Relationship Between by Catch Ratio of Sardine-Anchovy Targeted Purse Seine and Some Environmental Factors Based on a General Addictive Model in the Aegean Sea

A multidisciplinary study was conducted in order to investigate the environmental factors affecting the planktonic foraminiferal and pteropod communities of the south Aegean Sea. Aspects of the Late Quaternary paleoceanographic evolution were revealed by means of quantitative analyses of planktonic foraminiferal and pteropod assemblages (including multivariate statistical approach; principal component analysis (PCA)), the oxygen (δ18O) and carbon (δ13C) isotopic composition of planktonic foraminifera and related paleoceanographic (planktonic paleoclimatic curve (PPC), productivity (E-index), stratification (S-index), seasonality) indices, extracted by the gravity core KIM-2A derived from the submarine area between Kimolos and Sifnos islands. Focusing on the last ~21 calibrated thousands of years before present (ka BP), cold and eutrophicated conditions were identified during the Late Glacial period (21.1–15.7 ka BP) and were followed by warmer and wetter conditions during the deglaciation phase. The beginning of the Holocene was marked by a climatic amelioration and increased seasonality. The more pronounced environmental changes were identified during the deposition of the sapropel sublayers S1a (9.4–7.7 ka BP) and S1b (6.9–6.4 ka BP), with extremely warm and stratified conditions. Pteropod fauna during the sapropel deposition were recorded for the first time in the south Aegean Sea, suggesting arid conditions towards the end of S1a. Besides sea surface temperature (SST), which shows the highest explanatory power for the distribution of the analyzed fauna, water column stratification, primary productivity, and seasonality also control their communities during the Late Quaternary.

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The Abundance and Distribution of the Early Life Stages of Sardine (Sardina pilchardus) in Central of the Aegean Sea (Sığacık Bay) and their Interactions with Certain Environmental Factors

Thalassas An International Journal of Marine Sciences ◽

10.1007/s41208-020-00216-w ◽

2020 ◽

Vol 36 (2) ◽

pp. 507-515

Author(s):

Orçin Uygun ◽

Belgin Hoşsucu

Keyword(s):

Environmental Factors ◽

Early Life ◽

Aegean Sea ◽

Life Stages ◽

Sardina Pilchardus ◽

Early Life Stages ◽

Abundance And Distribution

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Chondrichthyan by-catch and discards in the demersal trawl fishery of the central Aegean Sea (Eastern Mediterranean)

Fisheries Research ◽

10.1016/j.fishres.2010.12.012 ◽

2011 ◽

Vol 108 (1) ◽

pp. 142-152 ◽

Cited By ~ 32

Author(s):

Dimitrios Damalas ◽

Vassiliki Vassilopoulou

Keyword(s):

Eastern Mediterranean ◽

Aegean Sea ◽

Trawl Fishery ◽

By Catch

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The Influence of Environmental Factors and Mitigation Measures on By-Catch Rates of Seabirds by Japanese Longline Fishing Vessels in the Australian Region

Emu - Austral Ornithology ◽

10.1071/mu98042 ◽

1998 ◽

Vol 98 (4) ◽

pp. 305-316 ◽

Cited By ~ 45

Author(s):

Neil Klaer ◽

Tom Polacheck

Keyword(s):

Environmental Factors ◽

Mitigation Measures ◽

Australian Region ◽

Fishing Vessels ◽

By Catch ◽

Catch Rates

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Catch composition and management of daytime purse seine fishery on the Southern Mediterranean Sea Coast, Abu Qir Bay, Egypt

Mediterranean Marine Science ◽

10.12681/mms.270 ◽

2001 ◽

Vol 2 (2) ◽

pp. 119 ◽

Cited By ~ 9

Author(s):

A. EL-HAWEET

Keyword(s):

