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Articles 7591 - 7620 of 10523

Full-Text Articles in Zoology

Effect Of Copper Chloride On The Enzyme Activities Of The Crab Sesarma Quadratum (Fabricius), Santhana Valarmathi, Jayapaul Azariah Jan 2003

Effect Of Copper Chloride On The Enzyme Activities Of The Crab Sesarma Quadratum (Fabricius), Santhana Valarmathi, Jayapaul Azariah

Turkish Journal of Zoology

A series of experimental studies indicated that copper as a toxicant causes a disturbance in enzyme activity. Stress conditions impose forced anaerobic conditions in the muscle, gill and hepatopancreas tissues of the crab Sesarma quadratum when exposed to two sublethal concentrations of 1/10 [2.8 ppm (Exp. 1)] and 1/3 [9.3 ppm (Exp. 2)] copper chloride for 21 d. Lactate dehydrogenase (LDH) activity was significantly elevated in muscle and hepatopancreas tissues whereas succinate dehydrogenase (SDH) activity was suppressed in the crab tissues of the muscle, gills and hepatopancreas for 21 d.

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A New Distributional Checklist Of Minnesota Fishes, With Comments On Historical Occurrence, Jay T. Hatch, Konrad P. Schmidt, Dann P. Siems, James C. Underhill, Robert A. Bellig, Richard A. Baker Jan 2003

A New Distributional Checklist Of Minnesota Fishes, With Comments On Historical Occurrence, Jay T. Hatch, Konrad P. Schmidt, Dann P. Siems, James C. Underhill, Robert A. Bellig, Richard A. Baker

Journal of the Minnesota Academy of Science

Historical documents, Minnesota Department of Natural Resources stream surveys, and the 66,000 record distributional database of the James Ford Bell Museum of Natural History (1879-2002) were used to produce a field-usable checklist of the 160 fish species known from Minnesota waters and waters shared with its boundary states and Canadian provinces. The checklist includes distribution by eight major drainages, the conservation status for each species, and reference to nomenclatural changes over the past 20 years. Fishes are arranged according to the latest interpretations of phylogenetic relationships among species and supraspecific taxa. New distributional information is presented for six species introduced …

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First Record Of Neognathus Terrestris (Acari, Caligonellidae) In Turkey, Sali̇h Doğan, Nusret Ayyildiz Jan 2003

First Record Of Neognathus Terrestris (Acari, Caligonellidae) In Turkey, Sali̇h Doğan, Nusret Ayyildiz

Turkish Journal of Zoology

In the present work, on the basis of specimens collected from Erzurum, the characteristic features and the figures of Neognathus terrestris, recorded for the first time from Turkey, have been given.

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Systematical Studies On Megabombus (Apidae: Hymenoptera) Species In Central Anatolia, Ahmet Murat Ayteki̇n, Neşe Çağatay Jan 2003

Systematical Studies On Megabombus (Apidae: Hymenoptera) Species In Central Anatolia, Ahmet Murat Ayteki̇n, Neşe Çağatay

Turkish Journal of Zoology

Some species from the genus Megabombus in Central Anatolia were considered. Eight species were determined from the subgenera Thoracobombus, Rhodobombus and Megabombus (s. str.) by both classical and morphometrical systematics. Synonymies, Turkish and general distributions and detailed drawings of the dorsal view of the male genitalia were given. As a result of the phenograms obtained from 39 different morphological characters examined statistically, the subgenus Megabombus was shown to be a natural group.

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Gyratrix Hermaphroditus: A State Record For Arkansas, Jane Dunn Jan 2003

Gyratrix Hermaphroditus: A State Record For Arkansas, Jane Dunn

Journal of the Arkansas Academy of Science

No abstract provided.

