Kadri H., Marouani S., Bradai M. N., Bouain A., Morize Eric. (2014). Age, growth, mortality, longevity and reproductive biology of the white skate, Rostroraja alba (Chondrichthyes : Rajidae) of the Gulf of Gabes (Southern Tunisia, Central Mediterranean). Turkish Journal of Fisheries and Aquatic Sciences, 14 (1), p. 193-204. ISSN 1303-2712.
Titre du document
Age, growth, mortality, longevity and reproductive biology of the white skate, Rostroraja alba (Chondrichthyes : Rajidae) of the Gulf of Gabes (Southern Tunisia, Central Mediterranean)
Année de publication
2014
Auteurs
Kadri H., Marouani S., Bradai M. N., Bouain A., Morize Eric
Source
Turkish Journal of Fisheries and Aquatic Sciences, 2014,
14 (1), p. 193-204 ISSN 1303-2712
The Age, growth, mortality, longevity and reproductive parameters were studied for Rostroraja alba from the Gulf of Gabes (Southern Tunisia, central Mediterranean Sea), collected monthly during 2007 from commercial fisheries. 43.75% of the composition was females and 56.25% males. A total of 140 females (44.5 - 160 cm TL) and 180 males (39.5 - 150 cm TL) were examined to study the reproductive cycle. A subsample of 115 specimens (65 females and 50 males, ranging from 39.5 to 160 cm TL) was used for age and growth estimation derived from vertebral centra. The oldest female was 35 years and 160 cm TL, whereas the oldest male was 32 years and 150 cm TL. The von Bertalanffy growth parameters were L infinity= 177.6 +/- 3.61 cm, k= 0.06 +/- 3.08 year(-1) and t(0)= -1.28 +/- 1.97 10(-1) year for females and L infinity= 199.6 +/- 3.66 cm, k= 0.04 +/- 1.9610(-3) year(-1) and t(0)= -1.47 +/- 0.35 10(-1) year for males. Growth was not significantly different between sexes. The maturity size (TL 50%) was 119.3 cm (94.20 cm DW) for males and 129.4 cm (95.77 cm DW) for females. The maturity age (A50%) was estimated to 19.69 and 23.47 years respectively for males and females. Size and age maturity were not significantly different between sexes.
Plan de classement
Limnologie biologique / Océanographie biologique [034]
;
Ressources halieutiques [040]
Description Géographique
MEDITERRANEE ; TUNISIE ; GABES GOLFE
Localisation
Fonds IRD [F B010062234]
Identifiant IRD
fdi:010062234
