Fish Swimming

Videler, John J.

doi:10.1007/978-94-011-1580-3

Cited by 871 publications

(834 citation statements)

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“…First, this task is dynamic and has a highly visual component, thus, perceptual strategies are very likely to play a crucial role in task processing. Second, it is a good example of the topic of biodiversity, which is a core topic in biology and part of the curriculum at school and university, because fishes are the most diverse vertebrates; besides a large diversity of forms, colors, and habitats, they are also very diverse in terms of their locomotion patterns (Videler, 1993).…”

Section: Describing Fish Locomotion Patternsmentioning

confidence: 99%

In the eyes of the beholder: How experts and novices interpret dynamic stimuli

Jarodzka

Scheiter

Gerjets

et al. 2010

Learning and Instruction

319

181

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Jarodzka, H., Scheiter, K., Gerjets, P., & Van Gog, T. (2010). In the eyes of the beholder: How experts and novices interpret dynamic stimuli. Learning and Instruction, 20, 146-154. doi:10.1016/j.learninstruc.2009.02.019Tasks with a complex, dynamic visual component require not only the acquisition of conceptual/procedural but also of perceptual/attentional skills. This study examined expertise differences in perceiving and interpreting complex, dynamic visual stimuli on a performance and on a process level, including perceptual and conceptual strategies. Performance, eye movement, and verbal report data were obtained from seven experts and 14 novices. Results show that experts compared to novices attend more to relevant aspects of the stimulus, use more heterogeneous task approaches, and use knowledge-based shortcuts. Implications for instructional design for the acquisition of perceptual skills are discussed

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Section: Describing Fish Locomotion Patternsmentioning

confidence: 99%

In the eyes of the beholder: How experts and novices interpret dynamic stimuli

Jarodzka

Scheiter

Gerjets

et al. 2010

Learning and Instruction

319

181

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“…At first, seabass in this study swam almost continuously, at a rather low swimming speed, which was deemed close to their optimum swimming speed, i.e. the speed at which the energy cost per distance traveled is lowest (Videler, 1993). At such speeds, a 10-cm seabass might presumably swim over 100 km without incurring an energy loss greater than 10% of its body energy, by reference to examples provided by Lucas and Baras (2001).…”

Section: Methodsmentioning

confidence: 84%

Growth heterogeneity in rearing sea bass (Dicentrarchus labrax): test of hypothesis with an iterative energetic model

Campeas

Brun-Bellut

Baras

et al. 2009

Animal

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This study aimed at modeling the relative importance of food intake on growth heterogeneity among cultured sea bass (Dicentrarchus labrax). First, we designed an individual growth model comprising five compartments (Energy intake, Losses, Net Energy, Recovered Energy and Maintenance). This model was calibrated with a first experiment carried out in eight tanks; A total of 130 juveniles (11 g) per tank were fed by a self-feeder (84 days, 208C, 16L : 8D, 30 g NaCl/l). A second experiment was performed to better understand the relation between individual food intake, individual growth and growth heterogeneity, using the model as a tool for a hypothetico-deductive approach on growth heterogeneity (135 passive integrated transpondertagged fish, same rearing conditions as above and individual food intake measured by X-ray every 14 days). The tested hypotheses were that food intake was (a) homogeneous, (b) proportional to the fish weight (i.e. to W 1.00 ) X-ray (c) proportional to W 0.66 and (d) reflected by the X-ray measurements of food intake. For each hypothesis, a simple linear regression between experimental and simulated results was produced. The Fitness indicators of these analyses, together with their confidence intervals (calculated by bootstrapping), allowed testing the relevance of these hypotheses. The analysis indicated that growth heterogeneity was largely accounted for by individual variations of food intake, as revealed by the X-ray analysis, and that food intake was proportional to W 1.00 , which suggests a dominance hierarchy where small fish are incapable of feeding maximally.Keywords: sea bass, growth, heterogeneity, energetic model IntroductionSize heterogeneity is a recurrent issue in aquaculture, since it largely facilitates the exercise of cannibalism (Baras and Jobling, 2002;Kestemont et al., 2003) and frequently imposes grading practices. Growth dispersal among cultured animals is not specific to fish, but it is generally more intense among fish than among other taxa. According to Gjedrem (2000), the coefficient of variation for body weight typically ranges from 7% to 10% in livestock farm animals, whereas it varies between 20% and 35% in most cultured fish species. Size heterogeneity has been extensively studied and attributed to a broad series of factors, of intrinsic or extrinsic nature. In brief, individual fish are likely to exhibit genuine capacities for growth that differ slightly, e.g., because their standard metabolic rates (Cutts et al., 2001;Bang et al., 2004) or digestive abilities are different (Lemieux et al., 1999), growth dispersal can be dependent on the degree of heterozygosity (Tiira et al., 2006). These factors are likely to be buffered or amplified by between-individual variations in food intake, which have been demonstrated on several occasions to be the driving factor behind growth depensation (e.g. Jobling and Baardvik, 1994). In theory, all environmental factors that impact on food intake and growth can impact directly on growth heterogeneity (Gelineau et al., 1998;Jo...

