Are there life‐history constraints on restoration of the endangered limpet Patella ferruginea (Mollusca, Gastropoda) in the northern Mediterranean Sea?

2021 ◽  
Author(s):  
Maria Paola Ferranti ◽  
Javier Guallart ◽  
Virginia Cortella ◽  
Giacomo Terenziani ◽  
Mariachiara Chiantore
Keyword(s):  
Life History ◽  
Mediterranean Sea ◽  
Patella Ferruginea

Life-history traits of the marbled electric ray, Torpedo marmorata Risso, 1810, from the Greek Seas, north-eastern Mediterranean Sea

2021 ◽  
Author(s):  
Archontia Chatzispyrou ◽  
Chrysoula Gubili ◽  
Konstantinos Touloumis ◽  
Dimitrios Karampetsis ◽  
Serafeim Kioulouris ◽  
...  
Keyword(s):  
Life History ◽  
Mediterranean Sea ◽  
Life History Traits ◽  
Eastern Mediterranean ◽  
Torpedo Marmorata ◽  
Eastern Mediterranean Sea ◽  
North Eastern

Life history of the bathyal octopus Pteroctopus tetracirrhus (Mollusca, Cephalopoda) in the Mediterranean Sea

2009 ◽  
Vol 56 (8) ◽  
pp. 1379-1390 ◽  
Author(s):  
Antoni Quetglas ◽  
Francesc Ordines ◽  
María González ◽  
Ignacio Franco
Keyword(s):  
Life History ◽  
Mediterranean Sea ◽  
History Of ◽  
The Mediterranean

scholarly journals Bio-Ecological Features Update on Eleven Rare Cartilaginous Fish in the Central-Western Mediterranean Sea as a Contribution for Their Conservation

Life ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 871
Author(s):  
Antonello Mulas ◽  
Andrea Bellodi ◽  
Pierluigi Carbonara ◽  
Alessandro Cau ◽  
Martina Francesca Marongiu ◽  
...  
Keyword(s):  
Life History ◽  
Mediterranean Sea ◽  
Stomach Content Analysis ◽  
Western Mediterranean ◽  
Reproductive Period ◽  
Cartilaginous Fish ◽  
Management Actions ◽  
Western Mediterranean Sea ◽  
Ecological Features ◽  
Key Species

Cartilaginous fish are commonly recognized as key species in marine ecosystems for their fundamental ecological role as top predators. Nevertheless, effective management plans for cartilaginous fish are still missing, due to the lack of knowledge on their abundance, distribution or even life-history. In this regard, this paper aims at providing new information on the life-history traits, such as age, maturity, reproductive period, in addition to diet characteristics of eleven rare cartilaginous fish inhabiting the Central-Western Mediterranean Sea belonging to the orders Chimaeriformes (Chimaera monstrosa), Hexanchiformes (Heptranchias perlo and Hexanchus griseus), Myliobatiformes (Aetomylaeus bovinus and Myliobatis aquila), Rajiformes (Dipturus nidarosiensis and Leucoraja circularis), Squaliformes (Centrophorus uyato, Dalatias licha and Oxynotus centrina) and Torpediniformes (Tetronarce nobiliana), useful for their assessment and for future management actions. Particularly, the present paper provides for the first time the age estimation of D. nidarosienis and L. circularis which were both found capable of becoming older than ten years. In addition, the present study updates the sizes of first maturity of C. uyato and D. licha, which appeared to be capable of reproducing earlier than what was previously hypothesized, representing very valuable information for a better understanding of these rare species populations status and, eventually, their conservation. On the basis of the stomach content analysis, it was possible to identify five different predator groups.

scholarly journals Changes in Life History Traits of Small Pelagic Fish in the Western Mediterranean Sea

2021 ◽  
Vol 8 ◽  
Author(s):  
Marta Albo-Puigserver ◽  
Maria Grazia Pennino ◽  
Jose María Bellido ◽  
Ana Isabel Colmenero ◽  
Ana Giráldez ◽  
...  
Keyword(s):  
Life History ◽  
Mediterranean Sea ◽  
Body Condition ◽  
Life History Traits ◽  
Seawater Temperature ◽  
Western Mediterranean ◽  
Pelagic Fish ◽  
Additive Models ◽  
Small Pelagic Fish ◽  
Western Mediterranean Sea

Small pelagic fish (SPF) in the western Mediterranean Sea are key elements of the marine food web and are important in terms of biomass and fisheries catches. Significant declines in biomass, landings, and changes in the age/size structure of sardine Sardina pilchardus and anchovy Engraulis encrasicolus have been observed in recent decades, particularly in the northern area of the western Mediterranean Sea. To understand the different patterns observed in SPF populations, we analyzed key life history traits [total length at age, length at maturity, gonadosomatic index (GSI), and body condition (Kn)] of sardine and anchovy collected between 2003 and 2017, from different fishing harbors distributed along a latitudinal gradient from northern to southern Spain. We used Generalized Linear Models (GLM) to estimate the length at maturity and Generalized Additive Models (GAMs) to test the relationship with environmental variables (seawater temperature, water currents, and net primary productivity). The life history traits of both species presented seasonal, interannual and latitudinal differences with a clear decline in length at age, length at first maturity, and body condition, for both species in the northern part of the study area. In the southern part, on the contrary, life history traits did not present a clear temporal trend. The environmental conditions partially explained the long-term changes in life history traits, but the selected variables differed between areas, highlighting the importance of regional oceanographic conditions to understand the dynamics of small pelagic fish. The truncated length-at-age pattern for both species with the disappearance of the larger individuals of the population could have contributed to the poor condition of small pelagic fish populations in the northern part of the western Mediterranean Sea in recent years. In the south area, recent declines in body condition for sardine and anchovy were observed and could be a possible first sign for future population declines. This study highlights the importance of understanding the trade-off between the energy invested in reproduction, maintenance and growth at seasonal and interannual level to advance our knowledge on how environmental and human pressures influence population dynamics of small pelagic fish at local and regional scales.

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