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Growth And The Expression Of Alternative Life Cycles In The Salamander Ambystoma Talpoideum (Caudata: Ambystomatidae), Travis J. Ryan, Raymond D. Semlitsch Jan 2003

Growth And The Expression Of Alternative Life Cycles In The Salamander Ambystoma Talpoideum (Caudata: Ambystomatidae), Travis J. Ryan, Raymond D. Semlitsch

Scholarship and Professional Work - LAS

Complex life cycles (CLCs) contain larval and adult phases that are morphologically and ecologically distinct. Simple life cycles (SLCs) have evolved from CLCs repeatedly in a wide variety of lineages but the processes that may underlie the transition have rarely been identified or investigated experimentally. We examined the influence of larval growth rate on the facultative expression of alternative life cycles (metamorphosis or maturation as gill-bearing adults [= paedomorphosis]) in the salamander Ambystoma talpoideum. We manipulated growth rates by altering the amount of food individuals received throughout larval development. The expression of alternative life cycles in A. talpoideum is influenced …

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Experimental Channel Catfish Virus Infection Mimics Natural Infection Of Channel Catfish, Robin L. Stingley, Wayne L. Gray, Billy R. Griffin, Reid Landes Jan 2003

Experimental Channel Catfish Virus Infection Mimics Natural Infection Of Channel Catfish, Robin L. Stingley, Wayne L. Gray, Billy R. Griffin, Reid Landes

Journal of the Arkansas Academy of Science

Channel catfish virus (CCV) causes a severe hemorrhagic disease in channel catfish fry and fingerlings. CCV epizootics are associated with elevated water temperatures and high mortality rates. Survivors of acute disease are latently infected with i virus. In this study, we investigated conditions effecting CCV pathogenesis and latency utilizing an experimental immersion model to simulate natural infection and a population of Arkansas catfish verified to have no prior CCV exposure, the results indicate that the Auburn- 1 laboratory strain is comparable to CCV field isolates in virulence and ability to establish latent infection. The study confirms that water temperature and …

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Subterranean Biodiversity Of Arkansas, Part 2: Status Update Of The Foushee Cavesnail, Amnicola Cora Hubricht, 1979 (Mollusca: Gastropoda: Hydrobiidae), G. O. Graening Jan 2003

Subterranean Biodiversity Of Arkansas, Part 2: Status Update Of The Foushee Cavesnail, Amnicola Cora Hubricht, 1979 (Mollusca: Gastropoda: Hydrobiidae), G. O. Graening

Journal of the Arkansas Academy of Science

No abstract provided.

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Genetic Similarity Of Shadow And Arkansas Basses (Ambloplites) Determined By Mitochondrial Dna Analysis, Ronald L. Johnson, Carrie F. Cavenaugh Jan 2003

Genetic Similarity Of Shadow And Arkansas Basses (Ambloplites) Determined By Mitochondrial Dna Analysis, Ronald L. Johnson, Carrie F. Cavenaugh

Journal of the Arkansas Academy of Science

No abstract provided.

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Application Of Gene Transfer Technology For Genetic Improvement Of Fish, Ali̇ye Sarmaşik Jan 2003

Application Of Gene Transfer Technology For Genetic Improvement Of Fish, Ali̇ye Sarmaşik

Turkish Journal of Zoology

The worldwide decline of natural fish stocks, the accumulation of chemical pollutants in aquatic environments and increasing world consumption of fish products has provided an impetus in many countries for a rapid growth in aquaculture. Fish produced from aquaculture currently account for over one-fourth of fish consumed by humans. However, success in aquaculture mainly depends on breeding, feeding and protection from disease. Application of recombinant DNA technology in aquaculture can help to improve these requirements.

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Investigations Into Discourella Modesta (Leonardi, 1899) (Acari: Mesostigmata: Uropodina), A New Species For Turkey, Durmuş Ali̇ Bal, Muhli̇s Özkan Jan 2003

Investigations Into Discourella Modesta (Leonardi, 1899) (Acari: Mesostigmata: Uropodina), A New Species For Turkey, Durmuş Ali̇ Bal, Muhli̇s Özkan

Turkish Journal of Zoology

In this study, developmental stages of D. modesta (Leonardi, 1899) females collected from Erzincan province and its surroundings by Bal in 1997-2001 were evaluated. The specimens were examined in the light of previous studies. Earlier definitions, the structural features of females and nymphs, and the localities of the species were reviewed. Original drawings were also made of our specimens.

