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Öğe A new fish species for the Northern Aegean Sea Fauna; Aulopus filamentosus (Bloch, 1792)(Ege Univ, 2006) İşmen, Ali; Yigin, Cigdem; Cakir, FikretIn this study, a new record is given in order to fill the gap to some extent, with respect to the fish fauna of the Aegean Sea. A single specimen was sampled among commercial catches from the North Aegean Sea, Babakale coasts in February 2005. It is species, distributed along Aegean Sea from Izmir coasts to Babakale coasts. In study, morphological characteristics and fin formulas was determined with detail.Öğe A study on the catch composition and bycatch of shrimp beam trawl in the Sea of Marmara(Ege Univ, Fac Fisheries, 2006) Yazici, M. Fatih; İşmen, Ali; Altinagac, Ugur; Ayaz, AdnanCatch productivity, catch composition, bycatch and discard rates of shrimp beam trawl were investigated between January 2003 and March 2004 in Marmara Sea. A total of 37 species which were captured by beam trawl during survey. The relative abundance in weight, respectively, were 51,3 % arthropoda, 30,9 % fish species, 15,5 % echinodermata, 1,3% mollusc. The deep water pink shrimp (Parapenaus longirostris) formed 50,8 % of the total catch. The length distribution of deep water pink shrimp ranged from 47 mm to 154 mm. Catch productivity in beam trawl fishery was calculated 10,1 kg/h. On average 0,42 kg discard, 0,62 kg incidental catch rate and 1,04 kg by-catch for 1 kg shrimp were estimated from beam trawl fisheries.Öğe Age and Growth of Spiny Dogfish Squalus acanthias (Squalidae: Chondrichthyes) in the North Aegean Sea(Zoological Soc Pakistan, 2016) Yigm, Cahide Cigdem; İşmen, AliMale and female spiny dogfish Squalus acanthias were collected in the North Aegean Sea from Saros Bay between February 2005 and September 2008. Squalus acanthias ranged from 17.1 to 121.6 cm in total length. Age was estimated using the second dorsal spine of 345 spiny dogfish. The coefficent of variation estimated value was 11.1%. Both male and female spiny dogfish readhed 7 years of age. Estimates of the von Bertalanffy growth parameters suggest that females attain a larger asymptotic TL (L-infinity=101.21 cm) than males do (L-infinity=72.85 cm) and grow more slowly (K=0.15 y(-1) and 0.27 y(-1), respectively). A relationship was determined between the age of spiny dogfish and spine size: their spine length and spine base length (r(s)=0.625), and their spine base width (r(s)=0.611).Öğe AGE, GROWTH AND OTOLITH BIOMETRY-BODY LENGTH RELATIONSHIPS OF RED BANDFISH (Cepola macrophthalma L., 1758) IN THE SEA OF MARMARA, TURKEY(Trakya Univ Balkan Yerlesesi Enstituler Binasi, 2020) İşmen, Ali; Ihsanoglu, Mukadder Arslan; Daban, Ismail Burak; Inceoglu, HasimThe age, growth, and the otolith biometry-total length relationships of Cepola macrophthalma (Linnaeus, 1758) were investigated. The individuals were caught with beam trawl in the Sea of Marmara from March 2012 to June 2014. The individual with 51.5 cm total length sampled in this study was recorded as the new maximum size of C. macrophthalma in the Marmara Sea. The length-weight relationship showed negative allometric growth with a 1.36 b value. Otolith length-otolith weight, otolith width-otolith weight, otolith length-total length, otolith width-total length, otolith length-otolith width and total length-otolith weight relationships were found as OW=0.0002*OL2.6377 (R-2=0.91), OW=0.001*OWi(2.6215) (R-2=0.94), O=0.057*TL+3.2087 (R-2=0.57), OWi=0.0316*TL+1.8511 (R-2=0.55), OWi=0.527*OL+0.2015 (R-2=0.86), OW=0.0004*TL+0.0029 (R-2=0.58), respectively. Ages were estimated from 80 otolith readings and the minimum and maximum ages observed were 1 and 5 years, respectively. The growth parameters of the von Bertalanffy equation were calculated as L-infinity=61.95 cm, K=0.19 year(-1), t(0) = 0.05 years. A great majority of the stock (77%) consisted of younger individuals (1-2 age groups). Cepola macrophthalma stock consisted of mainly younger individuals which may indicate that an effective fishing pressure is effective on the stock.