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Articles 7831 - 7860 of 10522

Full-Text Articles in Zoology

The Tabanidae (Diptera) Fauna Of Balıkesir Province, Ali̇ Yavuz Kiliç Jan 2001

The Tabanidae (Diptera) Fauna Of Balıkesir Province, Ali̇ Yavuz Kiliç

Turkish Journal of Zoology

The faunistic study was carried out in Balıkesir province between 1996-1997 and 50 Tabanidae species were determined. The total number of species reported from the province by previous studies and this study reached 57. Twenty-four of these species are the first records for this province. Five species are from Chrysopsinae, and the rest of them are from Tabaninae.

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Rediscovery Of Sesteria Gallandi Bourguignat, 1884 (Mollusca, Pulmonata, Buliminoidea, Enidae), Hartwig Schütt, Ridvan Şeşen Jan 2001

Rediscovery Of Sesteria Gallandi Bourguignat, 1884 (Mollusca, Pulmonata, Buliminoidea, Enidae), Hartwig Schütt, Ridvan Şeşen

Turkish Journal of Zoology

Rediscovery of the land-snail Sesteria gallandi Bourguignat, 1884 is reported. The original description was based on only one empty shell, which later was lost and never found again, and the exact type locality in Turkey was unknown. Now we found this species in Mardin Province near the village of Sariköy on the Cizre - İdil - Midyat road 20 km after İdil in the forest, in May 2000.

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A Study On The Seasonal Distributions Of Ostracoda (Crustacea) Species Found In Lake Eğirdir (Isparta/Turkey), Selçuk Altinsaçli Jan 2001

A Study On The Seasonal Distributions Of Ostracoda (Crustacea) Species Found In Lake Eğirdir (Isparta/Turkey), Selçuk Altinsaçli

Turkish Journal of Zoology

This study was conducted at Lake Eğirdir in the summer (July), autumn (September), winter (February) and spring (April) of 1997. The materials collected from 41 stations were analysed and 19 species (Ilyocypris biplicata, Ilyocypris bradyi, Ilyocypris gibba, Candona neglecta, Cypris pubera, Prionocypris zenkeri, Eucypris inflata, Eucypris virens, Heterocypris incongruens, Cyprinotus inaequivalvis, Cypria ophtalmica, Physocypria kraepelini, Cypridopsis hartwigi, Cypridopsis vidua, Plesiocypridopsis newtoni, Potamocypris varigeata, Psychrodromus olivaceus, Darwinula stevensoni and Limnocythere inopinata) belonging to 15 genera were recorded. Cypridopsis hartwigi is a new record for the Ostracoda fauna of Turkey.

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Comparable Age Determination In Different Bony Structures Of Pleuronectes Flesus Luscus Pallas, 1811 Inhabiting The Black Sea, Nazmi̇ Polat, Derya Bostanci, Savaş Yilmaz Jan 2001

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 …

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Larval Rearing Of The Black Sea Turbot, Scophthalmus Maximus (Linnaeus, 1758), Under Laboratory Conditions, Temel Şahi̇n Jan 2001

Larval Rearing Of The Black Sea Turbot, Scophthalmus Maximus (Linnaeus, 1758), Under Laboratory Conditions, Temel Şahi̇n

Turkish Journal of Zoology

To establish a seed production technique for Black Sea turbot, Scophthalmus maximus, eggs and larvae were observed under artificial rearing conditions. Larvae were obtained artificially from eggs of tank-held broodstock. The egg fertilization was 27.6% and the fertilized eggs were 1.213±0.063 mm in diameter, were spherical pelagic and had one oil globule. From an initial length of 3.12±0.14 mm on day 0, the larvae grown to 167.28±15.32 mm in the normal group and to 159.98±12.25 mm in the abnormal group on day 246. The feeding regime consisted of Nannochloropsis oculata, Brachionus plicatilis, Artemia, and granule feed. The survival rates were …

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Certain Reproductive Characteristics Of The Catfish (Clarias Gariepinus Burchell, 1822) Living In The River Asi, Turkey, Şükran Özdi̇lek Yalçin, Kemal Solak, İhsan Akyurt Jan 2001

Certain Reproductive Characteristics Of The Catfish (Clarias Gariepinus Burchell, 1822) Living In The River Asi, Turkey, Şükran Özdi̇lek Yalçin, Kemal Solak, İhsan Akyurt