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Microcrustacean Fauna Of Lake Sazlıgöl (Menemen, İzmir), Mustafa Ruşen Ustaoğlu, Süleyman Balik, Di̇dem Özdemi̇r Mi̇s, Cem Aygen Jan 2003

Microcrustacean Fauna Of Lake Sazlıgöl (Menemen, İzmir), Mustafa Ruşen Ustaoğlu, Süleyman Balik, Di̇dem Özdemi̇r Mi̇s, Cem Aygen

Turkish Journal of Zoology

Thirty-five microcrustacean taxa, comprising 21 species of cladocerans, eight species and one subspecies of copepods, and five species of ostracods were identified from Lake Sazlıgöl during a 17-month research period in 1998-1999. Of these species, Eucypris ornata (Müller, 1776) (Ostracoda) was recorded as new species for the freshwater fauna of Turkey.

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A Study On The Ornithofauna Of Sakaryabaşı/Eminekin Pond And Its Vicinity, Azi̇z Aslan, İlhami̇ Ki̇zi̇roğlu Jan 2003

A Study On The Ornithofauna Of Sakaryabaşı/Eminekin Pond And Its Vicinity, Azi̇z Aslan, İlhami̇ Ki̇zi̇roğlu

Turkish Journal of Zoology

The study was carried out to determine the ornithofauna of Eminekin Pond and its vicinity in Sakaryabaşı, within the district of Çifteler in Eskişehir province. The study area is situated on one of the migration routes of birds. During the study period, from July 1995 to July 1996, a total of 102 bird species from 37 families were observed in the area and 37 of these species were resident, ten of them were winter visitors, forty six were summer visitors and only nine were found to be passage migrants.

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Nine New Naididae (Oligochaeta) Species For Sakarya River, Turkey, Nai̇me Arslan, Yalçin Şahi̇n Jan 2003

Nine New Naididae (Oligochaeta) Species For Sakarya River, Turkey, Nai̇me Arslan, Yalçin Şahi̇n

Turkish Journal of Zoology

The material was collected between September 1995 and August 1998 from 79 stations on Sakarya River. A total of nine Naididae species (Ophidonais serpentina (Müller, 1773), Stylaria lacustris Lamarck, 1816, Nais pardalis Piguet, 1906, Nais variabilis Piguet, 1906, Pristinella jenkinae (Stephenson, 1931), Pristina foreli (Piguet, 1906), P. longiseta longiseta Ehrenberg, 1824, P. proboscidea Beddard, 1896 and P. aequiseta Bourne, 1891) belonging to five genera were recorded for the first time from Sakarya River.

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Some Chilopoda (Myriapoda) Records From The City Of Eskişehir, Mete Misirlioğlu Jan 2003

Some Chilopoda (Myriapoda) Records From The City Of Eskişehir, Mete Misirlioğlu

Turkish Journal of Zoology

Turkey is one of the richest countries in terms of the Chilopoda fauna. However, knowledge of the Chilopoda fauna of some parts of Anatolia is still limited, particularly of Central Anatolia. This study is based on Chilopoda samples collected from two different localities in the city of Eskişehir. Four species belonging to four genera were determined.

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Check List Of The Hydrophilidae (Coleoptera) Species Of Turkey And A New Record For The Turkish Fauna, Ümi̇t İncekara, Abdullah Mart, Orhan Erman Jan 2003

Check List Of The Hydrophilidae (Coleoptera) Species Of Turkey And A New Record For The Turkish Fauna, Ümi̇t İncekara, Abdullah Mart, Orhan Erman

Turkish Journal of Zoology

A check list of Hydrophilidae species known in Turkey is presented for the first time. In addition, their distributions in Turkey are given. Fifty-four species are determined. Of these, Hydrophilus atterimus Eschscholtz, 1822, a new record for the Turkish fauna, is reviewed and compared with H. piceus (Linnaeus, 1758).

