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Full-Text Articles in Animal Sciences
Body Size And Age In Three Populations Of The Northern Banded Newt Ommatotriton Ophryticus (Berthold, 1846) From Turkey, Çi̇çek Özcan, Nazan Üzüm
Body Size And Age In Three Populations Of The Northern Banded Newt Ommatotriton Ophryticus (Berthold, 1846) From Turkey, Çi̇çek Özcan, Nazan Üzüm
Turkish Journal of Zoology
We measured body size (snout-vent length, SVL) for three populations of Ommatotriton ophryticus newts in Turkey and estimated age using the skeletochronological method. Age was determined by counting the lines of arrested growth in cross-sections taken from phalanges. SVL was similar among populations and ranged between 58.41 and 85.78 mm in males and 50.33 and 71.56 mm in females. Males were significantly larger than females in all populations. Age at maturity was 4-6 years in males and 5-6 years in females. The average age of males and females did not differ significantly. Maximum age ranged from 9 to 12 years …
Assessing Age, Growth, And Reproduction Of Alburnus Mossulensis And Acanthobrama Marmid (Cyprinidae) Populations In Karakaya Dam Lake (Turkey), Aysel Alkan Uçkun, Di̇dem Gökçe
Assessing Age, Growth, And Reproduction Of Alburnus Mossulensis And Acanthobrama Marmid (Cyprinidae) Populations In Karakaya Dam Lake (Turkey), Aysel Alkan Uçkun, Di̇dem Gökçe
Turkish Journal of Zoology
In total, 626 individuals of Alburnus mossulensis and 586 individuals of Acanthobrama marmid were collected monthly from Karakaya Dam Lake on the upper Euphrates River. The gonadosomatic index, somatic condition, oocyte size, and fecundity were calculated on a monthly basis. Reading of scales indicated that the maximum age was 4+ years for A. mossulensis and A. marmid. The estimated length-weight relationships were W = 0.206 × FL^{2.065} for females and W = 0.119 × FL^{2.138} for males in A. mossulensis, and W = 0.029 × FL^{2.678} for females and W = 0.030 × FL^{2.631} for males in A. marmid. Growth …
Determination Of Some Biochemical Parameters Of Worker Honeybees (Apis Mellifera L.) Belonging To Different Age Groups, Ethem Akyol, Zeli̇ha Selamoğlu, Mehmet Fuat Gülhan
Determination Of Some Biochemical Parameters Of Worker Honeybees (Apis Mellifera L.) Belonging To Different Age Groups, Ethem Akyol, Zeli̇ha Selamoğlu, Mehmet Fuat Gülhan
Turkish Journal of Zoology
The catalase activity, total protein, and total RNA levels of worker bees of different age groups (4, 9, 15, 20, and 24 days old) within the same honeybee colony were studied. The catalase activities of group I (4 days), group II (9 days old), group III (15 days old), group IV (20 days old), and group V (24 days old) were 4.10 ± 0.59, 4.32 ± 0.57, 4.32 ± 0.57, 4.41 ± 0.49, and 4.47 ± 0.48 kU/g, respectively. There were significant differences in total protein and total RNA levels among the different age groups of workers. The calculated total …
The Body Size, Age Structure, And Growth Of Bosc's Fringe-Toed Lizard, Acanthodactylus Boskianus (Daudin, 1802), Nazan Üzüm, Çeti̇n Ilgaz, Yusuf Kumlutaş, Çi̇çek Gümüş, Azi̇z Avci
The Body Size, Age Structure, And Growth Of Bosc's Fringe-Toed Lizard, Acanthodactylus Boskianus (Daudin, 1802), Nazan Üzüm, Çeti̇n Ilgaz, Yusuf Kumlutaş, Çi̇çek Gümüş, Azi̇z Avci
Turkish Journal of Zoology
Using skeletochronology, the age structure of a breeding population portion of Acanthodactylus boskianus (Daudin, 1802) from the southeast of Turkey was studied for the first time. A total of 21 preserved (9 males, 8 females, and 4 juveniles) specimens were used in this study. According to the analysis of the age structure based on counting lines of arrested growth, ages ranged from 6 to 9 years (mean: 7.44 ± 0.34 years) in males and from 5 to 7 years (mean: 6.13 ± 0.30 years) in females. Juveniles were from 3 to 4 years old. Age at maturity was estimated to …
