Study of the fish scape percentage from the beach seine bag - case study of Azadi Fishing Cooperative (Larim Beach, Mazandaran)

Study of the fish scape percentage from the beach seine bag - case study of Azadi Fishing Cooperative (Larim Beach, Mazandaran)

Authors

  • Hoda Alizadeh Amiri Fishing and Exploitation Department, College of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran, Iran, Islamic Republic of
  • Saeid Gorgin Fishing and Exploitation Department, College of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran, Iran, Islamic Republic of
  • Toraj Valinasab Iran Fisheries Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran, Iran, Islamic Republic of
  • Aminolah Taghavimotlagh Iran Fisheries Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran, Iran, Islamic Republic of
  • Rasoul Ghorbani Fishing and Exploitation Department, College of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran, Iran, Islamic Republic of
  • Ali Jalali Management of sturgeon affairs in Golestan province, Gorgan, Iran, Iran, Islamic Republic of

Keywords:

Catch composition and variety Scape rate Beach seine Caspian Sea

Abstract

Introduction: The vulnerability of aquatic animals to fishing varies according to the behavioral phenotypes of individuals in any aquatic species, but there is no basic information in this regard. The aim of the study was to find the percentage of fish escape
from the bag of beach seine located on the southern shores of the Caspian Sea.
Materials & Methods: For this purpose, a number of pockets with mesh size of 15 mm (opening mesh) and dimensions of 4 × 4 meters fixed behind the bag the beach seine in Larim region (Mazandaran Province) in the fishing season of 2020-2021 and recorded
with an underwater camera.
Results: The results showed that during the fishing season, most R. kutum, C. carpio, L. aurata and Alosa spp. were observed in the net bag. In autumn only 5.9% of Alosa spp. and in winter 28% and 1.3% of L. aurata in autumn and 12.3% in winter was observed
in the bag. Also, 17.9% of Neogobius spp. were able to escape from the net in autumn and 59.4% in winter. In the study of the length frequency of the economic fish caught, the results indicate a significant difference in the average of the fishes caught in the net
and pocket (P <0.05).
Conclusion: It seems the high escape percentage of fish, the mesh size used in the beach seines located on the southern shores of the Caspian Sea are suitable.

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Published

2023-02-08

Issue

Vol. 15 No. 1 (2023)

Section

Articles

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