Difference between night and day trawler fishing in the northern waters of Oman Sea (Sistan and Baluchestan Province)

Document Type : scientific research article

Authors

1 Corresponding Author, Offshore Fisheries Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Chabahar, Iran

2 Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran.

Abstract

In this study, sampling of commercial vessels of Afsoon 1 was carried out in July 2020, at a distance of more than 10 miles in longitude24 50 to 24 60 and latitude 61 03 to 61 05. At the time of the study, trawl fishing was done 13 times at different times, 8 times during the day and 5 times at night. The total catch during the study period was 12306 kg and 8720 kg were caught during the day (about 71%) and 3586 kg at night (about 29%). The average catch per fishing effort (catch per hour) of the target species was 201 kg (67%) during the day and 63 kg (33%) at night, and the average catch per fishing effort (catch per hour) discard species were 71 kg (28%) during the day and 100 kg (59%) at night (P <0.05). The mean catch per fishing effort (catch per hour) of bycatch fishing species at 18 kg during the day and 9 kg at night were not significantly different from each other (P> 0.05). The Trichiurus lepturus species (64%) had the highest catch of target species, Epinephelus coioides species (53%) had the highest catch of bycatch fishing species and Ray fish (88%) had the highest catch of discard species. The Siganidae and Megalaspis cordyla species, appear to be active during the day and pipe fish, Anguiliformes and Belonidae species of night active.