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The Parasitoids Of Yponomeuta Malinellus Zeller (Lepidoptera: Yponomeutidae) In Sivas, Lütfi̇ye Gençer Jan 2003

The Parasitoids Of Yponomeuta Malinellus Zeller (Lepidoptera: Yponomeutidae) In Sivas, Lütfi̇ye Gençer

Turkish Journal of Zoology

The objective of this study was to determine parasitoids attacking the apple ermine moth (Yponomeuta malinellus Zeller) in Sivas. Ten parasitoid species belonging to hymenopteran families of Ichneumonidae, Eulophidae, Encrytidae and Elasmidae and a dipteran family Tachinidae were found. Parasitoid guilds, their effect on the population of Yponomeuta malinellus and their importance in biological control are discussed.

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A Study On Micromys Minitus (Pallas, 1771) (Mammalia: Rodentia) In Turkish Thrace, Beytullah Özkan, Nuri̇ Yi̇ği̇t, Ercüment Çolak Jan 2003

A Study On Micromys Minitus (Pallas, 1771) (Mammalia: Rodentia) In Turkish Thrace, Beytullah Özkan, Nuri̇ Yi̇ği̇t, Ercüment Çolak

Turkish Journal of Zoology

Micromys minutus was recorded from six localities in Turkish Thrace. The external, cranial and karyological peculiarities of the specimens were determined. The dorsal colour of the specimens is dark brownish, being lighter on the sides, but the rostrum and cheek are markedly ochre. Mean tail length relative to body length is 90.5%, and the occipito-nasal length is 18.1 mm. The diploid number of chromosomes was 2n = 68 with NF = 136 and NFa = 132.

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A Study On Apodemus Iconicus Heptner, 1948 (Mammalia: Rodentia) In Turkey, Ercüment Çolak Jan 2003

A Study On Apodemus Iconicus Heptner, 1948 (Mammalia: Rodentia) In Turkey, Ercüment Çolak

Turkish Journal of Zoology

The karyological, bacular and phallic aspects of Apodemus iconicus Heptner, 1948, in Turkey were examined for the first time. The diploid number of chromosomes was 2n = 48, the number of autosomal arms was NFa = 46, and the fundamental number was NF = 48. The X chromosome was large acrocentric, and the Y chromosome was small acrocentric. The baculum was composed of a distal and proximal part, the average length of which was 3.74 mm. The phallus showed two notches near the crater, and a groove extending along the phallus on the ventral side.

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Age-Dependent Cranial Variations In Mesocricetus Brandti (Mammalia: Rodentia) Distributed In Turkey, Nuri̇ Yi̇ği̇t Jan 2003

Age-Dependent Cranial Variations In Mesocricetus Brandti (Mammalia: Rodentia) Distributed In Turkey, Nuri̇ Yi̇ği̇t

Turkish Journal of Zoology

Animals were assigned to four age groups according to molar wear, field notes and external and cranial measurements. Six days-old animals were referred to newborn, up to 30 days as young and thereafter as adult; animals with very worn molars were considered old. In addition to the statistical differences among age groups, it was determined that the main morphological differences were in the interorbital constriction, the shape of the braincase, the ridges and the position of occipital condyles. While the incisors and the first molars erupted in seven days-old animals, the second and third molars begun to erupt after seven …

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Cockroach Infestation In Some Hospitals In Trabzon, Turkey, Bi̇lal Kutrup Jan 2003