Some Biological Characteristics Of Atlantic Bonito (Sarda Sarda Bloch, 1793) From Gallipoli Peninsula And Dardanelles (Northeastern Mediterranean, Turkey), Özgür Cengi̇z
Turkish Journal of Zoology
This study was carried out to determine some biological characteristics of Atlantic bonito (Sarda sarda Bloch, 1793) from the Gallipoli Peninsula and Dardanelles (northeastern Mediterranean, Turkey) between September 2006 and October 2009. The length-weight relationship was estimated as W = 0.0020TL^{3.41} (r^2 = 0.96) for females, W = 0.0029TL^{3.32} (r^2 = 0.97) for males, and W = 0.0028TL^{3.32} (r^2 = 0.97) for all samples. The von Bertalanffy growth parameters were computed as L_{\infinity} = 68.5 cm, k = 0.78 year^{-1}, t_0 = -0.34 years for females; L_{\infinity} = 72.2 cm, k = 0.69 year^{-1}, t_0 = -0.52 years for males; …
The Ecology Of Freshwater Bivalves In The Lake Sapanca Basin, Turkey, Ertan Ercan, Özcan Gaygusuz, Ali̇ Serhan Tarkan, Martin Reichard, Carl Smith
The Ecology Of Freshwater Bivalves In The Lake Sapanca Basin, Turkey, Ertan Ercan, Özcan Gaygusuz, Ali̇ Serhan Tarkan, Martin Reichard, Carl Smith
Turkish Journal of Zoology
Despite the ecological importance and globally threatened status of freshwater bivalves, the freshwater mussel fauna of Turkey has hitherto received little attention. The aim of this study was to describe the ecology of freshwater mussels of the Lake Sapanca basin (northwest Turkey) to provide baseline data against which to measure future trends. Five native mussel species belonging to 3 genera were encountered in surveys: Anodonta cygnea, A. anatina, Unio pictorum, U. crassus, and Dreissena polymorpha. In addition, an invasive species from Asia, A. woodiana, was recorded in the region for the first time. A. cygnea and U. pictorum were the …
Age And Growth Of Swordfish (Xiphias Gladius L.) In The Aegean Sea, Okan Akyol, Tevfi̇k Ceyhan
Age And Growth Of Swordfish (Xiphias Gladius L.) In The Aegean Sea, Okan Akyol, Tevfi̇k Ceyhan
Turkish Journal of Zoology
Age and growth of swordfish, Xiphias gladius, were determined from 205 specimens (total n = 1408), collected from onboard a swordfish fishery fleet and from a wholesale fish market between June 2008 and July 2011. The length and weight distribution of all fish samples ranged from 51 to 242 cm and from 0.85 to 171.0 kg, respectively. The 70-80 cm lower jaw fork length range of swordfish had the highest ratio (approximately 57%). The length-weight relationship showed a positive allometric growth (b = 3.32; r^2 = 0.969). Age groups of swordfish in the Aegean Sea ranged between 0 and 4 …
Age Structure And Body Size Of The Strauch's Racerunner, Eremias Strauchi Strauchi Kessler, 1878, Abdullah Altunişik, Çi̇ğdem Gül, Nurhayat Özdemi̇r, Murat Tosunoğlu, Tuğba Ergül
Age Structure And Body Size Of The Strauch's Racerunner, Eremias Strauchi Strauchi Kessler, 1878, Abdullah Altunişik, Çi̇ğdem Gül, Nurhayat Özdemi̇r, Murat Tosunoğlu, Tuğba Ergül
Turkish Journal of Zoology
We studied, for the first time, the age structure of Eremias strauchi strauchi (Kessler, 1878) from a sample (18 adults) of a population living in the vicinity of Iğdır (eastern Turkey) using the skeletochronological method. The maximum observed longevity was 7 years for males and 5 years for females. The age of males ranged from 4 to 7 years (mean 4.91, n = 12), while that of females ranged from 4 to 5 years (mean 4.66, n = 6). The average snoutvent length (SVL) was 61.10 mm in males and 60.82 mm in females. The differences in mean age and …
Growth And Reproduction Of Brown Comber (Serranus Hepatus Linnaeus, 1758) In The Central Aegean Sea, Turkey, Ozan Soykan, Akin Türker İlkyaz, Gülnur Meti̇n, Hasan Tuncay Kinacigi̇l
