Growth and age estimation of the greater forkbeard, Phycis blennoides (Actinopterygii: Gadiformes: Phycidae), from the Gulf of Tunis (central Mediterranean)

Romdhani, Ahlem; Ktari, M. H.; Dufour, Jean-Louis; Mahé, Kélig; Francour, Patrice

doi:10.3750/aip2016.46.1.03

Cited by 4 publications

(1 citation statement)

References 26 publications

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“…Although the “demersal check ring” is known for several species ( Phycis phycis, P. blennoides ; Abecasis, Canha, Reis, Pinho, & Gil‐Pereira, ; Casas & Piñeiro, ; Romdhani, Ktari, Dufour, Mahe, & Francour, ), it was never described for H. dactylopterus in previous literature.…”

Section: Discussionmentioning

confidence: 99%

Population pattern and dynamics of the Bluemouth Helicolenus dactylopterus (Delaroche, 1809) in the eastern Mediterranean Sea

et al. 2018

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Summary Present study evaluated the population status of the Bluemouth (Helicolenus dactylopterus) population distributed in the Antalya Bay for the first time, within the scope of two different surveys carried out in monthly basis, between September 2009 and June 2011 (200–900 m). In accordance with the major availability of the food, 80.9% of the total catch (in number) of the species at the upper slope (200–499 m). The 80.8% of all recruits’ specimens inhabits between 200 and 399 m while 72% of the total spawner specimens (TL ≥ 20 cm) inhabits at depths of between 600 and 799 m. Highest average abundance of the species was estimated 1,060 n/km2 (400 m), while the highest average biomass was 93 kg/km2 (600 m). Lengths of individuals ranged from 4 to 36 cm, and estimated ages from 0 to 27 years. Parameters of the von Bertalanffy growth curves were L∞ = 34.14 cm, K = 0.09 year−1, and t0 = −1.28 years. Margin band analysis confirmed the formation of a single growth annulus per year. In the central part of the otolith, close to the nucleus, a strongly marked check ring is formed which presenting first time for this species in the literature. The duration of the spawning stage for the females was observed between December and February. Selectivity rate of the commercially used 44 mm diamond codend mesh, with a 7.4 cm catch size, found to be very low for the species (a first spawning size of 17–20 cm). The stock of Bluemouth in the Antalya Bay was considered in above reference levels and in high abundance status due to estimated low fishing mortality (0.067−1), exploitation rate status below reference level (0.207−1) and Fcurr is very low than reference point (0.219−1).

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Section: Discussionmentioning

confidence: 99%

Population pattern and dynamics of the Bluemouth Helicolenus dactylopterus (Delaroche, 1809) in the eastern Mediterranean Sea

et al. 2018

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Population structure, reproduction and exploitation of the greater forkbeardPhycis blennoides(Brünnich, 1768) from the Algerian basin

Alioua

Amira

Khames

et al. 2020

Aquat. Living Resour.

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The objective of this study was to determine the population distribution and some biological aspects for fish stock assessment of the greater forkbeard Phycis blennoides along the Algerian basin. The distribution of P. blennoides (3418 individuals) was studied using data collected between 170–779 m depth during two bottom trawl surveys developed on 2003 and 2004. Additionally, some biological parameters were obtained from 1050 individuals sampled from commercial fisheries in Algerian ports (i.e. Annaba, Azeffoun, Dellys, Cap Djinet, Zemmouri, Bouharoun, Algiers, La Madrague, Cherchell, Tenes and Mostaganem) during the period 2013–2017. P. blennoides sampled from bottom trawl surveys showed a depth related distribution with the largest individuals being found at 600–800 m depth and the smallest at shallower depths. Density and biomass varied with depth and density also with longitude, while biomass showed no pattern with longitude. Recruitment was recorded in the eastern sector of Algeria during winter, for individuals sampled by bottom trawl surveys. Young P. blennoides entered commercial fisheries in summer, with an overall sex ratio skewed towards males (1F:2.18M). The size at first maturity (L 50) was 24.30 cm and 30.39 cm for males and females, respectively. The age at 50% maturity was 2–3 years for specimens collected by a bottom trawl survey in 2003 and commercial fisheries, but 3–4 years for the bottom trawl survey in 2004.

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Morphohistology and histopathology of the digestive organs of the deep-water fish greater forkbeard, Phycis blennoides

Alioua

Amira

Semiane

et al. 2020

Fisheries &Amp; Aquatic Life

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The aim of this paper was to report on an examination of the digestive organs in the deep-water fish Phycis blennoides (Brünnich) from Algerian coastal waters. A total of 1,019 specimens (5.7–62.7 cm in total length) obtained from commercial fisheries were examined between December 2013 and May 2017. The anatomical study was conducted using morphometric measurements of different sections of the digestive tract of P. blennoides. The histological features of the digestive tract were examined in the esophagus, stomach, intestine, and pyloric cecum. They were compatible with carnivorous feeding behavior and confirmed by a low intestinal quotient (IQ = 0.72 ± 0.13). The histopathological assessment highlighted the hepatic steatosis and parasitic infestation in its intestine from Anisakis simplex, which also occurs in Algerian coastal waters. According to our knowledge, this paper reports for the first time the morphohistological analysis of the digestive tract of a Phycidae species in Africa and provides the first histopathological assessment of the digestive organs of the greater forkbeard in the southwestern Mediterranean Sea.

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Growth and age estimation of the greater forkbeard, Phycis blennoides (Actinopterygii: Gadiformes: Phycidae), from the Gulf of Tunis (central Mediterranean)

Cited by 4 publications

References 26 publications

Population pattern and dynamics of the Bluemouth Helicolenus dactylopterus (Delaroche, 1809) in the eastern Mediterranean Sea

Population pattern and dynamics of the Bluemouth Helicolenus dactylopterus (Delaroche, 1809) in the eastern Mediterranean Sea

Population structure, reproduction and exploitation of the greater forkbeardPhycis blennoides(Brünnich, 1768) from the Algerian basin

Morphohistology and histopathology of the digestive organs of the deep-water fish greater forkbeard, Phycis blennoides

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