Survey of fishing products, length frequency and condition factor for trapped Sepia pharaonis (Ehrenberg, 1831) by Gargoor (wire pot) in Bushehr province waters, northern of Persian Gulf

Document Type : Animal science

Authors

1 Department of Fisheries, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

2 Department of Fisheries, Faculty of Agricultural Sciences and Natural Resources, Gonbad Kavous University, Gonbad Kavous, Iran

3 Bushehr Shrimp Research Institute, National Institute of Fisheries Research, Agricultural Research, Education and Promotion Organization, Bushehr, Iran

Abstract

          The purpose of this study was an estimation of the exploitation and also determination of some biological aspects for trapped Pharaoh Cuttlefish by wire pot (Gargoor) in Bushehr province (north of Persian Gulf). The data collection process was carried out from February 22 to April 19, 2017. The landing and yield of caught Pharaoh Cuttlefish by wire pots in Bushehr province, for 12 years, were 354.833 tones and 162.260 kg. km-2. year-1, respectively. The length (mantle length) and weight range of caught Pharaoh Cuttlefish (300 biometeried specimens) were 13-36 (24.62 ± 4.59) cm and 300-4200 (1870 ± 791.61) gr, respectively. Randomization Test and Two Independent Samples Kolmogorov-Smirnov Test were used for comparing the length frequencies, while showed a significant difference in all different parameters of catch; such as soak depth of Gargoors, soak time of Gargoors and types of vessel (p=0.001). The average of condition factor for Pharaoh Cuttlefishes was 1.25 which indicates the favorable living conditions of trapped Pharaoh Cuttlefish by Gargoor. Independent Samples T Test was used for comparing the condition factors, while just showed a significant difference in soak time of Gargoors (p=0.001). The results showed that due to the overlapping and synchronization of the fishing and reproduction season of Pharaoh Cuttlefish in Bushehr province and based on the range of length and weight frequencies of trapped Pharaoh Cuttlefish by wire pots, it can be stated that fishing operation using wire pots is a selective method for Cuttlefish.

Keywords

References

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Journal of Animal Environment
Volume 11, Issue 3
October 2019
Pages 355-362

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