STUDYING THE SILURUS GLANIS LINNAEUS, 1758 FOOD ITEMS IN ANZALI LAGOON

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ABBASI KEYVAN; VALIPOUR ALI REZA

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Journal: Year:2005 | Volume:17 | Issue:1 (66 IN ANIMAL AND FISHERIES SCIENCES) Page(s): 14-24

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Title

STUDYING THE SILURUS GLANIS LINNAEUS, 1758 FOOD ITEMS IN ANZALI LAGOON

Author(s)

ABBASI KEYVAN | VALIPOUR ALI REZA | Issue Writer Certificate

Keywords

SILURUS GLANISQ4

FOOD ITEMSQ3

BIOLOGYQ3

ANZALI LAGOONQ3

Abstract

Anzali lagoon located in south-west region of Caspian Sea and regarded as the most important lagoons in the Caspian Sea catchment. European catfish, SILURUS GLANIS constituted 3.78% of total catch during 1992-1996. At present study (1998-2001) 95 specimens of S. glanis have been checked to get data concerning total length, body weight and age of S. glanis is measurement as follows 19.8 - 186.5 cm, 47.7 - 30000 g and 1 - 9 years old respectively. Females constituted 68.5% of total specimens. Also, coefficient of vacuity, fullness Index and relative intestinal length averages were measured 41.15,322.0±273.8 and 0.83±0.17 respectively. According to this study, S. glanis feeds on 19 diversified FOOD ITEMS including insects (4.13%), bivalve (0.5%), crustaceae (15.8%), amphibia (0.9%) and bony fishes (78.6%). Carassius auratus with 33.9%, Macrobrachium spp. with 14.22%, Neogobius kessleri with 4.59%, Insects with 4.13% and Proterorhinus marmoratus with 2.75% were dominant. On the other hand C. auratus in Spring and Autumn, Macrobrachium spp. in Summer and N. kessleri in Winter were the main FOOD ITEMS consumed by S. glanis. Also, piscivorous behavior positively correlated to length growth, so that consumption of fish item from the length 20-55 cm (44.2%) increased to 94.5% when the fish reached to 91-125 cm. This fish foraged mainly on two fish families, Cyprinidae (78.7%) and Gobiidae (14.8%). In this study we didnot observe cannibalistic behavior in S. glanis. In general, European catfish has consumed only prey species and did not damage any commercial fish stocks in the ecosystem.

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روند تغییرات صید ماهیان در تالاب انزلی در سالهای 75-1371

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APA: Copy

ABBASI, KEYVAN, & VALIPOUR, ALI REZA. (2005). STUDYING THE SILURUS GLANIS LINNAEUS, 1758 FOOD ITEMS IN ANZALI LAGOON. PAJOUHESH-VA-SAZANDEGI, 17(1 (66 IN ANIMAL AND FISHERIES SCIENCES)), 14-24. SID. https://sid.ir/paper/19258/en

Vancouver: Copy

ABBASI KEYVAN, VALIPOUR ALI REZA. STUDYING THE SILURUS GLANIS LINNAEUS, 1758 FOOD ITEMS IN ANZALI LAGOON. PAJOUHESH-VA-SAZANDEGI[Internet]. 2005;17(1 (66 IN ANIMAL AND FISHERIES SCIENCES)):14-24. Available from: https://sid.ir/paper/19258/en

IEEE: Copy

KEYVAN ABBASI, and ALI REZA VALIPOUR, “STUDYING THE SILURUS GLANIS LINNAEUS, 1758 FOOD ITEMS IN ANZALI LAGOON,” PAJOUHESH-VA-SAZANDEGI, vol. 17, no. 1 (66 IN ANIMAL AND FISHERIES SCIENCES), pp. 14–24, 2005, [Online]. Available: https://sid.ir/paper/19258/en

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