بررسی شاخص مطلوبیت زیستگاه سگ ماهی جویباری Oxynoemacheilus bergianus (Derjavin, 1934) در رودخانۀ توتکابن (از سرشاخه های حوزۀ سفیدرود)

نوع مقاله: مقاله علمی - پژوهشی

نویسندگان

1 دانشگاه گیلان

2 دانشیار گروه شیلات دانشگاه گیلان

3 استادیار گروه شیلات دانشگاه تهران

چکیده

در اجرای طرح‌های حفاظت از اکوسیستم‌های آبی و ماهیان، وجود دانش کافی دربارة نیازهای زیستگاهی گونه‌های آبزی اهمیت بسزایی دارد. بنابراین، مطالعۀ حاضر با هدف شناخت ترجیح زیستگاهی و شاخص-های مطلوبیت ویژگی‌های زیستگاهی گونه سگ ماهی جویباری (Oxynoemacheilus bergianus) در محدودۀ پراکنش آن در رودخانۀ توتکابن انجام شد. برای بررسی ویژگی‌های زیستگاهی این گونه، فراوانی این ماهی و متغیرهای زیستی، شامل ارتفاع، عمق، عرض، سرعت جریان، قطر متوسط سنگ و دما با نمونه برداری از 13 ایستگاه و با سه تکرار از پایین دست بسمت بالادست رودخانه توتکابن در آبان-ماه 1392بررسی شد و محدوده زیستگاه انتخابی برای این گونه بدست آمد. با توجه به نتایج بدست آمده، شاخص‌های مطلوبیت زیستگاهی این گونه ارتفاع 175-150 متر، سرعت در دامنۀ 56/0-48/0متر بر ثانیه، قطر سنگ بستر در دامنۀ 25-20 سانتی‌متر، عمق در دامنۀ 32-24 سانتی‌متر، عرض از رودخانه 7-2/4 متر و دمای18-16درجۀ سانتیگراد قرار داشت. وجود این شرایط باشاخص مطلوبیت 801/0 نشان می‌دهد که رودخانۀ توتکابن برای گونۀ سگ ماهی جویباری زیستگاهی بسیار مناسب می‌باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Determination of habitat suitability index of spined loach Oxynoemacheilus bergianus (Derjavin, 1934) from Totkabon River (a tributary of Sefidrud River basin)

نویسنده [English]

  • Hadi Asadi 1

چکیده [English]

In fisheries and protection programs of aquatic ecosystems, knowledge on habitat requirement of aquatic animals plays important role. Hence, this study was conducted to investigate the habitat preference and suitability indexes of habitat features and habitat suitability index (HSI) of Oxynoemacheilus bergianus in its distribution range in the Totkabon River. To study the habitat characteristics of this species in this River, its abundance and habitat variables, including elevation, depth, width, flow velocity, average diameter of substrate stones and water temperature at 13 stations from the downstream to upstream were examined during November 2013. According to the results, the suitability index of environmental features of this species were altitudes ranging 150-175 meters asl, velocity in range 0.48-0.56 m/s, with average diameter beds stone in range 20-25 cm, depths in range 24-34 cm, river width 4/2-7 m and with temperature in range 16-18°C. In this study, three variable height and depth of factors were associated with the abundance of this species. Presence of these conditions with HIS of 0.801 indicates that Totkabon River is very good habitat for O.bergianus.

کلیدواژه‌ها [English]

