Spatiotemporal distribution of the reproductive potential of the female squat lobster (Pleuroncodes monodon) stock in central and southern Chile

Spatiotemporal distribution of the reproductive potential of the female squat lobster (Pleuroncodes monodon) stock in central and southern Chile

Pleuroncodes monodon is 1 of the 3 species sustaining the demersal crustacean fisheries in Chile, with landings that have had strong variations and a very slow recovery in the past decade. The southern fishing unit has been in the recovery status since 2017, following several years of intense overfi...

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التفاصيل البيبلوغرافية
المؤلفون الرئيسيون: Barros, Mónica E, Alarcón, Rubén, Arancibia, Hugo
التنسيق: Online
اللغة:eng
spa
منشور في: Iniversidad Autónoma de Baja California 2023
الوصول للمادة أونلاين:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3321
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id oai:cienciasmarinas.com.mx:article-3321
record_format ojs
institution Ciencias Marinas
collection OJS
language eng
spa
format Online
author Barros, Mónica E
Alarcón, Rubén
Arancibia, Hugo
spellingShingle Barros, Mónica E
Alarcón, Rubén
Arancibia, Hugo
Spatiotemporal distribution of the reproductive potential of the female squat lobster (Pleuroncodes monodon) stock in central and southern Chile
author_facet Barros, Mónica E
Alarcón, Rubén
Arancibia, Hugo
author_sort Barros, Mónica E
title Spatiotemporal distribution of the reproductive potential of the female squat lobster (Pleuroncodes monodon) stock in central and southern Chile
title_short Spatiotemporal distribution of the reproductive potential of the female squat lobster (Pleuroncodes monodon) stock in central and southern Chile
title_full Spatiotemporal distribution of the reproductive potential of the female squat lobster (Pleuroncodes monodon) stock in central and southern Chile
title_fullStr Spatiotemporal distribution of the reproductive potential of the female squat lobster (Pleuroncodes monodon) stock in central and southern Chile
title_full_unstemmed Spatiotemporal distribution of the reproductive potential of the female squat lobster (Pleuroncodes monodon) stock in central and southern Chile
title_sort spatiotemporal distribution of the reproductive potential of the female squat lobster (pleuroncodes monodon) stock in central and southern chile
description Pleuroncodes monodon is 1 of the 3 species sustaining the demersal crustacean fisheries in Chile, with landings that have had strong variations and a very slow recovery in the past decade. The southern fishing unit has been in the recovery status since 2017, following several years of intense overfishing, which affected the reproductive potential and the geographical distribution of the stock. In this study, fishing haul information from 14 direct evaluation surveys of P. monodon were used to estimate, by using geostatistics, the density of the reproductive potential of the female stock in central and southern Chile (32.0° S to 37.0° S) from 2005 to 2018. The annual mean potential eggs was estimated at 78,055.0 million potential eggs, with a mean density of 74.0 million eggs per square kilometer. Two areas of aggregation of the reproductive potential are recognized, one between 33.5° S and 34.5° S (northern zone) and the other between 35.5° S and 36.5° S (southern zone). The mean density of potential eggs was higher in the northern zone than in the southern zone, although in the southern zone there were foci with values close to 100 million eggs per square kilometer, which was not the case for the northern zone. The P. monodon population comes from a single breeding area located in the southern zone. In the 2008–2012 period, the female stock showed a net migration of 226.4 km northward (from 36°20ʹ52.5ʺ S to 34°18ʹ39.1ʺ S), although it was later reduced southward by the fishing pressure.
publisher Iniversidad Autónoma de Baja California
publishDate 2023
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3321
_version_ 1792095481820610560
spelling oai:cienciasmarinas.com.mx:article-33212024-02-08T22:54:21Z Spatiotemporal distribution of the reproductive potential of the female squat lobster (Pleuroncodes monodon) stock in central and southern Chile Distribución espaciotemporal del potencial reproductivo del stock de hembras de langostino colorado (Pleuroncodes monodon) en la zona centro-sur de Chile Barros, Mónica E Alarcón, Rubén Arancibia, Hugo Pleuroncodes monodon potential egg density geostatistical analysis central and southern Chile Pleuroncodes monodon densidad potencial de huevos geoestadística zona centro-sur de Chile Pleuroncodes monodon is 1 of the 3 species sustaining the demersal crustacean fisheries in Chile, with landings that have had strong variations and a very slow recovery in the past decade. The southern fishing unit has been in the recovery status since 2017, following several years of intense overfishing, which affected the reproductive potential and the geographical distribution of the stock. In this study, fishing haul information from 14 direct evaluation surveys of P. monodon were used to estimate, by using geostatistics, the density of the reproductive potential of the female stock in central and southern Chile (32.0° S to 37.0° S) from 2005 to 2018. The annual mean potential eggs was estimated at 78,055.0 million potential eggs, with a mean density of 74.0 million eggs per square kilometer. Two areas of aggregation of the reproductive potential are recognized, one between 33.5° S and 34.5° S (northern zone) and the other between 35.5° S and 36.5° S (southern zone). The mean density of potential eggs was higher in the northern zone than in the southern zone, although in the southern zone there were foci with values close to 100 million eggs per square kilometer, which was not the case for the northern zone. The P. monodon population comes from a single breeding area located in the southern zone. In the 2008–2012 period, the female stock showed a net migration of 226.4 km northward (from 36°20ʹ52.5ʺ S to 34°18ʹ39.1ʺ S), although it was later reduced southward by the fishing pressure. Pleuroncodes monodon es 1 de las 3 especies que sustentan las pesquerías demersales de crustáceos en Chile, con niveles de desembarque que han mostrado amplias variaciones y una muy lenta recuperación en la última década. La unidad de pesquería sur se encuentra en estado de recuperación desde 2017, después de una intensa sobrepesca, la que afectó tanto al potencial reproductivo como a la distribución geográfica del stock. En el presente estudio, se usó información de lances de pesca de 14 campañas de evaluación directa de P. monodon para estimar la densidad del potencial reproductivo del stock de hembras en el periodo 2005-2018 en la zona centro-sur (32.0° S a 37.0° S) de Chile mediante un análisis geoestadístico. El promedio anual de huevos potenciales se estimó en 78,055.0 millones de huevos potenciales, con una densidad promedio de 74.0 millones de huevos por kilómetro cuadrado. Se reconocieron 2 zonas de agregación del potencial reproductivo, una entre 33.5° S y 34.5° S (zona norte) y otra entre 35.5° S y 36.5° S (zona sur). La densidad promedio de huevos potenciales fue mayor en la zona norte que en la zona sur, aunque en la zona sur se localizaron focos con máximos cercanos a 100 millones de huevos por kilómetro cuadrado, lo que no ocurrió en la zona norte. La población de P. monodon proviene de una sola área de cría, ubicada en la zona sur. En el periodo de 2008 a 2012, el stock de hembras presentó una migración neta con rumbo norte de casi 226.4 km (desde 36°20ʹ52.5ʺ S hasta 34°18ʹ39.1ʺ S), aunque posteriormente se redujo con rumbo norte-sur por la presión pesquera. Iniversidad Autónoma de Baja California 2023-06-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf text/xml text/xml https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3321 10.7773/cm.y2023.3321 Ciencias Marinas; Vol. 49 (2023) Ciencias Marinas; Vol. 49 (2023) 2395-9053 0185-3880 eng spa https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3321/420420740 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3321/420420855 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3321/420420857 Copyright (c) 2023 Mónica E Barros, Rubén Alarcón, Hugo Arancibia https://creativecommons.org/licenses/by/4.0

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