Age, growth and mortality of &lt;em&gt;Sciaena umbra&lt;/em&gt; (Sciaenidae) in the Gulf of Tunis

Chater, Ines; Romdhani-Dhahri, Ahlem; Dufour, Jean Louis; Mahé, Kélig; Chakroun-Marzouk, Nadia

doi:10.3989/scimar.04679.21a

Cited by 10 publications

(18 citation statements)

References 23 publications

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“…In this study, "b" value was calculated as 3.1909 and it was determined that growth was positive allometric (b>3). Few studies on the species reported that the growth were negative allometry (Karachle and Stergiou, 2008;Maci et al, 2009;Crec'hriou et al, 2013), while most of study reported to be positive allometric growth (Morey et al, 2003;Karakulak et al, 2006;La Mesa et al, 2008;Engin and Seyhan, 2009;Grau et al, 2009;Bilge et al, 2014;Chater et al, 2018). The "b" value may be different from one population to another of the same species.…”

Section: Discussionmentioning

confidence: 99%

Morphologic Characteristics and Length-Weight Relationships of Sciaena umbra (Linnaeus, 1758) in the Black Sea Coast

Aydın

Bodur

2021

Marine Science and Technology Bulletin

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In this study, the morphological characteristics and length-weight relationships of Sciaena umbra (Linnaeus, 1758) belonging to the Sciaenidae family, which is represented by five species in the Mediterranean basin and two species in the Black Sea, were investigated. Sampling was carried out in the Black Sea Region (Samsun, Ordu, Giresun, Trabzon) between March 2019 and February 2020. A total 54 of individuals were sampled and 15 different metric measurements were performed in each sample to determine their morphological characteristics. The mean total length and weight were estimated as 357.8 mm (117-580) and 845.3 g (16.4-2485.1), respectively. Total length was compared with morphometric characters and the lowest ratio was found with eye diameter (4.3%) and the highest ratio was with anal distance (59.9%). In the relation between the total length and morphological characters of the highest and the lowest correlation were observed in dorsal distance with r 2 =0.993 and the anal height with r 2 =0.938. A strong correlation (r 2 = 0.993) was found between the total length and weight relationship and the growth was positive allometric b> 3. This paper reports the first documented of morphometric characteristics of the species. It is considered to contribute to fisheries biology and international scientific literature.

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Section: Discussionmentioning

confidence: 99%

Morphologic Characteristics and Length-Weight Relationships of Sciaena umbra (Linnaeus, 1758) in the Black Sea Coast

Aydın

Bodur

2021

Marine Science and Technology Bulletin

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“…On the other hand, maximum age, which was reported as “oddly missing” in the previous analysis, seems to have gained quite a few new records (n = 187; Table 1 ) in the last five years, for instance, for the species Sciaena umbra [ 52 ], Trachinotus ovatus [ 53 ] and Alepes djedaba [ 54 ]. Conversely, mortality records are still very few and exist for only a small percentage of the Mediterranean fish species ( Fig 1 , top row and Table 1 ).…”

Section: Discussionmentioning

confidence: 99%

Scientific progress made towards bridging the knowledge gap in the biology of Mediterranean marine fishes