Growth And Reproduction Of Brown Comber (Serranus Hepatus Linnaeus, 1758) In The Central Aegean Sea, Turkey, Ozan Soykan, Akin Türker İlkyaz, Gülnur Meti̇n, Hasan Tuncay Kinacigi̇l
Turkish Journal of Zoology
The growth and reproduction of brown comber (Serranus hepatus Linnaeus, 1758) were studied using specimens collected from the central Aegean Sea between July 2004 and June 2007. A total of 2410 specimens were analyzed, and of those, 2290 individuals were mature and 120 individuals were juvenile. Analyses covered all individuals because the species is a simultaneous hermaphrodite. The length-weight relationship was determined as W = 0.013L^{3.11}, indicating a positive allometric growth for all samples. The estimated von Bertalanffy growth parameters were L_{\infinity} = 13.19 cm, k = 0.252 y^{-1}, and t_o = -0.630 y, and the infinite weight (W_{\infinity}) was …
On The Life History Of Spirlin Alburnoides Bipunctatus (Bloch, 1782) In The Qanat Of Uzineh, Northern Iran, Rahman Patimar, Mohsen Zare, Mehdi Hesam
On The Life History Of Spirlin Alburnoides Bipunctatus (Bloch, 1782) In The Qanat Of Uzineh, Northern Iran, Rahman Patimar, Mohsen Zare, Mehdi Hesam
Turkish Journal of Zoology
Within the wide distribution of spirlin in Iran, populations of this species inhabit a great variety of habitats, including qanats. We hypothesized that qanats may contribute to habitat-specific variation in the life history of the fish. To test this, a total of 240 specimens of Alburnoides bipunctatus, caught in the qanat of Uzineh (northern Iran) from October 2007 to August 2008, were examined for life history attributes. The population had a 5-year life cycle. The weight-length relationship (WLR) was estimated as W = 0.0068TL^{3.2559} for males, W = 0.0079TL^{3.2067} for females, and W = 0.0072TL^{3.2387} for the population, having a …
Age And Growth Of Albacore (Thunnus Alalunga Bonnaterre, 1788) From The Eastern Mediterranean, Fi̇rdes Saadet Karakulak, Eli̇f Özgür, Mehmet Gökoğlu, İbrahi̇m Tamer Emecan, Alparslan Başkaya
Age And Growth Of Albacore (Thunnus Alalunga Bonnaterre, 1788) From The Eastern Mediterranean, Fi̇rdes Saadet Karakulak, Eli̇f Özgür, Mehmet Gökoğlu, İbrahi̇m Tamer Emecan, Alparslan Başkaya
Turkish Journal of Zoology
This study was designed to characterize the growth parameters of the albacore, Thunnus alalunga, in the eastern Mediterranean. A total of 819 albacore specimens were collected from gillnet boats operating in Antalya Bay (in the Levantine Sea) between May and July from 2006 to 2008. Individuals were all between 55 and 101 cm in fork length (FL). The fork length was directly proportional to weight, with a relationship of W = 0.00042FL^{2.246} for females, W = 0.00022FL^{2.396} for males, and W = 0.00016FL^{2.467} for males and females combined. Negatively allometric growth was observed in all individuals. Age and growth were …
Reproductive Biology And Age Determination Of Garra Rufa Heckel, 1843 (Actinopterygii: Cyprinidae) In Central Iran, Masoud Abedi, Amir Houshang Shiva, Hamid Mohammadi, Rokhsareh Malekpour
Reproductive Biology And Age Determination Of Garra Rufa Heckel, 1843 (Actinopterygii: Cyprinidae) In Central Iran, Masoud Abedi, Amir Houshang Shiva, Hamid Mohammadi, Rokhsareh Malekpour
Turkish Journal of Zoology
Some aspects of the reproductive biology of Garra rufa Heckel, 1843, a native cyprinid fish species from the Armand stream in Chaharmahal-o-Bakhtiari province, central Iran, were investigated by regular monthly collections throughout 1 year. A significant relationship between length and weight and the isometric growth pattern were observed in this fish. There were no significant differences in the total number of male and female specimens. The population of this cyprinid fish had a narrow age range of 0-4 years, and the maximum number of samples belonged to the age group of 2.01-3 years. Based on the patterns of gonadosomatic and …
