Despite attention focused on the population status and rebuilding trajectory of Atlantic bluefin tuna (Thunnus thynnus), the reproduction and spawning biology remains poorly understood, especially in the NW Atlantic. At present, the eastern and western spawning populations are believed to exhibit different reproductive characteristics and, consequently, stock productivity. However, our study su...

UNLABELLED Filtered smoke (FS) has been used to preserve taste, texture, and/or color in tuna and other fish species. This treatment is particularly important in color preservation during frozen storage. The objective of this study was to compare changes in the quality profiles of FS-treated and untreated (UT) yellowfin tuna (Thunnus albacares) steaks stored in 3 ways: room temperature (21 to 2...

Intrinsic water and soluble protein were removed from insoluble nuclear lens tissues of bigeye tuna, yellowfin tuna, and squid. These lens tissues were then used to absorb water and protein from extracts of nuclear tissue from these species. The quantity and type of absorption between the tunas were similar; between the tunas and squid, dissimilar. This indicates that nuclear lens tissue can be...

− Yellowfin and bigeye tunas (Thunnus albacores and Thunnus obesus) were tagged and released between August 1995 and December 1997 at Cross Seamount and NOAA weather buoys about 200 Nmi south of Honolulu. The release and recapture data were stratified into five sites, and a bulk transfer model was used to estimate natural mortality, fishing mortality and transfer rates between the five sites. B...

Abstract The spawning grounds of the Atlantic bluefin tuna ( Thunnus thynnus ) are traditionally considered to be Gulf Mexico (Gulf Mexico) and Mediterranean Sea (Mediterranean Sea). However, for western Atlantic, unequivocal evidence outside has been shown. In this study we present first records genetically confirmed larvae in southern Bay Biscay (eastern Atlantic). These findings provide acti...

The bluefin tuna heart remains at ambient water temperature (Ta) but must supply blood to warm regions of the body served by countercurrent vascular heat exchangers. Despite this unusual physiology, inherent difficulties have precluded an understanding of the cardiovascular responses to Ta in free-swimming bluefin tunas. We measured the heart rate (f(H)) responses of two captive Pacific bluefin...

Abstract Tuna fisheries have become the most important contributor to coastal central provinces of Vietnam since it was introduced in early 1990s. However, developing effective management guidelines for yellowfin ( Thunnus albacares ) and bigeye obesus tuna, main target species longline handline fisheries, is difficult because there no information on its growth characteristics. In particular, l...

We employed ultrasonic trans­ mitters to follow (for up to 48 h) the hor­ izontal and vertical movements of five juvenile (6.8–18.7 kg estimated body mass) bluefin tuna (Thunnus thynnus) in the western North Atlantic (off the eastern shore of Virginia). Our objective was to document the fishes’ behavior and distribution in relation to ocean­ ographic conditions and thus begin to address issues ...

Tuna fisheries catch over three million tonnes of skipjack tuna (Katsuwonus pelamis) each year, the majority of which come from purse-seine vessels targeting fish associated with man-made fish aggregating devices (FADs). A significant challenge for fisheries management is to maximize the efficiency of skipjack tuna catches whilst minimizing the bycatch of small and immature bigeye (Thunnus obes...