Age, growth, sex ratio and feeding of Knipowitschia caucasica (Berg, 1916) (Actinopterygii, Gobiidae) in non-native species of Eğirdir Lake (Turkey)

Year 2017, Volume: 30 Issue: 1, 1 - 6, 30.03.2017

Salim Serkan Güçlü Ömer Erdoğan

Abstract

The population structure of
Knipowitschia caucasica (Caucasian dwarf goby) in Lake Eğirdir (Turkey) was studied, using 400 fish
monthly in 2008. Males made up 45.75% (183), females 50.50% (202) and juveniles
3.75% (15) of the population. The length-weight relationship and Von
Bertalanffy growth equation were estimated as W=0.0141*L^2.769
(r=0.7464), W=0.0116*L^2.941 (r=0.8266) and W=0.0129*L^2.8494
(r=0.8039) for females, males and combined sexes, respectively. This species
can be mainly fed with Ochrophyta, Gammarus pulex and Ostracoda
organisms. There is a food
competition among Atherina boyeri, Aphanius anatoliae and K. caucasica that live mainly in coastal areas and share
the same environment. The species has become one of the
dominant fish of lake along with Carassius
gibelio
(non-native), A. anatoliae (native)
vs A. boyeri (non-native).

Keywords

Anatolia, Exotic species, Competition, Population features

References

• Ahnelt H. 1995. Two new species of Knipowitschia Iljin, 1927 (Teleostei: Gobiidae) from Western Anatolia. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut, 92: 155-168. Ahnelt H. 2011. Two new sympatric Knipowitschia species (Teleostei: Gobiidae) from an eastern Mediterranean coastal lake-examples of different dispersal patterns? Zootaxa, 3114: 22-30. Balık S., Ustaoğlu M.R., Sarı H.M., İlhan A., Topkara E.T. 2005. The fish fauna of Yuvarlakçay (Köyceğiz, Muğla). Ege University Journal of Fisheries and Aquatic Sciences, 22 (1-2): 221-223. (In Turkish with English abstract) Balık İ., Çubuk H., Özkök R., Uysal R. 2006. Fish fauna and fisheries in Lake Eğirdir: Changes from 1950s, when Pikeperch (Sander lucioperca (Linnaeus, 1758)) was introduced to today. 1. Balıklandırma ve Rezervuar Yönetimi Sempozyumu, 105-118, Antalya (In Turkish with English abstract). Campbell R.N.B. 1992. Food of an introduced population of pikeperch, Stizostedion lucioperca L. in Lake Egirdir, Turkey. Aquaculture and Fisheries Management, 23: 71-85. Düzgüneş O., Kesici T., Gürbüz F. 1995. İstatistiki Metodlar. Ankara Üniversitesi Ziraat Fakültesi Yayınları, No: 1291, Ankara. 218 p. (In Turkish) Ekmekçi G., Erk’akan F. 1997. Evaluation of changes in Pikeperch Stizostedion lucioperca (L. 1758) population in Eğirdir Lake. Turkish Journal of Zoology, 21: 421-430. Economou A.N., Daoulas C., Psarras T., Barbihri-Tseliki R. 1994. Further data on the reproduction and larval development of Knipowitschia caucasica (Gobiidae). Journal of Fish Biology, 45(2): 360-362. Görmüş M., Çoban H., Caran Ş., Uysal K., Bircan H., Tunç İ.O. 2005. Eğirdir Gölü Batısı Pliyo-Kuvaterner Sedimanları. Türkiye Kuvaterner Semp., İTÜ Avrasya Yer Bilimleri Enst. 205-218. (In Turkish) Güçlü S.S. 2012. Population structure of Killifish, Aphanius anatoliae (Cyprinodontidae) endemic to Anatolia in Lake Eğirdir-Isparta (Turkey), Iranian Journal of Fisheries Sciences, 11(4): 786-795. IUCN. 2013. IUCN Red List of Threatened Species. Available online at www.iucnredlist.org. Accessed in 25.11.2013. Kara F. 1992. Balıkçılık Biyolojisi ve Populasyon Dinamiği. Ege Üniversitesi Su Ürünleri Yüksekokulu Kitapları Serisi, No: 27, Ege Üniversitesi Basımevi, İzmir. 