Tunas are capable of exceptionally high maximum metabolic rates; such capability requires rapid delivery of oxygen and metabolic substrate to the tissues. This requirement is met, in part, by exceptionally high maximum cardiac outputs, opening the possibility that myocardial Ca(2+) delivery is enhanced in myocytes from tuna compared with those from other fish. In this study, we investigated the...

Caudal-fin-based swimming is the primary form of locomotion in most fishes. As a result, many species have developed specializations to enhance performance during steady swimming. Specializations that enable high swimming speeds to be maintained for long periods of time include: a streamlined body, high-aspect-ratio (winglike) caudal fin, a shallow caudal peduncle, and high proportions of slow-...

Landeira-Fernandez, Ana M., Jeffery M. Morrissette, Jason M. Blank, and Barbara A. Block. Temperature dependence of the Ca -ATPase (SERCA2) in the ventricles of tuna and mackerel. Am J Physiol Regul Integr Comp Physiol 286: R398–R404, 2004. First published November 6, 2003; 10.1152/ajpregu.00392.2003.—Recent physiological studies on the cardiovascular performance of tunas suggest that the eleva...

Tunas (Scombridae) have been assumed to be among the fastest and most efficient swimmers because they elevate the temperature of the slow-twitch, aerobic locomotor muscle above the ambient water temperature (endothermy) and because of their streamlined body shape and use of the thunniform locomotor mode. The purpose of this study was to test the hypothesis that juvenile tunas swim both faster a...

The East Coast of Sumatra is protected from the fierceness Indian Ocean. number rivers that flow makes coastal waters have high nutrients. Rupat Strait one central areas for catching shrimp using sondong fishing gear. This study aims to determine and inform composition catch (amount type) rate gear in Pangkalan Sesai Village, West Dumai District, City, Riau Province. Data collection was carried...

Northeast Atlantic (NEA) mackerel (Scomber scombrus, Scombridae) represents an economically important target for the Norwegian pelagic fishing industry. Despite commercial significance of NEA mackerel, little is known about infections with myxosporean parasite Kudoa thyrsites (Kudoidae). The may cause post-mortem myoliquefaction fish skeletal muscle and therefore reduce quality product. In this...

Behavioral ontogeny of marine pelagic fishes is reviewed in the context of sustainable fisheries resource management. In carangid fishes, development of sensory organs corresponds with their basic behavior such as phototaxis and optokinetic response, whereas the onset of schooling requires the development of the central nervous systems (CNS). Because docosahexaenoic acid (DHA) is indispensable ...

We used fishery catch data from Cilacap Fishing Port and Copernicus set in July 2016-December 2017 to investigate the impacts of Indian Ocean Dipole (IOD) on upwelling mackerel tuna distribution southern coast Java. This study implemented a Generalized Additive Model (GAM) for habitat prediction waters. The present showed that extreme negative IOD 2016 caused weaker southeasterly wind even reve...

Observers were placed on pelagic vessels in the Scottish fisheries for mackerel (Scomber scombrus), herring (Clupea harengus), “maatje” herring (herring caught just before their first spawning) and argentines (Argentina silus) to monitor by-catch composition and discarding practices. A total of 67 days was spent at sea, 11 on the argentine fleet, 28 on the herring fleet, 12 on the “maatje” herr...

Determination of K-value (fish freshness index) and histamine (Hm) of mackerel and tuna during storage at various temperatures was done by using the oxygen-sensor method. Hm in mackerel increased even at low temperature (5 degrees C), and reached the Defect Action Level (DAL) of the U.S. FDA, 5 mg/100 g, before the K-value approached the inedible level. As the storage temperature was increased,...