Biological Characteristics Of The Common Pandora, Pagellus Erythrinus (Linnaeus, 1758), In The Central Aegean Sea, Gülnur Meti̇n, Akin Türker İlkyaz, Ozan Soykan, Hasan Tuncay Kinacigi̇l
Biological Characteristics Of The Common Pandora, Pagellus Erythrinus (Linnaeus, 1758), In The Central Aegean Sea, Gülnur Meti̇n, Akin Türker İlkyaz, Ozan Soykan, Hasan Tuncay Kinacigi̇l
Turkish Journal of Zoology
We investigated the length distribution, sex ratio, sex inversion length, length-weight relationship, age, growth, spawning period, age and length at first maturity of the common pandora inhabiting İzmir Bay. A total of 2654 common pandora were collected by trawl hauls of İzmir Bay (Turkey) between January 2002 and June 2007. The size of the samples ranged from 4.1 cm (0.95 g, February) to 27.8 cm (207.30 g, April) in total length. The samples were composed of 64.7% females, 5.1% males, 0.3% hermaphrodites, and 29.9% immature individuals, with a female to male ratio of 1:0.08. The age composition of the samples …
Age, Growth And Reproduction Of Four-Spotted Goby, Deltentosteus Quadrimaculatus (Valenciennes, 1837), In İzmir Bay (Central Aegean Sea), Gülnur Meti̇n, Akin Türker İlkyaz, Ozan Soykan, Hasan Tuncay Kinacigi̇l
Age, Growth And Reproduction Of Four-Spotted Goby, Deltentosteus Quadrimaculatus (Valenciennes, 1837), In İzmir Bay (Central Aegean Sea), Gülnur Meti̇n, Akin Türker İlkyaz, Ozan Soykan, Hasan Tuncay Kinacigi̇l
Turkish Journal of Zoology
Length distribution, sex ratio, length-weight relationship, age, growth, spawning period, age, and length at first maturity of four-spotted goby inhabiting İzmir Bay were investigated. A total of 1696 four-spotted goby were collected by trawl hauls between July 2004 and June 2007. The size of the fish sampled ranged from 3.1 to 9.2 cm total length. The samples were composed of 31.1% females, 27.7% males, and 41.2% juvenile individuals, with a female to male ratio of 1:0.89. The age of the fish ranged from 1 to 5 years. The length-weight relationship and the von Bertalanffy growth function were estimated for all …
Protein And Lipid Amounts Of The Parasitoid Bracon Hebetor Say (Hymenoptera: Braconidae) At Constant And Alternating Temperatures, Özgür Varer Işitan, Nevran Eylem Akman Gündüz, Adem Gülel
Protein And Lipid Amounts Of The Parasitoid Bracon Hebetor Say (Hymenoptera: Braconidae) At Constant And Alternating Temperatures, Özgür Varer Işitan, Nevran Eylem Akman Gündüz, Adem Gülel
Turkish Journal of Zoology
Bracon hebetor Say (Hymenoptera: Braconidae) is a gregarious synovigenic parasitoid that attacks late stage larvae of many important lepidopterous species. The purpose of the current study was to evaluate the influence of 3 constant (18, 25, and 35 °C) and 1 alternating temperature (incubator programmed to vary daily between 18, 25, and 35 °C at 8 h intervals) on protein and lipid amounts of female and male parasitoids. Protein amounts of female parasitoids were highest when exposed to alternating temperature. At all the temperatures tested, 1-day-old males had similar amounts of protein, but 5- and 10-day-old males had higher amounts …
Age And Growth Of The Mesopotamian Spiny Eel, Mastacembelus Mastacembelus(Banks & Solender, 1794), From Southeastern Anatolia, Aysun Gümüş, Erdi̇nç Şahi̇nöz, Zafer Doğu, Nazmi̇ Polat
Age And Growth Of The Mesopotamian Spiny Eel, Mastacembelus Mastacembelus(Banks & Solender, 1794), From Southeastern Anatolia, Aysun Gümüş, Erdi̇nç Şahi̇nöz, Zafer Doğu, Nazmi̇ Polat
Turkish Journal of Zoology
