As from January 2010 The Israeli Journal of Aquaculture -Bamidgeh (IJA) will be published exclusively as an on-line Open Access (OA) quarterly accessible by all AquacultureHub (http://www.aquaculturehub.org) members and registered individuals and institutions. Please visit our website (http://siamb.org.il) for free registration form, further information and instructions.This transformation from a subscription printed version to an on-line OA journal, aims at supporting the concept that scientific peer-reviewed publications should be made available to all, including those with limited resources. The OA IJA does not enforce author or subscription fees and will endeavor to obtain alternative sources of income to support this policy for as long as possible.

No abstract

Conjunctivitis is frequently seen in red-eared sliders (Trachemys scripta elegans). If the diseases are untreated, it can cause starvation and death. This study was performed on eleven red-eared sliders with conjunctivitis. Clinical findings were closed eyes, chemosis and unilaterally or bilaterally tear secretion, loss of sight and anorexia. Conjuctival swap samples were taken for bacterial examination. Aeromonas hydrophyla and Pseudomonas spp. were detected in microbiological analysis. In treatment were performed bath with enrofloxacine solutions (5 mg/L), 3% boric acid solution and oral Vitamin A (5.000 IU/L). In all cases, full recovery was seen following the treatment. This is the first report about enrofloxacin bath for using conjuctivitis in red-eared sliders. As a result; bath with enrofloxacin solutions may be a suitable alternative treatment for red-eared sliders with conjunctivitis. Keywords: Conjunctivitis, Red-eared slider, Trachemys scripta elegans, Enrofloxacin, Bath treatment Kırmızı Yanaklı Su Kaplumbağaları (Trachemys Scripta Elegans) Konjunktivitis Olgularında Enrofloksasin ile Banyo Sağaltımı ve Sonuçları ÖzetKırmızı yanaklı su kaplumbağalarında (Trachemys scripta elegans) sık görülen konjunktivitis vakaları tedavi edilmediği takdirde açlık ve ölümle sonuçlanabilir. Bu çalışma konjunktivitis teşhisi konan 11 kırmızı yanaklı su kaplumbağası üzerinde yapılmıştır. Klinik muayenede kaplumbağaların göz kapaklarında ödem, korneada bulanıklık, tek veya iki taraflı gözyaşı akıntısı ile görme kaybı ve iştahsızlık tespit edilmiştir. Göz konjunktivasından alınan sıvaptan yapılan mikrobiyolojik ekimlerde Aeromonas hydrophyla ve Pseudomonas türleri belirlenmiştir. Tedavide oral vitamin A (5.000 IU/L), %3'lük asit borik ve enrofloksasin (5 mg/L) solüsyonlarıyla banyo uygulandı. Tedavi sonrası tüm olgularda tam bir klinik iyileşme görüldü. Bu çalışmada banyo tarzında enrofloksasin uygulaması kırmızı yanaklı su kaplumbağalarının konjunktivitis tedavisinde ilk defa denenmiştir. Sonuç olarak; kırmızı yanaklı kaplumbağalar ve egzotik hayvanların göz hastalıklarında enrofloksasin solüsyonu ile banyo tedavisi alternatif bir tedavi metodu olabilir.

No abstract

The aim of the present investigation is to compare the effect of standard method and electrical stunning on some hemolymph biochemical parameters in mid-sized Red Swamp Crayfish. The results showed that electrical stunning time of induction was significantly shorter and recovery was longer than chilling stun. Parameters of an electrical field that stuns crayfish beyond the point of recovery without causing damage have been identified. Based on this experiment, it seems that electrical stunning would be preferable to the other method.

In the Bulgarian aquaculture sector, focusing research efforts on the technical specifications of the cultivation of African catfish (Clarias gariepinus) is important due to the need for more information. We aimed to assess the impact of light intensities on prolactin and cortisol levels as stress markers in African catfish. Fish were acclimated over an appropriate period to the short photoperiod (16D and 8L) and then distributed randomly to three groups, each separated by sex. Fish exposed to different light intensities (63, 51, and 40 lux, respectively) were followed for 45 days by lux meter. Blood samples were collected from the caudal vein using a 2 ml K2EDTA-coated syringe. A laser fluorescence reader assayed plasma prolactin and cortisol. The pituitary was removed from anesthetized fish and fixed for histological examinations. The results of our study suggest that increasing light intensity increases prolactin and cortisol levels in African catfish.

Aspirin is one of the most widely used medications globally as an analgesic and antipyretic drug. Aspirin use as an antiparasitic against fish parasites has never been tested. The parasite Dactylogyrus is considered a serious threat to freshwater aquaculture in relation to considerable losses. The present study is aimed to evaluate the antiparasitic effect of aspirin against Dactylogyrus extensus on Cyprinus carpio and alteration in gill histopathology. In vitro, aspirin exhibited antiparasitic activity with median effective concentration (EC50) values at one and six minutes of 8.137 g/L−1 and 1.629 g/L−1, were assessed for the first time. In vivo antiparasitic efficacy of aspirin to D. extensus was found to be 46.49%. Severe lesion profile was observed in histopathological evaluations of the gills.

A pathobiome approach has been revealed as a set of organisms (i.e. prokaryotic, eukaryotic, and virus associations) in the aquatic environment that interact with the host (fish) to cause disease. The approach of the one pathogen–one disease is not wholly satisfactory to comment on the impairment of health status and disease process in fish. To exemplify the pathobiome concept, we present a fish disease in which more than one pathogen and possible synergistic interaction of inadequate water quality. In this case, the heavy mortalities were observed in Salema (Sarpa salpa) from an exhibition aquaria. Bacterial identification with matrix-assisted laser desorption ionization/time-of-flight mass spectrometry (MALDI-TOF MS) showed the pathogen bacteria species of vibrio and photobacterium. In the parasitic examination, the invasion of marine ciliata, Cryptocaryon irritans was observed in the diseased fish. Moreover, poor water quality was considered as contributing factor to disease emergence in this case. The co-existence of pathogen Vibrio species (Vibrio harveyi) and Photobacterium damsela with its subspecies (subsp. damsela and subsp. piscicida) as well as marine ciliata, C. irritans for a description of a disease picture in a marine fish species are reported for the first time, providing an example of a pathobiome paradigm.