Pelagic longline fishery for Albacore (Thunnus alalunga ) in the Mediterranean Sea off Egypt

Mohamed Hosny Gabr; Alaa Eldin El-Haweet

Makale detayları

Pelagic longline fishery for Albacore (Thunnus alalunga ) in the Mediterranean Sea off Egypt

Yazarlar:

Mohamed Hosny Gabr | Alaa Eldin El-Haweet

Yayıncı:

Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi:

Turkish Journal of Fisheries and Aquatic Sciences 2012 Vol.12 Issue 4

Belge Tipi:

Makale

Yayın Tarihi:

7/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000838250

Sıklık:

Üç Aylık

pISSN:

1303-2712

Anahtar kelimeler:

Özet:

 

This study highlighted the occurrence of a pelagic longline fishery targeting albacore in the Eastern Mediterranean Sea off Egypt. Species selectivity of the fishing method was assessed. Catch per unit effort "CPUE", size frequency and lengthweight  relationship were estimated for the the target species. This fishing method was found to be highly selective for albacore, where its catch represented about 93.5 % of the total landed catch. The major by-catch species were swordfish  Xiphias gladius (2.5 %) and the little tunny Euthynnus alletteratus (2.4 %). Skipjack Katsuwonus pelamis, dolphinfish Coryphaena hippurus, Bigeye thresher Alopias superciliosus, and oilfish Ruvettus pretiosus represented collectively, 1.5 % of the total landed catch. The fork length of albacore ranged from 54 to 138 cm, with an average of 79.1 ± 7.2 cm. Total weight ranged from 4 t 40 kg with an average of 8.8 ± 7.2 kg. The length-weight relationship was determined to be W = 5.26 x 10-5 L 2.75 (W in kg, L in cm). The CPUE for albacore ranged from 7 to 22 fish / 1000 hooks for the different fishing trips, with an average CPUE of 12 fish / 1000 hooks (SE ±4.4). 	 	 		 .

 

This study highlighted the occurrence of a pelagic longline fishery targeting albacore in the Eastern Mediterranean Sea off Egypt. Species selectivity of the fishing method was assessed. Catch per unit effort "CPUE", size frequency and lengthweight  relationship were estimated for the the target species. This fishing method was found to be highly selective for albacore, where its catch represented about 93.5 % of the total landed catch. The major by-catch species were swordfish  Xiphias gladius (2.5 %) and the little tunny Euthynnus alletteratus (2.4 %). Skipjack Katsuwonus pelamis, dolphinfish Coryphaena hippurus, Bigeye thresher Alopias superciliosus, and oilfish Ruvettus pretiosus represented collectively, 1.5 % of the total landed catch. The fork length of albacore ranged from 54 to 138 cm, with an average of 79.1 ± 7.2 cm. Total weight ranged from 4 t 40 kg with an average of 8.8 ± 7.2 kg. The length-weight relationship was determined to be W = 5.26 x 10-5 L 2.75 (W in kg, L in cm). The CPUE for albacore ranged from 7 to 22 fish / 1000 hooks for the different fishing trips, with an average CPUE of 12 fish / 1000 hooks (SE ±4.4). 	 	 		 .

Makale detayları

Pelagic longline fishery for Albacore (Thunnus alalunga ) in the Mediterranean Sea off Egypt

Yazarlar:

Mohamed Hosny Gabr | Alaa Eldin El-Haweet

Yayıncı:

Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi:

Turkish Journal of Fisheries and Aquatic Sciences 2012 Vol.12 Issue 4

Belge Tipi:

Makale

Yayın Tarihi:

7/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000838250

Sıklık:

Üç Aylık

pISSN:

1303-2712

Eastern Mediterranean

Longline

Albacore

Thunnus alalunga

By-catch

Selectivity

CPUE

Sayı

Makale detayları

Yazarlar: Mohamed Hosny Gabr | Alaa Eldin El-Haweet

Yayıncı: Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi: Turkish Journal of Fisheries and Aquatic Sciences 2012 Vol.12 Issue 4

Belge Tipi: Makale

Yayın Tarihi: 7/2012

Belge Dili: Türkçe

Document ID (Org No.): 2000838250

Sıklık: Üç Aylık

pISSN: 1303-2712

Sayı

Yazarlar:

Mohamed Hosny Gabr | Alaa Eldin El-Haweet

Yayıncı:

Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi:

Turkish Journal of Fisheries and Aquatic Sciences 2012 Vol.12 Issue 4

Belge Tipi:

Makale

Yayın Tarihi:

7/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000838250

Sıklık:

Üç Aylık

pISSN:

1303-2712