Turkish Journal of Zoology

A total of 523 C. gariepinus caught in the River Asi were surveyed from October, 1996 to September, 1998 to find out the age distribution throughout the population that varied between 0+ and 5 years of age, with the one year age group observed to be dominant in number. Findings also showed that both sexes started to reach maturity at the age of 1, and all the fishes examined had become mature by the end of the second year. The average diameter of ripened eggs was 1.41 - 1.66 mm. They spawned in a period from May to August when …

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Stomach Contents Of The Catfish (Clarias Gariepinus Burchell, 1822) In The River Asi (Turkey), Şükran Özdi̇lek Yalçin, İhsan Akyurt, Kemal Solak Jan 2001

Stomach Contents Of The Catfish (Clarias Gariepinus Burchell, 1822) In The River Asi (Turkey), Şükran Özdi̇lek Yalçin, İhsan Akyurt, Kemal Solak

Turkish Journal of Zoology

Natural food items of catfish (Clarias gariepinus Burchell, 1822) were investigated in the River Asi from September 1996 to October 1998. Analyses of stomach contents showed that the catfish feed basically on Arthropoda, mostly Diptera larvae, and on plant materials to a considerable extent. A successful filter feeding was observed, especially during the summer period.

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What We Know About Minnesota's First Endangered Fish Species: The Topeka Shiner, Jay T. Hatch Jan 2001

What We Know About Minnesota's First Endangered Fish Species: The Topeka Shiner, Jay T. Hatch

Journal of the Minnesota Academy of Science

The Topeka shiner, Notropis topeka, is the first of Minnesota's native ichthyofauna to be classified as federally endangered. The species is in serious decline in Kansas, Missouri, Nebraska and Iowa but is far more common in Minnesota than once was thought. At present, it is known from 89 sites in 17 streams of the Missouri River Drainage. Topeka shiners are multiple-clutch spawning nest associates of sunfishes and reproduce over an eight- to ten-week period between late May and early August. Mean clutch size is 261 to 284. Longevity is three years. Males grow faster than females, reaching longer mean total …

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Twenty-Five Years Of Population Fluctuations Of Microtus Ochrogaster And M-Pennsylvanicus In Three Habitats In East-Central Illinois, Lowell L. Getz, Joyce E. Hofmann, Betty Mcguire, Thomas W. Dolan Iii Jan 2001

Twenty-Five Years Of Population Fluctuations Of Microtus Ochrogaster And M-Pennsylvanicus In Three Habitats In East-Central Illinois, Lowell L. Getz, Joyce E. Hofmann, Betty Mcguire, Thomas W. Dolan Iii

Biological Sciences Faculty Publications

Populations of 2 species of arvicoline rodents, the prairie vole (Microtus ochrogaster) and meadow vole (M. pennsylvanicus), were monitored monthly in alfalfa, bluegrass, and tallgrass prairie habitats in east-central Illinois from 1972 through 1997. Alfalfa provides very highquality preferred food and poor vegetative cover for both vole species, whereas bluegrass provides intermediate food and vegetative cover. Preferred food resources were very low, especially for M. ochrogaster, and vegetative cover was very dense in tallgrass prairie. Maximum and mean population densities of M. ochrogaster were highest in alfalfa, intermediate in bluegrass, and lowest in tallgrass prairie. …

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Early History Of The Wolf, Black Bear, And Mountain Lion In Arkansas, Annalea K. Bowers, Leah D. Lucio, David W. Clark, Susan P. Rakow, Gary A. Heidt Jan 2001

Early History Of The Wolf, Black Bear, And Mountain Lion In Arkansas, Annalea K. Bowers, Leah D. Lucio, David W. Clark, Susan P. Rakow, Gary A. Heidt

Journal of the Arkansas Academy of Science

During the nineteenth century settlement of Arkansas, the red wolf (Canis rufos), black bear (Ursus americanus), and mourtain lion (Puma concolor) were not only the three largest and most dangerous predators, they also stirred the imaginations of explorers and settlers. References to these species appeared prominently in the journals of early explorers such as George W. Featherstonhaugh (1844) and Frederick Gerstaecker (1854), and their presence inspired voluminous collections of stories and tall tales. Black bears were so common that a large trade developed in pelts, oil, and other body parts, and Arkansas became commonly known as "The Bear State." Wolves …

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Perceived Damage By Elk In The Arkansas Ozarks, Jennifer H. Herner-Thogmartin, Kimberly G. Smith, Michael E. Cartwright Jan 2001

Perceived Damage By Elk In The Arkansas Ozarks, Jennifer H. Herner-Thogmartin, Kimberly G. Smith, Michael E. Cartwright

