USING STOCK ASSESSMENT TO INVESTIGATE THE SUSTAINABLE FISHERIES OF THE YELLOW MANDI Pimelodus maculatus IN THE UPPER URUGUAY RIVER, SOUTHERN BRAZIL
The yellow mandi Pimelodus maculatus is a medium-sized species with a wide geographical distribution. The species is very common in the Neotropical region, representing an important share of fishing activity in several Brazilian reservoirs. Therefore, the objective of this study was to evaluate the...
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Instituto de Pesca
2020-05-01
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| Online Access: | https://www.pesca.sp.gov.br/boletim/index.php/bip/article/view/1429/1430 |
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| author | Gianfrancisco Schork Samara Hermes-Silva Renata Maria Guereschi Evoy Zaniboni-Filho Alex Pires de Oliveira NUÑER |
| author_facet | Gianfrancisco Schork Samara Hermes-Silva Renata Maria Guereschi Evoy Zaniboni-Filho Alex Pires de Oliveira NUÑER |
| author_sort | Gianfrancisco Schork |
| collection | DOAJ |
| description | The yellow mandi Pimelodus maculatus is a medium-sized species with a wide geographical distribution. The species is very common in the Neotropical region, representing an important share of fishing activity in several Brazilian reservoirs. Therefore, the objective of this study was to evaluate the current situation of the yellow mandi fish stock in the Itá reservoir, located in the Upper Uruguay River. Data collected from January 2004 to December 2016 were used to estimate growth, mortality, and fish recruitment rates. In addition, a stock assessment was performed, and the results were used to verify the status of the fishery. The mean of the population parameters were: total length (L) = 55.65 cm; length at which 50% of fish are vulnerable to capture (Lc) = 23.08 cm, growth rate (k) = 0.260 year-1, growth performance index (Ø) = 3.047, natural mortality rate (M) = 0.537, fishing mortality rate (F) = 0.413, total mortality rate (Z) = 0.95, exploitation rate (E) = 0.434, maximum age (Tmax) = 6.68 years. The growth curve obtained via ELEFAN I revealed that fishing operates on eight of the eleven cohorts of the population. Yellow mandi stock assessment did not show signs of fish overexploitation or any risk of depletion. |
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| id | doaj-art-94b6f601189b416686bc48a7d72b0b1a |
| institution | DOAJ |
| issn | 0046-9939 1678-2305 |
| language | English |
| publishDate | 2020-05-01 |
| publisher | Instituto de Pesca |
| record_format | Article |
| series | Boletim do Instituto de Pesca |
| spelling | doaj-art-94b6f601189b416686bc48a7d72b0b1a2025-08-20T03:19:47ZengInstituto de PescaBoletim do Instituto de Pesca0046-99391678-23052020-05-0146110.20950/1678-2305.2020.46.1.535USING STOCK ASSESSMENT TO INVESTIGATE THE SUSTAINABLE FISHERIES OF THE YELLOW MANDI Pimelodus maculatus IN THE UPPER URUGUAY RIVER, SOUTHERN BRAZILGianfrancisco Schork0https://orcid.org/0000-0003-2085-6036Samara Hermes-Silva1https://orcid.org/0000-0001-8549-8191Renata Maria Guereschi2Evoy Zaniboni-Filho3https://orcid.org/0000-0001-6457-2655Alex Pires de Oliveira NUÑER4https://orcid.org/0000-0002-4682-3307Universidade Federal do Sul da BahiaUniversidade Federal de Santa Catarina (UFSC), Laboratório de Biologia e Cultivo de Peixes de Agua Doce (LAPAD).Universidade Federal de Santa Catarina (UFSC), Laboratório de Biologia e Cultivo de Peixes de Agua Doce (LAPAD).Universidade Federal de Santa Catarina (UFSC), Laboratório de Biologia e Cultivo de Peixes de Agua Doce (LAPAD).Universidade Federal de Santa Catarina - UFSCThe yellow mandi Pimelodus maculatus is a medium-sized species with a wide geographical distribution. The species is very common in the Neotropical region, representing an important share of fishing activity in several Brazilian reservoirs. Therefore, the objective of this study was to evaluate the current situation of the yellow mandi fish stock in the Itá reservoir, located in the Upper Uruguay River. Data collected from January 2004 to December 2016 were used to estimate growth, mortality, and fish recruitment rates. In addition, a stock assessment was performed, and the results were used to verify the status of the fishery. The mean of the population parameters were: total length (L) = 55.65 cm; length at which 50% of fish are vulnerable to capture (Lc) = 23.08 cm, growth rate (k) = 0.260 year-1, growth performance index (Ø) = 3.047, natural mortality rate (M) = 0.537, fishing mortality rate (F) = 0.413, total mortality rate (Z) = 0.95, exploitation rate (E) = 0.434, maximum age (Tmax) = 6.68 years. The growth curve obtained via ELEFAN I revealed that fishing operates on eight of the eleven cohorts of the population. Yellow mandi stock assessment did not show signs of fish overexploitation or any risk of depletion.https://www.pesca.sp.gov.br/boletim/index.php/bip/article/view/1429/1430growthmortalityfish stockuruguay river |
| spellingShingle | Gianfrancisco Schork Samara Hermes-Silva Renata Maria Guereschi Evoy Zaniboni-Filho Alex Pires de Oliveira NUÑER USING STOCK ASSESSMENT TO INVESTIGATE THE SUSTAINABLE FISHERIES OF THE YELLOW MANDI Pimelodus maculatus IN THE UPPER URUGUAY RIVER, SOUTHERN BRAZIL Boletim do Instituto de Pesca growth mortality fish stock uruguay river |
| title | USING STOCK ASSESSMENT TO INVESTIGATE THE SUSTAINABLE FISHERIES OF THE YELLOW MANDI Pimelodus maculatus IN THE UPPER URUGUAY RIVER, SOUTHERN BRAZIL |
| title_full | USING STOCK ASSESSMENT TO INVESTIGATE THE SUSTAINABLE FISHERIES OF THE YELLOW MANDI Pimelodus maculatus IN THE UPPER URUGUAY RIVER, SOUTHERN BRAZIL |
| title_fullStr | USING STOCK ASSESSMENT TO INVESTIGATE THE SUSTAINABLE FISHERIES OF THE YELLOW MANDI Pimelodus maculatus IN THE UPPER URUGUAY RIVER, SOUTHERN BRAZIL |
| title_full_unstemmed | USING STOCK ASSESSMENT TO INVESTIGATE THE SUSTAINABLE FISHERIES OF THE YELLOW MANDI Pimelodus maculatus IN THE UPPER URUGUAY RIVER, SOUTHERN BRAZIL |
| title_short | USING STOCK ASSESSMENT TO INVESTIGATE THE SUSTAINABLE FISHERIES OF THE YELLOW MANDI Pimelodus maculatus IN THE UPPER URUGUAY RIVER, SOUTHERN BRAZIL |
| title_sort | using stock assessment to investigate the sustainable fisheries of the yellow mandi pimelodus maculatus in the upper uruguay river southern brazil |
| topic | growth mortality fish stock uruguay river |
| url | https://www.pesca.sp.gov.br/boletim/index.php/bip/article/view/1429/1430 |
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