scholarly journals Using guarding net to reduce regularly discarded invertebrates in trammel net fisheries operating on seagrass meadows (Posidonia oceanica) in Izmir Bay (Eastern Aegean Sea)

2013 ◽  
Vol 14 (2) ◽  
pp. 282 ◽  
Author(s):  
I. AYDIN ◽  
G. GOKCE ◽  
C. METIN
Keyword(s):  
Aegean Sea ◽  
Posidonia Oceanica ◽  
Control Group ◽  
Izmir Bay ◽  
Trawl Fishery ◽  
Seagrass Meadows ◽  
Hexaplex Trunculus ◽  
Eastern Aegean ◽  
Sea Grass ◽  
Lead Line

Prohibition of both beach and boat seines and trawl fishery along the İzmir Bay coasts in the Aegean Sea signifies intensive usage of gillnets and trammel nets, for catching red mullet (Mullus spp.) species in particular. Trials were realized between March 2009 and February 2010 with trammel nets in the areas on the boundaries of the sea grass (Posidonia oceanica) meadows in the Bay. Guarding net (selvedge) was attached to the lead line of experimental nets (Exp1-Exp2) - 36 and 40 mm inner panel. Differences for discard amounts between control group nets (C1-C2) (having the same inner panel as the experimental nets), used by commercial fishermen, and experimental nets are 54.7% for C1-Exp1 and 62.8% for C2-Exp2 (p<0.05). Use of nets with selvedge not only reduced regularly discarded invertebrates (Hexaplex trunculus, Bolinus brandaris, Maja spp.) in the region, but also avoided net damage caused by these species.

Soft-bottom sipunculans in Izmir Bay (Aegean Sea, eastern Mediterranean)

Zootaxa ◽  
2009 ◽  
Vol 2136 (1) ◽  
pp. 40-48 ◽  
Author(s):  
SERMIN AÇIK
Keyword(s):  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Posidonia Oceanica ◽  
Soft Bottom ◽  
Muddy Sand ◽  
Izmir Bay ◽  
Ecological Characteristics

This paper deals with the sipunculan species distributed in Izmir Bay (Aegean Sea, eastern Mediterranean). Benthic samples were taken at 29 stations between 1998 and 2001 at depths ranging from 8 to 77 m. Six species and 200 individuals belonging to three families were found. Aspidosiphon (A.) mexicanus is newly recorded from Izmir Bay. The majority of specimens were found on a sandy-mud substratum (42%), followed by sand (35%), muddy-sand (19%) and sand (3%), respectively. Among the habitats, Posidonia oceanica and muddy-sand were represented by the highest numbers of species (4 species), followed by sandy-mud (3 species), and sand (2 species). The densities of the species at sampling stations were determined and compared seasonally, based on the data collected in 2001. Brief descriptions of the species and their distributional, reproductive and ecological characteristics are given.

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