Mesopotamian spiny eels, Mastacembelus mastacembelus (Banks & Solender, 1794), were collected from a large dam lake located on the Euphrates River in order to determine the most reliable ageing method among different hard structures and to estimate growth parameters. Vertebra, otolith, and opercle series were removed from 195 individuals. Vertebrae displayed the most interpretable annulus formations. Total length ranged from 14.4 cm to 76.9 cm and total weight ranged from 6.0 g to 950.0 g. The length and weight frequency distribution was significantly different between the 2 sexes (K-S test, P < 0.001). The length-weight relationship, determined as W = 0.004TL^{2.84} (r = 0.98), revealed no sex-based significant difference (GLM, P > 0.05). Age classes ranged from 1 to 21 years …
Growth And Reproduction Of Large-Scaled Gurnard (Lepidotrigla Cavillone Lacepède, 1801) (Triglidae) In The Central Aegean Sea, Eastern Mediterranean, Akin Türker İlkyaz, Gülnur Meti̇n, Ozan Soykan, Hasan Tuncay Kinacigi̇l
Growth And Reproduction Of Large-Scaled Gurnard (Lepidotrigla Cavillone Lacepède, 1801) (Triglidae) In The Central Aegean Sea, Eastern Mediterranean, Akin Türker İlkyaz, Gülnur Meti̇n, Ozan Soykan, Hasan Tuncay Kinacigi̇l
Turkish Journal of Zoology
Age, growth, and reproduction of the large-scaled gurnard were studied in the central Aegean Sea to provide fisheries managers with the essential data for science-based management. A total of 2342 samples were collected by trawl hauls between July 2004 and June 2007 from İzmir Bay (Turkey). The size of the samples ranged from 3.4 to 15.2 cm total length and the samples were composed of 35.2% females, 25.7% males and 39.1% immature individuals, with a female to male ratio of 1:0.73. The length-weight relationship was calculated as W = 0.0086L^{3.16} for all samples. The age composition of the samples was …
Age, Growth, Length-Weight Relationship And Reproduction Of The Striped Seabream (Lithognathus Mormyrus L., 1758) (Sparidae) In The Beymelek Lagoon (Antalya, Turkey), Yilmaz Emre, İsmet Balik, Çeti̇n Sümer, D. Aytuğ Oskay, H. Özgür Yeşi̇lçi̇men
Age, Growth, Length-Weight Relationship And Reproduction Of The Striped Seabream (Lithognathus Mormyrus L., 1758) (Sparidae) In The Beymelek Lagoon (Antalya, Turkey), Yilmaz Emre, İsmet Balik, Çeti̇n Sümer, D. Aytuğ Oskay, H. Özgür Yeşi̇lçi̇men
Turkish Journal of Zoology
Age, growth, length-weight relationship and reproduction were investigated for striped seabream (Lithognathus mormyrus L., 1758) collected from Beymelek Lagoon (Antalya, Turkey) between February 2006 and January 2007. The ages of striped seabream ranged from 0 to 3 years for males and from 0 to 4 years for females. Their total lengths and weights ranged between 14.4 and 26.4 cm and 42 and 297 g for males and 14.3 and 27.4 cm and 40 and 329 g for females, respectively. The growth parameters of the von Bertalanffy equation were: L_{\infinity} = 28.3 cm, K = 0.456 year^{-1} and t_0 = -1.859 …
Protein, Lipid, And Glycogen Levels In The Parasitoid Bracon Hebetor Say (Hymenoptera: Braconidae), Eylem Akman Gündüz, Adem Gülel
Protein, Lipid, And Glycogen Levels In The Parasitoid Bracon Hebetor Say (Hymenoptera: Braconidae), Eylem Akman Gündüz, Adem Gülel
Turkish Journal of Zoology
This study compared the protein, lipid, and glycogen reserves in recently emerged unfed female and male Bracon hebetor Say (Hymenoptera: Braconidae) to those in 5- and 10-day-old wasps fed honey. Galleria mellonella (Linnaeus) (Lepidoptera: Pyralidae) and Ephestia kuehniella (Zeller) (Lepidoptera: Pyralidae) were used as host species. The mean level of protein in both sexes increased significantly from emergence to day 5, and then returned to emergence levels on day 10 in females, but remained constant in males during the same period. In honey-fed females glycogen levels increased significantly during the first 10 days of life; however, there was no significant …
