Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/55696
Title: Stock assessment of Indian squid, Uroteuthis (Photololigo) duvaucelii (d'Orbigny [in Férussac & d'Orbigny], 1835) from south-western Bay of Bengal
Authors: Chhandaprajnadarsini, E M
Rudramurthy, N
Sethi, S
Kizhakudan, S J
Sivdas, M
Keywords: Exploitation rate;Spawning stock biomass;Uroteuthis (Photololigo) duvaucelii
Issue Date: Nov-2020
Publisher: NISCAIR-CSIR, India
Abstract: Stock assessment of the Indian squid Uroteuthis (Photololigo) duvaucelii off north Tamil Nadu coast from commercial trawl landings was studied during the period 2012-2016. The species is mainly caught by trawl net and the annual average landing of the species was 563.3 t contributing to 2 % to the total trawl landing along north Tamil Nadu coast. L∞, K and t0 were estimated as 260 mm, 0.84 yr-1 and -0.105 yr, respectively. Total mortality rate (Z), Natural mortality rate (M), and Fishing mortality rate (F) were 4.43 yr-1, 1.67 yr-1 and 2.78 yr-1, respectively. tmax was estimated to be 3.47 yr. The length at first capture (Lc50 = 62 mm) estimated by Length converted catch curve method was found to be lower than Length at first maturity (Lm50 = 80 mm). Furthermore, Ecurr (current exploitation rate) was found be on higher side than the Emax (0.48) and E0.1 (0.40) which indicates that the fishery is in overexploited stage. Thompson and Bell prediction model showed that a marginal decrease (20 %) in current level of exploitation would help in regeneration of stock for long term sustainability of the resources as well as in achieving maximized economic return.
Page(s): 1750-1757
URI: http://nopr.niscair.res.in/handle/123456789/55696
ISSN: 2582-6727 (Online); 2582-6506 (Print)
Appears in Collections:IJMS Vol.49(11) [November 2020]

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