Fish Biodiversity in the Mediterranean

A special issue of Fishes (ISSN 2410-3888). This special issue belongs to the section "Biology and Ecology".

Deadline for manuscript submissions: closed (10 March 2023) | Viewed by 2335

Special Issue Editor


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Guest Editor
Centre Oceanogràfic de les Balears, Instituto Español de Oceanografía (IEO-CSIC), 07015 Palma, Spain
Interests: fish ecology; fisheries; taxonomy

Special Issue Information

Dear Colleagues,

The Mediterranean Sea (0.82% of the global oceanic surface) holds 4%–18% of all known marine species (~17,000), with a high proportion of endemism. However, this exceptional biodiversity is faced with severe threats. The global change has also made it a topical issue, increasing concern about the worsening status of exploited marine species. Climate warming affects biodiversity distribution across all ecosystems, as well as the phylogenetic and functional components of coastal Mediterranean fish biodiversity by boosting meridionalization and tropicalization processes. The increase of Lessepsian species is affecting fish communities, basically in the Eastern basin, changing its biodiversity and impacting native fish populations and fisheries. Some of these species show invasive trends and are moving their distribution westwards.

The aim of this Special Issue is to collate papers (original research articles and reviews) focused on the improvement of fish biodiversity scientific knowledge for management purposes, including present status and trends and the identification of hotspots. Papers dealing with the improvement of knowledge on meridionalization and tropicalization processes, the conservation status of vulnerable species, local extinctions, changes in geographic distribution and the identification of poorly known taxonomic groups are welcome.

Dr. Francesc Ordinas
Guest Editor

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Keywords

  • marine fishes
  • biodiversity
  • mediterranean sea
  • monitoring
  • management
  • conservation

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Published Papers (1 paper)

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11 pages, 1175 KiB  
Brief Report
Zootechnical Brown Trout (Salmo trutta L. 1758) Ovarian Fluid Fails to Upregulate the Swimming Performances of Native Mediterranean Brown Trout (Salmo cettii Rafinesque, 1810) Sperm in the Biferno River
by Giusy Rusco, Michele Di Iorio, Stefano Esposito, Pierpaolo Gibertoni, Emanuele Antenucci, Valentino Palombo, Alessandra Roncarati and Nicolaia Iaffaldano
Fishes 2023, 8(4), 190; https://doi.org/10.3390/fishes8040190 - 31 Mar 2023
Viewed by 1983
Abstract
In external fertilizer fish, ovarian fluid (OF) seems to play a key role in fertilization success, improving spermatozoa swimming performance. These OF/sperm interaction mechanisms are frequently species-specific and/or population-specific and could decrease the risk of genetic introgression of wild populations from introduced or [...] Read more.
In external fertilizer fish, ovarian fluid (OF) seems to play a key role in fertilization success, improving spermatozoa swimming performance. These OF/sperm interaction mechanisms are frequently species-specific and/or population-specific and could decrease the risk of genetic introgression of wild populations from introduced or escaped zootechnical individuals. The Mediterranean brown trout (Salmo cettii) is threatened by genetic introgression with strains of domestic brown trout (Salmo trutta) that were introduced for recreational purposes. The aim of our study was to test if native S. cettii females, rather than zootechnical S. trutta, produce OF with a greater ability to upregulate the sperm motility of conspecific males. Thus, we compared the sperm swimming performances of males inhabiting the Biferno River (Molise region—Southern Italy) activated in native S. cettii vs. zootechnical S. trutta female’s OFs. In our study, native females’ OFs (20% diluted), compared to spring water, has the ability to significantly boost the sperm performance of the autochthonous males, while zootechnical S. trutta fails. These preliminary results suggest that OF-sperm interactions could potentially influence or direct the hybridization mechanisms involving the native Mediterranean trout inhabiting the Biferno River and the domestic lineage of brown trout introduced in the past. Full article
(This article belongs to the Special Issue Fish Biodiversity in the Mediterranean)
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