Growth And Reproduction Of Blotched Picarel (Spicara Maena Linnaeus, 1758) In The Central Aegean Sea, Turkey, Ozan Soykan, Akin Türker İlkyaz, Gülnur Meti̇n, Hasan Tuncay Kinacigi̇l
Growth And Reproduction Of Blotched Picarel (Spicara Maena Linnaeus, 1758) In The Central Aegean Sea, Turkey, Ozan Soykan, Akin Türker İlkyaz, Gülnur Meti̇n, Hasan Tuncay Kinacigi̇l
Turkish Journal of Zoology
Growth and reproduction of the blotched picarel, Spicara maena (Linnaeus, 1758), were determined based on specimens (n = 2547) collected from the central Aegean Sea between July 2004 and June 2007. The samples consisted of 71.9% females, 16.2% males, and 11.9% immature individuals. The sex ratio of females to males was 1:0.23. The length-weight relationship was W = 0.011L^{3.02}, W = 0.011L^{3.00}, and W = 0.011L^{2.99} for the combined sexes, females, and males, respectively. For all samples and both sexes the length-weight relationship showed isometric growth. The von Bertalanffy growth equation was fitted on the basis of mean length-at-age data, …
Age, Growth, And Gonadosomatic Index (Gsi) Of Mediterranean Horse Mackerel (Trachurus Mediterraneus Steindachner, 1868) In The Eastern Black Sea, Cemaletti̇n Şahi̇n, Nazli Kasapoğlu, A. Mutlu Gözler, Ferhat Kalayci, Necati̇ Hacimurtazaoğlu, Cengi̇z Mutlu
Age, Growth, And Gonadosomatic Index (Gsi) Of Mediterranean Horse Mackerel (Trachurus Mediterraneus Steindachner, 1868) In The Eastern Black Sea, Cemaletti̇n Şahi̇n, Nazli Kasapoğlu, A. Mutlu Gözler, Ferhat Kalayci, Necati̇ Hacimurtazaoğlu, Cengi̇z Mutlu
Turkish Journal of Zoology
The aim of this study was to calculate the basic population parameters of Trachurus mediterraneus off the coast of the Eastern Black Sea. Average total length was estimated as 13.52 ± 1.884 cm for the entire population, 13.08 ± 1.594 cm for males, and 13.62 ± 1.804 for females. Average weight was 20.27 ± 8.819 g for the entire population, 18.65 ± 7.626 g for males, and 21.31 ± 9.184 g for females. Age of the fish ranged between 0 and 5 years. Length-weight, age-length, and age-weight relationships were estimated for the population, where W = 0.0089 × L^{2.9552}; L_t …
Growth, Mortality, And Reproduction Of Poor Cod (Trisopterus Minutus Linn., 1758) In The Central Aegean Sea, Gülnur Meti̇n, Akin Türker İlkyaz, Hasan Tuncay Kinacigi̇l
Growth, Mortality, And Reproduction Of Poor Cod (Trisopterus Minutus Linn., 1758) In The Central Aegean Sea, Gülnur Meti̇n, Akin Türker İlkyaz, Hasan Tuncay Kinacigi̇l
Turkish Journal of Zoology
A total of 1527 of poor cod (Trisopterus minutus Linn., 1758) were collected by trawl hauls between April 2001 and March 2002 from İzmir Bay (central Aegean Sea). The size of the fish (total length) ranged from 10.6 cm (minimum, September) and 24.8 cm (April). The population was composed of 53% males, 41% females, and 6% immature individuals, with a female to male ratio of 1:1.3. The age composition of the samples was from I to V. The von Bertalanffy growth parameters were L_{\infinity} = 28.1 cm, W_{\infinity} = 254.0 g, K = 0.26 y^{-1}, and t_{o} = -1.52 y. …
Use Of Otolith Length And Weight In Age Determination Of Poor Cod (Trisopterus Minutus Linn., 1758), Gülnur Meti̇n, Akin Türker İlkyaz
Use Of Otolith Length And Weight In Age Determination Of Poor Cod (Trisopterus Minutus Linn., 1758), Gülnur Meti̇n, Akin Türker İlkyaz
Turkish Journal of Zoology
Totally 189 poor cod (Trisopterus minutus Linn., 1758) specimens were collected by trawling in the central Aegean Sea between April 2001 and March 2002. The relationship of the otolith length and weight with the age of poor cod was investigated, as the age determination is relatively difficult by otolith readings. There was a linear relationship between the fish length (LT) and the otolith length (L_{o}), i.e. L_{o} = 0.421 LT + 1.659 (R^{2} = 0.998), a linear relationship between the fish age (T) and the otolith weight (W_{o}), i.e. W_{o} = 0.041 T - 0.030 (R^{2} = 0.994), and a …