et al. 2022

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The Mediterranean Sea is a renowned biodiversity hotspot influenced by multiple interacting ecological and human forces. A gap analysis on the biology of Mediterranean marine fishes was conducted in 2017, revealing the most studied species and biological characteristics, as well as identifying knowledge gaps and areas of potential future research. Here, we updated this gap analysis five years later by reviewing the literature containing information on the same eight biological characteristics, namely length-weight relationships, growth, maximum age, mortality, spawning, maturity, fecundity and diet, for the 722 fish species of the Mediterranean Sea. The results revealed a considerable knowledge gap as 37% of the species had no information for any of the studied characteristics, while 13% had information on only one characteristic. Out of all the biological characteristics, the smallest knowledge gap was found in the length-weight relationships (studied for 51% of the species, mainly in the eastern Mediterranean), while the least studied characteristic was mortality (studied for 10% of the species). The western and eastern Mediterranean Sea were leading forces in data collection exhibiting the narrowest gaps between current and desired knowledge. The most studied species across the entire region were the highly commercial European hake (Merluccius merluccius), red mullet (Mullus barbatus), European anchovy (Engraulis encrasicolus), European pilchard (Sardina pilchardus), common pandora (Pagellus erythrinus), and annular seabream (Diplodus annularis). The knowledge gap has shrunk by 6% during the last five years, with 40 new species having at least one study on their biology. Moreover, research has slightly shifted towards species that have been traditionally neglected, e.g., sharks, rays and chimaeras (chondrichthyans). It is recommended that research becomes less focused on commercial species and more targeted towards the identified gaps, vulnerable species (e.g., deep-sea species and chondrichthyans) and species that could potentially pose a threat (e.g., non-indigenous species) to the ecosystems of the everchanging Mediterranean Sea.

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“…The maximum reported age for the meagre, Argyrosomus regius, in the Gulf of Cádiz (SW Iberian Peninsula) is 42 years (González-Quirós et al, 2011), while the brown meagre, Sciaena umbra, reached 31 years in the Gulf of Tunis (Chater et al, 2018). The dense calcium carbonate deposition of the large and very thick otoliths in Sciaenids reduces light transmission, making it almost impossible to distinguish hyaline and opaque zones (Arneri et al, 1998;Chater et al, 2018). According to Arneri et al (1998), growth increments in otoliths of these taxa are more readable in cross-sections.…”

Section: Opportunities For Fish Growth Chronology Constructionmentioning

confidence: 99%

Fish and Sclerochronology Research in the Mediterranean: Challenges and Opportunities for Reconstructing Environmental Changes

et al. 2020

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Over the past two decades, the field of sclerochronology has been rapidly developing, with scientists devoting significant efforts to studying the physical and chemical variations in hard tissues of aquatic organisms. Most of this research has been limited to certain taxa and geographic areas. Although growth increments in fish otoliths are used for sclerochronology purposes, relatively little has been done in the Mediterranean Sea. According to the literature, the chemical composition of otoliths from Mediterranean fish species has primarily been used for analyzing migration patterns, habitat use, and population structure of commercially important fish species. To the best of our knowledge, there are no studies on fish growth chronology construction conducted in the Mediterranean Sea. In order to identify the opportunities for sclerochronology research on fish from the Mediterranean, we used FishBase to identify potential candidate species with a sufficiently long lifespan and clearly defined growth increments for growth chronology construction and otolith chemistry research. We also present the challenges and limitations for sclerochronology research, including: (i) very few fish species in the Mediterranean Sea have a longevity of several decades; (ii) issues associated with reliable age determination for certain long-lived fish species; (iii) a general lack of understanding and effort to constructed and manage otolith collections; and (iv) limitations imposed by the availability of funding, expertise, and instrumentation. Despite these challenges, fish sclerochronology research has strong potential in the Mediterranean and adjacent seas. Recent studies in the Adriatic Sea have resulted in the construction of bivalve chronologies and the geochemical analysis of shells, providing important time-series data for comparative analysis and a multispecies approach. Furthermore, studies conducted in other parts of the world have demonstrated great potential for the use of fish otoliths in monitoring environmental variability and the effects of pollutants and disturbance.

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Age, growth and mortality of <em>Sciaena umbra</em> (Sciaenidae) in the Gulf of Tunis

Cited by 10 publications

References 23 publications

Morphologic Characteristics and Length-Weight Relationships of Sciaena umbra (Linnaeus, 1758) in the Black Sea Coast

Morphologic Characteristics and Length-Weight Relationships of Sciaena umbra (Linnaeus, 1758) in the Black Sea Coast

Scientific progress made towards bridging the knowledge gap in the biology of Mediterranean marine fishes

Fish and Sclerochronology Research in the Mediterranean: Challenges and Opportunities for Reconstructing Environmental Changes

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