds that are toxic to fish. The piscicidal activity of methanolic latex extracts of Euphorbia antiquorum plant belonging to Family: Euphorbiaceae against Poe...

Several insectivorous bats have included fish in their diet, yet little is known about the processes underlying this trophic shift. We performed three field experiments with wild fishing bats to address how they manage to discern fish from insects and adapt their hunting technique to capture fish. We show that bats react only to targets protruding above the water and discern fish from insects b...

The conservation of seabirds requires maintenance and enhancement of their populations by reducing losses at sea and on breeding colonies. The two major methods of achieving this conservation goal use fundamentally different means. Limiting seabird mortality at sea, principally from oil spills or fishery bycatch, requires political and legal skills in dealing with industry, changing fishing tec...

How can species be exploited economically to extinction? Past single-species hypotheses examining the economic plausibility of exploiting rare species have argued that the escalating value of rarity allows extinction to be profitable. We describe an alternative pathway toward extinction in multispecies exploitation systems, termed 'opportunistic exploitation'. In this mode, highly valued specie...

in this study, 160 fishes were randomly collected from commercial catch by a cone net in babolsar port from january to october 2010. the biological features of specimens were measured. 2 + years old fishes made the dominant age group with 33.75% and 1 + and 5 + years old had the least frequency (8.75%). relationship between length and weight indicated negative allometric growth pattern (b=2.581...

This paper used the Data Envelopment Analysis (DEA) to measure the technical efficiency of fishing vessels in Haizhou Bay, and then used the Tobit regression to define its influencing factors. This study shows that the overall fishing capacity utilization of fishing vessels at present is very low which indicates that there is a serious waste of resources problem in Haizhou Bay. Specifically, th...