In this paper, 981 reared juveniles of gilthead seabream (Sparus aurata) were analysed, 721 of which were from a commercial hatchery located in Northern Italy (Venice, Italy) and 260 from the Hellenic Center for Marine Research (Crete, Greece). These individuals were from 4 different egg batches, for a total of 10 different lots. Each egg batch was split into two lots after hatching, and reared...

Regional tuna fishery management organizations cannot provide specific advice to local fishery managers in small island jurisdictions. The State of Hawaii maintains time series of yellowfin tuna catches dating back to 1949, but these data have never been formally applied to evaluating the effects of the yellowfin fishery in the Main Hawaiian Islands on the local stock. I develop a new approach ...

This paper presents a progress report on the application of a length-based age-structured model (Fournier et al. in press) to the integrated analysis of western and central Pacific yellowfin tuna catch, effort, size and tagging data. This project was developed by a small working group of the Western Pacific Yellowfin Research Group (WPYRG), and has been funded by the University of Hawaii Pelagi...

Investigating the influence of plastein reaction on reducing the bitterness and offending smell of protein hydrolysates from yellowfin tuna offal. Protein hydrolysates of yellowfin tuna offal was prepared firstly, then the factors including pH value, kinds of enzymes, temperature and substrate concentration on influencing the nitrogen recovery and bitterness were separately evaluated and the co...

We apply an advection–diffusion reaction model to data from three different tuna tagging experiments in the western and central Pacific Ocean (WCPO) to reexamine the question of to what extent the population dynamics and spatial characteristics of tropical tunas require international cooperation for effective management. The median lifetime displacement of skipjack ranges from 420 to 470 nautic...

Executive Summary This paper represents part of the response to the independent review of the 2011 bigeye tuna (BET) stock assessment, specifically the examination of changes in targeting within the Japanese longline fishery operating to the tropical western and central Pacific Ocean (WCPO). This work was undertaken at the National Institute for Far Seas Fisheries (NIFSF) in Shimizu Japan over ...

Monophasic action potentials (MAPs) were recorded from the spongy and compact layers of the yellowfin tuna Thunnus albacares ventricle as stimulation frequency was increased. MAP duration decreased with increase in stimulation frequency in both the spongy and compact myocardial layers, but no significant difference in MAP duration was observed between the layers.

Fish are constantly exposed to microorganisms in the aquatic environment, many of which are bacterial pathogens. Bacterial pathogens activate the innate immune response in fish involving the production of pro-inflammatory molecules that, in addition to their immune-related role, can affect non-immune tissues. In the present study, we aimed at investigating how inflammatory responses can affect ...

The present study was undertaken to determine whether T3, estrogen, and 11-ketotestosterone could alter a specific population of GnRH-containing neurons, as indicated by a change in messenger RNA (mRNA) levels in sexually immature male tilapia, Oreochromis niloticus. Two weeks after castration, fish were assigned to four treatment groups. One group served as the control (sesame oil); a single i...

The skin is the first barrier of defence in fish, protecting against any external stressor and preserving the integrity and homeostasis of the fish body. The aim of this study was to characterise gilthead seabream skin by isolating cells and studying the cell cycle by flow cytometry, to study the skin histology by scanning electron microscopy and the transcription level of some immune-relevant ...