Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters

YANKOVA, Maria Hristova; RAYKOV, Violin Stoyanov; FRATEVA, Petya Bogomilova

Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters

Maria Hristova YANKOVA, (Institute of fishing resources P. O. Box 72 4 Primorski Blvd., 9000 Varna., Bulgaria)

Violin Stoyanov RAYKOV, (Institute of fishing resources P. O. Box 72 4 Primorski Blvd., 9000 Varna., Bulgaria)

Petya Bogomilova FRATEVA (Institute of fishing resources P. O. Box 72 4 Primorski Blvd., 9000 Varna., Bulgaria)

Turkish Journal of Fisheries and Aquatic Sciences

3 0

Yıl: 2008 Cilt: 8 Sayı: 2 Sayfa Aralığı: 321 - 327 Metin Dili: İngilizce İndeks Tarihi: 29-07-2022

Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters

Öz:

Present analysis was performed on samples of horse mackerel Trachurus mediterraneus ponticus Aleev, 1956 collected at monthly intervals (April - September 2007) off the Bulgarian Black Sea territorial waters. Stomach contents of 1042 specimens were analyzed. Of the total number of examined stomachs, 597 were empty (57.3%). This percentage varied significantly with season, the maximum number of empty stomachs was observed during spring (52.3%) and a minimum number observed during summer (32.4%). The mean weight of stomach contents increased significantly for fish larger than 16 cm TL, while the mean number of prey items significantly declined in the large –size classes. Mean weight of stomach contents and mean number of prey significantly increased in spring-summer period. The stomach content consisted of several major prey groups: Crustacea (Copepoda, Cladocera, Mysidacea, Ampipoda, Isopoda, Decapoda), Polychaeta and Pisces. Mysidacea were the most important ingested prey, especially in small and medium size classes. Sprattus sprattus phalericus L. and Engraulis encrasicholus ponticus L., whose proportion increased in large size classes, were the most important food categories. Cladocera were food category with especially abundant in summer, while Amphipoda, Isopoda, Polychaeta and Decapoda were occasional foods. With fish growth, the proportion of planktonic organisms decreased, while that of fish increased. Feeding intensity varied throughout the year. The lowest feeding intensity was recorded in spring and the highest feeding intensity was recorded in summer.

Anahtar Kelime: Carangidae Black Sea horse mackerel feeding stomach content Trachurus mediterraneus ponticus Bulgaria Osteichthyes

Konular: Balıkçılık Zooloji

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	YANKOVA M, RAYKOV V, FRATEVA P (2008). Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters. , 321 - 327.
Chicago	YANKOVA Maria Hristova,RAYKOV Violin Stoyanov,FRATEVA Petya Bogomilova Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters. (2008): 321 - 327.
MLA	YANKOVA Maria Hristova,RAYKOV Violin Stoyanov,FRATEVA Petya Bogomilova Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters. , 2008, ss.321 - 327.
AMA	YANKOVA M,RAYKOV V,FRATEVA P Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters. . 2008; 321 - 327.
Vancouver	YANKOVA M,RAYKOV V,FRATEVA P Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters. . 2008; 321 - 327.
IEEE	YANKOVA M,RAYKOV V,FRATEVA P "Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters." , ss.321 - 327, 2008.
ISNAD	YANKOVA, Maria Hristova vd. "Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters". (2008), 321-327.

APA	YANKOVA M, RAYKOV V, FRATEVA P (2008). Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters. Turkish Journal of Fisheries and Aquatic Sciences, 8(2), 321 - 327.
Chicago	YANKOVA Maria Hristova,RAYKOV Violin Stoyanov,FRATEVA Petya Bogomilova Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters. Turkish Journal of Fisheries and Aquatic Sciences 8, no.2 (2008): 321 - 327.
MLA	YANKOVA Maria Hristova,RAYKOV Violin Stoyanov,FRATEVA Petya Bogomilova Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters. Turkish Journal of Fisheries and Aquatic Sciences, vol.8, no.2, 2008, ss.321 - 327.
AMA	YANKOVA M,RAYKOV V,FRATEVA P Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters. Turkish Journal of Fisheries and Aquatic Sciences. 2008; 8(2): 321 - 327.
Vancouver	YANKOVA M,RAYKOV V,FRATEVA P Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters. Turkish Journal of Fisheries and Aquatic Sciences. 2008; 8(2): 321 - 327.
IEEE	YANKOVA M,RAYKOV V,FRATEVA P "Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters." Turkish Journal of Fisheries and Aquatic Sciences, 8, ss.321 - 327, 2008.
ISNAD	YANKOVA, Maria Hristova vd. "Diet composition of horse mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea waters". Turkish Journal of Fisheries and Aquatic Sciences 8/2 (2008), 321-327.