This study examines swimming in fish as a function of the performance of the locomotor musculature. Aspects of evolutionary adaptation and scaling relevant to swimming performance in fish are introduced. The concepts of resistance and capacity adaptations are illustrated in relation to the evolution of the suborder Notothenioidei to the antarctic environment. Alterations in hydrodynamics, swimming performance and efficiency with growth/scaling are discussed.

Submitted by Deyse Queiroz (deysequeirozz@hotmail.com) on 2018-06-14T13:39:33Z No. of bitstreams: 1 JAENE FRANCISCO DE SOUZA OLIVEIRA - DISSERTAÇÃO PPGEA 2010..PDF: 7189495 bytes, checksum: ea2d29073b35fe44ee6f5b7407f4116a (MD5) / Made available in DSpace on 2018-06-14T13:39:33Z (GMT). No. of bitstreams: 1 JAENE FRANCISCO DE SOUZA OLIVEIRA - DISSERTAÇÃO PPGEA 2010..PDF: 7189495 bytes, checksum: ea2d29073b35fe44ee6f5b7407f4116a (MD5) Previous issue date: 2010-08 / O objetivo desse estudo foi avaliar o crescimento de peixes durante a fase juvenil sob a interferência de diferentes luminosidades, utilizando quatro úpos de sombreamentos. O experimento foi realizado no setor de piscicultura, pertencente ao Centro de Ciências Agrárias da Universidade Federal da Paraíba, desenvolvida no período janeiro de 2009 a maio de 2010. O trabalho foi conduzido em 16 tanques-rede com malhagem de 2mm, com volume útil de lm3 , a uma profundidade média de 1 m, colocados em viveiro escavado. Os tanques-rede foram povoados com juvenis de tilápia do Nilo com peso médio inicial de 17,59±5,53g e comprimento médio total de 9,63±0,95, numa densidade de 60 peixes/m2, perfazendo um total de 960 peixes, distribuídos em 16 tanques. Durante o cultivo foram analisadas as seguintes variáveis de qualidade de água: transparência, oxigénio dissolvido, pH e temperatura. Foi estudado o desempenho zootécnico: ganho de peso (GP), ganho de peso relativo, ganho em comprimento (GC). O delineamento experimental foi o inteiramente casualizado (DIC), num esquema de parcela subdividida no tempo (Split Plot in Time), onde foram testados quatro tratamentos (100%,80%,70% e 50%), com quatro repetições cada, totalizando dezesseis parcelas. Os resultados demonstraram que os parâmetros físico-químicos da água analisados estavam dentro dos níveis aceitáveis. Foi observado que os melhores índices de desempenho de ganho de peso relativo foram obtidos no tratamento 80% e o tratamento 100% obteve o pior desempenho e o pior ganho de peso relativo (%) foi no o tratamento de 100% de entrada de luz (290,20%), já o tratamento de 80% foi mais satisfatório, pois obteve o melhor ganho de peso relativo (442,29%). / The objective of this study was to evaluate the growth of Nile tilápia (Oreochromis niloticus, During the juvenile phase in the interference of light using four types of shaders. The expenment was conducted by the sector of Fish Culture, belonging to the Centre for Agrarian Sciences, Federal University of Paraíba, was developed in the period January 2009 to May 2010. The work was conducted in 16 cages with mesh size of 2mm with a volume of lm3 , the depth average of 1 m, placed in earth pond. The cages were stocked with juvenile Nile tilápia with average imúal weight of 17.59 ± 5.53 g and average total length of 9.63 ± 0.95. Arriving at the site and after acclimation, fish were counted, weighed in batches and stored in tanks at a density of 60 peixes/m2, for a total of 960 fish distributed in 16 tanks. During cultivation, the following variables were analyzed water quality: transparency, dissolved oxygen, pH and temperature. We studied the growth performance: weight gain (WG), relative weight gain, gain in length (CG). The experimental design was completely randomized (CRD), in a split plot design in time (Split Plot in Time), where four treatments (100%, 80%, 70% and 50%) with four replicates each, totaling sixteen plots. The results showed that the physicalchemical parameters of water samples were within acceptable leveis. We observed the best performance index of relative weight gain was observed in treatment 80% and already the treatment of 100% had the worst performance. Water temperature values were similar for ali treatments. The worst relative weight gain (%) was in the treatment of 100% of incoming light (290.20%), although the treatment of 80% was more satisfactory because it had the best relative weight gain (442.29%).