Öğe Age, Growth and Reproduction of Silvery Pout (Gadiculus argenteus Guichenot, 1850) in the Saros Bay (Northeastern Aegean Sea)(Springer International Publishing Ag, 2019) İşmen, Ali; Yigin, Cahide Cigdem; Ihsanoglu, Mukadder Arslan; Oz, Melike IdilThe age, growth and reproduction of Silvery Pout (Gadiculus argenteus), caught in the Bay of Saros (Northeastern Aegean Sea) between April 2005 and September 2008, were investigated. The total length and weight of the G. argenteus ranged from 5.5 cm to 16.8 cm in total length (TL) and from 1.6 g to 30.7 g in weight. The length-weight relationships were estimated W = 0.011*TL2.924.Age data derived from otoliths readings were used to estimate the growth parameters of the von Bertalanffy equation. The population growth parameters for G. argenteus were estimated as L-infinity = 14.97 cm, K = 0.28 year(-1) and t(0) = -1.69 year. The maximum age was 5 years. The data on maturity stages indicated that length at 50% maturity (L-50) were 8.94 cm TL for G. argenteus. Monthly values of the gonadosomatic index indicated that reproduction period of G. argenteus was determined between December and March.Öğe Age, growth and reproduction of the common stingray, Dasyatis pastinaca from the North Aegean Sea(Taylor & Francis As, 2012) Yigin, C. Cigdem; İşmen, AliAge, growth and reproductive parameters of the common stingray, Dasyatis pastinaca, in the North Aegean Sea are reported. Age was estimated by counting the growth rings of thin sections of vertebral centra from 83 fish (83 - 114 cm total length, TL). The relationship between TL and the vertebral centrum ratio (CR) was curvilinear, therefore a quadratic model was preferred to describe between the vertebral centrum growth and body growth. The oldest common stingray were 16 years (females) and 10 years (males), which corresponded to total lengths of 114 and 83 cm, respectively. Estimates of von Bertalanffy growth parameters suggest that males attain a slightly larger asymptotic total length (L-infinity = 188.49 cm) than females (L-infinity = 119.96 cm) and grow more slowly (K = 0.065 year(-1) and 0.086 year(-1), respectively). The size at which 50% (TL50) of males and females were sexually mature at 62.5 cm TL.Öğe Age, Growth and Reproduction of the Thornback ray, Raja clavata (Linnaeus, 1758) in the Waters Off Gökçeada (the Northern Aegean Sea)(Springer Science and Business Media Deutschland GmbH, 2023) Yığın, Cahide Çiğdem; Cabbar, Koray; İşmen, Ali; Daban, İsmail Burak; Arslan İhsanoğlu, MukadderIn this study, the age, growth, maturity, and reproductive biology parameters of 262 Raja clavata, which were collected monthly from commercial trawlers off Gökçeada between February 2019 and February 2020, were estimated. The individuals comprise of 55.7% females and 44.3% males. The length of the females ranged between 23-84.2 cm (Disc width: 13.5-55.8 cm) and 11.2-74 cm (Disc width: 8-48.9 cm) for males. For age determination, age readings were performed on the vertebrae of 255 Raja clavata specimens (43.5% female, 56.4% male). The calculated von Bertalanffy growth parameters were estimated to be L∞= 93.04 cm, K=0.17 years-1, to=0.48 years for males, and L∞=102.46 cm, K=0.16 years-1, t0 =0.72 years for females. The minimum and maximum ages of the thornback rays ranged from 1 to 10 years. The first sexual maturity length of the population was measured to be L50 =57.7 cm in males, and L50 =66.1 cm in females.