Comparison of the catches of European hake (Merluccius merluccius, L. 1758) taken with experimental gillnets of different mesh sizes in the northern Tyrrhenian Sea (western Mediterranean)
The impact of the gillnet fishery on Merluccius merluccius (European hake) was investigated in the northern Tyrrhenian Sea, western Mediterranean. Four mesh sizes were tested: 53, 62.5, 70 and 82 mm. Horse mackerel (Trachurus trachurus), hake and tub gurnard (Chelidonichthys lucerna) dominated the...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2007-03-01
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| Series: | Scientia Marina |
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| Online Access: | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/26 |
| _version_ | 1819297173478572032 |
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| author | Mario Sbrana Paola Belcari Stefano de Ranieri Paolo Sartor Claudio Viva |
| author_facet | Mario Sbrana Paola Belcari Stefano de Ranieri Paolo Sartor Claudio Viva |
| author_sort | Mario Sbrana |
| collection | DOAJ |
| description | The impact of the gillnet fishery on Merluccius merluccius (European hake) was investigated in the northern Tyrrhenian Sea, western Mediterranean. Four mesh sizes were tested: 53, 62.5, 70 and 82 mm. Horse mackerel (Trachurus trachurus), hake and tub gurnard (Chelidonichthys lucerna) dominated the catches, from a minimum of 89% (82 mm mesh) to a maximum of 97.8% (70 mm) of the biomass caught. Efficiency of the four meshes was not significantly different with respect to the total hake catches. Selectivity on M. merluccius was assessed by Sechin and SELECT methods. Tangling was an important catch modality for hake, as evidenced by the results of the Sechin model which described only the first mode of the size distributions corresponding to the entangled specimens. SELECT showed that the bi-modal function gave the best adjustment to the length-frequency distributions; the modal catch sizes were 33, 39.2, 43.6 and 51 cm total length respectively for the 53, 62.5, 70 and 82 mm mesh sizes. Taking into account the size of first maturity for females (35.1 cm TL), 62.5 mm is the most adequate mesh for exploiting hake as it gives some protection to both immature specimens and large females. |
| first_indexed | 2024-12-24T05:09:48Z |
| format | Article |
| id | doaj.art-e0714dac82e147119898b9a7d6b38dc2 |
| institution | Directory Open Access Journal |
| issn | 0214-8358 1886-8134 |
| language | English |
| last_indexed | 2024-12-24T05:09:48Z |
| publishDate | 2007-03-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Scientia Marina |
| spelling | doaj.art-e0714dac82e147119898b9a7d6b38dc22022-12-21T17:13:44ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342007-03-01711475610.3989/scimar.2007.71n14726Comparison of the catches of European hake (Merluccius merluccius, L. 1758) taken with experimental gillnets of different mesh sizes in the northern Tyrrhenian Sea (western Mediterranean)Mario Sbrana0Paola Belcari1Stefano de Ranieri2Paolo Sartor3Claudio Viva4Centro Interuniversitario di Biologia Marina ed Ecologia Applicata, LivornoDipartimento di Scienze dell’Uomo e dell’Ambiente, PrisaCentro Interuniversitario di Biologia Marina ed Ecologia Applicata, LivornoCentro Interuniversitario di Biologia Marina ed Ecologia Applicata, LivornoDipartimento di Scienze dell’Uomo e dell’Ambiente, PrisaThe impact of the gillnet fishery on Merluccius merluccius (European hake) was investigated in the northern Tyrrhenian Sea, western Mediterranean. Four mesh sizes were tested: 53, 62.5, 70 and 82 mm. Horse mackerel (Trachurus trachurus), hake and tub gurnard (Chelidonichthys lucerna) dominated the catches, from a minimum of 89% (82 mm mesh) to a maximum of 97.8% (70 mm) of the biomass caught. Efficiency of the four meshes was not significantly different with respect to the total hake catches. Selectivity on M. merluccius was assessed by Sechin and SELECT methods. Tangling was an important catch modality for hake, as evidenced by the results of the Sechin model which described only the first mode of the size distributions corresponding to the entangled specimens. SELECT showed that the bi-modal function gave the best adjustment to the length-frequency distributions; the modal catch sizes were 33, 39.2, 43.6 and 51 cm total length respectively for the 53, 62.5, 70 and 82 mm mesh sizes. Taking into account the size of first maturity for females (35.1 cm TL), 62.5 mm is the most adequate mesh for exploiting hake as it gives some protection to both immature specimens and large females.http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/26european hakegillnetselectivitysechin methodselect methodwestern mediterraneanartisanal fishery |
| spellingShingle | Mario Sbrana Paola Belcari Stefano de Ranieri Paolo Sartor Claudio Viva Comparison of the catches of European hake (Merluccius merluccius, L. 1758) taken with experimental gillnets of different mesh sizes in the northern Tyrrhenian Sea (western Mediterranean) Scientia Marina european hake gillnet selectivity sechin method select method western mediterranean artisanal fishery |
| title | Comparison of the catches of European hake (Merluccius merluccius, L. 1758) taken with experimental gillnets of different mesh sizes in the northern Tyrrhenian Sea (western Mediterranean) |
| title_full | Comparison of the catches of European hake (Merluccius merluccius, L. 1758) taken with experimental gillnets of different mesh sizes in the northern Tyrrhenian Sea (western Mediterranean) |
| title_fullStr | Comparison of the catches of European hake (Merluccius merluccius, L. 1758) taken with experimental gillnets of different mesh sizes in the northern Tyrrhenian Sea (western Mediterranean) |
| title_full_unstemmed | Comparison of the catches of European hake (Merluccius merluccius, L. 1758) taken with experimental gillnets of different mesh sizes in the northern Tyrrhenian Sea (western Mediterranean) |
| title_short | Comparison of the catches of European hake (Merluccius merluccius, L. 1758) taken with experimental gillnets of different mesh sizes in the northern Tyrrhenian Sea (western Mediterranean) |
| title_sort | comparison of the catches of european hake merluccius merluccius l 1758 taken with experimental gillnets of different mesh sizes in the northern tyrrhenian sea western mediterranean |
| topic | european hake gillnet selectivity sechin method select method western mediterranean artisanal fishery |
| url | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/26 |
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