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Reproductive biology of Pharaoh cuttlefish Sepia pharaonis Ehrenberg, 1831 along the Gujarat coast, India

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Title Reproductive biology of Pharaoh cuttlefish Sepia pharaonis Ehrenberg, 1831 along the Gujarat coast, India
 
Creator Pal, M
Kardani, H K
Vase, V K
Sarman, V
Solanki, V
 
Subject Fishery management
Gujarat coast
Ova diameter
Reproductive biology
Sepia pharaonis
 
Description 909-917
Gujarat is a leading maritime state in the production of marine finfish and cephalopods in India. The cephalopods are one
of the major fishery resources along the region having a good domestic and export demand. These resources are exploited
majorly by bottom trawls along the region. Sepia pharaonis contributes nearly 20 % to the cephalopod landings of Gujarat.
However, the fishery and reproductive biology of the cephalopod, Sepia pharaonis is poorly known from the region. The
specimens for biological analysis along with fishing operations and fishing data using a structured questionnaire were
collected from the multi-day trawlers based at the Veraval Fishing Harbour for the period of 2017 – 18. The maximum
observed length (Dorsal Mantle Length (DML)) among all specimens was 361 mm with a mean DML of 239.52 mm
(sample range DML). Sex ratio revealed that the males are dominant over the females (M: F = 1:0.75) in the catch
composition. The size at first maturity was observed at 213.1 mm DML, which is lower than the mean size of the fishery.
The month-wise significant variations (p < 0.05) were observed in the values of GSI and NSI during the study period and
peak values indicate the spawning season of the fishery. The proportion of maturity stages in different months as well as
maturity indices indicates perennial spawning season with peak spawning activity during December – March months. The
ova diameter studies revealed ovum sizes from 0.99 – 14.30 mm (6.52±3.35). The fecundity varied from 1,358 – 6,005 ova
(average = 2,883). The current research study is the maiden attempt along the region and further supports the formulation of
management plans for the sustainable exploitation of the resource.
 
Date 2023-07-11T06:22:04Z
2023-07-11T06:22:04Z
2023-07
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscpr.res.in/handle/123456789/62296
https://doi.org/10.56042/ijms.v51i11.3508
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJMS Vol.51(11) [November 2022]