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Title Codend Mesh Selectivity of Uroteuthis (Photololigo) duvauceli (d' Orbigny, 1848)
 
Names Madhu, V.R.
Meenakumari, B.
Panda, S.K.
Date Issued 2011 (iso8601)
Abstract The Indian squid, Uroteuthis (Photololigo) duvauceli (d'Orbigny, 1848) is an important resource exploited bv trawlers along the northwest coast of India. The size selectivity for this species in two tr wl systems viz:semi-pelagic and bottom trawls and in four mesh "sizes (40, 50, 60 and 70 mm) was estimated using covered codend method. The L 251 L50' L,5' selection
range, selection factor and selection ratio for each codend were estimated. The L50 values
of Uroteuthis (PhotololigoJ duvauceli for the 40 and 60 mm diamond mesh codend attached
to the bottom trawl were 7.90 ± 0.16 and 12.02 ± 0.21 em dorsal mantle length (DML) respectively and the selection factors worked out to be 1.98 and 2.00. The L 50 values of Uroteuthis (Photololigo) duvauceli for the 50 and 70 mm diamond mesh codend attached to
the semi-pelagic trawlnet was 9.38 ± 0.12 and 16.36 ± 0.19 em DML respectively. he selection factors derived were 1.88 and 2.34 respectively for 50 and 60 mm mesh size. In codend mesh sizes of 40 and 50 mm, 65.78 and 80.39% of the individuals caught respectively were below the size at first maturity. In 60 mm mesh size, 40.07% of the individuais was below the size
at first maturity while in 70 mm mesh size all the individuals caught were below the length
at first maturity.
Genre Article
Topic Codend
Identifier fishery technology 2011: 48(1), 33-40