Reproductive biology of the commercially important Uroteuthis (Photololigo) duvaucelii (d’ Orbigny [in 1835) off Mangalore, south-west coast of India

Uroteuthis (Photololigo) duvaucelii is one of the commercially important inshore squid resources off the south-west coast of India. Length-weight relationship for this species indicated no significant difference between the sexes and hence, the relationship for both the sexes was represented with the common equation W = 0.4624 L2.1158. U. (P.) duvaucelii spawned throughout the year with peak spawning in May. Absolute fecundity ranged from 1,545 to 13,585 eggs with an average of 7,554 eggs. Size at first maturity indicated that females matured earlier at 70 mm DML (dorsal mantle length) whereas males matured little later at 90 mm DML. Males were observed to be dominant during most of the study period with overall male to female ratio of 1:0.93. Seasonal and size dependent variations in sex ratio were distinct

Finfish constituents of trawl low value by-catch off Mangalore

Trawling remains a controversial method of fishing due to the poor selectivity of trawl net and catching of hugequantity and diversity of non target fishes. By-catch is recognised as an unavoidable portion of fish catch but quantity variesaccording to the type of gear operated. FAO has considered the resource damage due to discarding of by-catch as serious issue.Mangalore fisheries harbour is one among the major fishing harbours of Karnataka state with its significant contribution tothe Trawl landings. The study was conducted to assess the recourse damage due to indiscriminate fishing and landing of juveniles of commercially important species in low value by-catch due to smaller size and improper handling. The quantity of lowvalue by-catch was estimated from the landings of single-day and multi-day trawler landings for the period of August 2012 toMay 2013. The quantity of low value by-catch (trash fish) generated by trawlers of Mangalore was estimated as 32,426 t (19%of the total trawl catch). A total 121 species of finfishes belonging to 55 families have been identified constituting the low valueby-catch. Order Perciformes contributed 61.16 per cent (74 species) to the total number of species, followed by Clupeiformesand other groups, whereas the family Carangidae contributed 11.57 per cent (14 species) to the total number of species, followedby Engraulidae and other families. Presence of wide diversity of finfishes in low value by-catch showed an alarming signal of fisheries resource damage

Assessment of the status of empowerment of fisherwomen in Coastal Karnataka

Assessment of the status of empowerment of fisherwomen in Coastal Karnatak

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Not AvailableUroteuthis (Photololigo) duvaucelii is one of the commercially important inshore squid resources off the south-west coast of India. Length-weight relationship for this species indicated no significant difference between the sexes and hence, the relationship for both the sexes was represented with the common equation W = 0.4624 L2.1158. U. (P.) duvaucelii spawned throughout the year with peak spawning in May. Absolute fecundity ranged from 1,545 to 13,585 eggs with an average of 7,554 eggs. Size at first maturity indicated that females matured earlier at 70 mm DML (dorsal mantle length) whereas males matured little later at 90 mm DML. Males were observed to be dominant during most of the study period with overall male to female ratio of 1:0.93. Seasonal and size dependent variations in sex ratio were distinct.Not Availabl

Reproductive biology of Nematalosa nasus (Bloch, 1795) off Mangalore coast, Karnataka

Nematalosa nasus is one of the important species comes under shads belongs to the clupeids group, clupeiod fisheries is one of the major fisheries in Indian country. In the present study, the complete reproductive biology with breeding seasonality of N. nasus along Mangalore coast studied for the first time. Six maturity stages were described macroscopically (male and female) and microscopically (female) throughout the maturation cycle. The spawning season in Mangalore lasts from September (2013) to April (2014), with peak spawning activity in October (2013) and November (2013). The size at first maturity was estimated to be 162 mm for both male and female respectively. The size frequency distribution of oocytes (ova diameter) provided evidence for its multiple spawning. The batch fecundity of this species was estimated between 1,02,093 to 8,32,129 eggs per individual. GSI indicated protracted spawning which extend from September (2013) to April (2014). The overall sex ratio exhibited equally was 1:1 (Male : Female)

Not Available

Not AvailableNematalosa nasus is one of the important species comes under shads belongs to the clupeids group, clupeiod fisheries is one of the major fisheries in Indian country. In the present study, the complete reproductive biology with breeding seasonality of N. nasus along Mangalore coast studied for the first time. Six maturity stages were described macroscopically (male and female) and microscopically (female) throughout the maturation cycle. The spawning season in Mangalore lasts from September (2013) to April (2014), with peak spawning activity in October (2013) and November (2013). The size at first maturity was estimated to be 162 mm for both male and female respectively. The size frequency distribution of oocytes (ova diameter) provided evidence for its multiple spawning. The batch fecundity of this species was estimated between 1,02,093 to 8,32,129 eggs per individual. GSI indicated protracted spawning which extend from September (2013) to April (2014). The overall sex ratio exhibited equally was 1:1 (Male : Female).Not Availabl

Not Available

Not AvailableAssessment of the status of empowerment of fisherwomen in Coastal KarnatakaNot Availabl

Not Available

Not AvailableTrawling remains a controversial method of fishing due to the poor selectivity of trawl net and catching of hugequantity and diversity of non target fishes. By-catch is recognised as an unavoidable portion of fish catch but quantity variesaccording to the type of gear operated. FAO has considered the resource damage due to discarding of by-catch as serious issue.Mangalore fisheries harbour is one among the major fishing harbours of Karnataka state with its significant contribution tothe Trawl landings. The study was conducted to assess the recourse damage due to indiscriminate fishing and landing of juveniles of commercially important species in low value by-catch due to smaller size and improper handling. The quantity of lowvalue by-catch was estimated from the landings of single-day and multi-day trawler landings for the period of August 2012 toMay 2013. The quantity of low value by-catch (trash fish) generated by trawlers of Mangalore was estimated as 32,426 t (19%of the total trawl catch). A total 121 species of finfishes belonging to 55 families have been identified constituting the low valueby-catch. Order Perciformes contributed 61.16 per cent (74 species) to the total number of species, followed by Clupeiformesand other groups, whereas the family Carangidae contributed 11.57 per cent (14 species) to the total number of species, followedby Engraulidae and other families. Presence of wide diversity of finfishes in low value by-catch showed an alarming signal of fisheries resource damage.Not Availabl