Öğe Age, Growth and Reproductive Biology of the Common Two-Banded Seabream (Diplodus vulgaris Geoffroy Saint-Hilaire, 1817) from the Northern Aegean Sea, Turkey(Springer International Publishing Ag, 2019) İşmen, Ali; Daban, Ismail Burak; Ihsanoglu, Mukadder Arslan; Yigin, Cahide Cigdem; Cabbar, Koray; Atak, SibelThe present study aims to describe population dynamics (age, growth, mortality and fecundity) of common two-banded seabream. Sampled individuals were obtained monthly between November 2017 and October 2018 directly from commercial fisherman in the Northern Aegean Sea. Ages were estimated from 327 otolith readings; the minimum and maximum ages observed were 1 and 8 years, respectively, corresponding to 13 and 29 cm total length (TL). The length-weight relationship was W = 0.0156*L-2.97 (R-2 = 0.92) for the whole population and isometric growth was detected. The growth parameters of Von Bertalanffy fitted to back-calculated size for age data were: L infinity = 30.69 cm, K = 0.20 and t(0) = -2.64 per year. The instantaneous rates of total mortality (Z) and natural mortality (M) were 0.86 and 0.47 per year, respectively. Rates of fishing mortality F and exploitation E were 0.39 and 0.35 per year, respectively. The spawning season extended from September to March and peaked in December. Total lengths at 50% maturity were 18.32 cm for males and 20.37 cm for females. Mean absolute fecundity (F) was 73,154 +/- 10,271 oocytes, ranging from 10,727 to 316,730.Öğe Age, growth and reproductive biology of the saddled seabream (Oblada melanura) in the North Aegean Sea, Eastern Mediterranean(Walter De Gruyter Gmbh, 2020) Daban, Ismail Burak; İşmen, Ali; Ihsanoglu, Mukadder Arslan; Cabbar, KorayThis study determines the length distribution, length-weight relationship, age, growth parameters, mortality rate, sex ratios, length at first maturity and reproduction of saddled seabream (Oblada melanura) collected monthly by fishermen around the Northern Aegean Sea between November 2017 and October 2018. The length-weight relationship was calculated as W = 0.0091 x L-3.11 (R-2 = 0.95) and positive allometric growth was found. The condition factor and GSI varied between 0.81-1.58 and 0.01-9.61, respectively. The spawning season extended from May to July and peaked in June. Total lengths at 50% maturity were 18.97 cm for males and 18.83 cm for females. Parameters of the von Bertalanffy growth equation were: L-infinity = 29.91 cm, K = 0.27 per year, t(0) = -0.82 year and age varied between 1 and 8. The instantaneous rates of total mortality (Z) and natural mortality (M) were 1.36 and 0.58 per year, respectively. Rates for fishing mortality F and exploitation E were 0.78 and 0.57 per year, respectively. The mean absolute fecundity (F) was 117 075 +/- 23 243 oocytes, ranging from 19130 to 470 132.Öğe Age, Growth, and Reproduction of Common Sole, Solea solea (Linnaeus, 1758) in the Sea of Marmara, Turkey(2021) Daban, İsmail Burak; Ihsanoglu, Mukadder Arslan; İşmen, Ali; Yığın, Cahide ÇiğdemThis study revealed the length-weight relationship, age, growth and mortality parameters, and reproductive biology of thecommon sole, Solea solea in the Sea of Marmara, Turkey. Samplings were conducted with bottom trawl between March2017 and December 2018 at 34 stations. The length-weight relationship was calculated as W=0.0082×TL3.01. Ages wereranged between 1 and 5 years. The von Bertalanffy growth parameters were calculated as L?