A preliminary life history traits analysis of sharks in the Sea of Marmara (Türkiye), where deoxygenation and habitat deterioration are raising concerns

Hakan Kabasakal; Serdar Sakınan; Lovrenc Lıpej; Danijel Ivajnšıč

doi:10.3153/AR23008

EN

A preliminary life history traits analysis of sharks in the Sea of Marmara (Türkiye), where deoxygenation and habitat deterioration are raising concerns

Abstract

Life history traits of 17 species of sharks occurring in the Sea of Marmara were analysed based on Gower’s distances, Principal Coordinate Analyses, and hierarchical clustering. The analysis shows that the sharks of the Sea of Marmara can ecologically be divided into several clusters. The increasing occurrence of sharks on the Marmara continental shelf, especially in the last few years, suggests that the expected habitat compression due to deoxygenation has begun to take place. This situation, which can be considered as a “habitat trap” for sharks, should be considered as a threat that may lead to shark mortalities due to the intensification of bycatches or even the intentional killing of sharks. Available results are sufficient to predict a disturbing future for sharks of the Sea of Marmara if the factors (deoxygenation, habitat loss, bycatch, etc.) threatening the overall ecosystem do not improve.

Keywords

Thanks

Authors thank to shrimp fisherman, who provided the video footage of the bramble shark depicted in Figure 3, and requested to keep his name anonymous.

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Details

Primary Language

English

Subjects

Hydrobiology

Journal Section

Short Communication

Authors

Hakan Kabasakal ^*
0000-0001-5358-6330
Türkiye

Serdar Sakınan
0000-0002-5651-2836
The Netherlands

Lovrenc Lıpej
0000-0002-7608-1631
Slovenia

Danijel Ivajnšıč
0000-0003-4419-5295
Slovenia

Publication Date

January 1, 2023

Submission Date

November 13, 2022

Acceptance Date

December 11, 2022

Published in Issue

Year 2023 Volume: 6 Number: 1

DOI

https://doi.org/10.3153/AR23008

IZ

https://izlik.org/JA23SU97YG

Cite

RIS / Bibtex

APA

Kabasakal, H., Sakınan, S., Lıpej, L., & Ivajnšıč, D. (2023). A preliminary life history traits analysis of sharks in the Sea of Marmara (Türkiye), where deoxygenation and habitat deterioration are raising concerns. Aquatic Research, 6(1), 72-82. https://doi.org/10.3153/AR23008

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Anahtar Kelimeler

A preliminary life history traits analysis of sharks in the Sea of Marmara (Türkiye), where deoxygenation and habitat deterioration are raising concerns

Abstract

Keywords

Thanks

References

Details

Primary Language

Subjects

Journal Section

Authors

Publication Date

Submission Date

Acceptance Date

Published in Issue

DOI

IZ

Cite