Morphological variability in Illex coindetii (Cephalopoda: Ommastrephidae) along the north-west coast of Africa
This paper gives morphometric variations and dorsal mantle length-total weight (DML-TW) relationships for Illex coindetii in the eastern Central Atlantic area. Positive allometry was observed in males and negative in females of the species. The most variable body measurements between males and femal...
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Language: | English |
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Online Access: | http://hdl.handle.net/10553/49441 https://doi.org/10.1017/S0025315400044477 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/49441 2023-05-15T16:01:42+02:00 Morphological variability in Illex coindetii (Cephalopoda: Ommastrephidae) along the north-west coast of Africa Hernández-García, V. Castro, J. J. 6603374505 7403068298 1998 http://hdl.handle.net/10553/49441 https://doi.org/10.1017/S0025315400044477 eng eng 0025-3154 Journal of the Marine Biological Association of the United Kingdom 0025-3154 http://hdl.handle.net/10553/49441 doi:10.1017/S0025315400044477 0032412589 1268 1259 78 Journal of the Marine Biological Association of the United Kingdom [ISSN 0025-3154], v. 78, p. 1259-1268 240119 Zoología marina Illex coindetii info:eu-repo/semantics/article Article 1998 ftunivlaspalmas https://doi.org/10.1017/S0025315400044477 2020-02-19T00:08:01Z This paper gives morphometric variations and dorsal mantle length-total weight (DML-TW) relationships for Illex coindetii in the eastern Central Atlantic area. Positive allometry was observed in males and negative in females of the species. The most variable body measurements between males and females were width and perimeter of the head. In the study area, divergence of morphometric measurement starts at 95 mm. The point of divergence, however, varies with latitude; fluctuating from 104 mm in the north (Morocco and Sahara) to 76 mm in the central area (Mauritania and north of Senegal) and 73 mm in the south (Gulf of Guinea). The relationships between DML and TW showed that sexual dimorphism due to differential growth between males and females starts to occur at 56 mm ML. The starting point of sexual dimorphism (56 mm) varies according to the zone; the higher the latitude, the later it occurs. Thus, sexual dimorphism occurs at 49 mm in the south (Gulf of Guinea), at 54 mm in the central area (Mauritania and north of Senegal) and at 74 mm in the north (Morocco and Sahara). Females grow larger than males, but males were heavier at any given length. As latitude decreased, a slow down in the increase in weight-at-length was observed in both sexes. Article in Journal/Newspaper DML Universidad de Las Palmas de Gran Canaria: Acceda Journal of the Marine Biological Association of the United Kingdom 78 4 1259 1268 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
240119 Zoología marina Illex coindetii |
spellingShingle |
240119 Zoología marina Illex coindetii Hernández-García, V. Castro, J. J. Morphological variability in Illex coindetii (Cephalopoda: Ommastrephidae) along the north-west coast of Africa |
topic_facet |
240119 Zoología marina Illex coindetii |
description |
This paper gives morphometric variations and dorsal mantle length-total weight (DML-TW) relationships for Illex coindetii in the eastern Central Atlantic area. Positive allometry was observed in males and negative in females of the species. The most variable body measurements between males and females were width and perimeter of the head. In the study area, divergence of morphometric measurement starts at 95 mm. The point of divergence, however, varies with latitude; fluctuating from 104 mm in the north (Morocco and Sahara) to 76 mm in the central area (Mauritania and north of Senegal) and 73 mm in the south (Gulf of Guinea). The relationships between DML and TW showed that sexual dimorphism due to differential growth between males and females starts to occur at 56 mm ML. The starting point of sexual dimorphism (56 mm) varies according to the zone; the higher the latitude, the later it occurs. Thus, sexual dimorphism occurs at 49 mm in the south (Gulf of Guinea), at 54 mm in the central area (Mauritania and north of Senegal) and at 74 mm in the north (Morocco and Sahara). Females grow larger than males, but males were heavier at any given length. As latitude decreased, a slow down in the increase in weight-at-length was observed in both sexes. |
author2 |
6603374505 7403068298 |
format |
Article in Journal/Newspaper |
author |
Hernández-García, V. Castro, J. J. |
author_facet |
Hernández-García, V. Castro, J. J. |
author_sort |
Hernández-García, V. |
title |
Morphological variability in Illex coindetii (Cephalopoda: Ommastrephidae) along the north-west coast of Africa |
title_short |
Morphological variability in Illex coindetii (Cephalopoda: Ommastrephidae) along the north-west coast of Africa |
title_full |
Morphological variability in Illex coindetii (Cephalopoda: Ommastrephidae) along the north-west coast of Africa |
title_fullStr |
Morphological variability in Illex coindetii (Cephalopoda: Ommastrephidae) along the north-west coast of Africa |
title_full_unstemmed |
Morphological variability in Illex coindetii (Cephalopoda: Ommastrephidae) along the north-west coast of Africa |
title_sort |
morphological variability in illex coindetii (cephalopoda: ommastrephidae) along the north-west coast of africa |
publisher |
0025-3154 |
publishDate |
1998 |
url |
http://hdl.handle.net/10553/49441 https://doi.org/10.1017/S0025315400044477 |
genre |
DML |
genre_facet |
DML |
op_source |
Journal of the Marine Biological Association of the United Kingdom [ISSN 0025-3154], v. 78, p. 1259-1268 |
op_relation |
Journal of the Marine Biological Association of the United Kingdom 0025-3154 http://hdl.handle.net/10553/49441 doi:10.1017/S0025315400044477 0032412589 1268 1259 78 |
op_doi |
https://doi.org/10.1017/S0025315400044477 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
78 |
container_issue |
4 |
container_start_page |
1259 |
op_container_end_page |
1268 |
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1766397461459369984 |