=34.56 cm, K=0.48 y-1, and t0=-0.01 y. The size at first maturity was 21.9 cm TL. The extended reproduction period was observed (from September to April).The rates of natural mortality (M), total mortality (Z), fishing mortality (F), and exploitation rate (E) were calculated to be0.79, 2.4, 1.61, and 0.67, respectively. The biological reference points were calculated as Fopt=0.395; Flim=0.53 andEopt=0.333, respectively. The length where the maximum yield can be obtained (Lopt) was found as 22.3 cm TL. The resultsshowed that S.solea is under the influence of excessive fishing pressure in the Sea of Marmara.Öğe AGE, GROWTH, AND REPRODUCTION OF DENTEX MAROCCANUS (ACTINOPTERYGII: PERCIFORMES: SPARIDAE) IN THE SAROS BAY (NORTH AEGEAN SEA)(Wydawnictwo Akad Rolniczej W Szczecinie, 2014) Gul, Guzin; İşmen, Ali; Arslan, MukadderBackground. The Morocco dentex, Dentex maroccanus Valenciennes, 1830, is a sparid species, which has economical value and its population is expanding in a 20-500 m depth range throughout the Mediterranean. Worldwide, there is a lack of information about the biology (age, growth, reproductive season, first maturity length) of this species. This study provides the first data on population parameters of D. maroccanus in the Aegean Sea. Materials and methods. Dentex maroccanus were caught in the Saros Bay (north Aegean Sea) between September 2006 and September 2008. The length-weight relations were determined according to the allometric equation: W = aL(b). The spawning season was determined by analyzing the maturity stages and gonadosomatic index, while first maturity length was defined as the size at which 50% of individuals were mature. Growth parameters were estimated using the von Bertalanffy growth equation. Results. The female-male ratio was 4.8 : 1. The total length (weight) of females ranged from 11.4 cm to 25.2 cm (26.2 g to 289.3 g) and of males from 12.8 cm to 24.3 cm (19.8 g to 223.9 g). The growth parameters were calculated as L-infinity = 25.31 cm, K = 0.49 year(-1), t(0) = -0.30 year. The length at first maturity for females and males was 13.0 cm and 15.8 cm, respectively. Monthly values of the gonadosomatic index indicated that spawning occurred mainly between June and September. Conclusion. Results reported in this work will contribute to the knowledge on the biology of D. maroccanus in the north Aegean Sea and also to a better understanding of its role in the marine ecosystem.Öğe Age, growth, reproductive biology and feed of the common guitarfish (Rhinobatos rhinobatos Linnaeus, 1758) in Iskenderun Bay, the eastern Mediterranean Sea(Elsevier, 2007) İşmen, Ali; Yigin, Cigdem; Ismen, PinarThe age, growth, reproduction, and feeding of common guitarfish (Rbinobatos rhinobatos) were studied using 225 specimens from the Iskenderun Bay, (eastern Mediterranean). Females made up 43% and males 57% of the individuals. The total length of females ranged from 22.2 to 81 em, and of males from 22 to 120cm. The total length-weight relationships was W=0.0036 x TL2.93. The age data, derived from vertebrae readings, were used to estimate the growth parameters of the von Bertalanffy equation: L-infinity = 128.6 cm, K=0.29, t(0)=-0.89. The maximum age was 5 years. The parturition time of common guitarfish occurred in summer (from May to September). The mean TL and mean weight of developed fetuse were 25.7 cm TL and 48.5 g, respectively. Males matured at 68 cm TL and females at 69 cm TL. The stomachs contained mainly Crustacea. (c) 2006 Elsevier B.V. All rights reserved.