Study of the growth of Octopus vulgaris in the Moroccan Mediterranean Sea by direct age estimation through the analysis of upper beaks
Abstract Beaks are one of the most important sclerochronological structures used to study the age and growth of cephalopods, in particular Octopus vulgaris Cuvier, 1797. The present study provides results of ageing of 128 O. vulgaris (56–239 mm dorsal mantle length, DML; 121–5974 g total weight, TW)...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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2023
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Online Access: | http://dx.doi.org/10.1017/s0025315423000218 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315423000218 |
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crcambridgeupr:10.1017/s0025315423000218 2024-03-03T08:43:54+00:00 Study of the growth of Octopus vulgaris in the Moroccan Mediterranean Sea by direct age estimation through the analysis of upper beaks Faiki, Ahmed Chairi, Hicham Malouli Idrissi, Mohammed Bensbai, Jilali 2023 http://dx.doi.org/10.1017/s0025315423000218 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315423000218 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 103 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 2023 crcambridgeupr https://doi.org/10.1017/s0025315423000218 2024-02-08T08:47:22Z Abstract Beaks are one of the most important sclerochronological structures used to study the age and growth of cephalopods, in particular Octopus vulgaris Cuvier, 1797. The present study provides results of ageing of 128 O. vulgaris (56–239 mm dorsal mantle length, DML; 121–5974 g total weight, TW) collected in the southern Moroccan Mediterranean coasts between Fnideq and Jebha. The number of increments corresponding to the age (days since hatching) varied from 137–368 in females and from 129–382 in males. There was a significant correlation between beak and somatic growth. The correlation coefficients of the growth curves DML-Age and TW-Age were similar for both power and exponential models: DML = 0.185Age 1.188 ( R 2 = 0.547), DML = 35.933e 0.005Age ( R 2 = 0.546), TW = 0.00002Age 3.260 ( R 2 = 0.532), TW = 29.56e 0.014Age ( R 2 = 0.541). The average width of the increments was similar between females and males. It varied significantly with season and stage of sexual maturity. Comparison of the growth curve with those estimated by other authors showed that Moroccan Mediterranean O. vulgaris grew faster than that of Sardinia (Italy) and slower than that of the Mauritanian coast. Article in Journal/Newspaper DML Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 103 |
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Cambridge University Press |
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English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Faiki, Ahmed Chairi, Hicham Malouli Idrissi, Mohammed Bensbai, Jilali Study of the growth of Octopus vulgaris in the Moroccan Mediterranean Sea by direct age estimation through the analysis of upper beaks |
topic_facet |
Aquatic Science |
description |
Abstract Beaks are one of the most important sclerochronological structures used to study the age and growth of cephalopods, in particular Octopus vulgaris Cuvier, 1797. The present study provides results of ageing of 128 O. vulgaris (56–239 mm dorsal mantle length, DML; 121–5974 g total weight, TW) collected in the southern Moroccan Mediterranean coasts between Fnideq and Jebha. The number of increments corresponding to the age (days since hatching) varied from 137–368 in females and from 129–382 in males. There was a significant correlation between beak and somatic growth. The correlation coefficients of the growth curves DML-Age and TW-Age were similar for both power and exponential models: DML = 0.185Age 1.188 ( R 2 = 0.547), DML = 35.933e 0.005Age ( R 2 = 0.546), TW = 0.00002Age 3.260 ( R 2 = 0.532), TW = 29.56e 0.014Age ( R 2 = 0.541). The average width of the increments was similar between females and males. It varied significantly with season and stage of sexual maturity. Comparison of the growth curve with those estimated by other authors showed that Moroccan Mediterranean O. vulgaris grew faster than that of Sardinia (Italy) and slower than that of the Mauritanian coast. |
format |
Article in Journal/Newspaper |
author |
Faiki, Ahmed Chairi, Hicham Malouli Idrissi, Mohammed Bensbai, Jilali |
author_facet |
Faiki, Ahmed Chairi, Hicham Malouli Idrissi, Mohammed Bensbai, Jilali |
author_sort |
Faiki, Ahmed |
title |
Study of the growth of Octopus vulgaris in the Moroccan Mediterranean Sea by direct age estimation through the analysis of upper beaks |
title_short |
Study of the growth of Octopus vulgaris in the Moroccan Mediterranean Sea by direct age estimation through the analysis of upper beaks |
title_full |
Study of the growth of Octopus vulgaris in the Moroccan Mediterranean Sea by direct age estimation through the analysis of upper beaks |
title_fullStr |
Study of the growth of Octopus vulgaris in the Moroccan Mediterranean Sea by direct age estimation through the analysis of upper beaks |
title_full_unstemmed |
Study of the growth of Octopus vulgaris in the Moroccan Mediterranean Sea by direct age estimation through the analysis of upper beaks |
title_sort |
study of the growth of octopus vulgaris in the moroccan mediterranean sea by direct age estimation through the analysis of upper beaks |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/s0025315423000218 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315423000218 |
genre |
DML |
genre_facet |
DML |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 103 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315423000218 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
103 |
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1792499355128692736 |