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“…The swimming performance of fish is not only related to the ecology of organisms that affects prey capture (Rincón et al 2007) and reproductive success (Videler 1993 Figura 2. Representação das medidas morfológicas: 1) comprimento padrão do corpo (CP), 2) altura máxima do corpo (ALMCp), 3) largura máxima do corpo (LMCp), 4) comprimento do pedúnculo caudal (CPd), 5) altura do pedúnculo caudal (ALPd), 6) largura do pedúnculo caudal (LPd), 7) comprimento da cabeça (CCa), 8) altura da cabeça (ALCa), 9) largura da cabeça (LCa), 10) altura do olho (ALO), 11) altura da boca (ALBo), 12) largura da boca (LBo), 13) comprimento da nadadeira dorsal (CND), 14) altura da nadadeira dorsal (ALND), 15) comprimento da nadadeira caudal (CNC), 16) altura da nadadeira caudal (ALNC), 17) comprimento da nadadeira anal (CNA), 18) altura da nadadeira anal (ALNA), 19) comprimento da nadadeira peitoral (CNPt), 20) altura da nadadeira peitoral (ALNPt), 21) comprimento da nadadeira pélvica (CNPv) e 22) altura da nadadeira pélvica (ALNPv).…”

Section: Discussionunclassified

“…4 Morphological characteristics may determine the body shape more efficient (streamlined bodies) to minimize drag and maximize thrust allowing swimming at high speeds for longer time. The shape streamlining considered the most ideal for a more efficient swimming is usually described by the fineness ratio (Scarnecchia 1988), with this attribute can evaluate the swimming performance of fish (Landweber 1961, Blake 1983, Videler & Wardle 1991, Videler 1993, Langerhans & Reznick 2010 Figura 3. Dendograma e ordenação pelo método MDS das medidas morfométricas de nove espécies de peixes migradores de longa distância do rio Paraná.…”

Section: Discussionmentioning

confidence: 99%

Morphological differentiation among migratory fish species from the Paraná River basin

Assumpção

Makrakis

et al. 2012

Biota Neotrop.

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This study characterized the morphological differences among migratory fish species from the Paraná River Basin. A total of 177 adult fish of Leporinus elongatus, Leporinus macrocephalus, Prochilodus lineatus, Salminus brasiliensis, Pimelodus maculatus, Pinirampus pirinampu, Pseudoplatystoma corruscans, Pterodoras granulosus, and Rhaphiodon vulpinus were sampled in the Canal da Piracema, a fish passage system at Itaipu Dam, Paraná River. The migratory species were analyzed through 22 morphometric measurements and fineness ratio to identify morphological patterns related to swimming performance. Four species groups were indicated by the Cluster analysis: I) R. vulpinus; II) P. corruscans; III) L. macrocephalus, L. elongatus, P. lineatus, P. maculatus, and S. brasiliensis -measurements of head height and anal fin length formed this group; and IV) P. granulosus and P. pirinampu -measurements of maximum body width and caudal peduncle width contributed to form this group. The morphometric variables that most contributed to the distinction were head length and mouth width for groups I and II. The species R. vulpinus and P. granulosus differed from other species, showing fineness ratios of 9.4 and 3.7, respectively. Leporinus elongatus, L. macrocephalus, P. lineatus, P. maculatus, and S. brasiliensis showed significant differences from other species, with ratios ranging from 4.57 to 5.19, indicating that these species may be better swimmers. Long-distance migratory species using the Piracema Canal to ascend upstream areas differed morphologically, morphological characteristics such as a narrow caudal peduncle and maximum body length, besides to the values of the fineness ratio, were essential to differentiate the migratory species. Keywords: morphology, swimming performance, fineness ratio, migratory fish. ASSUMPÇÃO, L., MAKRAKIS, M.C., MAKRAKIS, S., PIANA, P.A., SILVA, P.S., LIMA, A.F. & FERNANDEZ, D.R. Diferenciação morfológica entre espécies de peixes migradores da bacia do Rio Paraná. Biota Neotrop. 12(4): http://www.biotaneotropica.org.br/v12n4/pt/abstract?article+bn00512042012Resumo: Este estudo caracterizou as diferenças morfológicas entre espécies de peixes migradores da bacia do rio Paraná. Um total de 117 peixes adultos das espécies Leporinus elongatus, Leporinus macrocephalus, Prochilodus lineatus, Salminus brasiliensis, Pimelodus maculatus, Pinirampus pirinampu, Pseudoplatystoma corruscans, Pterodoras granulosus e Rhaphiodon vulpinus foram capturados no Canal da Piracema, um sistema de transposição para peixes na barragem de Itaipu, rio Paraná. As espécies migradoras foram analisadas através de 22 medidas morfométricas e razão fineza para identificar padrões morfológicos relacionados à capacidade natatória. Quatro grupos de espécies foram evidenciados pela Análise de Cluster: I) R. vulpinus; II) P. corruscans; III) L. macrocephalus, L. elongatus, P. lineatus, P. maculatus e S. brasiliensis, medidas de altura de cabeça e comprimento da nadadeira anal formaram este grupo; e IV) P. granulosus e P. pi...

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Fish Swimming

Cited by 871 publications

References 0 publications

In the eyes of the beholder: How experts and novices interpret dynamic stimuli

In the eyes of the beholder: How experts and novices interpret dynamic stimuli

Growth heterogeneity in rearing sea bass (Dicentrarchus labrax): test of hypothesis with an iterative energetic model

Morphological differentiation among migratory fish species from the Paraná River basin

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