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Full-Text Articles in Life Sciences
Highways For Red Wood Ants (Hymenoptera: Formicidae): A New Method To Increase The Size Of Anthills, Stanislav Stukalyuk, Mykola Kozyr
Highways For Red Wood Ants (Hymenoptera: Formicidae): A New Method To Increase The Size Of Anthills, Stanislav Stukalyuk, Mykola Kozyr
Turkish Journal of Zoology
Red wood ants (RWA, Formica rufa group) play a key role in forest ecosystems as effective entomophages and participants in the circulation of organic matter. The aim of our study was to evaluate the efficiency of using the highway method to accelerate the growth of anthills, specifically focusing on height, diameter, volume. The study was conducted in Kyiv, Ukraine, from May to October 2023. In the experimental group, highways were constructed on ant trails, totalling nine Formica polyctena Forster, 1850 anthills and eight Formica rufa Linnaeus, 1761 anthills. These highways consisted of a continuous line of logs ranging from 10 …
Using Body Condition Index Can Be An Unreliable Indicator Of Fitness: A Case Of Sand Lizard Lacerta Agilis Linnaeus, 1758 (Sauria: Lacertidae), Krzysztof Dudek, Zofia Sajkowska, Monika Gawalek, Anna Ekner-Grzyb
Using Body Condition Index Can Be An Unreliable Indicator Of Fitness: A Case Of Sand Lizard Lacerta Agilis Linnaeus, 1758 (Sauria: Lacertidae), Krzysztof Dudek, Zofia Sajkowska, Monika Gawalek, Anna Ekner-Grzyb
Turkish Journal of Zoology
In ecological and morphological studies, researchers often use body condition index as a measure of an individual's fitness. Our research shows that body condition index may be an unreliable method for this purpose, because changes in lizards' body proportions are not stable during their lifetime. Results obtained from a Polish population of the sand lizard (Lacerta agilis) show that the body length increases faster than the body mass, meaning that the correlation between these 2 parameters is not linear. Herpetologists frequently use the body condition index to compare the fitness of lizards of different ages. Our study demonstrates that this …
Growth And Reproduction Of Cyprinion Macrostomus (Heckel, 1843) And Cyprinion Kais (Heckel, 1843) Populations In Karakaya Dam Lake (Euphrates River), Turkey, Aysel Alkan Uçkun, Di̇dem Gökçe
Growth And Reproduction Of Cyprinion Macrostomus (Heckel, 1843) And Cyprinion Kais (Heckel, 1843) Populations In Karakaya Dam Lake (Euphrates River), Turkey, Aysel Alkan Uçkun, Di̇dem Gökçe
Turkish Journal of Zoology
This study investigated the age-length relationship, length-weight relationship, somatic condition, gonadosomatic index, and reproduction properties of Cyprinion macrostomus and Cyprinion kais. C. Kais is an endemic species included on the IUCN Red List of Threatened Species in the Tigris-Euphrates Basin. A total of 153 C. Macrostomus and 114 C. Kais were collected. The estimated length-weight relationships were W = 0.725 × FL2.92 (r2 = 0.87) for C. Macrostomus and W = 0.417 × FL3.02 (r2 = 0.93) for C. Kais. The age-length relationships were Lt = 15.0 [1 - e-0.212 (t + 0.407)] and Lt = 15.4 [1 - e-0.205 …
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 …
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 …
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 …
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; …
Assessing The Potential Impact Of Nonnative Fish On Native Fish By Relative Condition, Özcan Gaygusuz, Özgür Emi̇roğlu, Ali̇ Serhan Tarkan, Hamdi̇ Aydin, Ni̇ldeni̇z Top, Zeynep Dorak, Uğur Karakuş, Sercan Başkurt
Assessing The Potential Impact Of Nonnative Fish On Native Fish By Relative Condition, Özcan Gaygusuz, Özgür Emi̇roğlu, Ali̇ Serhan Tarkan, Hamdi̇ Aydin, Ni̇ldeni̇z Top, Zeynep Dorak, Uğur Karakuş, Sercan Başkurt
Turkish Journal of Zoology
Nonnative species (NNS) pose one of the most common threats to the conservation of biodiversity. Given the difficulty in measuring and documenting the specific impacts of introduced species on native species, indices of condition may provide an easy and inexpensive alternative. The aim of this study was to understand the impact of NNS on some common and endemic freshwater fishes, examining their relative conditions in the absence (allopatry) and presence (sympatry) of nonnative fish species from 3 different regions in the western part of Turkey. Data from 19 sites, a total of 1672 fish of 11 cyprinid species, were used …
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 …
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 …
Growth Performance And Body Composition Of Kutum Fingerlings, Rutilus Frisii Kutum (Kamenskii 1901),In Response To Dietary Protein Levels, Ghaffar Ebrahimi, Hossein Ouraji
Growth Performance And Body Composition Of Kutum Fingerlings, Rutilus Frisii Kutum (Kamenskii 1901),In Response To Dietary Protein Levels, Ghaffar Ebrahimi, Hossein Ouraji
