Observations on the distribution, population structure and biology of Bathypterois mediterraneus Bauchot, 1962 in three areas of the Mediterranean Sea
During the DESEAS cruise Bathypterois mediterraneus specimens were sampled in the Balearic Sea between 1000 and 2800 m as well as in the western and eastern Ionian Sea from 800 to 3300 m and from 800 to 2600 m respectively. The species was found to be more abundant at depths of 1500-2000 m. The size...
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Consejo Superior de Investigaciones Científicas
2004-12-01
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doaj-d2840f8faa404eac9310d028639743f32021-05-05T13:49:45ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342004-12-0168S316317010.3989/scimar.2004.68s3163438Observations on the distribution, population structure and biology of Bathypterois mediterraneus Bauchot, 1962 in three areas of the Mediterranean SeaGianfranco d'Onghia0Domingo Lloris1Letizia Sion2Francesca Capezzuto3Mary Labropoulou41Dipartimento di Zoologia, Università degli StudiInstitut de Ciències del Mar (CSIC).1Dipartimento di Zoologia, Università degli Studi1Dipartimento di Zoologia, Università degli StudiInstitute of Marine Biological Resources, Hellenic Centre for Marine ResearchDuring the DESEAS cruise Bathypterois mediterraneus specimens were sampled in the Balearic Sea between 1000 and 2800 m as well as in the western and eastern Ionian Sea from 800 to 3300 m and from 800 to 2600 m respectively. The species was found to be more abundant at depths of 1500-2000 m. The size-range was 26-190 mm and the most abundant size class was around 100-120 mm standard length. No significant size-depth trends were shown for either length or weight. Negative allometry was shown in the growth of fishes and otoliths and in the relationship between fish length and otolith size in the samples from the western and eastern Ionian Sea. In these two areas the absolute growth was estimated by adopting the Von Bertalanffy function (western Ionian: SL∞ = 194.3 ± 38.51 mm, k = 0.146 ± 0.061/year, t0 = - 0.921 ± 0.699, ø' = 3.74; eastern Ionian: SL∞ = 180.23 ± 63.36 mm, k = 0.150 ± 0.112/year, t0 = - 0.968 ± 0.868, ø' = 3.70). Although most of the specimens were immature, some ripe gonads were recorded in individuals greater than 104 mm in standard length, confirming the simultaneous hermaphroditism in this fish. The results are discussed in relation to previous observations on the life strategy of B.mediterraneus in the Mediterranean Sea.http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/442bathypterois mediterraneusdistributionpopulation structuregrowthreproductionmediterranean sea |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gianfranco d'Onghia Domingo Lloris Letizia Sion Francesca Capezzuto Mary Labropoulou |
spellingShingle |
Gianfranco d'Onghia Domingo Lloris Letizia Sion Francesca Capezzuto Mary Labropoulou Observations on the distribution, population structure and biology of Bathypterois mediterraneus Bauchot, 1962 in three areas of the Mediterranean Sea Scientia Marina bathypterois mediterraneus distribution population structure growth reproduction mediterranean sea |
author_facet |
Gianfranco d'Onghia Domingo Lloris Letizia Sion Francesca Capezzuto Mary Labropoulou |
author_sort |
Gianfranco d'Onghia |
title |
Observations on the distribution, population structure and biology of Bathypterois mediterraneus Bauchot, 1962 in three areas of the Mediterranean Sea |
title_short |
Observations on the distribution, population structure and biology of Bathypterois mediterraneus Bauchot, 1962 in three areas of the Mediterranean Sea |
title_full |
Observations on the distribution, population structure and biology of Bathypterois mediterraneus Bauchot, 1962 in three areas of the Mediterranean Sea |
title_fullStr |
Observations on the distribution, population structure and biology of Bathypterois mediterraneus Bauchot, 1962 in three areas of the Mediterranean Sea |
title_full_unstemmed |
Observations on the distribution, population structure and biology of Bathypterois mediterraneus Bauchot, 1962 in three areas of the Mediterranean Sea |
title_sort |
observations on the distribution, population structure and biology of bathypterois mediterraneus bauchot, 1962 in three areas of the mediterranean sea |
publisher |
Consejo Superior de Investigaciones Científicas |
series |
Scientia Marina |
issn |
0214-8358 1886-8134 |
publishDate |
2004-12-01 |
description |
During the DESEAS cruise Bathypterois mediterraneus specimens were sampled in the Balearic Sea between 1000 and 2800 m as well as in the western and eastern Ionian Sea from 800 to 3300 m and from 800 to 2600 m respectively. The species was found to be more abundant at depths of 1500-2000 m. The size-range was 26-190 mm and the most abundant size class was around 100-120 mm standard length. No significant size-depth trends were shown for either length or weight. Negative allometry was shown in the growth of fishes and otoliths and in the relationship between fish length and otolith size in the samples from the western and eastern Ionian Sea. In these two areas the absolute growth was estimated by adopting the Von Bertalanffy function (western Ionian: SL∞ = 194.3 ± 38.51 mm, k = 0.146 ± 0.061/year, t0 = - 0.921 ± 0.699, ø' = 3.74; eastern Ionian: SL∞ = 180.23 ± 63.36 mm, k = 0.150 ± 0.112/year, t0 = - 0.968 ± 0.868, ø' = 3.70). Although most of the specimens were immature, some ripe gonads were recorded in individuals greater than 104 mm in standard length, confirming the simultaneous hermaphroditism in this fish. The results are discussed in relation to previous observations on the life strategy of B.mediterraneus in the Mediterranean Sea. |
topic |
bathypterois mediterraneus distribution population structure growth reproduction mediterranean sea |
url |
http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/442 |
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