Age, growth, sexual maturity and reproduction of the thornback ray,<i>Raja clavata</i>(L.), of the Gulf of Gabès (south-central Mediterranean Sea)

Kadri, Hasna; Marouani, Sondes; Saïdi, Béchir; Bradaï, Mohamed Nejmeddine; Bouaïn, Abderrahmen; Morize, Eric

doi:10.1080/17451000.2013.797584

Cited by 29 publications

(23 citation statements)

References 32 publications

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“…Continuous spawning was also reported for other rajid species such as eyespot skate, Atlantoraja cyclophora (Regan, 1903) (Oddone and Vooren, 2005), and spotted ray, Raja montagui Fowler, 1910 (Walker, 1999). Contrary to the aforementioned results, thornback ray did not report as a continuous spawner in the north (Matosinhos) and the center (Peniche) of Portugal (Serra-Pereira et al, 2011) and in the Gulf of Gabès (south-central Mediterranean) (Kadri et al, 2014). Although there is an evidence that the duration of the spawning period may vary both annually and geographically, it was suggested that length of daylight is the main factor controlling the ovarian cycle and that temperature controls the rate of egg laying (Holden, 1975).…”

Section: Spawning Periodmentioning

confidence: 71%

“…are key population input parameters in the assessment and management of exploited and/or unexploited fish stocks (Tsikliras et al, 2010;Tsikliras and Stergiou, 2014). These reproduction biology parameters of thornback ray were previously reported from different geographic regions such as British water (Steven, 1934;Ryland and Ajayi, 1984;McCully et al, 2012), Irish sea (Nottage and Perkins, 1983;Gallagher et al, 2005;Whittamore and McCarthy, 2005), Adriatic sea (KrstulovićŠifner et al, 2009;Jardas, 1973), Portuguese coast of Atlantic (Serra-Pereira et al, 2011), Mediterranean Sea of Tunisia and France coast (Kadri et al, 2014;Capapé et al, 2007). Moreover, previous research into thornback ray reproduction has been rather fragmentary in the Black Sea.…”

Section: Introductionmentioning

confidence: 75%

“…Holden et al (1971) demonstrated that the rate and peaks of egg deposition in different ray species such as thornback ray, blonde ray (Raja brachyura Lafont, 1871), and spotted ray were dependent on water temperature fluctuations. As can be seen from the above explanations, the spawning period of thornback ray may vary according to the region and years in the Mediterranean Sea (Capapé et al 2007;Kadri et al, 2014), but this event has not yet been proven for the stock of the Black Sea and the North Sea.…”

Section: Spawning Periodmentioning

confidence: 99%

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Karadeniz’de Vatoz Balığının, Raja clavata (Linnaeus, 1758) (Elasmobranchii: Rajidae) Üreme Zamanı ve Cinsi Olgunluk Boyu

Bilgin

Onay

2020

Acta Aquatica Turcica

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To describe the spawning period, size at maturity (L m), reproductive load (L m /L max), length at maximum yield per recruit (L opt) of thornback ray (Raja clavata); and to assess the differences in these parameters from other populations, a total of 18 months samplings were conducted between February 2011 and December 2013 in the southeast Black Sea. A total of 265 (160 females and 105 males) specimens of thornback ray were examined. The mean total length (L) of females was significantly greater than the mean total length of males (p<0.05). The GSI analysis revealed that thornback ray showed reproductive activities throughout the year. The L m was estimated as 75.44 cm for females and 71.71 cm for males. The L opt was estimated from the empirical relationships between the L opt and L m , and it was larger than L m for both sexes.