Age And Growth Characteristics Of Himri Barbel (Barbus Luteus Heckel, 1843) In Orontes River, Turkey, Kaya Gökçek, İhsan Akyurt
Age And Growth Characteristics Of Himri Barbel (Barbus Luteus Heckel, 1843) In Orontes River, Turkey, Kaya Gökçek, İhsan Akyurt
Turkish Journal of Zoology
In this study, the age and growth of Himri Barbel (Barbus luteus Heckel, 1843) were determined based on specimens collected from Orontes River-Turkey, during the period from February 2004 to January 2005. This population comprised 7 age groups of males and 9 of females. The male and female ratio was 1:1.26 (M:F). Total length-weight relationship was estimated as W = 0.0129TL^{2.986} for females, W = 0.0125TL^{3.003} for males. Growth parameters of the von Bertalanffy equation were computed for females and males as: L_{infinite}= 38.77, W_{infinite}= 714.23, k = 0.300, t_0 = -1.69 and L_{infinite}= 40.32, W_{infinite}= 819.35, k = 0.247, …
Growth And Mortality Of The Brown Trout (Salmo Trutta L.) Population From Upper Aksu Stream, Northeastern Anatolia, Turkey, Murat Arslan, Ayhan Yildirim, Serdar Bektaş, Ali̇ Atasever
Growth And Mortality Of The Brown Trout (Salmo Trutta L.) Population From Upper Aksu Stream, Northeastern Anatolia, Turkey, Murat Arslan, Ayhan Yildirim, Serdar Bektaş, Ali̇ Atasever
Turkish Journal of Zoology
Age, sex, mortality, and growth characteristics of brown trout (Salmo trutta) from the upper Aksu Stream were investigated. Females and males comprised 52.13% and 47.87% of the population, respectively. Age ranged from 1 to 8. The fork length (L) and total weight (W) were 5.7-22.8 cm and 2.9-142.6 g, respectively. Length-weight relationships were W = 0.015 x L^{2.939}, W = 0.015 x L^{2.928}, and W = 0.015 x L^{2.932} for females, males, and overall, respectively. The estimated von Bertalanffy growth parameters were L_{infinity} = 33.27 cm, K = 0.107 y^{-1}, and t_0 = -1.046 y for females; L_{infinity} = 29.50 …
Age Structure And Reproductive Activity Of The Blue Sucker In The Milk River, Missouri River Drainage, Montana, Julie Bednarski, Dennis L. Scarnecchia
Age Structure And Reproductive Activity Of The Blue Sucker In The Milk River, Missouri River Drainage, Montana, Julie Bednarski, Dennis L. Scarnecchia
The Prairie Naturalist
The life history and ecology of the blue sucker (Cycleptus elongatus) in the lower Milk River, Montana were investigated in 2002 and 2003. A total of 253 blue sucker was captured; 248 adult fish, three larval fish, and two age-0 juveniles. The ages (n = 102) of the adult blue sucker ranged from 10 to 37 years; maximum age greatly exceeded ages reported in other studies. Blue sucker in the Milk River population grew slower, matured later, and lived longer than fish at lower latitudes. Adult females of the blue sucker were longer and weighed more than …
Age, Growth, And Sex Ratio Of Golden Grey Mullet, Liza Aurata (Risso, 1810) In Homa Lagoon (İzmir Bay, Aegean Sea), Akin Türker İlkyaz, Kürşat Firat, Şahi̇n Saka, Hasan Tuncay Kinacigi̇l
Age, Growth, And Sex Ratio Of Golden Grey Mullet, Liza Aurata (Risso, 1810) In Homa Lagoon (İzmir Bay, Aegean Sea), Akin Türker İlkyaz, Kürşat Firat, Şahi̇n Saka, Hasan Tuncay Kinacigi̇l
Turkish Journal of Zoology
In this study, age, growth, and sex ratio of 342 golden grey mullets, which were caught in fish traps during fishing season were determined. The samples were between 7.5 and 39.5 cm in length and were between < 1 and 4 years old. The length-weight relationship for this population was calculated as W = 0.01*L^{2.93}, L_{\infinity} = 43.2 cm, K = 0.33 yr^{-1}, and t_o = -0.30 yr. The male:female ratio of the population was 1:1.87 and first maturity was at the age of one year for both sexes.
