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Critical swim speed (U(crit)) measurements show that trout (Oncorhynchus mykiss) with an intact spleen perform aerobic exercise better than those without (control: U(crit) = 2.19 body lengths/s; splenectomized: U(crit) = 1.84 body lengths/s). Their better performance is correlated with higher blood ...
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1. Mdx mice were used as a model for Duchenne muscular dystrophy; both lack dystrophin. It was hypothesized that the mdx condition would have a marked effect on the ability of diaphragm muscle from mdx mice to do active net work and generate power. This hypothesis was tested using the work-loop tech...
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Fast-start acceleration performance of rainbow trout (Salmo gairdneri) was measured after 9 weeks of sprint training (30 s duration, every 2nd day). Response latency and time required to complete the first two stages of a fast start were unaffected by the sprint-training protocol. Maximum accelerati...
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The incorporation of ammonia into glutamine, catalyzed by glutamine synthetase, is thought to be important in the detoxification of ammonia in animals. During early fish development, ammonia is continuously formed as yolk proteins and amino acids are catabolized. We followed the changes in ammonia a...
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Shyness and boldness has been considered a fundamental axis of human behavioural variation. At the extreme ends of this behavioural continuum subjects vary from being bold and assertive to shy and timid. Analogous patterns of individual variation have been noted in a number of species including fish...
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In two separate experiments, we investigated the effects of different types of suture material and patterns on wound healing in rainbow trout Oncorhynchus mykiss with (n=24) and without transmitter implants (n=35). We used absorbable and nonabsorbable monofilament and braided silk sutures in simple ...
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Passive integrated transponder (PIT) tagging is a commonly used procedure to identify fish. However, there is a lack of research on the short-term effects of such tagging. The purpose of our study was to measure the short-term effects of PIT tagging on the feeding behavior and swimming performance o...
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Muscle temperature was measured by telemetry in giant Atlantic bluefin tuna whilst the tuna were free-swimming in large pounds. Muscle temperature tended to remain steady at about 24 degreesC; water temperature ranged from 9 to 17 degreesC. Muscle temperature was much less Variable than stomach temp...
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Isolated rat diaphragm muscle was stimulated repetitively to induce fatigue, and the work done during each contraction was measured. Work per cycle was calculated by measuring force as the activated muscle was subjected to sinusoidal length changes (from 97 to 103% of L(0), where L(0) is rest length...
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Numerous environmental features have the potential to act as 'barriers' to fishes in the field. Passage of these 'barriers' depends on two main properties: willingness (behavioural) and physiological capacity. The physiological swimming capacity of fishes has been well studied. However, because most...
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This study is the first to examine the contractility of teleost ventricular muscle in an oscillating muscle preparation. The experiments were designed to test the relative importance of Ca2+ released from the sarcoplasmic reticulum (SR) and Ca2+ influx across the sarcolemma (SL) to cardiac performan...
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