Journal of the Arkansas Academy of Science

Wildlife managers in Arkansas are faced with managing a growing population of Rocky Mountain elk (Cervus elaphus neloni) that has extended its range to incorporate private lands near the Buffalo National River (BNR) in northcentral Arkansas. This range expansion has created conflicts between private landowners and wildlife management personnel. To document the extent of damage and assess attitudes of landowners with elk on their land, interviews were conducted with landowners who contacted us or the Arkansas Game and Fish Commission about problems with elk. A survey also was created and sent to landowners who live near the BNR in Boone …

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Life History Of The River Shiner, Notropis Blennius (Cyprinidae), In The Arkansas River Of Western Arkansas, Laura Hudson, Thomas M. Buchanan Jan 2001

Life History Of The River Shiner, Notropis Blennius (Cyprinidae), In The Arkansas River Of Western Arkansas, Laura Hudson, Thomas M. Buchanan

Journal of the Arkansas Academy of Science

The reproductive cycle, food habits, and age and growth of the river shiner, Notropis blennius (Girard), in the Arkansas River of western Arkansas were studied from May 1996 through October 1997. Based on gonadosomatic indices and mean ovumd iameters of females, tubercle development in males, and the first appearance of young-of-year in samples, the breeding season extended from June through August in both 1996 and 1997. The river shiner is a diurnal, generalist feeder that forages on a wide variety of food items. In all four seasons, detritus dominated the diets of adults and juveniles in terms of volume and …

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Breeding Season Distribution Of Cerulean Warblers In Arkansas In The 1990s, Douglas A. James, Christopher J. Kellner, Jan Self, Jerry Davis Jan 2001

Breeding Season Distribution Of Cerulean Warblers In Arkansas In The 1990s, Douglas A. James, Christopher J. Kellner, Jan Self, Jerry Davis

Journal of the Arkansas Academy of Science

The Cerulean Warbler (Dendroica cerulea) has been declining in numbers in its North American nesting range, and the same is true in Arkansas. To provide specific sites that can be monitored in the future, this study describes places where the bird was documented in the state in the 1990s. The warbler was found in mature deciduous forest in both upland and bottomland situations but was most abundant in the upland Ozark forests and uncommon in other regions of the state. Most (70%) of the occupied sites were on federal and state lands. Pattern of overall distribution was essentially the same …

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Identification Of Florida Largemouth Bass Alleles In Arkansas Public And Private Aquaculture Ponds, Ronald L. Johnson, Randall Staley Jan 2001

Identification Of Florida Largemouth Bass Alleles In Arkansas Public And Private Aquaculture Ponds, Ronald L. Johnson, Randall Staley

Journal of the Arkansas Academy of Science

The Florida subspecies of the largemouth bass (LMB) has often been introduced into waters outside of its range, with escape of individuals into associated waterways common. Sustaining pure lines within controlled hatchery settings is also difficult. The present study investigated LMB populations by way of allozyme analysis of three diagnostic loci of 115 LMB in three public and seven private aquaculture ponds within Arkansas. The goal was to determine the success of hatcheries in maintaining pure subspecies. None of the pond populations studied were fixed for all alleles. Private ponds had northern LMB allele frequencies of up to 0.40 in …

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Distribution Of Leconte's Free-Tailed Bat (Tadarida Brasiliensis Cynocephala) In Arkansas, With Notes On Reproduction And Natural History, David A. Saugey, D. Blake Sasse, J. D. Wilhide, Drew Reed, Tammy R. Jones, Darrell R. Heath, Daniel R. England Jan 2001

Distribution Of Leconte's Free-Tailed Bat (Tadarida Brasiliensis Cynocephala) In Arkansas, With Notes On Reproduction And Natural History, David A. Saugey, D. Blake Sasse, J. D. Wilhide, Drew Reed, Tammy R. Jones, Darrell R. Heath, Daniel R. England

Journal of the Arkansas Academy of Science

During the past 20 years (1982-2001) we have studied the biology, occurrence and distribution of LeConte's (Brazilian) free-tailed bat, Tadarida brasiliensis cynocephala, in Arkansas. Colonies and individuals were reported from man made structures only. Four new county records have been documented since 1988, extending the range from the central part of the state to Arkansas's northern-most tier of counties. Numerous nuisance maternity colonies were investigated during exclusion activities and one, year-round colony provided the majority of reproductive data. A total of 152 free-tailed bats was submitted to the Arkansas Department of Health Rabies Laboratory (1982-2001); most during February through April, …

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Results Of A Bat Survey In The Western Ozark National Forest, Michelle L. Caviness, Douglas A. James Jan 2001

Results Of A Bat Survey In The Western Ozark National Forest, Michelle L. Caviness, Douglas A. James

Journal of the Arkansas Academy of Science

No abstract provided.

