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| Field | Value |
| Title | Trawl selectivity on Johnius dussumieri (Cuvier, 1830) along Gujarat, northwest coast of India |
| Names |
Madhu, V.R.
Panda, S.K. Meenakumari, B. |
| Date Issued | 2013 (iso8601) |
| Abstract | The codend selectivity of Johnius dussumieri, an important resource targeted by trawlers along Gujarat coast was studied. Covered codend method was used to derive the selection parameters of J. dussumieri using a 40 mm diamond mesh codend. Stacked haul method was used to derive the selection parameters which were utilized for deriving the selectivity estimates. The data on the escapement through experimental codend collected from 6 hauls were used for the analysis. The length at 50% retention (L50)±SE of the species was derived as 7.55 ±0.12 cm. The selection range was worked out as 3.41 ±0.18 cm, selection factor as 0.19 and the selection ratio as 0.45. Considering the length at first maturity to be 122 mm, the optimum mesh size required in the codend (diamond mesh) for conservation of this species was found to be 64.2 mm. |
| Genre | Article |
| Topic | trawl codend selectivity |
| Identifier | Fishery Technology 2013: 50 (2), 121-125 |