Reproductive Biology of Male European Hake (Merluccius merluccius) in Central Mediterranean Sea: An Overview from Macroscopic to Molecular Investigation

Mascoli, Alessia; Candelma, Michela; Santojanni, Alberto; Carnevali, Oliana; Colella, Sabrina

doi:10.3390/biology12040562

Cited by 4 publications

(2 citation statements)

References 60 publications

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“…Asymptotic length (L∞) was lower than those obtained in similar studies from the Strait of Gibraltar [4], Atlantic [52], Tunisian coast [19], Sea of Marmara [20], and the North Aegean [12], with the maximum size in the Mediterranean reportedly limited to 80-90 cm [7]. Growth index (Φ′) in this study (2.7) was lower than those observed in previous studies (between 2.8 and 3.4).…”

Section: Discussioncontrasting

confidence: 81%

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Population biology of European hake (Merluccius merluccius, Linnaeus, 1758) in Greece

Klaoudatos,

Theocharis,

Vlachou

et al. 2023

Academia Biology

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The European hake (Merluccius merluccius) is one of the most important demersal species in the Mediterranean Sea. A total of 861 individuals were collected using commercial bottom trawls, between May 2021 and October 2022 from the Aegean Sea (the Eastern Mediterranean) aiming to assess the current state of the population. The male to female ratio (0.92:1) did not significantly depart from 1:1, with length-weight relationships exhibiting positive allometric growth. There were seven age groups identified, with the second age group being the most predominate. The highest reproductive intensity was observed during spring followed by winter. The onset of sexual maturity (L50) for the total population was estimated at 27.58 cm in total length (3.2 years). The asymptotic length was estimated at 65.19 cm for the total population, with females growing larger than males. Longevity was estimated at 22.7 years for the total population (24.9 years for females and 16.1 years for males). The inflection point was estimated at 7.5 years for the total population (8.2 years for females and 5.2 years for males). Length with 50% probability of capture (LC50) was estimated at 17.7 cm, with the respective age (t50) of 1.2 years. The exploitation rate (E = 0.72) indicated that the population is under a high level of exploitation and the Z/K ratio (7.81) further indicated that mortality dominates growth. Fishing mortality at the maximum sustainable yield (FMSY = 0.29) was estimated considerably lower than the present fishing mortality (F = 0.69). Results indicate the need for enforcement of stricter management measures to protect the stock.

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Section: Discussioncontrasting

confidence: 81%

“…Reproduction occurs throughout the year, with intensity and peaks varying among regions. Larger individuals exhibit delayed maturity in colder, nutrient-rich waters like the Atlantic compared to warmer waters of the Mediterranean Sea, and particularly the Adriatic [7].…”

Section: Introductionmentioning

confidence: 99%

Population biology of European hake (Merluccius merluccius, Linnaeus, 1758) in Greece

Klaoudatos,

Theocharis,

Vlachou

et al. 2023

Academia Biology

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Reproductive aspects of European hake, (Merluccius merluccius, Linnaeus, 1758) based on histological depiction of both sexes in the Eastern Mediterranean (Aegean Sea)

Apostologamvrou,

Vlachou,

Theocharis

et al. 2023

Regional Studies in Marine Science

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Diving into the fish pathology of an important commercial fish species: the case of the European hake (Merluccius merluccius Linnaeus, 1758) in the northwest Mediterranean Sea

Muns‐Pujadas,

Constenla,

Dallarés

et al. 2024

Journal of Fish Biology

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The gross pathology and the histopathological alterations identified in juvenile specimens of the European hake (Merluccius merluccius), one of the most important target species of commercial fisheries in the northwest Mediterranean, are described. A qualitative and semi‐quantitative histological approach was performed in specimens from 2007 and 2019. Prevalence and mean intensity of parasites and histopathological changes were calculated in both years. No macroscopic alterations were found in any organ but several parasites (e.g., copepods, nematodes, digeneans) were detected. Microscopically, alterations identified in gills included foci of inflammation and hyperplasia (present in 77.38% of hakes from both years), extensive hyperplasia (33.33%), and inflammation (16.65%) that were potentially related to the mechanical effects of monogeneans and copepods, cysts of unknown etiology (62.69%), and lamellar inflammation associated to Aporocotyle spinosicanalis eggs (8.33%). Granulomas and inflammatory focus were detected in the liver, spleen, and stomach, apparently associated with the presence of nematodes. Coelozoic myxosporean parasites were detected within the renal tubules (66.66%). Most of the pathologies detected were similar to those described in other gadoid species (i.e., Gadus morhua) and were usually related to the presence of ecto and endoparasites. The potential impact of parasites on the health of this fish species is discussed for improving the knowledge and management of these valuable fishing stocks.

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Reproductive Biology of Male European Hake (Merluccius merluccius) in Central Mediterranean Sea: An Overview from Macroscopic to Molecular Investigation

Cited by 4 publications

References 60 publications

Population biology of European hake (Merluccius merluccius, Linnaeus, 1758) in Greece

Population biology of European hake (Merluccius merluccius, Linnaeus, 1758) in Greece

Reproductive aspects of European hake, (Merluccius merluccius, Linnaeus, 1758) based on histological depiction of both sexes in the Eastern Mediterranean (Aegean Sea)

Diving into the fish pathology of an important commercial fish species: the case of the European hake (Merluccius merluccius Linnaeus, 1758) in the northwest Mediterranean Sea

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