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New Records Of The Woodchuck (Marmota Monax) From Southern Arkansas, C. Renn Tumlison, Anna Smith, Randy Frazier Jan 2001

New Records Of The Woodchuck (Marmota Monax) From Southern Arkansas, C. Renn Tumlison, Anna Smith, Randy Frazier

Journal of the Arkansas Academy of Science

No abstract provided.

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Using Habitat Characteristics And Predictive Gis Modelling To Aid In Conserving The Heath Mouse (Pseudomys Shortridgei) In Lake Magenta Nature Reserve, Kirsty Quinlan Jan 2001

Using Habitat Characteristics And Predictive Gis Modelling To Aid In Conserving The Heath Mouse (Pseudomys Shortridgei) In Lake Magenta Nature Reserve, Kirsty Quinlan

Theses : Honours

The Heath Mouse (Pseutlomys shortridgei) was formerly widely distributed in Western Australia and Victoria. However, now it is known only to exist in areasof fragmented habitat. Heath Mouse populations have not been investigated in Western Australia, as it was thought to be extinct in the state until its rediscovery in 1987. It is known from only tour locations, and from these, the highest numbers known are probably the 18 captures of this mouse from five years of trapping in Lake Magenta Nature Reserve. Given the few numbers of Heath Mice, the purpose of this study was to identify …

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Effect Of Water Temperature On Growth Of Hatchery Reared Black Sea Turbot, Scophthalmus Maximus (Linnaeus, 1758), Temel Şahi̇n Jan 2001

Effect Of Water Temperature On Growth Of Hatchery Reared Black Sea Turbot, Scophthalmus Maximus (Linnaeus, 1758), Temel Şahi̇n

Turkish Journal of Zoology

A rearing experiment was carried out to examine the effect of water temperature on the growth of the Black Sea turbot, Scophthalmus maximus, at ambient temperature (mean 15.2±0.6°C), 18, 20, 22 and 24°C with fish of 34.4±9.9 g initial body weight. The experiment lasted 30 days and the fish were fed to satiation three times a day with a commercial pelleted diet. Survival rates starting with the control group were 100, 83.4, 68.4, 3.4, and 1.7%, respectively. Although the mean weights of the groups were very similar at the beginning of the experiment, they had become markedly varied by the …

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The Herpetofauna Of The Vicinity Of Silifke, İbrahi̇m Baran, Yusuf Kumlutaş, Kurtuluş Olgun, Çeti̇n Ilgaz, Yakup Kaska Jan 2001

The Herpetofauna Of The Vicinity Of Silifke, İbrahi̇m Baran, Yusuf Kumlutaş, Kurtuluş Olgun, Çeti̇n Ilgaz, Yakup Kaska

Turkish Journal of Zoology

The number of herpetological studies about specific regions of Turkey are very limited compared to general herpetological studies. In an attempt to help fill this gap, a total of 89 specimens representing 11 reptile species were collected, for the first time, from two different localities in the vicinity of Silifke, and they were evaluated from the taxonomical point of view.

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The Agathidinae (Hymenoptera: Braconidae) Fauna Of The Marmara Region, Özlem Çeti̇n, Ahmet Beyarslan Jan 2001

The Agathidinae (Hymenoptera: Braconidae) Fauna Of The Marmara Region, Özlem Çeti̇n, Ahmet Beyarslan

Turkish Journal of Zoology

This study was carried out to determine the species of the subfamily Agathidinae (Hymenoptera: Braconidae) in the Marmara region of Turkey. Samples were collected from 47 localities between 1985 and 1997. A total of 16 species were determined. The results revealed that Agathis fulmeki Fischer and Bassus linguarius (Nees von Esenbeck) are new records for the Turkish fauna. Agathis malvacearum Latreille, A. lugubris (Foerster, 1862) and Baeognatha armeniaca Telenga are new records for the Marmara region. A. syngenesiae Nees von Esenbeck, A. umbellatarum Nees von Esenbeck, A. nigra Nees von Esenbeck, A. breviseta Nees von Esenbeck, A. assimilis Kokujev, A. …