168 p. (In Turkish) Kevrekidis T., Kokkinakis A.K., Koukouras A. 1990. Some aspects of the biology and ecology of Knipowitschia caucasica (Teleostei: Gobiidae) in the Evros Delta (North Aegean Sea). Helgolander Meeresuntersuchungen, 44 (2): 173-187. Kosswig C., Geldiay R. 1952. Eğirdir Gölü balıkları. Balık ve Balıkçılık, İst Üniv. Fen Fak. Hidrobiyoloji Arş. Enst. Yayınları, 3-1: 3-14. Kovačić M. 2005. A new species of Knipowitschia (Gobiidae) from Dalmatia, Croatia. Cybium, 29(3): 275-280. Küçük F. 1998. Isparta İli İçsularında Yayılış Gösteren Tatlısu Balıklarının Sistematik ve Ekolojik Özellikleri Üzerine Araştırmalar. SDÜ. Isparta’nın Dünü, Bugünü, Yarını Sempozyumu, 2 (2): 75-88. (In Turkish) Küçük F., Gülle İ., Güçlü S.S., Gümüş E., Demir O. 2006. Effect on fishery and lake ecosystem of non-native sand smelt (Atherina boyeri RISSO, 1810) in Eğirdir Lake. 1. Balıklandırma ve Rezervuar Yönetimi Sempozyumu, p: 119-128, Antalya. (In Turkish with English abstract) Küçük F., Sarı H.M., Demir D., Gülle İ. 2009. Review of the ichthyofaunal changes in Lake Eğirdir between 1915 and 2007. Turkish Journal of Zoology, 33: 277-286. Miller P.J. 2004. Knipowitschia Iljin, 1927. In: P.J. Miller, (ed.): The Freshwater Fishes of Europe. Vol. 8: Gobiidae. Wiesbaden: AULA-Verlag. pp: 331-337. Nikolsky G. 1980. Theory of fish population dynamics as the biological background for rational exploitation and management of fishery resources. Otto Koeltz Science Publishers, Koenigstein. Özuluğ M., Tarkan A.S., Gaygusuz Ö., Gürsoy Ç. 2007. Two new records for the fish fauna of Lake Sapanca Basin (Sakarya, Turkey). Journal of Fisheries Sciences, 1(3): 152-159. Pietschmann, V. 1933. Drei neue Fisharten aus Kleinasien. Mat. nat. KI. Wien, 70: 21-23. Ricker W.E. 1975. Computation and interpretation of biological statistics of fish populations. Journal of the Fisheries Research Board of Canada, No: 191. 382 p. Sarıhan E. 1970. On the biological and economic changes occurred in the Lake Eğirdir after the transplantation of pikeperch (Lucioperca lucioperca). İstanbul University Publications of the Hydobiological Research Ins. B, VI-3: 3-4. Smith D.G. 2001. Pennak’s freshwater invertebrates of the United States (Porifera to Crustacea). Fourth Edition. John Wiley and Sons Inc. 638 p. Tarkan A.S., Gaygusuz Ö., Acıpınar H., Gürsoy Ç., Özuluğ M. 2006. Length-weight relationship of fishes from the Marmara region (NW-Turkey). Journal of Applied Ichthyology, 22: 271-273. Turan D., Berber S., Topkara E.S., Verep B. 2005. A First record (Knipowitschia longicaudata (Kessler, 1877)) for the fish fauna of Lake Manyas. Turkish Journal of Zoology, 29: 171-176 Neer V.W., Wildekamp R.H., Kucuk F., Ünlüsayın M. 1999. First inland records of the euryhaline goby Knipowitschia caucasica from lakes in Anatolia, Turkey. Journal of Fish Biology, 54: 1334-1337. Yeğen V., Balık S., Bostan H., Uysal R., Bilçen E. 2006. Recent Status of Fish Faunas in Some Lakes and Dams in Lakes Region. 1. Balıklandırma ve Rezervuar Yönetimi Sempozyumu, Antalya. pp: 129-140. (In Turkish with English abstract).