Apaydin Yagci M.,Production and Training Institute
Iranian Journal of Fisheries Sciences | Year: 2013
This study was carried out to determine seasonal variation and zooplankton community structure in Karataş Lake, Southern Turkey. Zooplankton samples were collected seasonally between 2002 and 2003 in two stations using a zooplankton net of 55-μ m mesh size. A total of 42 taxa were identified, including 19 taxa (45.2 %) Rotifera, 16 taxa (38.1 %) Cladocera, and 7 taxa (16.7 %). Copepoda. Among them, Keratella quadrata, Asplanchna priodonta from Rotifera, Daphnia longispina, Ceriodaphnia quadrangula, Chydorus sphaericus, Coranatella rectangula from Cladocera, and Eudiaptomus drieschi, Eucyclops speratus from Copepoda were dominant species. Spring and autumn seasons were found to be the most similar by using Sorenson index value.
Kanylmaz M.,Production and Training Institute
Pakistan Journal of Zoology | Year: 2016
The present study aimed to determine reproductive performance of a newly described Salmo species, Salmo kottelati (Alakir trout), under culture conditions. With this purpose, hatching performance of 10 selected females was evaluated by fertilizing with pooled sperm from 10 males. For determination of sperm characteristics, 10 males were randomly selected, stripped and their milt samples were individually taken. Average fertilization rate, eyed-egg rate and hatching rate were found as 88.3%, 81.9% and 65.2% respectively. Sperm characteristics such as volume per fish (mL), pH, concentration (per mL), motility (%) and duration of motility (second) were 2.60, 7.6, 21.2×109, 78.2 and 56.6 respectively. The study results and scientific observations regarding reproductive performance suggest that S. kottelati can be considered a candidate species for aquaculture.
Balik I.,Ordu University |
Emre Y.,Production and Training Institute
Journal of Applied Ichthyology | Year: 2016
The main objective of this study was to investigate the population structure, length-weight relationship (LWR) and growth of white seabream, Diplodus sargus sargus (L., 1758) in Beymelek Lagoon, Turkey. Samples were collected by gill- and trammel nets of various mesh sizes, February 2006 to January 2007. A total of 355 specimens (51 males; 34 females; 270 unidentified) were collected. Male to female ratio was 1.50 : 1. Ages ranged from 0 to 3 years; about 70% were juveniles. Most fish were between 13 and 16 cm in total length and below 90 g in weight. The LWR of all individuals was W = 0.0140 × L3.1028. The von Bertalanffy growth equation was calculated as Lt = 39.9 × [1 - exp(-0.268 × (t + 1.753)] and the growth performance index (Φ′) was 6.056. © 2016 Blackwell Verlag GmbH.
Alp M.T.,Mersin University |
Fakioglu Y.E.,Mersin University |
Ozbay O.,Mersin University |
Kocer M.A.T.,Production and Training Institute
Aquatic Ecosystem Health and Management | Year: 2016
This study aimed to determine the physicochemical characteristics of the water quality and trophic state of Akgöl Lagoon located in the eastern Mediterranean. Cluster analysis clearly revealed the spatial heterogeneity classifying sampling stations as saline and freshwater/brackish water sites. A multivariate analysis of variance followed by principal component analysis supported that salinity was major factor affecting physicochemical water quality variations in the lagoon. As salinity was mainly governed by freshwater inflows depending on agricultural irrigation, it can be proposed that water quality was significantly influenced from freshwater use by human activities. The parameters used as predictors (total nitrogen, total phosphorus, chlorophyll a and Secchi disk transparency) yielded different trophic states for the lagoon. However, as chlorophyll is a better predictor than the other indices, it was concluded that the Akgöl Lagoon is at mesotrophic status. Copyright © 2016 AEHMS.
Smales L.R.,South Australian Museum |
Aydogdu A.,Uludag University |
Emre Y.,Production and Training Institute
Comparative Parasitology | Year: 2015
Seven species of endemic freshwater fish, Aphanius anatoliae, Aphanius villwocki (Cyprinodontidae), Capoeta angorae, Capoeta erhani, Capoeta mauricii, Chondrostoma fahirae, and Pseudophoxinus fahrettini (Cyprinidae) from Turkey were examined for acanthocephalans. Acanthocephalus sp., Neoechinorhynchus zabensis, Pomphorhynchus spindletruncatus, and Paralongicollum nurtenae n. sp. were found. The new species can be distinguished from its congeners by a suite of characters including the shape of the proboscis, which has an armature of 16-22 rows of 10-13 hooks, the posterior most circle of hooks alternating. All are new host and locality records. The geographic distributions of N. zabensis and P. spindletruncatus in Turkey may be due in part to changes in glacial river system connections that have occurred since the Pleistocene. © 2015 The Helminthological Society of Washington.