Aging and growth parameter from the Piaractus mesopotamicus (pacu) from the Cuiabá river, Mato Grosso, Brazil
| العنوان: | Aging and growth parameter from the Piaractus mesopotamicus (pacu) from the Cuiabá river, Mato Grosso, Brazil |
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| المؤلفون: | Marina S. Zuliani, Thiago José Balbi, Edson Kiyoshi Okada, Luiz Carlos Gomes, Talitha Mayumi Francisco, Angela Maria Ambrosio |
| المصدر: | Iheringia: Série Zoologia, Vol 104, Iss 4, Pp 413-417 (2014) Iheringia. Série Zoologia v.104 n.4 2014 Iheringia. Série Zoologia Fundação Zoobotânica do Rio Grande do Sul (FZB/RS) instacron:FZB/RS |
| بيانات النشر: | Fundação Zoobotânica do Rio Grande do Sul, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Marcas de aposição, biology, Ecology, scales, Growth rings, Von bertalanffy, biology.organism_classification, von Bertalanffy model, Ford-Walford, Pacu, escamas, Piaractus mesopotamicus, Animal science, modelo de von Bertalanffy, Consistency (statistics), Growth parameter, Ford-walford, Linear regression, lcsh:Zoology, Fish |
| الوصف: | This study has aims to determine the age and to estimate the growth parameters using scales of the species. Individuals of Piaractus mesopotamicus (Holmberg, 1887) used in this study were captured in the commercial fishery conducted in the region, along the year 2006. The model selected to express the growth of the species was the von Bertalanffy Sl= Sl∞*[1-exp-k(t-to)]. To determine if scales are suitable for studying the growth of pacu, we analyzed the relation between standard length (Sl) and the radius of the scales through linear regression. The period of annuli formation was determined analyzing the variations in the marginal increment and evaluating the consistency of the readings through the analysis of the coefficient of variations (CVs) for the average standard lengths of each age (number of rings) observed in the scales. The relationship between Ls of the fish and the radius of the scales showed that scales can be used to study the age and growth of P. mesopotamicus (R= 0.79). CVs were always below 20%, demonstrating the consistency of the readings. Annuli formation occurred in February, probably related to trophic migration that occurs in this month in the region. Equations that represents the growth in length obtained for P. mesopotamicus are Sl=50.00*[1-exp-0.18(t-(-3.00)] for males and Sl=59.23*[1-exp-0.14(t-(-3.36)] for females. The growth parameters obtained in this study were lower compared to other studies previously conducted for the same species and can related to overexploitation that species is submitted by fishing in the region. These values show also that females of pacu attain greater asymptotic length than males that growth faster. |
| وصف الملف: | text/html |
| اللغة: | English |
| تدمد: | 1678-4766 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::440d0a1b59a07a57ae4410717b9e9d75 http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000400004&lng=en&tlng=en |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....440d0a1b59a07a57ae4410717b9e9d75 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 16784766 |
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