Population Parameters Of The Pearl Oyster Pinctada Radiata (Leach) In Qatari Waters, Arabian Gulf, Saad Zakaria Mohammed, Mohammed Hamed Yassien
Population Parameters Of The Pearl Oyster Pinctada Radiata (Leach) In Qatari Waters, Arabian Gulf, Saad Zakaria Mohammed, Mohammed Hamed Yassien
Turkish Journal of Zoology
The pearl oyster, Pinctada radiata, represents the most abundant marine bivalve species in Qatari waters. The population parameters of this species were investigated and compared to those obtained previously from both the Mediterranean and Red seas. Four age groups with mean lengths of 56.75, 65.84, 77.54 and 84.66 mm were obtained for P. radiata from Qatari waters. The values of asymptotic length, Brody's growth coefficient and growth performance index were 132.18 mm, 0.34 y^{-1} and 1.77 respectively, while the total mortality coefficient equals 2.47 y^{-1}. The morphometric relationship between the total weight and dorso-ventral measurement was determined to be W …
Age, Growth And Reproduction Of Acanthalburnus Microlepis, Filippi 1863 From The Yağan Region Of The Aras River, Turkey, Mustafa Türkmen, Orhan Erdoğan, H. İbrahi̇m Hali̇loğlu, Ayhan Yildirim
Age, Growth And Reproduction Of Acanthalburnus Microlepis, Filippi 1863 From The Yağan Region Of The Aras River, Turkey, Mustafa Türkmen, Orhan Erdoğan, H. İbrahi̇m Hali̇loğlu, Ayhan Yildirim
Turkish Journal of Zoology
The age, growth and reproduction characteristics of 1105 Acanthalburnus microlepis from the Yağan region of the Aras River, Turkey, were determined from monthly samples. Ages ranged from 1 to 7 years. The sex ratio was approximately 1.0 (51.49 % males, 48.51 % females). Females attained greater size and age than males. Von Bertalanffy growth parameters were: L_o= 29.87 cm, K= 0.1049, t_o= -1.92. The length-weight relationships for males and females were found to be W=0.0099L^{3.098} and W=0.0118L^{3.052} respectively. The condition coefficients of males and females were calculated as 1.192 and 1.209 respectively. Both sexes matured at the age of 2 …
Comparable Age Determination In Different Bony Structures Of Pleuronectes Flesus Luscus Pallas, 1811 Inhabiting The Black Sea, Nazmi̇ Polat, Derya Bostanci, Savaş Yilmaz
Comparable Age Determination In Different Bony Structures Of Pleuronectes Flesus Luscus Pallas, 1811 Inhabiting The Black Sea, Nazmi̇ Polat, Derya Bostanci, Savaş Yilmaz
Turkish Journal of Zoology
The aim of this study is to determine the most reliable bony structure for ageing of Pleuronectes flesus luscus inhabiting the Black Sea. The age determination method and its accuracy are the most important subjects for the evaluation of age-weight-length relationships in fisheries biology, since the estimates of survival, growth and mortality rates, and the analysis of year classes and recruitment all depend on age structure. In this study, scales, vertebrae and otoliths removed from each fish were examined by two readers three times each without reference to any data except the date of capture. The precision of readers and …