Size at maturity of triglid fishes in the Adriatic Sea, northeastern Mediterranean

Vallisneri, Maria; Montanini, Stefano; Stagioni, Marco

doi:10.1111/j.1439-0426.2011.01777.x

Cited by 14 publications

(26 citation statements)

References 7 publications

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“…As for the size at maturity, our data are comparable to those reported in the literature being related to the latitude (Vallisneri et al 2012). The differences can be attributed to environmental changes (particularly temperature that stimulate sexual maturation), such as the photoperiod and prey availability, in addition to internal physiological factors.…”

Section: Tl [Mm]supporting

confidence: 90%

“…ICES has identified red gurnard as a new MoU (Memorandum of understanding) species and has recommended that a survey on its biological data should be conducted in order to define stock characteristics and assist in the development of management strategies for sustainable exploitation (Marriott et al 2010, Anonymous 2006, 2012.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the missing parts of the time-series data of red gurnard it is difficult to provide a preliminary analytical assessment (Anonymous 2012). Its biology is poorly understood in the Atlantic Ocean (Marriott et al 2010), and in the northern Mediterranean Sea (Colloca et al 2003, Vallisneri et al 2010, 2012. A number of researchers studied the growth of this fish (Baron 1985a, Maisan et al 1998, Colloca et al 2003, its length-weight relations (Coull et al 1989, Mendes et al 2004, Olim and Borges 2004, reproduction (Baron 1985b), and the diet (Moreno-Amich 1992, Colloca et al 1994, Terrats et al 2000.…”

Section: Introductionmentioning

confidence: 99%

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Distribution and some biological parameters of the red gurnard, Chelidonichthys cuculus (Actinopterygii, Scorpaeniformes, Triglidae) in the north-central Adriatic Sea

Vallisneri¹,

Tommasini²,

Stagioni³

et al. 2014

Acta Ichthyol. Piscat

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Vallisneri M., Tommasini S., Stagioni M., Manfredi C., Isajlović I., Montanini S. 2014. Distribution and some biological parameters of the red gurnard, Chelidonichthys cuculus (Actinopterygii, Scorpaeniformes, Triglidae) in the north-central Adriatic Sea. Acta Ichthyol. Piscat. 44 (3): 173-180.Background. Red gurnard, Chelidonichthys cuculus (Linnaeus, 1758), is distributed in the Mediterranean Sea, Black Sea, and in the eastern Atlantic Ocean from Norway to Mauritania, although it is rarely found in the North Sea and on the Norwegian shelf. The aim of this work was to conduct a comprehensive study of red gurnard in the Adriatic Sea on selected aspects the population biology and some of its environmental implications. Materials and methods. The sampling covered the entire subdivision GSA17 (north-central Adriatic Sea) and it was based on several bottom trawl surveys of MEDITS and GRUND projects from 2000 through 2009. Biometric parameters, as well as the spatial-and depth distributions were analyzed. The parameters such as the length-weight relation, sex, gonad maturity stage, and the stomach content were determined on a subsample of 539 specimens collected seasonally (summer and autumn-winter) within [2007][2008][2009]. The data were processed statistically. Results. Chelidonichthys cuculus was mainly distributed in the central Adriatic. Juveniles showed a distribution in shallower waters while adults tended to migrate towards the Croatian coast at greater depths. The total length of the fish sampled ranged from 40 to 303 mm (TL). We assumed the length of 100 mm as a threshold separating juveniles from adults and the length range of 170-190 mm as the maturity size for females and males. Isometric-and allometric growth patterns were showed for the juveniles and the adults, respectively. The diet was based almost exclusively on crustaceans (IRI% > 98%) and it did not change upon reaching the sexual maturity. Chelidonichthys cuculus should be considered a specialist predator feeding mostly on necto-benthic lophogastrids (IRI% > 72%). Conclusion. This work constitutes an attempt to summarize some environmental and biology aspects of the red gurnard in Adriatic population: differences in depth distribution and growth were found between juveniles and adults but not in diet. Males and females showed differences in growth parameters. Extending the studied area and collecting data of red gurnard in the main areas of production should help in better understanding the biology and dynamics of this species.

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Section: Tl [Mm]supporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Distribution and some biological parameters of the red gurnard, Chelidonichthys cuculus (Actinopterygii, Scorpaeniformes, Triglidae) in the north-central Adriatic Sea

Vallisneri¹,

Tommasini²,

Stagioni³

et al. 2014

Acta Ichthyol. Piscat

View full text Add to dashboard Cite

show abstract

“…In fact, gurnards showed changes of habitat during their demersal life, which has been related to the growth and spawning processes (Colloca, Cardinale, Marcello, & Ardizzone, ; Papaconstantinou, ). According to the literature, the gurnard species showed a critical size relationship coinciding with the onset of sexual maturity, the tendency to migrate to greater depths, and an increase in the variety of food items consumed (Vallisneri et al., ). In conclusion, it is important evaluate the differences in the shape of the sagittal otolith during growth because these age variations could be confused with stock variations.…”

Section: Discussionmentioning

confidence: 99%

“…In the laboratory, each specimen was measured for total length (TL, in mm) and weight (W, in g). A critical size of 120 and 150 mm linked to transition from immature (juveniles) to mature stage (adults) were considered for C. cuculus and C. lucerna, respectively, according to Vallisneri, Montanini, and Stagioni (). Mediteranean International Trawl Survey macroscopic sexual maturation scale (Relini, Carpentieri, & Murenu, ) was used to assess sexes.…”

Section: Methodsmentioning

confidence: 99%