کاربرد مدل لاجیت در شناسایی عوامل موثر دربهره برداری غیرقانونی ذخایر ماهیان تجاری دریای خزر، استان گلستان

نوع مقاله : بوم شناسی

نویسندگان

گروه شیلات، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی، گرگان، ایران

چکیده

بهره ­برداری بی ­رویه آبزیان تجاری به ­خصوص ماهیان خاویاری به­ عنوان ارزشمندترین ماهیان دریای خزر، آن ­ها را در معرض خطر انقراض قرار داده است. این مطالعه با استفاده از روش پیمایش میدانی و به ­کمک ابزار پرسشنامه و مراجعه پرسشگر به مناطق فعالیت صیادان در استان گلستان انجام شد. داده­ های مورد نیاز با توزیع تعداد 172 پرسشنامه بین جامعه صیادان قانونی و غیرقانونی به ­دست آمد و پرسشنامه حاوی سوالات مرتبط با علل اجتماعی، اقتصادی، صیادی و حفاظت شیلاتی دخیل در وقوع بهره ­برداری غیرقانونی ذخایر بود. پس از تایید روایی و پایایی پرسشنامه ­ها، داده ­ها با استفاده از مدل لاجیت مورد تجزیه و تحلیل قرار گرفتند. نتایج نشان داد که عوامل متعددی ازجمله: فاصله محل سکونت تا دریا، نوع شناور صیادی، نوع مالکیت صید، زمان و عمق صید تاثیر معنی­ داری در وقوع صید غیرقانونی داشتند. بهره ­برداران غیرقانونی در استان گلستان عمدتاً در اعماق کم به صید ماهیان خاویاری با استفاده از ادوات صیادی غیراستاندارد پرداخته و تلاش صیادی آن­ ها نیز در مقایسه با صیادان قانونی عمدتاً در طول شب رخ داد. به­ طورکلی، احتمال وقوع صید غیرقانونی در دریای خزر با مجموعه ­ای از عوامل اجتماعی، اقتصادی، حفاظتی و شیلاتی مرتبط است.

کلیدواژه‌ها

عنوان مقاله [English]

Using Logit model to identify factors involved in illegal fishing of commercial fish stocksin the Caspian Sea, Golestan Province

نویسندگان [English]

  • Seyed Mostafa Aghilinejhad
  • Saeid Gorgin
  • Ramtin Joolaie
  • Rasoul Ghorbani
  • seyed yousef paighambari
  • Jahangir Mohammadi
Department of Fisheries, Faculty of Fisheries and Environment, University of Agricultural Sciences and Natural Resources, Gorgan, Iran
چکیده [English]

Excessive exploitation of commercial aquatic resources, especially valuable Caspian sturgeons, has exposed these living resources to high extinction risks. This study was undertakenusing field-based surveysacross fishing zones in Golestan province and by designinga questionnaire. Data were collected through the distribution of 172 questionnaires among fishermen communities to answer questions related to social, economic, fisheries and conservation factors which are likely to contribute in the occurrence of illegal fishing. Following the evaluation of validity and reliability of the questionnaire, data were analyzed using logit model. Results indicated that factors such as home distance to the sea, type of fishing vessels, type of catch ownership, time and depth of fishing activity had significant effect in the incidence of illegal fishing. Fishing efforts of illegal fishermen for sturgeon harvest in Golestan province were mostly occurred during night and in shallow depths, and using non-standard fishing equipment. In conclusion, it appears that the probability of the occurrence of illegal fishing is in association with a range of social, economic, fisheries and conservation factors. 

کلیدواژه‌ها [English]

  • Fisheries ecology
  • Illegal exploitation
  • South-eastern Caspian Sea
  • Sturgeon
  • Logit Model
  • Fisheries management

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فصلنامه محیط زیست جانوری
دوره 9، شماره 4
دی 1396
صفحه 269-276

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