Purse Seine ◽

Target Species ◽

Catch Per Unit Effort ◽

Main Target ◽

Length Range ◽

Target Fish ◽

Southern Mediterranean ◽

By Catch ◽

Abu Qir Bay ◽

Catch Composition

The present work aimed to obtain precise data on the catch of the purse seine net operating at daytime from sunrise till noon in Abu Qir Bay during 1997 and 1998. Sardine, anchovy, mullet and rabbitfish were recorded as the main target fish groups. Twenty-seven species were recorded as by-catch species. Catch per unit effort was estimated to be 93 kg/day/boat. The percentage of each target species in the catch and its length frequency distribution were presented. The length range of by-catch species and the season of catch were recorded. Daytime purse seine in Abu Qir Bay is an effective method but should regulated by directing the fishing to deeper waters outside the bay rather than the inshore coastal area to conserve many economic species of this important fishery.

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Species diversity and dominancy indexes in Izmir Bay (Aegean Sea) purse seine fishery

Ege Journal of Fisheries and Aquatic Sciences ◽

10.12714/egejfas.37.4.05 ◽

2020 ◽

Vol 37 (4) ◽

pp. 353-356

Author(s):

Ahmet Mert Senbahar ◽

Özlem Güleç ◽

Zafer Tosunoglu

Keyword(s):

Dominant Species ◽

Diversity Index ◽

Aegean Sea ◽

Purse Seine ◽

Total Biomass ◽

Sardina Pilchardus ◽

Izmir Bay ◽

Bony Fishes ◽

Sardinella Aurita ◽

Purse Seine Fishery

To determine the diversity index values of species caught by purse seine, all samplings were carried out between September 2, 2017, and April 6, 2018 in Izmir Bay. As a result, a total of 17 fish species (Osteichthyes) belonging to 11 families and also 2 species from invertebrates (Cephalopoda and Arthropoda) were determined. Bony fishes and invertebrates consist of 99.9% and 0.1% of the total biomass, respectively. Sardina pilchardus was the most dominated species that occupied as 80.2% of the overall bony fishes followed by Engraulis encrasicolus (14.6%) and Sardinella aurita (1.5%). Diversity index values of species were found-1.026 by Shannon-Weaver and 0.63 by Simpsons, respectively. The highest dominancy was found for S. pilchardus with 71.1%. Overall final results indicate that the diversity of species in Izmir Bay purse seine fishery is very low and also S. pilchardus is the most over-dominant species.

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PENANGKAPAN TUNA DENGAN MENGGUNAKAN KAPAL RISET M. V. SEAFDEC DI PERAIRAN SAMUDERA HINDIA

BAWAL Widya Riset Perikanan Tangkap ◽

10.15578/bawal.1.3.2006.95-105 ◽

2017 ◽

Vol 1 (3) ◽

pp. 95 ◽

Cited By ~ 1

Author(s):

Budi Nugraha ◽

Erfind Nurdin

Keyword(s):

Purse Seine ◽

Skipjack Tuna ◽

Bigeye Tuna ◽

Migratory Species ◽

Long Line ◽

By Catch

Tuna merupakan jenis ikan peruaya jauh (highly migratory species) dan hidup bergerombolan. Tuna long lina dan tuna purse Seine merupakan alat tangkap yang sangat efektif digunakan terutama untuk menangkap tuna di perairan terbuka atau samudera. Tulisan ini memberikan data dan informasi mengenai kegiatan penangkapan tuna dengan kapal riset M. V. SEAFDEC milik SEAFDEC Thailand pada bulan Desember 2004 di perairan Samudera Hindia sebelah barat Sumatera dengan menggunakan alat tangkap tuna long line dan tuna purse seine Hasil tangkapan tuna long line didominasi oleh swordfish, diikuti oleh bigeye tuna dan yellovvlin tura, sedangkan hasil tangkapan tuna purse seine didominasi oleh skipjack tuna, diikuti oleh bigaye tuna, yelloMin tuna, dan ikan lain (by catch).

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