Fishing experiments were carried out in Kotabaru of
Indonesia to determine catching efficiency of double-twisted and triple-twisted
multifilament trammel nets. A total of 10 nets were constructed with the same
dimension and inner-outer mesh sizes (40-mm and 80-mm). Trials covered 160-net
hauls/type with 1-hour submersion time. The shrimps were composed of Penaeus monodon, Penaeus merguensis, Metapenalis
monoserus, Penaeus semiculatus
and Parapenaeopsis sculptilis.
A total of 142.8 kg shrimp comprises 84.46 kg (59.15%) for double-twisted and
58.34 kg (40.85%) for triple-twisted were collected over 16-daytrip sampling
period, indicating double-twisted multifilament trammel net was 45% more
efficient. The average weight of double-twisted (5.25±1.64 kg) was considerably
higher than that of triple-twisted (3.65±1.41 kg) as well as total YPUE of double-twisted (1.056±0.02 kg)
was considerably higher than that of triple-twisted (0.729±0.02 kg) (P<0.05). Some recommendations for
improving performances and efficiency of trammel nets are made, for example, by
inserting the additional bag collector along the lower part of the nets,
placing selvedge between the lead line and the net or using underwater lamps
associated with the net.
weight, double-twisted, triple-twisted, trammel net, YPUE, Kotabaru
Bölüm | Makaleler |
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Yazarlar |
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Yayımlanma Tarihi | 15 Aralık 2017 |
Gönderilme Tarihi | 24 Mayıs 2017 |
Yayımlandığı Sayı | Yıl 2017Cilt: 34 Sayı: 4 |