Reproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone

Baker, L; Wiff, Rodrigo; Quiróz, Juan Carlos; Flores, Andrés; Céspedes, Renato; Barrientos, Mauricio A.; Ojeda, Vilma; Gatica, Claudio

doi:10.1007/s10641-013-0199-2

Cited by 9 publications

(10 citation statements)

References 28 publications

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“…Bajo este contexto, este estudio adquiere importancia debido a tres puntos. Primero, si se supone que la brótula conforma meta-poblaciones con parámetros de historia de vida meta-específicos, similar a la estructura de congrio dorado en Chile (Baker et al, 2014), existe un alto riesgo al extrapolar los parámetros de historia de vida de otras poblaciones (por ejemplo, la población atlántica) para su utilización en modelos de manejo aplicables a la población de brótula que habita el Océano Pacífico. Por esto la descripción del proceso de madurez de la brótula para la zona austral de Chile constituye un avance que tiene aportes directos a los futuros procesos de evaluación poblacional con fines de manejo.…”

Section: Resultsunclassified

Biologia reproductiva y aspectos poblacionales de la brotula (Salilota australis) en la zona sur austral de Chile: consideraciones para el manejo de la pesqueria

Follert

Contreras

Quiróz

2017

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RESUMEN.En este estudio se estimó la época principal de desove y la proporción de ejemplares maduros por longitud durante el periodo 1984-2006 en la zona sur-austral de Chile. El análisis macroscópico de las gónadas y las variaciones del índice gonadosomático indican presencia de ejemplares maduros durante todo el año con un periodo importante de desove entre agosto y septiembre. Se identificaron diferencias significativas en los procesos de madurez y crecimiento somático entre sexos, con hembras que alcanzan mayor tamaño y peso corporal. Salilota australis se ha convertido progresivamente en una especie objetivo para la pesquería demersal austral chilena, con longitud media de captura superior a la longitud en la cual el 50% de los ejemplares se encuentran maduros y alta disponibilidad de hembras. Debido a la desconocida vulnerabilidad de S. australis a la explotación pesquera, la descripción de los parámetros de vida debe ser tarea prioritaria en los programas de monitoreo de esta especie. Palabras clave: Salilota australis, longitud de madurez, desove, pesquería, sur de Chile. Reproductive biology and population traits of tadpole codling (Salilota australis) off Chilean southern austral zone: fishery management considerationsABSTRACT. The spawning period and proportion of length at maturity during the period 1984-2006 were investigated in a population of tadpole codling (Salilota australis) off southern austral zone, Chile. Macroscopic aspects and gonadosomatic index variability indicate the presence of mature individuals across the year with an important spawning period between August and September. Significant differences between sexes were detected in such processes, as maturity schedule and somatic growth, particularly in females which grow larger than males. Progressively S. australis has become an important target species for the austral demersal fleet in Chile, showing both an average catch length greater than the length at 50% maturity (LM) and high female fishery availability. In relation with the unknown vulnerability to overfishing of Salilota australis, the life history parameter analysis must be a priority needs within the monitoring fishing frameworks.

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Section: Resultsunclassified

Biologia reproductiva y aspectos poblacionales de la brotula (Salilota australis) en la zona sur austral de Chile: consideraciones para el manejo de la pesqueria

Follert

Contreras

Quiróz

2017

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“…The maximum reproductive period of S. caerulea and S. punctata (June–August) matched with other species inhabiting the same zone, such as July–September registered for M. australis and hoki Macruronus magellanicus Lönnberg 1907 (Balbontín & Bravo, ; Chong, ), August–September for G. blacodes and tadpole codling Salilota australis (Günther 1878) (Baker et al ., ; Chong et al ., ) and August for Mi. australis (Lillo et al ., ).…”

Section: Discussionmentioning

confidence: 95%

“…australis (Chong, ; Lillo et al ., ; Young et al ., ) showed constrained reproductive activity in winter, while the females with asynchronous gonadal development such as Me. australis and G. blacodes may reproduce from winter to spring (Baker et al ., ; Lillo et al ., ). Knuckey and Sivakumaran (), through histological analysis, suggested that females of S. brama from south‐east Australia are probably group‐synchronous spawners.…”

Section: Discussionmentioning

confidence: 99%

“…The maximum reproductive period of S. caerulea and S. punctata Macruronus magellanicus Lönnberg 1907 (Balbontín & Bravo, 1993;Chong, 2000), August-September for G. blacodes and tadpole codling Salilota australis (Günther 1878) (Baker et al, 2014;Chong et al, 2017) and August for Mi. australis (Lillo et al, 1994).…”

Section: Discussionmentioning

confidence: 99%

“…The estimated I GS increased gradually from the second Monthly mean fork length (L F ; ± range) for (a) Seriolella caerulea and (b) Seriolella punctata by sex: females ( ) and males ( ) from austral southernChile, 1984Chile, -2014. Vertical dashed line show the average fork length(L F ) for the entire study period T A B L E 1 Fork length (x)-total mass (y) relationship (y = ax b ) of Seriolella caerulea and Seriolella punctata by sex from samples off the southern austral zone ofChile, 1984-2014 Female (n = 10,569)…”

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confidence: 99%

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Reproductive biology and population structure of white warehou Seriolella caerulea and silver warehou Seriolella punctata in the austral zone off Chile

Liu

Flores

Quiróz

et al. 2019

Journal of Fish Biology

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Using an extensive database compiled by scientific observers aboard commercial fishing operations between 1984 and 2014, we describe the maturity and size structures of white warehou Seriolella caerulea and silver warehou Seriolella punctata from by‐catch of the trawling industrial fisheries operating in the austral zone off Chile. Macroscopic maturity stages and gonadosomatic (IGS) index show mature females throughout the year and a pronounced spawning period in both austral autumn and winter seasons, with an IGS peak in July for S. punctata and August for S. caerulea. Reproductive patterns in both species show an extended spawning season (July to September) across the area between 43 and 47° S. Length–mass relationships showed significant differences between sexes in both species, where females reach a larger size. Fork length at 50% maturity was 43.5 cm for S. caerulea and 37.2 cm for S. punctata. Female catch composition is dominated by adult fish (96% for S. caerulea and 86% for S. punctata). Currently, both species are exploited with no assessment and management‐decision framework. Therefore, information regarding reproductive biology and demographic traits becomes an important baseline to ensure adequate fisheries management for both species.

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Bayesian modeling of individual growth variability using back-calculation: Application to pink cusk-eel (Genypterus blacodes) off Chile

Contreras-Reyes

Quintero²,

Wiff

2018

Ecological Modelling

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Reproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone

Cited by 9 publications

References 28 publications

Biologia reproductiva y aspectos poblacionales de la brotula (Salilota australis) en la zona sur austral de Chile: consideraciones para el manejo de la pesqueria

Biologia reproductiva y aspectos poblacionales de la brotula (Salilota australis) en la zona sur austral de Chile: consideraciones para el manejo de la pesqueria

Reproductive biology and population structure of white warehou Seriolella caerulea and silver warehou Seriolella punctata in the austral zone off Chile

Bayesian modeling of individual growth variability using back-calculation: Application to pink cusk-eel (Genypterus blacodes) off Chile

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