  • habitat variables
  • Habitat selectivity
  • Oxynoemacheilus bergianus
  • The south Caspian Sea basin
1.Abdoli, A. 2000. The inland water fishes of Iran. Iranian Museum of Nature and
Wildlife, Tehran, 378p. (In Persian)
2.Ahmadi-Nedushan, B., ST-Hilare, A., Berube, M., Robichaud, E., Thiemonge,
N., and Bobeea, B. 2006. A review of statistical methods for the evaluation of
aquatic habitat suitability for instream flow assessment. River Research and
Applications. 22: 503-523.
3.Beamish, F.W.H., Sa-ardrit, P., and Tongnunui, S. 2006. Habitat characteristics
of the cyprinidae in small rivers in Central Thailand. Environmental Biology of
Fish, 76: 237–253.
4.Bovee, K.D. 1982. Aguide to stream habitat analysis using theinstream flow
incremental methodology. Washington, DC: U.S. Fish and Wildlife Service.
FWS/OBS-82/26.
5.Bovee, K.D. 1986. Development and evaluation of habitat suitability criteria for
use in the instream flow incremental methodology. Instream Flow Information
Paper 21, U.S. Fish and Wildlife Service Biological Report, 86(7): 1–235.
6.Coad, B. 2014. Fresh water fishes of Iran. Available from www. Briancoad.com.
Accessed 1st. April 2014.
7.Gorman, O.T., and Karr, J.R. 1978. Habitat structure and stream fish
communities. Ecology, 59: 507-515.
8.Guay, J.C, Boisclair, D., Rioux, D., Leclerc, M., Lapointe, M., and Legendre, P.
2000. Development and validation of numerical habitat models for juveniles of
Atlantic salmon (Salmosalar). Canadian Journal of Fisheries and Aquatic
Sciences, 57: 2065-2075.
9.Hasanli, A.M. 1999. Diverse methods to water measurement (Hydrometry).
Shiraz University Publication. 265p. (In Persian)
10.Jowett, I.G., Parkyn, S.M., and Richardson, J. 2007. Habitate characteristics of
crayfish (Paranephoves Planifrons) in New Zeeland streams using generalizied
additive models (GAMs). Hydrobiologia.
11.Lotfi, A. 2012. Guideline on rapid assessment of environmental features of
rivers. Environment Protection Department of Iran Publication. 120p. (In
Persian)
12.Mahdavi, M. 2011. Applied Hydrology. Tehran: Univercity of Tehran
publication (2nd ed.). 342p. (In Persian)
13.Naderi, M., and Abdoli, A. 2004. Fish Species Atlas of SouthCaspian Sea Basin
(Iranian Waters). Iranian FisheriesResearch Organization, Tehran: 81p.
14.Orth, M. 1988. Use of habitat guilds of fishes to determine in stream flow
requirements. North American Journal of Fisheries Management, 8: 399-409.
15.Rifflart, R., Carrel, G., Coarer, Y., and Fontez, B.N.T. 2009. Spatio-temporal
patterns of fish assemblages in a large regulated alluvial river. Freshwater
biology, 54: 1544-1559.
16.Rosenfeld, J. 2003. Assessing the habitat requirement of stream fishes: An
overview and evaluation of different approaches. Transaction of the American
Fisheries Society, 132: 953-968.
17.Pati, A.K., and Agrawal, A. 2002. Studies on the behavioural ecology and
physiology of a hypogean loach, Nemacheilusevezardi, from the Kotumsar
Cave, India. Current Science, 83(9): 1112-1116.
18.Porter, M.S., Rosenfeld, J., and Parkinson, E.A. 2000. Predictive models of fish
species distribution in the Blackwater drainage, British Columbia. North
American Journal of Fisheries Management, 20(2): 349-359.
19.Tabatabaie, S.N., Hashemzade, A., Eagderi, S., and Zamani Faradonbe, M.
2014. Determinative factors in habitat preference of Paracobitisiranica
(Nalbant and Bianco 1998) in Kordan River, Namak lake watershed. Journal of
Aquatic ecoclogy, 3(4): 1-9. (In Persian)
20.Vlach, P., Dusek, J., Svatora, M., and Moravec, P. 2005. Fish assemblage
structure, habitat and microhabitat preference of five fish species in a small
stream. Folia zoological, 54(4): 421-431.
21.Vinagre, C., Fonseca, V., Cabral, H., and Costa, M.J. 2006. Habitat suitability
index models for the juvenile soles, Soleasolea and Soleasenegalensis, in the
Tagus estuary: Defining variables for species management. Fisheries research
82: 140-149.