Acanthogyrus (Acanthosentis) tilapiae parasites were collected from the intestines of 300 fish belonging to three tilapia species sourced at the River Nile, Giza, Egypt. The proboscis of the parasite was characterized by three rows of hooks that curved towards the posterior of the body. The first row is supported by unmodified hooks. The parasite tegument has a series of alternative folds and a...

Abstract The effects of tori-line streamer types on seabirds avoidance were examined with the data from Japanese observer program in southern bluefin tuna fishery. Nominal catch rates (catch/1000 hooks) and per-capita catch rates (catch/1000 hooks/albatross abundance) were compared between “WCPFC type” streamers and “Light type” (polypropylene band) streamers. There was no significant differenc...

Many textbooks contain material on partitions. Two standard references are [A] and [S]. A partition of a natural integer n with parts λ1, . . . , λk is a finite decreasing sequence λ = (λ1 ≥ λ2 ≥ · · · ≥ λk > 0) of natural integers λ1, . . . , λk > 0 such that n = ∑k i=1 λi. We denote by |λ| the content n of λ. Partitions are also written as sums: n = λ1 + · · ·+ λk and one uses also the (abusi...