Larval and juvenile growth of two Patagonian small pelagic fishes: Engraulis anchoita and Sprattus fuegensis
Patagonian anchovy (Engraulis anchoita) and sprat (Sprattus fuegensis) constitute the two most important pelagic resources of the Argentine Patagonian shelf. Age and growth parameters of larvae and juveniles of both species were determined analyzing otoliths daily increments. A total of 404 anchovie...
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| Format: | Article |
| Language: | English |
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Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
2020-12-01
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| Series: | Marine and Fishery Sciences |
| Subjects: | |
| Online Access: | https://ojs.inidep.edu.ar/index.php/mafis/article/view/117 |
| _version_ | 1818728195340369920 |
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| author | Daniel Brown Ramiro Pedro Sánchez |
| author_facet | Daniel Brown Ramiro Pedro Sánchez |
| author_sort | Daniel Brown |
| collection | DOAJ |
| description | Patagonian anchovy (Engraulis anchoita) and sprat (Sprattus fuegensis) constitute the two most important pelagic resources of the Argentine Patagonian shelf. Age and growth parameters of larvae and juveniles of both species were determined analyzing otoliths daily increments. A total of 404 anchovies (4.1-33 mm SL) and 157 sprats (5-41 mm SL) were analyzed. The Laird-Gompertz growth model was fitted to the length-at-age data of anchovies: L(t) = 4.2 exp (2.28 (1-(-0.034 t))). The parameters of the model were: L¥: 41.06 mm; the inflection point: 15.11 mm and 27 days; and the maximum growth rate: 0.51 mm day-1. The length-at-age data of sprat larvae and juveniles were represented in two linear models: L(t) = 0.32 t + 7.6; and L(t) = 0.22 t + 6.6. Slopes represented mean growth rates, 0.32 and 0.22 mm day-1 for larvae and juveniles, respectively. Variations in length-at-age between years were determined through the analysis of individual growth trajectories. Variations were found in sprats, not in anchovies. |
| first_indexed | 2024-12-17T22:26:08Z |
| format | Article |
| id | doaj.art-455387be92f1444e9853bb9b395cd612 |
| institution | Directory Open Access Journal |
| issn | 2683-7951 |
| language | English |
| last_indexed | 2024-12-17T22:26:08Z |
| publishDate | 2020-12-01 |
| publisher | Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) |
| record_format | Article |
| series | Marine and Fishery Sciences |
| spelling | doaj.art-455387be92f1444e9853bb9b395cd6122022-12-21T21:30:20ZengInstituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)Marine and Fishery Sciences2683-79512020-12-0120355092Larval and juvenile growth of two Patagonian small pelagic fishes: Engraulis anchoita and Sprattus fuegensisDaniel Brown0Ramiro Pedro Sánchez1Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)Subsecretaría de Pesca y Acuicultura (SSPyA) - Departamento de Ciencias Marinas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMdP)Patagonian anchovy (Engraulis anchoita) and sprat (Sprattus fuegensis) constitute the two most important pelagic resources of the Argentine Patagonian shelf. Age and growth parameters of larvae and juveniles of both species were determined analyzing otoliths daily increments. A total of 404 anchovies (4.1-33 mm SL) and 157 sprats (5-41 mm SL) were analyzed. The Laird-Gompertz growth model was fitted to the length-at-age data of anchovies: L(t) = 4.2 exp (2.28 (1-(-0.034 t))). The parameters of the model were: L¥: 41.06 mm; the inflection point: 15.11 mm and 27 days; and the maximum growth rate: 0.51 mm day-1. The length-at-age data of sprat larvae and juveniles were represented in two linear models: L(t) = 0.32 t + 7.6; and L(t) = 0.22 t + 6.6. Slopes represented mean growth rates, 0.32 and 0.22 mm day-1 for larvae and juveniles, respectively. Variations in length-at-age between years were determined through the analysis of individual growth trajectories. Variations were found in sprats, not in anchovies.https://ojs.inidep.edu.ar/index.php/mafis/article/view/117engraulis anchoitasprattus fuegensislarvaejuvenilesgrowthotoliths |
| spellingShingle | Daniel Brown Ramiro Pedro Sánchez Larval and juvenile growth of two Patagonian small pelagic fishes: Engraulis anchoita and Sprattus fuegensis Marine and Fishery Sciences engraulis anchoita sprattus fuegensis larvae juveniles growth otoliths |
| title | Larval and juvenile growth of two Patagonian small pelagic fishes: Engraulis anchoita and Sprattus fuegensis |
| title_full | Larval and juvenile growth of two Patagonian small pelagic fishes: Engraulis anchoita and Sprattus fuegensis |
| title_fullStr | Larval and juvenile growth of two Patagonian small pelagic fishes: Engraulis anchoita and Sprattus fuegensis |
| title_full_unstemmed | Larval and juvenile growth of two Patagonian small pelagic fishes: Engraulis anchoita and Sprattus fuegensis |
| title_short | Larval and juvenile growth of two Patagonian small pelagic fishes: Engraulis anchoita and Sprattus fuegensis |
| title_sort | larval and juvenile growth of two patagonian small pelagic fishes engraulis anchoita and sprattus fuegensis |
| topic | engraulis anchoita sprattus fuegensis larvae juveniles growth otoliths |
| url | https://ojs.inidep.edu.ar/index.php/mafis/article/view/117 |
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