Cockroach Infestation In Some Hospitals In Trabzon, Turkey, Bi̇lal Kutrup

Turkish Journal of Zoology

The distribution and abundance of cockroaches were investigated in six hospitals in Trabzon. A total of 4756 (692 females, 652 males and 3412 nymphs) cockroaches were caught between 1^{st} October 1999 and 30^{th} January 2000. It was found that three cockroach species were present in hospitals. Of these, Blattella germanica was the predominant species with 98.25%, followed by Blatta orientalis (1.12%) and Periplaneta americana (0.63%). Although the German cockroach, Blattella germanica, was found in all areas of the hospitals, Blatta orientalis and Periplaneta americana were only caught in kitchens. When comparing the population density of German cockroaches in different places …

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The Taxonomy And Distribution Of Apodemus Agrarius (Pallas, 1771) (Mammalia: Rodentia) In The European Part Of Turkey, Haluk Kefeli̇oğlu, Coşkun Tez, İslam Gündüz Jan 2003

The Taxonomy And Distribution Of Apodemus Agrarius (Pallas, 1771) (Mammalia: Rodentia) In The European Part Of Turkey, Haluk Kefeli̇oğlu, Coşkun Tez, İslam Gündüz

Turkish Journal of Zoology

The morphological and karyological characteristics of 27 specimens of Apodemus agrarius (Pallas, 1771) from the European part of Turkey were studied in detail and compared with those in the literature in order to provide a wider perspective on the taxonomic status of Apodemus agrarius in Turkey. In all the samples examined, 2n = 48 karyotype was observed with FN = 56 and FNa = 54. The 2n = 48 karyotype includes three pairs of metacentric, one pair of submetacentric and 19 pairs of acrocentric autosomes. Of the sex chromosomes, the X is a large acrocentric and the Y is a …

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Population Dynamics Of Soft-Furred Field Rat, Millardia Meltada, In Rice And Wheat Fields In Central Punjab, Pakistan, Shaher Bano Lathiya, Abdul Rauf Khokhar, Syed Muzaffar Ahmed Jan 2003

Population Dynamics Of Soft-Furred Field Rat, Millardia Meltada, In Rice And Wheat Fields In Central Punjab, Pakistan, Shaher Bano Lathiya, Abdul Rauf Khokhar, Syed Muzaffar Ahmed

Turkish Journal of Zoology

Data on the abundance, reproduction, diet and damage index of the soft-furred field rat Millardia meltada were collected during the rice and wheat seasons. The abundance of Millardia meltada remained high at the post-harvest stage of the rice and wheat crops. The ploughing of fields did not affect the abundance of Millardia. The mean annual prevalence of pregnancy was 50% and the mean embryonic litter size 6.2 ± 0.4. Millardia continued to eat wheat and rice grains over a long period even when there was no crop standing in the fields. The damage indices in rice and wheat crops were …

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Survival Of The Western Pond Turtle (Emys Marmorata) In An Urban California Environment, Phillip Q. Spinks, Gregory B. Pauly, John J. Crayon, H. Bradley Shaffer Jan 2003

Survival Of The Western Pond Turtle (Emys Marmorata) In An Urban California Environment, Phillip Q. Spinks, Gregory B. Pauly, John J. Crayon, H. Bradley Shaffer

United States Geological Survey: Staff Publications

The western pond turtle Emys (formerly Clemmys marmorata) is declining throughout its range, primarily due to loss of habitat via urbanization and conversion to agriculture. Urban waterways present several important challenges to freshwater turtle populations, but they also present an opportunity to maintain declining species in a ubiquitous habitat that has high public visibility. The arboretum waterway on the University of California, Davis campus is an example of an extensively altered urban habitat that supports a relatively large E. marmorata population. Over the last 6 years, we monitored the turtle population inhabiting the arboretum waterway to determine the …

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Observations On The Mole Vole, Ellobius Lutescens Thomas 1897, (Mammalia: Rodentia) In Turkey, Yüksel Coşkun, Servet Ulutürk Jan 2003