Öğe Analysis of Demersal Fish Fauna off the Sea of Marmara, Turkey(Çanakkale Onsekiz Mart Üniversitesi, 2021) Daban, İsmail Burak; İşmen, Ali; Şirin, Murat; Yığın, Cahide Çiğdem; Arslan İhsanoğlu, MukadderDemersal fish fauna of the Sea of Marmara, Turkey was determined by bottom trawl surveys between March 2017-December 2018 at 34 stations with the monthly samplings. During the study, a total of 61 teleost and 12 cartilaginous fish species belonging to 42 families were sampled. The target, bycatch and discard rates of CPUE were determined as 13.40%, 69.64% and 16.95%, respectively. In total, 53.9% of the CPUE was stemmed from Trachurus trachurus. Mustelus mustelus, Raja clavata, Merluccius merluccius and Merlangius merlangius had the highest CPUE with a mean of 77.63, 71.86, 71.72 and 72.68 kg/km2, respectively. The highest biodiversity was observed in the southwestern part of the Marmara Sea. With increasing depth, the species number of the teleost fish decreased, whereas the species number of the cartilaginous fish increased. The mean CPUE values of the economical demersal fish species were lower in comparison to those reported from other regions in Turkey. Evidence suggests fish stocks with shallower distribution is under heavier threat against fishing pressure. Since commercial trawling is banned in the Sea of Marmara, beam trawl fishery can be considered as the major threat to demersal fish stocks in the region.Öğe Bathymetric Distribution, Seasonal Growth and Mortality of the Deep-Water Rose Shrimp Parapenaeus longirostris (Decapoda: Penaeidae) in an Unexploited Stock in Saros Bay, Aegean Sea(Medwell Online, 2009) Bilgin, Sabri; Ozen, Ozcan; İşmen, Ali; Ozekinci, UgurTo describe the growth, mortality and distribution pattern of the deep-water rose shrimp, Parapenaeus longirostris in an unexploited resource, 301 trawl surveys were conducted between 20 and 465 in water depths from February 2005 to September 2008 in Saros Bay, Aegean Sea. Bathymetrical biomass distribution of the deep-water rose shrimp shown a clear tendency towards the deeper waters with highest biomass estimations exceeding 50 kg h(-1) obtained in water depths between 201 and 300 in. Von Bertalanffy Growth (VBG) parameters were estimated from monthly Carapace Length (CL) frequency distribution data using three different methods: ELEFAN, PROJMAT and SLCA. For the data of this study, the seasonal VBG parameters obtained from ELEFAN was considered to best describe the growth pattern and were estimated as L infinity = 34.7 mm, K = 1.05 year(-1), t(o) = -0.95 year, WP = 0.87 (i.e., November) and C = 0.47 for females and as L infinity = 27.0 mm, K = 1.49 year(-1), t(o) = -0.88 year, WP = 0.35 (i.e., May), C = 0.53 for males. Growth performance index (Phi') was higher in females (Phi' = 3.10) than males (Phi' = 3.03). Instantaneous annual mortality rates (Z), assumed to represent annual natural Mortality rate (M), ranged between 1.19 and 4.73 year(-1) for females and between 0.88 and 3.51 year(-1) for males, depending on the method used for the estimation. The mortality rates estimated with the Seasonal Length Converted Catch Curve (SLCCC) method was the most appropriate one for the Saros Bay stock and was estimated as 1.72 year(-1) for females and as 1.82 year(-1) for males.Öğe Benthic marine litter in the Marmara Sea, Turkey(Ege Univ, Fac Fisheries, 2022) Sirin, Murat; Daban, Ismail Burak; İşmen, Ali; Ihsanoglu, Mukadder ArslanThis study presents the first data on benthic marine litter in the Marmara Sea, Turkey. To obtain the data, bottom trawl surveys were conducted at 34 sites between May 2017 and February 2018. The litter items were sampled and sorted following the MEDITS' relevant instructions. 