The Exotic Species and Their Catch Per Unit Effort (CPUE) from Gillnet Fisheries in the Southern Aegean Coasts (Türkiye)

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

Bu çalışma, Güney Ege Kıyıları boyunca uzatma ağları balıkçılığından bazı egzotik balık çeşitliliğini ortaya koymakta ve egzotik balıkların birim çaba başına düşen av değerlerini sunmaktadır. Araştırmada Ege Denizi'nde Lesepsiyen balon balığı (Lagocephalus sceleatus), aslan balığı (Pterois miles),sincap balığı (Sargocentron rubrum), sokar balıkları (Siganus sp.) ve bir mavi yengeç (Portunus segnis) yakalandı. Sokar balıkları ve mavi yengeç balık pazarlarında satılmaktadır. Mevsimsel olarak, ortalama egzotik balık CPUE’si, en yüksek sonbaharda 0,7 ± 0,3 kg.1000 m-1 olarak hesaplanmıştır. Bu değer, toplam mevsimsel CPUE’den 72 kat daha az olduğunu göstermiştir.

Abstract

This study presents some exotic fish diversity and catch per unit effort values of exotic fish from gillnet fishery along the southern Aegean Sea. Lessepsian puffer fish (Lagocephalus sceleratus), lionfish (Pterois miles), squirrelfish (Sargocentron rubrum), rabbitfish (Siganus sp.) and a blue crab (Portunus segnis) were caught in the Aegean Sea. Rabbitfish and blue crab sell in the fish markets. Seasonally, the average CPUE of exotic fish was calculated to be 0.7 ± 0.3 kg.1000 m-1 in autumn in catch. This value indicated that it was 72 times lesser than the total seasonal CPUE.

Related collections

Most cited references 8

Record: found
Abstract: found
Article: found

Is Open Access

Welcome to the Tidyverse

Hadley Wickham, Mara Averick, Jennifer Bryan … (2019)

0 comments Cited 4064 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: found

Is Open Access

The Biodiversity of the Mediterranean Sea: Estimates, Patterns, and Threats

Marta Coll, Chiara Piroddi, Jeroen Steenbeek … (2010)

The Mediterranean Sea is a marine biodiversity hot spot. Here we combined an extensive literature analysis with expert opinions to update publicly available estimates of major taxa in this marine ecosystem and to revise and update several species lists. We also assessed overall spatial and temporal patterns of species diversity and identified major changes and threats. Our results listed approximately 17,000 marine species occurring in the Mediterranean Sea. However, our estimates of marine diversity are still incomplete as yet—undescribed species will be added in the future. Diversity for microbes is substantially underestimated, and the deep-sea areas and portions of the southern and eastern region are still poorly known. In addition, the invasion of alien species is a crucial factor that will continue to change the biodiversity of the Mediterranean, mainly in its eastern basin that can spread rapidly northwards and westwards due to the warming of the Mediterranean Sea. Spatial patterns showed a general decrease in biodiversity from northwestern to southeastern regions following a gradient of production, with some exceptions and caution due to gaps in our knowledge of the biota along the southern and eastern rims. Biodiversity was also generally higher in coastal areas and continental shelves, and decreases with depth. Temporal trends indicated that overexploitation and habitat loss have been the main human drivers of historical changes in biodiversity. At present, habitat loss and degradation, followed by fishing impacts, pollution, climate change, eutrophication, and the establishment of alien species are the most important threats and affect the greatest number of taxonomic groups. All these impacts are expected to grow in importance in the future, especially climate change and habitat degradation. The spatial identification of hot spots highlighted the ecological importance of most of the western Mediterranean shelves (and in particular, the Strait of Gibraltar and the adjacent Alboran Sea), western African coast, the Adriatic, and the Aegean Sea, which show high concentrations of endangered, threatened, or vulnerable species. The Levantine Basin, severely impacted by the invasion of species, is endangered as well. This abstract has been translated to other languages (File S1).