Turkish Journal of Zoology
A feeding trial was conducted to determine the optimal dietary crude protein requirement for Rutilus frisii kutum fingerlings. Five isoenergetic experimental diets were formulated to contain graded levels of protein (32%, 37%, 42%, 47%, and 52%). Triplicate groups of 80 kutum (average weight 0.5 g) were stocked in 250-L tanks and fed to apparent satiation 3 times a day for 8 weeks. The results indicate that the growth performance and feed utilization of kutum were significantly (P < 0.05) affected by dietary protein level. The second polynomial regression of weight gain against protein level yielded an estimated optimal dietary protein requirement of 41.6%. Weight gain, specific growth rate, and feed efficiency increased with increasing the dietary protein level from 32% to 42%, but decreased significantly (P < 0.05) with further increases in dietary protein. The protein efficiency ratio was inversely correlated with dietary protein level. Feed intake was not affected (P > 0.05) by dietary protein level. No significant difference was found in the whole-body protein, lipid, moisture, or ash contents of fish fed the …
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 …
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 …
Length-Weight Relationships For 21 Fish Species Caught In The Argolikos Gulf (Central Aegean Sea, Eastern Mediterranean), Kostas Kapiris, Dimitris Klaoudatos
Length-Weight Relationships For 21 Fish Species Caught In The Argolikos Gulf (Central Aegean Sea, Eastern Mediterranean), Kostas Kapiris, Dimitris Klaoudatos
Turkish Journal of Zoology
The length-weight relationship for both sexes of 21 fish species caught in Argolikos Gulf (central Aegean Sea, eastern Mediterranean), using a variety of fishing gear, was estimated for the first time. Fishing took place between August 2007 and August 2008, and the fishing gear used included gill and trammel nets, long lines, and beach seines from 58 inshore fishing vessels. Individuals caught by trammel nets were usually longer and heavier than those collected by other fishing gear. The allometric coefficient (b) for the majority of species (59%) was statistically significantly higher than 3.0, indicating positive allometry between length and weight …
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 …
On The Growth Of The Scaldfish Arnoglossus Laterna (Walbaum, 1792) From İzmir Bay, Central Aegean Sea, Di̇lek Uçkun İlhan, Sencer Akalin, Okan Özaydin, Zafer Tosunoğlu, Semi̇h Leblebi̇ci̇
On The Growth Of The Scaldfish Arnoglossus Laterna (Walbaum, 1792) From İzmir Bay, Central Aegean Sea, Di̇lek Uçkun İlhan, Sencer Akalin, Okan Özaydin, Zafer Tosunoğlu, Semi̇h Leblebi̇ci̇
Turkish Journal of Zoology
Scaldfish (Arnoglossus laterna) (n = 1892) were caught in İzmir Bay (Aegean Sea) from January 2005 to December 2006. Total length and weight of all specimens ranged from 3.9 to 16.0 cm and from 0.47 to 41.63 g, respectively. The overall ratio of females to males was 1:1.91. The length-weight relationships for females, males, and all specimens combined were estimated, respectively, as W = 0.0096 × L^{2.921}, W = 0.0111 × L^{2.857}, and W = 0.0096 × L^{2.917}; and the parameters of the von Bertalanffy growth equations were, respectively, L_{\infinity}= 17.58, 15.36, and 17.19 cm; k = 0.412, 0.461, and …
Life History Features Of The Nonindigenous Three-Spined Stickleback (Gasterosteus Aculeatus Linnaeus, 1758) In The Gomishan Wetland (Southeast Caspian Sea, Iran), Rahman Patimar, Mariam Horry Najafabadi, Manizheh Ghadi Souraki
Life History Features Of The Nonindigenous Three-Spined Stickleback (Gasterosteus Aculeatus Linnaeus, 1758) In The Gomishan Wetland (Southeast Caspian Sea, Iran), Rahman Patimar, Mariam Horry Najafabadi, Manizheh Ghadi Souraki
Turkish Journal of Zoology
The Caspian Sea forms the southern limit of the distribution range of the three-spined stickleback (Gasterosteus aculeatus), but little is known about its life history in this area. A total of 362 specimens were collected from the Gomishan wetland (southeast Caspian Sea, Iran) to describe the stickleback's life history characteristics. Samples were taken monthly between February and July of 2008. The maximum ages of the population observed were 2+ years for males and 3+ years for females. The length-weight relationship (LWR) was estimated as W = 0.0042TL^{3.711} for immature specimens, W = 0.0095TL^{3.1328} for males, and W = 0.0057TL^{3.4678} for …
Growth And Length-Weight Relationships Of The Horse Mackerel, Trachurus Mediterraneus Ponticus (Aleev, 1956), Off The Bulgarian Black Sea Coast, Maria Hristova Yankova, Violin Stoyanov Raykov, Dimitar Borisov Gerdzhikov, Petya Bogomilova Frateva
