to investigate the optimum conditions for extracting gelatin from whitecheek shark (carcharhinus dussumieri (skin, response surface methodology (rsm) has been adopted. in this research, the effect of naoh concentration (0.01-1 n), hcl concentration (0.01-1 n), and extraction time (3-8 h) on dependent variables, yield and melting point of the skin gelatin have been studied using central composit...

Differences in the allometric scaling between gut capacity (with body mass, BM¹·⁰⁰) and food intake (with BM⁰·⁷⁵) should theoretically result in a scaling of digesta retention time with BM⁰·²⁵ and therefore a higher digestive efficiency in larger herbivores. This concept is an important part of the so-called 'Jarman-Bell principle' (JBP) that explains niche differentiation along a body size gra...

Marine biology,marine ecology,Phytoplankton, marine algae, zooplankton, nekton, benthos, corals and coral reefs, ecology, zoogeography systematics, primary production experimental work on ecosystem including energy flow at different trophic levels, population dynamics theoretical models, recycling of matter, influence environmental factors metabolic activity, microbiology, mariculture propagati...

in this paper age determination and morphological characteristics of blacktip catfish, plicofollis dussumieri, from oman sea were evaluated. a total of 132 fish specimens were collected from fishing trawlers or landings from march 2011 to july 2012, with minimum and maximum of 245 mm, 195 g; and 767 mm, 5801 g, respectively. maximum life span was 12 years for the length range of 245 – 767 mm fl...