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Section: Spawning Periodmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 75%

Section: Spawning Periodmentioning

confidence: 99%

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Karadeniz’de Vatoz Balığının, Raja clavata (Linnaeus, 1758) (Elasmobranchii: Rajidae) Üreme Zamanı ve Cinsi Olgunluk Boyu

Bilgin

Onay

2020

Acta Aquatica Turcica

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“…D. oxyrinchus, Yigin & Ismen, 2010;R. clavata, Serra-Pereira et al, 2005b;Kadri et al, 2014; the brown skate Raja miraletus L., 1758, Kadri et al, 2012). According to Branstetter (1987), k values between 0.05 and 0.10 y -1 are typical of slow growing species, 0.10-0.20 y -1 of moderate growth animals and 0.20 -0.50 y -1 of rapid growing species.…”

Section: Discussionmentioning

confidence: 99%

Life-history traits of a commercial ray, Raja brachyura from the central western Mediterranean Sea

Porcu

Bellodi

Cannas³

et al. 2014

Medit. Mar. Sci.

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In the present study the life history traits of Raja brachyura from Sardinian waters (central-western Mediterranean) were investigated and the results compared with previously published data. The age, growth and reproduction were studied using 1792 specimens. Females ranged from 13.1 to 105.5 cm in total length (TL) and males from 18 to 96.5 cm TL. This species was sexually dimorphic, with females attaining a larger size than males. Both females and males showed positive allometric growth, and significant differences in the relationship between length and weight among sexes were found. The von Bertalanffy growth function (3 parameters), which provided the following values: L ∞ =111.14 cm TL, k=0.10 and t 0 =-1.3 for females, and L ∞ =108.81 cm TL, k=0.11 and t 0 =-1.2 for males, was the best-fit age model. R. brachyura showed a relatively slow growth rate with males growing slightly more rapidly than females. Length and age at maturity were 87.2 cm (14 years) for females and 80.8 cm (10 years) for males corresponding to 83 and 83.7% of maximum observed length respectively, indicating that the blonde ray is particularly sensitive to fishing pressure. This ray exhibited a restricted reproductive cycle from late May to August, as confirmed by the GSI values. Ovarian fecundity reached a maximum of 44 yolked follicles. Given the relative abundance in Sardinian seas, it is hoped that these results will prove useful for the implementation of basic management measures in order to ensure the sustainability of catches of this species in the Mediterranean Sea.

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“…[77]), maximum-recorded TL is 110 cm (in Ref. [87]). Thornback ray feeds mainly on teleosts, crustaceans and cephalopods, whereas gastropods and polychaetes are occasionally consumed (in Ref.…”

Section: Thornback Ray-raja Clavata Linneo 1758mentioning

confidence: 99%

A Tale on the Demersal and Bottom Dwelling Chondrichthyes in the South of Sicily through 20 Years of Scientific Survey

Geraci¹,

Ragonese²,

Norrito³

et al. 2017

Chondrichthyes - Multidisciplinary Approach

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In the present work, an overview of the demersal (sharks-chimaera) and bottom dwelling . Results suggest that most of the Chondrichthyes in South of Sicily are in a steady state, although in the last few years, they seemed to recover. The spatial distribution of sharks-chimaera in the geographical sub-area (GSA) 16 is mainly concentrated in the southern and north-western zones. Nevertheless, possible management actions to promote the recovering of these very important ecological and threatened species are discussed.

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Age, growth, sexual maturity and reproduction of the thornback ray,Raja clavata(L.), of the Gulf of Gabès (south-central Mediterranean Sea)

Cited by 29 publications

References 32 publications

Karadeniz’de Vatoz Balığının, Raja clavata (Linnaeus, 1758) (Elasmobranchii: Rajidae) Üreme Zamanı ve Cinsi Olgunluk Boyu

Karadeniz’de Vatoz Balığının, Raja clavata (Linnaeus, 1758) (Elasmobranchii: Rajidae) Üreme Zamanı ve Cinsi Olgunluk Boyu

Life-history traits of a commercial ray, Raja brachyura from the central western Mediterranean Sea

A Tale on the Demersal and Bottom Dwelling Chondrichthyes in the South of Sicily through 20 Years of Scientific Survey

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