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References

1.FAO. (2020). FAO Global Capture Production database updated to 2020- Summary information. 54p.
2.Steadman, D., Thomas, J., Villanueva, V., Lewis, F., Pauly, D., Palomares, M., Bailly, N., Levine, M., Virdin, J., Rocliffe, S., & Collinson, T. (2021). New perspectives on an old fishing practice: Scale, context and impacts of bottom trawling. CEA Consulting and Fauna, Flora International. Report 2021. 44p.
3.WWF. (2020). World Wide Fund for Nature (Formerly World Wildlife Fund). Baltic Ecoregion Programme. Ulriksdals Slott, 170 81 Solna, Sweden. 44p.
4.Jenning, S., Kasier, M., & Reynold, J. (2000). Marine Fisheries Ecology. Black well Science. 391p.
5.Alverson, D. L., Freeberg, M. H., Murawaski, S. A., & Pope, J. G. (1994). A global assessment of fisheries bycatch and discards. FAO Fisheries technical paper no 339. Rome, FAO. 235p.
6.Pérez Roda, M. A. (ed.), Gilman, E., Huntington, T., Kennelly, S. J., Suuronen, P., Chaloupka, M., & Medley, P. (2019). A third assessment of global marine fisheries discards. FAO Fisheries and Aquaculture Technical Paper No. 633. Rome, FAO. 78p. License: CC BY-NC-SA 3.0 IGO.
7.Mohammadkhani, H., Taghavi Motlagh, A., Attaran, G., Khodami, Sh., & Darianbard, G. (2001). Evaluation of the demersal reserves of the bottom trawl net by the swept area method in the waters of the Sea of Oman (10-100 meters), the waters of Sistan and Baluchistan province. Offshore Fisheries Research Center. 208p.
8.Daryanbard, G., Hosseini, A., & Valinasab. (2013). Determining the amount of biomass of benthic fish by the swept area method in Oman Sea (coasts of Sistan and Baluchistan). Iran Fisheries Research Institute. 161p.
9.Dehghani, R., Valinasab, T., Kamali, A., Darvishi, M., Behzadi, S., Asadi, H., & Akbari, H. (2004). Monitoring of water reservoirs in Hormozgan province using the swept area method. Persian Gulf and Sea of Oman Ecology Research Institute. 89p.
10.Valinasab, T. (2018). Determining the amount of biomass of benthic fish by the swept area method in the waters of the Persian Gulf and the Sea of Oman. 328p.
11.Valinasab, T. (2018). Determining the amount of biomass of benthic fish by the swept area method in the waters of the Persian Gulf and the Sea of Oman. (surveys from 2018 to 2019). 227p.
12.Valinasab, T. (2016). Determining the amount of biomass of benthic fish by the swept area method in the waters of the Persian Gulf and the Sea of Oman. (2014-2016). Fisheries Science Research Institute of the country. 356p.
13.Valinasab, T., Khurshidian, K., Parsamanesh, A., Kamrani, A., & Dehghani Pashtroudi, R. (2001). Estimating the benthic fish of the Persian Gulf (10 to 50 meters deep) using the swept area method (1375-1373), Iran Fisheries Research Institute, 121p.
14.Valinasab, T., Daryanbard, R., Ajir, M.T., Momeni, M., Marbarzi, A., & Safi Khani, H. (2010). Determining the amount of biomass of benthic fish by the swept area method in the waters of the Persian Gulf and the Sea of Oman. Final report, Iran Fisheries Research Institute, 384p.
15.Abbaspour Naderi, R. (2016). Investigating ten-year trends of bottom aquatics in Oman Sea and predicting exploitation pattern (Coasts of Sistan and Baluchistan province). PhD thesis of Gorgan University of Agriculture and Natural Resources. 141p.
16.Hosseinzadeh, H., Vahabnejad, A. Dehghani, R., Ansari, H., Vali Nasab, T., Behzadi, S., Sarpanah, A., & Ishaqzadeh, Kh. (2018). Changes in the catch composition of the Carangidae fish family during the dark and light periods using nets. Trawl applied ichthyology researches. The seventh period and the third issue. 93-108.
17.Fischer, W., & Bianchi, G. (1984). FAO Species Identification Sheets for Fisheries Purposes, Western Indian Ocean, vols. I-V, FAO, Rome, Italy. 210p.
18.Asadi, H., & Dehghani Pashtroudi, R. (1996). Persian Gulf and Sea of Oman Fish Atlas. Iranian Fisheries Research and Training Organization. 226p.
19.El-Bokhty, E., El-Ganainy, A., Magdy, T., Khalil, M., El-Rahman, F., & Saber, M. (2021). Effect of diel variation on trawl fishery-catch rates in the Gulf of Suez, Red Sea, Egypt. Egyptian Journal of Aquatic Biology and Fisheries. 25 (6), 503-512.
20.Zar, J. H. (2010). Biostatistical Analysis (5th edition), Pearson highered. 945p.
21.Pérez Roda, M. A. (ed.), Gilman, E., Huntington, T., Kennelly, S. J., Suuronen, P., Chaloupka, M., & Medley, P. (2019). A third assessment of global marine fisheries discards. FAO Fisheries and Aquaculture Technical Paper No. 633. Rome, FAO. 78p. Licence: CC BY-NC-SA 3.0 IGO.
22.Cashion, T., Al-Abdulrazzak, D., Belhabib, D., Derrick, B., Divovich E., Moutopoulos, D., Noël, S., Palomares, M., The, L., Zeller, D., & Pauly, D. (2018). Reconstructing global marine fishing gear use: Catches and landed values by gear type and sector. Fisheries Research. 206 (1) 57-64. https://doi.org/ 10.1016/j.fishres.2018.04.010.
23.King, M. (1995). Fisheries biology & assessment and management. Fishing news press, 340.
24.Ryer, C. H., Rose, C. S., & Iseri, P. J. (2010). Flatfish herding behavior in sweeps response to trawl sweeps: a comparison of diel responses to conventional and elevated sweeps. Fish. Bull. 108, 145-154.
25.Hart, T. D., Julia, E. R., Wakefield, W. W., & Heppell, S. S. (2010). Day and night abundance, distribution, and activity patterns of demersal fishes on Heceta Bank, Oregon. Fishery Bulletin. 108 (4), 45-57.
26.Bochenek, E. A., & Powell, E. (2021). Time of day affects squid catch in the U.S. Illex illecebrosus squid fishery. Regional Studies in Marine Science. 44 (1), 1-6. https://doi.org/10.1016/ j.rsma.2021.101666.
27.Duun, M. R. (2006). A review of experimental methods for determining catchability for trawl surveys. New Zealand Fisheries Assessment Report 2006/51. 31p.
28.Walsh, S. J., & Hickey, W. M. (1993). Behavioral reactions of demersal fish to bottom trawls at various light conditions. ICES Mar. Sei. Symp. 196, 68-76.
29.Francis, R. I. C. C., Hurst, R. J., & Renwick, J. A. (2003). Quantifying annual variation in catchability for commercial and research fishing. Fish. Bull. 101, 293-304.
30.Hashemi, S. A. (2014). Evaluation of fish stock and production in Shadgan wetland in Khuzestan province. PhD thesis of Gorgan University of Agriculture and Natural Resources. 95p.
31.Denderen, P. D. (2015). Ecosystem Effects of Bottom Trawl Fishing. PhD thesis, Wageningen University, Wageningen, 182p.
Journal of Utilization and Cultivation of Aquatics
Volume 12, Issue 4
January 2024
Pages 51-61

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