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Diet Composition of Horse Mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea Waters

Yıl 2008, Cilt: 8 Sayı: 2, - , 01.04.2008

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 highest feeding intensity was recorded in summer.

Diet Composition of Horse Mackerel, Trachurus mediterraneus ponticus Aleev, 1956 (Osteichthyes: Carangidae) in the Bulgarian Black Sea Waters

Yıl 2008, Cilt: 8 Sayı: 2, - , 01.04.2008

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 highest feeding intensity was recorded in summer.

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Ayrıntılar

Birincil Dil Türkçe
Bölüm Makaleler
Yazarlar

Maria Hristova Yankova Bu kişi benim

Violin Stoyanov Raykov Bu kişi benim

Petya Bogomilova Frateva Bu kişi benim

Yayımlanma Tarihi 1 Nisan 2008
Yayımlandığı Sayı Yıl 2008 Cilt: 8 Sayı: 2

Kaynak Göster

APA Yankova, M. H., Raykov, V. S., & Frateva, P. B. (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).
AMA Yankova MH, Raykov VS, Frateva PB. 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. Nisan 2008;8(2).
Chicago Yankova, Maria Hristova, Violin Stoyanov Raykov, ve Petya Bogomilova Frateva. “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, sy. 2 (Nisan 2008).
EndNote Yankova MH, Raykov VS, Frateva PB (01 Nisan 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
IEEE M. H. Yankova, V. S. Raykov, ve P. B. Frateva, “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, c. 8, sy. 2, 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 (Nisan 2008).
JAMA Yankova MH, Raykov VS, Frateva PB. 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.
MLA 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, c. 8, sy. 2, 2008.
Vancouver Yankova MH, Raykov VS, Frateva PB. 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).