Growth And Length-Weight Relationships Of The Horse Mackerel, Trachurus Mediterraneus Ponticus (Aleev, 1956), Off The Bulgarian Black Sea Coast, Maria Hristova Yankova, Violin Stoyanov Raykov, Dimitar Borisov Gerdzhikov, Petya Bogomilova Frateva
Turkish Journal of Zoology
Between April 2007 and October 2008 we collected 1995 horse mackerel specimens from the territorial waters of the Bulgarian Black Sea. Age, length, and weight of these specimens were determined to estimate length-weight relationships and age composition. The present study utilized otolith characterization to determine age. The sex ratio was 1:1.36686 (M:F). The prevalent age classes were 2+, 3+, and 4+. The exponent b of equation resulted in the value 3.3046, which indicates that the weight growth is positive allometric. Growth parameters of the von Bertalanffy equation were separately evaluated for females and males as follows: L_{\infinity} = 19.66, K …
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 …
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, 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 And Reproduction Properties Of Capoeta Trutta (Heckel,1843) In Karakaya Dam Lake, Ercan Kalkan
Growth And Reproduction Properties Of Capoeta Trutta (Heckel,1843) In Karakaya Dam Lake, Ercan Kalkan
Turkish Journal of Zoology
In this study, 510 samples of Capoeta trutta living in Karakaya Dam Lake were studied. After determining sex distribution, size (length and weight), growth rates, and growth conditions factors of 210 C. trutta specimens were examined. The number of female and male specimens was 104 and 106, respectively. The age of females and males ranged between 1-7 and 0-7 years, respectively. The age-length, age-weight, and length-weight curves were constructed. According to the von Bertalanffy equation, females and males were: L_t = 89.5[1-e^{-0.0571(t+2.4138))}], W_t = 9627.1[1-e^{0.0571(t+2.4238))}]^{3.0325} L_t = 76.4[1-e^{-0.0604(t+2.6514))}], W_t = 5207.2[1-e^{0.0604(t+2.6514))}]^{2.9322}, respectively . The calculated length-weight relation (W) was 0.0116 …
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. …
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 …
Influence Of Visible Implant Fluorescent Elastomer (Vie) Tagging On Growth, Molting And Survival Of The Eastern White River Crayfish, Procambarus Acutus Acutus (Girard, 1852), Yavuz Mazlum
Turkish Journal of Zoology
Tag retention, growth, molting, and survival of crayfish, Procambarus acutus acutus, 35-37 mm in total length were evaluated between tagged and untagged groups. There were no significant differences in molting and survival between the tagged and untagged groups (P > 0.05). Tag retention was 100% for crayfish kept individually in plastic containers for the 60-day experimental period. The tagged group had a mean growth of 7.0 mm (molts only) while the untagged group had a mean growth of 4.0 mm (molts only). Molting rates were similar between the tagged and untagged groups. Nine molts were observed each in the tagged (n …
Food Utilisation In A Laboratory Colony Of The Giant African Land Snail, Archachatina Marginata (Swainson) (Pulmonata: Achatinidae), Rosemary I. Egonmwan
Food Utilisation In A Laboratory Colony Of The Giant African Land Snail, Archachatina Marginata (Swainson) (Pulmonata: Achatinidae), Rosemary I. Egonmwan
Turkish Journal of Zoology
This study investigates food consumption by juveniles and adults of the edible giant land snail Archachatina marginata under laboratory conditions. In one experiment, the snails were fed weekly from hatching for 13 months with weighed amounts of lettuce (Lactuca sativa), carrot (Daucus carota), potato (Solanum tuberosum), apple (Malus pumila), and calcium. Another group of 2-month-old A. marginata ovum was fed singly for 3 days on each of the test food items. The results show that, when given a choice, A. marginata can select from the 4 types of food and calcium. When given no choice, lettuce provided high digestibility and …
Growth And Reproduction Of Por's Goatfish (Upeneus Pori Ben-Tuvia & Golani, 1989) In İskenderun Bay, The Eastern Mediterranean, Ali̇ İşmen
Turkish Journal of Zoology
The age composition, growth parameters, spawning season, sex ratio, length at first sexual maturity and fecundity of por's goatfish (Upeneus pori) caught from the Bay of İskenderun in the eastern Mediterranean Sea were investigated. Females and males made up 52.6% and 47.4%, respectively, of the particular population of the species. The total length of females ranged from 7.0 cm to 17.0 cm, and of males from 6.6 cm to 15.1 cm. The length (L) - weight (W) relationships for males and females were estimated as W = 0.0108*L^{2.99} and W = 0.0097*L^{3.03}, respectively. The age data derived from otolith readings …
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.