Introduction Most tropical tunas captured by commercial and recreational fishers worldwide are “associated.” Sometimes this association is with natural structures such as seamounts or reefs or drifting logs, but increasingly these associations are with man-made fish aggregating devices—FADS. In fact, some researchers estimate that over 50%, by weight, of total tuna catch in the Indian and Pacif...

Canned tuna fish are frequently and largely produced and consumed in Iran and also exported. Therefore, their biogenic amines content should be of some concern to human health. In the present study, the levels of histamine, putrescine, tyramine and spermidine in 40 samples of canned tuna fish were determined. Histamine, as the major chemical hazard of seafood products, was detected in 57.5 % of...

A total of 600 crossbred pigs, whereof 56 were randomly selected for more in-depth studies of carcass and pork quality, were employed to test different tuna oil feeding regimens. The focus was put on the efficiency to enrich lean and adipose tissue with n-3 fatty acids and the expression of adverse side-effects on performance, carcass, and pork quality. The 4 treatments were 0% tuna oil in diet...

The by-product from tuna processing is a potential source of edible protein. Therefore, it is very important to extract protein from such raw materials for human food. In this study the optimum pH for protein extraction from tuna by-products was optimized by using isoelectric solubilization and precipitation processes. The Response Surface Methodology (RSM) and the single factor model were used...

Life-history traits such as spawning migrations and timing of reproduction are adaptations to specific environmental constraints and seasonal cycles in many organisms' annual routines. In this study we analyse how offspring fitness constrains spawning phenology in a large migratory apex predator, the Atlantic bluefin tuna. The reproductive schedule of Atlantic bluefin tuna varies between spawni...

This study reports the cardiovascular physiology of the Pacific bluefin tuna (Thunnus orientalis) in an in situ heart preparation. The performance of the Pacific bluefin tuna heart was examined at temperatures from 30 degrees C down to 2 degrees C. Heart rates ranged from 156 beats min(-1) at 30 degrees C to 13 beats min(-1) at 2 degrees C. Maximal stroke volumes were 1.1 ml x kg(-1) at 25 degr...

RANSFERRIN pol.ymorphism has been demonstrated by gel electrophoresis Tin many vertebrates. These include men (SMITHIES and HILLER 1959), monkeys (GOODMAN and POULIK 1961), cattle (ASHTON 1958; SMITHIES and HICKMAN 1958), sheep and goats (ASHTON and FERGUSON 1963; EFREMOV and BRAEND 1964), horses (BRAEND and STORMONT 1964), burros (NIECE and KRACHT 1967), pigs (ASHTON 1960a), mice (ASHTON and B...