660 pieces of litter, weighing 434.9 kg, were sampled. The litter density was found to range between 27.5 n/km(2) and 661.2 n/km(2), averaging 73.9 n/km(2), and the obtained items' weights ranged between 0.03 kg/km(2) and 1597.8 kg/km(2), averaging 48.7 kg/km(2). The plastic group L1 constituted 71.7% of the trawled litter. The highest mean litter density was detected in the Northeastern Marmara Sea in the spring and summer of 2018. The mean benthic litter density was found to be higher than the nearby areas. It was concluded that more effort should be invested in reducing marine pollution.Öğe Biological Aspects of the Brown Ray (Raja miraletus Linnaeus, 1758) in the Saros Bay, the Northern Aegean Sea(Çanakkale Onsekiz Mart Üniversitesi, 2021) Yığın, Cahide Çiğdem; İşmen, AliThe present study reports the age, growth, and reproduction parameters of 52 brown rays (Raja miraletus) captured from the Saros Bay (Northern Aegean Sea) between September 2006 -2008. The males and females accounted for 44.2% and 55.8% of the sample, respectively. The males measured 10.5-53.5 cm (disc width, 6.5-32 cm) and the females ranged 25.5-47.7 cm (disc width, 18-30.5 cm) in total length (TL). The equations TW=0.0017*TL3.27 and TW=0.0017*DW3.38 were used to describe the total length-weight and disc width-weight relationships, respectively. The length-at-age data on vertebrae were used to estimate the von Bertalanffy growth equation: L∞ = 62.43 cm, K = 0.28 year−1, t0 = −0.54 year. The maximum age was found to be 4 years for both the males and females.Öğe Biological traits and population dynamic of Parapenaeus longirostris (Lucas, 1846) in the Marmara Sea, Turkey(Ege Univ, Fac Fisheries, 2020) Ihsanoglu, Mukadder Arslan; İşmen, AliParapenaeus longirostris is a valuable resource for the crustacean fisheries in the Marmara Sea, therefore, in this study length-weight relationships, growth, mortality, reproduction, recruitment patterns, the probabilities of capture and per recruit analyses were determined. Total 36288 samples were collected by beam trawl between September 2011 and July 2014 in 229 sampling stations. The total length (TL), body weight (g) and carapace length (CL) values ranged between 34 -175 mm, 0.2 - 28.9 g and 8 - 41 mm, respectively. CL-weight relationship equations were calculated for females, males and combined sexes, respectively, W=0.0023xCL(2.)5, W=0.0029xCL(2.43), W=0.0022xCL(2.52). The growth parameters were determined as L-infinity=199.5 mm, k=0.47, t(0)=-0.5 in TL, L-infinity=36.8 mm, k=0.37, t(0)=-0.69 in CL. L-25, L-50, and L-75 values were found to be 15.15 mm, 16.29 mm, 17.44 mm for males and 16.62 mm, 18.07 mm, 19.52 mm for females. The sexual maturity length for females was found 27.3 mm CL and the exploitation rate was found at 0.62 for the whole population.Öğe Çanakkale balıkçılığının genel durumu(2006) İşmen, Ali; Çolakoğlu, Fatma Arık; Özen, Özcan; Yığın, Cahide ÇiğdemBu çalışmada, Devlet İstatistik Enstitüsü, Çanakkale Tarım İl Müdürlüğü ve Çanakkale Su Ürünleri Hali verileri kullanılarak, Çanakkale bölgesindeki su ürünleri üretimi ve avcılık yapısının genel bir değerlendirilmesi yapılmıştır. Çanakkale bölgesinde avlanan su ürünleri türleri, av miktarları, balıkçı gemileri ve avlanma teknolojisi ile Çanakkale balık haline giren türlerin miktarları, 1996 ve 2004 yılları arasında karşılaştırılmıştır. Çanakkale bölgesinde kayıtlı tekne sayısı 1067 adet olup, en çok avlanan türler sardalye, lüfer, midye, palamut, hamsi, orkinos, kolyoz, kefal, istavrit ve barbunyadır. Çanakkale bölgesi 2003 yılı toplam su ürünleri üretimi 22.774 ton olup, Türkiye su ürünleri üretiminin (587.715 ton) yaklaşık %4'nü oluşturmaktadır. Çanakkale balık halinde işlem gören tür sayısı bölgede avlanılan tür sayısının yaklaşık yarısıdır ve av miktarı da yaklaşık %2 sidir. Bölgede en çok uzatma ve algama takımı kullanan tekneler bulunmaktadır.