Marmara Denizi'nde Algarna ile Avlanan Triglidae Türlerinin Boy-Ağırlık İlişkisi ve Bolluk Dağılımı

Yıl 2018, Cilt: 1 Sayı: 1, 13 - 19, 24.07.2018

Ali İşmen , Haşim İnceoğlu , Mukadder Arslan İhsanoğlu , Cahide Çiğdem Yığın , Mine Çardak , Burak Daban , Engin Kocabaş Zeki Özer Alpaslan Kara , Murat Şirin , Ahmet Öktener

Öz

Bu çalışmada,
Marmara Denizi'nde üç kırlangıç türünün Chelidonichthys
lucerna (Linnaeus, 1758), Lepidotrigla
cavillone (Lacepède, 1801), Eutrigla
gurnardus (Linnaeus, 1758)’un boy-ağırlık ilişkileri, birim av miktarları
ve bollukları (CPUE kg/sa, N/sa) mevsimlere, bölgelere ve derinliklere göre
belirlenmiştir. Örnekler Ekim 2011- Temmuz 2014 tarihleri arasında algarna av
aracı kullanılarak aylık olarak elde edilmiştir. Marmara Denizi altı av
sahasına; 1. bölge: Erdek, 2. bölge: Tekirdağ, 3. bölge: Marmara Adası, 4.
bölge: Kapıdağ, 5. bölge: Yalova, 6. bölge: Silivri ayrılarak, toplam 229 adet
algarna çekimi yapılmıştır. 3 triglidae türü için b değeri 2,66 ile 2,85
arasında değişmiştir. C. lucerna ve L. cavillone negatif allometrik büyüme, E.gurnardus izometrik büyüme
göstermiştir. Algarna ile avlanan türlerin toplam birim avı 63,6 kg/sa, kemikli
balıkların birim avı 4,7 kg/sa, triglidae familyasına ait balıkların birim
avları 0,422 kg/sa (%9) dir. Kırlangıç türleri arasında en yüksek bolluk C. lucerna türünde (0,305 kg/sa - 2,5
N/sa) belirlenmiştir ve onu sırasıyla L.
cavillone (0,066 kg/sa-1,9 N/sa) ve E.
gurnardus (0,051 kg/sa - 0,96 N/sa) türleri takip etmiştir. Mevsimlere göre
en yüksek bolluk C. lucerna ve L. cavillone türleri için yaz döneminde,
E. gurnardus için ilkbaharda
bulunmuştur. Bölgelere göre en yüksek bolluk C. lucerna için Tekirdağ'da, L.
cavillone için Kapıdağ Yarımadası'nda ve E. gurnardus için Marmara Adası av sahasında tespit edilmiştir.
Derinliklere göre triglidae türlerinin birim av miktarı değişmiştir. C. lucerna ve L. cavillone'nin
50-100 m derinlik aralığında, E.
gurnardus’un 100 m'den daha derinlerde daha bol olduğu tespit
edilmiştir.

Anahtar Kelimeler

Marmara Denizi, Chelidonichthys lucerna, Lepidotrigla cavillone, Eutrigla gurnardus, boy-ağırlık ilişkisi, birim av

Length-Weight Relationships and Abundance Distribution of Triglidae Species Caught by Beam-trawl in The Sea of Marmara

Öz

In this study, length–weight relationships and
the catch per unit effort-relative abundance (CPUE kg/h, N/h) of the three-gurnard
species Chelidonichthys lucerna
(Linnaeus, 1758), Lepidotrigla cavillone
(Lacepède, 1801), Eutrigla gurnardus
(Linnaeus, 1758) were determined according to season, area and depth in the Sea
of Marmara. Samples were obtained by beam trawl monthly between October
2011-July 2014. Total of 229 station were sampled. Totally six fishing area
distributed as 1. area: Erdek, 2. area: Tekirdağ, 3. area: Marmara Island, 4.
area: Kapıdağ, 5. area: Yalova and 6. area: Silivri. The parameter b for 3
triglidae species ranged from 2.66 to 2.85. The exponent b typically indicated C. lucerna and L. cavillone negative allometric growth, E.gurnardus isometric growth. The relative abundance of all species
caught by beam trawl, bony fishes and triglidae species were determined as 63.6
kg/h, 4.7 kg/h and 0.422 kg/h (9%), respectively. The highest abundance (CPUE)
in triglidae family was determined as 0.305 kg/h (2.5 N/h) in C. lucerna species and followed by L. cavillone 0.066 kg/h (1.9 N/h and E. gurnardus 0.051 kg/h (0.96 N/h)
species. According to the seasons, the highest abundance of C. lucerna and L. cavillone species was found in the summer, spring for E. gurnardus species. According to the
region, the highest abundance was found in Tekirdağ for C. lucerna species, Kapıdağ Peninsula for L. cavillone species and Marmara Island for E. gurnardus species. According to the depth, the abundance (CPUE)
of the gurnard species has changed. It was found that C. lucerna and L. cavillone
were more abundant at depths of 50-100 m, deeper than 100 m for E. gurnardus.

Anahtar Kelimeler

Lepidotrigla cavillone, Eutrigla gurnardus, Sea of Marmara, Chelidonichthys lucerna, lenght-weight relationship, catch per unit effort

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