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Anomurans Of The Aegean Coasts Of Turkey And Reported Species From Turkish Seas, Cengi̇z Koçak, Tuncer Katağan, Ahmet Kocataş Jan 2001

Anomurans Of The Aegean Coasts Of Turkey And Reported Species From Turkish Seas, Cengi̇z Koçak, Tuncer Katağan, Ahmet Kocataş

Turkish Journal of Zoology

The Anomurans of the Aegean coasts of Turkey were studied between 1987 and 1997, in the region from the Gulf of Saros in the north to Marmaris in south at 17 stations; the 811 specimens obtained were identified as belonging to 28 species. Moreover, all of the early studies were reviewed on the Anomuran fauna of Turkish coasts and it was determined that 3 _species were reported from the Black Sea coasts of Turkey, 20 species from the Sea of Marmara, 27 species from the Aegean coasts of Turkey and 17 species from the Turkish coasts of the Mediterranean Sea. …

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New Host And Geographic Records For Two Protostrongylids In Dall's Sheep, Susan J. Kutz, A. M. Veitch, Eric P. Hoberg, B. T. Elkin, Emily J. Jenkins, L. Polley Jan 2001

New Host And Geographic Records For Two Protostrongylids In Dall's Sheep, Susan J. Kutz, A. M. Veitch, Eric P. Hoberg, B. T. Elkin, Emily J. Jenkins, L. Polley

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Biodiversity survey and inventory have resulted in new information on the distribution of Protostrongylidae in Dall’s sheep (Ovis dalli dalli) from the Northwest Territories (Northwest Territories, Canada) and from Alaska (Alaska, USA). In 1998, Parelaphostrongylus odocoilei adults were found for the first time in the skeletal muscles of Dall’s sheep in the Mackenzie Mountains (Northwest Territories). Adult P. odocoilei were associated with petechial and ecchymotic hemorrhages and localized myositis; eggs and larvae in the lungs were associated with diffuse granulomatous pneumonia. Experimental infections of the slugs Deroceras laeve and Deroceras reticulatum with dorsal-spined first-stage larvae assumed to be …

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Onchocercosis In Red Deer (Cervus Elaphus) From Spain, Mónica Santín-Durán, José M. Alunda, Eric P. Hoberg Jan 2001

Onchocercosis In Red Deer (Cervus Elaphus) From Spain, Mónica Santín-Durán, José M. Alunda, Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Onchocercosis, caused by Onchocerca flexuosa, was observed in red deer (Cervus elaphus) from Spain for the first time. Adult specimens of O. flexuosa were found in nodules in subcutaneous tissues in 42 of 125 (33%) red deer between October 1994 and September 1995; intensity of infection 6 SD was 3.93 ± 5.26 nodules per infected host. A clear seasonal pattern in the distribution of nodules was observed, with higher values of prevalence and intensity in fall and winter in contrast to spring and summer. Significant differences were found among age groups in prevalence, but not in the …

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Reward Frequency: Effects On Flower Choices Made By Different Honeybee Races In Turkey, İbrahi̇m Çakmak, Harrington Wells Jan 2001

Reward Frequency: Effects On Flower Choices Made By Different Honeybee Races In Turkey, İbrahi̇m Çakmak, Harrington Wells

Turkish Journal of Zoology

We compared the European honeybee races Apis mellifera armeniaca, A.m. caucasica, A.m. cypria, and A.m. syriaca. These subspecies are endemic to very different habitats. Additionally, they are exposed to very different levels of predation. A.m. caucasica exists where honeybee predators typically are rare, while the remaining subspecies have ranges that coincide with areas where honeybee predators are abundant. Foraging decisions of workers visiting artificial flower patches containing blue, white, and yellow flowers were recorded. We tested whether foragers responded to differences in rewarding flower frequency among flower color morphs. Division of labor occurred among foragers of each race; some bees …

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A Study On The Feeding Biology Of Laudakia (=Agama) Stellio (L. 1758) (Lacertilia: Agamidae) Populations In The Antalya Region, Serdar Düşen, Mehmet Öz Jan 2001

A Study On The Feeding Biology Of Laudakia (=Agama) Stellio (L. 1758) (Lacertilia: Agamidae) Populations In The Antalya Region, Serdar Düşen, Mehmet Öz

Turkish Journal of Zoology

The feeding biology of Laudakia (=Agama) stellio (L. 1758) was studied using 91 specimens collected from the Antalya region over two consecutive years (1995 and 1996). A total of 1224 prey items were identifed and their frequency of occurrence and percent of diet were tabulated. The majority of the diet consisted of the class Insecta (99.18%), and within this class, Hymenoptera (72.21%) was the major order represented, primarily by the families Formicidae (49.83%) and Apidae (16.74%). In addition to insects, L. stellio feeds on plant material, insect larvae and eggs, and even snails, showing opportunist feeding behavior.