Observations On The Mole Vole, Ellobius Lutescens Thomas 1897, (Mammalia: Rodentia) In Turkey, Yüksel Coşkun, Servet Ulutürk

Turkish Journal of Zoology

Ellobius lutescens is the only species of the genus Ellobius living in eastern Anatolia. They are highly adapted to underground life. There is no knowledge about the ecological peculiarities, population structures or detailed range of this species in Turkey. Data were recorded during field studies and laboratory observations of 42 specimens collected from 12 different localities. The distribution area is 8 km north of Muradiye in the north, the eastern border beyond the Turkish border, 32 km north of Çatak in the south, 5-6 km east of Uysal in the west, and Yüksekova in the southeast, the eastern border beyond …

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Dna Sequence Of Melanocortin 1-Receptor Gene In Coturnix Japonica: Correlation With Three E Locus Alleles—E,E+, And Erh, Rupali Ugrankar, Kim Cheng, Ronald Okimoto Jan 2003

Dna Sequence Of Melanocortin 1-Receptor Gene In Coturnix Japonica: Correlation With Three E Locus Alleles—E,E+, And Erh, Rupali Ugrankar, Kim Cheng, Ronald Okimoto

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

The melanocortin 1-receptor (MC1-R) gene plays a key role in the expression of fur and feather color in mammals and birds by regulating the distribution of two melanin pigments: eumelanin (black/brown) and pheomelanin (red/yellow). MC1-R corresponds to the classical Extension (E) locus in mice, pigs, dogs, horses, and chickens. Three E locus alleles, the wild-type (e+), brown (E), and redhead (erh) have been identified in Japanese quail (Coturnix japonica). To determine if the quail E locus phenotypes were due to variation in the MC1-R gene, the coding region of the MC1-R gene was PCR amplified and DNA sequenced using genomic …

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Reciprocal Translocation Reestablishes Breeding Status Of Mississippi Alluvial Plain Population Of Red-Cockaded Woodpeckers In Arkansas, William C. Holimon, Warren G. Montague Jan 2003

Reciprocal Translocation Reestablishes Breeding Status Of Mississippi Alluvial Plain Population Of Red-Cockaded Woodpeckers In Arkansas, William C. Holimon, Warren G. Montague

Journal of the Arkansas Academy of Science

No abstract provided.

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Status And Distribution Of Freshwater Mussels (Unionacea) Inhabiting The Saline River / Holly Creek Bottoms Area, Saline County, Arkansas, Chris L. Davidson, Dave Gosse Jan 2003

Status And Distribution Of Freshwater Mussels (Unionacea) Inhabiting The Saline River / Holly Creek Bottoms Area, Saline County, Arkansas, Chris L. Davidson, Dave Gosse

Journal of the Arkansas Academy of Science

No abstract provided.

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New Records Of The Eastern Chipmunk (Tamias Striatus) From Arkansas, D. Blake Sasse Jan 2003

New Records Of The Eastern Chipmunk (Tamias Striatus) From Arkansas, D. Blake Sasse

Journal of the Arkansas Academy of Science

No abstract provided.

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Nesting Willow Flycatchers Discovered At Harrison, Arkansas, William C. Holimon, Douglas A. James Jan 2003

Nesting Willow Flycatchers Discovered At Harrison, Arkansas, William C. Holimon, Douglas A. James

Journal of the Arkansas Academy of Science

The Willow Flycatcher, Empidonax traillii (Audubon), was a newly discovered species when John James Audubon found it at Arkansas Post in 1822. The bird was fairly common in summer in prairie-scrub habitat around Arkansas at least until the 1950s. There after numbers declined until one or two individuals were found occasionally at a single site in Benton County in the late 1980s through 1990s. We found a population consisting of three nesting territories on Baker Prairie Natural Area in Harrison, Boone County, Arkansas. This represents the first confirmed nesting since 1990 and only the second since 1969. A nest with …

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