Spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern Chile (2002–2007)

Spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern Chile (2002–2007)

Anchovy Engraulis ringens and common sardine Strangomera bentincki are two small pelagic fish that co-occur in the same reproductive habitat off central and southern Chile and have a similar reproductive strategy. Interannual and spatial changes in the batch fecundity of both fish were analyzed with...

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Autores principales: Cubillos, LA, Alarcón, C, Castillo-Jordán, C, Claramunt, G, Oyarzún, C, Gacitúa, S
格式: info:eu-repo/semantics/article
语言:eng
出版: Iniversidad Autónoma de Baja California 2011
在线阅读:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1749
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spelling repositorioinstitucional-20.500.12930-74292023-05-09T14:30:30Z Spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern Chile (2002–2007) Cambios espaciales y temporales en la fecundidad parcial de la sardina comúny anchoveta frente al centro y sur de Chile (2002–2007) Cubillos, LA Alarcón, C Castillo-Jordán, C Claramunt, G Oyarzún, C Gacitúa, S Anchovy Engraulis ringens and common sardine Strangomera bentincki are two small pelagic fish that co-occur in the same reproductive habitat off central and southern Chile and have a similar reproductive strategy. Interannual and spatial changes in the batch fecundity of both fish were analyzed with the purpose of detecting variability in the parameters and inferring different reproductive tactics that could affect the reproductive potential. Samples were obtained from adult surveys carried out to estimate spawning biomass by the Daily Egg Production Method, from 2002 to 2007, off Chile. The study area was divided into two zones: central and south. The batch fecundity was linearly related to ovary-free female body weight for each year. For anchovy, the slope was not different across years and zones, while for sardine, changes in intercept and slopes varied significantly among years, but not between zones. The average weight of mature females tended to be higher in the south zone for both species, and average batch fecundity ranged from 4,283 to 8,903 eggs per mature female anchovy, and from 5,901 to 10,414 eggs per mature female sardine. Although the anchovy and sardine reproductive strategy is similar, differences in batch fecundity seemed to be the main distinction between the species in the central and southern spawning sites off Chile, with implications for the reproductive potential.  La anchoveta Engraulis ringens y la sardina común Strangomera benticki son dos peces pelágicos menores que concurren en el mismo hábitat reproductivo frente a las costas del centro y sur de Chile, con una estrategia reproductiva similar. Se analizaron los cambios interanuales y espaciales en la fecundidad parcial de ambas especies con el fin de detectar la variabilidad en sus parámetros e inferir diferentes tácticas reproductivas que pudieran afectar su potencial de reproducción. Se obtuvieron muestras de ejemplares adultos para estimar la biomasa desovante mediante el Método de Producción Diaria de Huevos, de 2002 a 2007, frente a la costa de Chile. El área de estudio fue dividida en dos zonas, central y sur. La fecundidad parcial estuvo linealmente relacionada cada año con el peso corporal (sin los ovarios) de las hembras. Para la anchoveta la pendiente no mostró diferencias interanuales, ni entre zonas, mientras para la sardina la ordenada al origen y las pendientes tuvieron cambios interanuales significativos, pero no entre zonas. El promedio de peso de las hembras maduras de ambas especies tendió a ser mayor en la zona sur, y el promedio de fecundidad parcial varió entre 4,283 y 8,903 huevos por hembra madura de anchoveta, y entre 5,901 y 10,414 de sardina. A pesar de la similitud entre las estrategias reproductivas de las especies estudiadas, las diferencias encontradas en su fecundidad parcial perecen constituir una diferencia primordial entre sardina y anchoveta en su zona de desove frente a Chile, lo cual puede tener implicaciones en su potencial reproductivo. 2011-08-17 2021-06-03T03:55:17Z 2021-06-03T03:55:17Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1749 10.7773/cm.v37i4B.1749 https://hdl.handle.net/20.500.12930/7429 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1749/1692 application/pdf Iniversidad Autónoma de Baja California Ciencias Marinas; Vol. 37 No. 4B (2011); 547-564 Ciencias Marinas; Vol. 37 Núm. 4B (2011); 547-564 2395-9053 0185-3880
institution Repositorio Institucional
collection DSpace
language eng
description Anchovy Engraulis ringens and common sardine Strangomera bentincki are two small pelagic fish that co-occur in the same reproductive habitat off central and southern Chile and have a similar reproductive strategy. Interannual and spatial changes in the batch fecundity of both fish were analyzed with the purpose of detecting variability in the parameters and inferring different reproductive tactics that could affect the reproductive potential. Samples were obtained from adult surveys carried out to estimate spawning biomass by the Daily Egg Production Method, from 2002 to 2007, off Chile. The study area was divided into two zones: central and south. The batch fecundity was linearly related to ovary-free female body weight for each year. For anchovy, the slope was not different across years and zones, while for sardine, changes in intercept and slopes varied significantly among years, but not between zones. The average weight of mature females tended to be higher in the south zone for both species, and average batch fecundity ranged from 4,283 to 8,903 eggs per mature female anchovy, and from 5,901 to 10,414 eggs per mature female sardine. Although the anchovy and sardine reproductive strategy is similar, differences in batch fecundity seemed to be the main distinction between the species in the central and southern spawning sites off Chile, with implications for the reproductive potential. 
format info:eu-repo/semantics/article
author Cubillos, LA
Alarcón, C
Castillo-Jordán, C
Claramunt, G
Oyarzún, C
Gacitúa, S
spellingShingle Cubillos, LA
Alarcón, C
Castillo-Jordán, C
Claramunt, G
Oyarzún, C
Gacitúa, S
Spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern Chile (2002–2007)
author_facet Cubillos, LA
Alarcón, C
Castillo-Jordán, C
Claramunt, G
Oyarzún, C
Gacitúa, S
author_sort Cubillos, LA
title Spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern Chile (2002–2007)
title_short Spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern Chile (2002–2007)
title_full Spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern Chile (2002–2007)
title_fullStr Spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern Chile (2002–2007)
title_full_unstemmed Spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern Chile (2002–2007)
title_sort spatial and temporal changes in batch fecundity of common sardine and anchovy off central and southern chile (2002–2007)
publisher Iniversidad Autónoma de Baja California
publishDate 2011
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1749
_version_ 1792609018119716864

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