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The Effects Of Cold Storage On The Adult Longevity, Fecundity And Sex Ratio Of Apanteles Galleriae Wilkinson (Hym.: Braconidae), Fevzi̇ Uçkan, Adem Gülel Jan 2001

The Effects Of Cold Storage On The Adult Longevity, Fecundity And Sex Ratio Of Apanteles Galleriae Wilkinson (Hym.: Braconidae), Fevzi̇ Uçkan, Adem Gülel

Turkish Journal of Zoology

The effect of cold storage on the adult longevity, fecundity and sex ratio of Apanteles galleriae Wilkinson, a koinobiont, solitary and early instar larval endoparasitoid of the Small Wax Moth Achoria grisella Fabr. was investigated. The rearing of both parasitoid and host cultures and experiments related to the effect of storing Apanteles galleriae adults at low temperature (+ 6°C) were conducted at 25 ± 1°C, 60 ± 5% RH under a photoperiod of 12:12 (L:D). Cold storage (+ 6°C) considerably influenced the adult longevity, fecundity and sex ratio of the parasitoid. Experimental evidence showed that 85.27% of adults died after …

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Ultrastructural Observations On The Development Of Some Actinosporean Types Within Their Oligochaete Hosts, Ahmet Özer, Rodney Wootten Jan 2001

Ultrastructural Observations On The Development Of Some Actinosporean Types Within Their Oligochaete Hosts, Ahmet Özer, Rodney Wootten

Turkish Journal of Zoology

Synactinomyxon type 1, aurantiactinomyxon type 3, echinactinomyxon type 5 and raabeia type 4 were studied at the TEM level in order to determine the developmental stages within their oligochaete hosts. All the actinosporean types studied had uninucleate cells as the earliest stage of development. The formation of a subsequent binucleate cell stage was either due to the division of the nucleus in a uninucleate cell or the plasmogamy of two uninucleate cells. The earliest pansporocyst formation seen was two outer somatic cells surrounding two inner generative \alpha and \beta cells in all the actinosporean types studied. However, the formation of …

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Histological Study Of The Organogenesis Of The Digestive System And Swim Bladder Of The Chalcalburnus Tarichi Pallas, 1811 (Cyprinidae), Güler Ünal, Osman Çeti̇nkaya, Ertuğrul Kankaya, Mahmut Elp Jan 2001

Histological Study Of The Organogenesis Of The Digestive System And Swim Bladder Of The Chalcalburnus Tarichi Pallas, 1811 (Cyprinidae), Güler Ünal, Osman Çeti̇nkaya, Ertuğrul Kankaya, Mahmut Elp

Turkish Journal of Zoology

The histological development of the digestive system and swim bladder of Chalcalburnus tarichi larvae and their histology in adults were studied under light microscopy. After hatching, the digestive tract is a simple undifferentiated tube. Exogenous feeding started on the 6th day. The yolk sac was absorbed completely on the 9th day. The goblet cells appeared first in the bucco-pharyngeal cavity and oesophagus on the 4th day, in the anterior on the 9th day and in the posterior intestine on the 5th day. The digestive tract was differentiated as the buccal cavity, pharynx, oesophagus post-eosophageal swelling and intestine on the 5th …

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A Study On Endocrine Cells In The Midgut Of Agrotis Segetum (Denn.And Schiff.) (Lepidoptera:Noctuidae), Nursel Gül, Hakki Sayar, Nesri̇n Özsoy, Cevat Ayvali Jan 2001

A Study On Endocrine Cells In The Midgut Of Agrotis Segetum (Denn.And Schiff.) (Lepidoptera:Noctuidae), Nursel Gül, Hakki Sayar, Nesri̇n Özsoy, Cevat Ayvali

Turkish Journal of Zoology

The structure of midgut endocrine cells of Agrotis segetum larvae was examined by light and electron microscopy. It was observed that the endocrine cells were located on the basal lamina and among the columnar epithelial cells of the midgut. The cells were morphologically determined as columnar or coniform. The cytoplasm of endocrine cells was observed to contain rough endoplasmic reticulum, mitochondria, developed Golgi complex, vesicles and numerous small secretory granules. It was also observed that the secretory granules were often located in the basal region of the endocrine cells.

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