Öğe Çanakkale Boğazı'nda nütrient ve klorofil-a düzeylerinde meydana gelen aylık değişimler(2004) Türkoğlu, Muhammet; Yenici, Elif; İşmen, Ali; Kaya, SelahattinBu çalışmada Mart 2001 ve Mart 2002 döneminde, Çanakkale Boğazı Yat Limanı girişi yüzey deniz suyunun fizikokimyasal parametreleri ile ilişkili olarak inorganik nutrient $(NO_{^-2}+NO_{^-3}, PO_{^-3_4} ve SiO_4)$ ve klorofil-a miktarlarının aylık değişimleri incelenmiştir. Çanakkale Boğazı yüzey deniz suyunda ayrıca sıcaklık, tuzluluk, pH, iletkenlik, ÇO (Çözünmüş Oksijen), Ç0%, ORP (oksidasyon indirgenme potansiyeli) ve TDS (Total çözünmüş anyon ve katyonlar) değerleri de ölçülmüştür. Nitrit+nitrat $(NO_{^-2+NO_{^-3})$ düzeyinde Kasım (1.606 $mu$ M), Ocak (2.320 $mu$ M) ve Mart (1.3003 $mu$ M) aylarında oluşan pikler, fosfat $(PO^{-3}_4)$ düzeyinde Haziran (0.700 $mu$ M), Ekim (0.400 $mu$ M) ve Ocak (0.500 $mu$ M) aylarında oluşmuştur. Diğer nutrient düzeylerinde olduğu gibi, silikat $(SiO_4)$ düzeyinde de Mart (3.70 $mu$ M), Ekim (4.40 $mu$ M) ve Ocak (4.45 $mu$ M) aylarında olmak üzere üç ayrı pik oluşmuştur. Şubat 2002 dönemi hariç (1.503 $mu$ M), $SiO_4$ hiçbir zaman 2.500 $mu$ M konsantrasyon değerinin altına düşmemiştir. Fitoplankton aktivitesinin bir göstergesi olan Klorofil-a pigmenti yılda üç farklı pik oluşturmuştur. Bunlar, Temmuz döneminde en büyük olan pik (3.3431 $mu g l^{-1}$) , Ocak ayındaki küçük olan ikinci pik (1.7543 $mu g l^{-1}$) ve Mayıs ayında daha küçük olan üçüncü piktir (1.0757 $mu g l^{-1}$). Veri grupları arasında yapılan korelasyonlarda, tuzluluk ile sıcaklık arasında (r= -0.8587), DO ile sıcaklık arasında (r= -0.5177) ve TDS ile sıcaklık arasında (r= -0.8532) önemli düzeylerde negatif korelasyonlar görülmüştür. Bununla birlikte, tuzluluk ve iletkenlik arasında (r= 0.5374) ve tuzluluk ile TDS arasında (r= 0.9863) ise önemli pozitif korelasyon görülmüştür. Nutrient konsantrasyonları ile diğer fizikokimyasal parametreler ve klorofil-a arasında önemli bir korelasyonun olmadığı tespit edilmiştir. Yapılan çalışmada sadece $SiO_4$ ve $P0^3_4$ arasında önemli bir korelasyonun olduğu görülmüştür (r= 0.5190). Elde edilen fizikokimyasal, inorganik nutrient ve klorofil-a ölçüm sonuçlarının Çanakkale Boğazı'nda mevcut iki yönlü akıntı sisteminden önemli derecede etkilendiğini göstermektedir. Ayrıca, diğer önemli bir özelliğin $NO_2+NO_3$ konsantrasyonlarındaki değişiminin yıl içinde 10-15 kata kadar yükselebilmesidir. $PO^3_4$ ve SiO_4 konsantrasyonlarında ise bu denli bir değişim görülmemiştir.Öğe Çanakkale ilindeki su ürünleri tüketim davranışlarının değerlendirilmesi(2006) Çolakoğlu, Fatma Arık; İşmen, Ali; Özen, Özcan; Çakır, Fikret; Yığın, Cahide Çiğdem; Ormancı, Hasan BasriSu ürünlerinin, beslenmede, hayvansal protein kaynağı oluşu nedeniyle taşıdığı önem büyüktür. Ancak ülkemizde, hızla artan nüfus oranı ve dengeli beslenmemizde görülen ciddi sıkıntılara rağmen su ürünlerinden halen yeterince faydalanılmaması düşündürücüdür. Bu çalışmada, doğal avcılığı ve aynı zamanda da kültür balıkçılığı ile dikkat çeken Çanakkale ilinde, halkın balık tüketim davranışlarının incelenmesi düşünülmüş ve bu amaçla da 680 kişiye anket yapılmıştır. Ankete katılanların beyaz eti birinci sırada (%47,5) balık etini ikinci sırada (%29,85), kırmızı eti ise üçüncü sırada (%22,05) tükettikleri tespit edilmiştir. En çok sevilen balığın lüfer, en çok tüketilen balığın ise sırasıyla istavrit, hamsi, sardalya ve çipura olduğu saptanmıştır. Katılımcıların % 65'inin balığı taze olarak tükettiği, tüketim şekli olarak da kızartma (% 45,73) veya ızgara (% 39,08) tercih ettiği saptanmıştır. Ailelerin çoğunluğunun (% 87,46) ayda 1 -6 kg arasında balık tükettikleri tespit edilmiştir.
