Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 17 of 17 for “"catfishes"”.
-
Sound Production in Two Loricariid Catfishes
<p>Many families of catfish produce sounds via pectoral spine stridulation and/or swim bladder compression using sonic muscles attached to the swim bladder. The sound production capabilities and characteristics in Loricariidae, the largest catfish family, have not been well examined. Sounds …
-
A Comparison of the Pectoral Spines in Virginia Catfishes
… of the spine base increase nonlinearly in white catfishes, and dorsal process width increases nonlinearly in wild channel catfish although the increase was linear in cultured channel catfish.Girdle depth increased linearly with total length in all species except for wild channel catfish, and the …
-
Feeding Ecology of Invasive Catfishes in Chesapeake Bay Subestuaries
Blue Catfish Ictalurus furcatus are native to tributaries of the Mississippi River but are now invasive in several Atlantic slope drainages. This includes subestuaries of the Chesapeake Bay, where their feeding ecology and potential impact on native species was largely unknown. We collected stomach …
-
Tests of Adaptive Coloration Hypotheses for Madtom (Notorus) Catfishes (Siluriformes: Ictaluridae)
… color patterns. Madtoms, Noturus, are diminutive catfishes with dorsal and pectoral stings. Thirteen of the 25 nominal species have serrated spines in the pectoral sting and a contrasting pigment pattern. Behavior of two saddled species, N. miurus and N. hildebrandi, and one uniformly colored …
-
The Phylogenetic Relationships Among Extant Catfishes, With Special Reference to Ictaluridae (Otophysi: Siluriformes)
Cytochrome b suggested cryptic diversity within several species of Noturus. Relationships among members of the subgenus Rabida were resolved and in many cases well supported. Relationships among Schilbeodes were poorly resolved. A calibrated substitution rate identified a period between 8 and 2 …
-
Taxonomy of the Neotropical Thorny Catfishes (Siluriformes: Doradidae) and Revision of Genus Leptodoras
Cladistic analysis of relationships among Leptodoras and related taxa (Anduzedoras, Doras, Hassar, Hemidoras) using morphological data recovers Leptodoras praelongus (Myers & Weitzman) as the most ancestral species. The most derived clade is composed of two nominal species, Leptodoras juruensis …
-
Phylogenetic Relationships of the Sucker-Mouth Armored Catfishes (Loricariidae) With Particular Emphasis on the Ancistrinae, Hypostominae, and Neoplecostominae
The genera and tribes of Hemipsilichthiinae, Hypostominae, Neoplecostominae, and Upsilodinae are redescribed and diagnosed. A key is provided for all of the genera of Hemipsilichthiinae, Hypostominae, Lithogeneinae, Neoplecostominae, and Upsilodinae.
-
Exotic Armored Catfishes in Texas: Reproductive Biology, and Effects of Foraging on Egg Survival of Native Fishes (Etheostoma fonticola, Endangered and Dionda diaboli, Threatened)
Armored catfishes (Loricariidae), native to Central and South America, were introduced into North American waters through the aquarium trade, and became established in Texas waters in 1964. There has been concern that breeding populations of these exotics could affect native species through dietary …
-
The Development and Role of Peripheral Auditory Structures in <i>Otocinclus affinis</i>
Loricariidae is a very diverse family of catfishes found primarily in the Amazon River basin. These catfishes have a unique characteristic feature of having fenestrae (holes) in the skull region (compound pterotic bone) adjacent to their bi-lobed swim bladder. Since the swim bladders and the …
-
Ecology, Growth, and Migration of Pseudoplatystoma fasciatum in the Amazon Basin
… an estimated 4,475 species within 71 families. Catfishes of the Order Siluriformes include 39 families with 498 accepted genera and 4,123 species. More specifically, members of the Family Pimelodidae, the long-whiskered catfishes, and the genus Pseudoplatystoma are distributed from South America …
-
Characterizing a Hidden Fishery: Setline Fishing in the New River, Virginia
Catfishes Ictaluridae are important food fish that are harvested from the New River, Virginia by multiple methods, yet standard creel survey approaches do not accurately sample setline effort, a popular fishing gear for catfish. I characterized the New River setline fishery by estimating setline …
-
The Aging of Two Madtom Catfish Species From a Southwest Missouri Stream
… In this study two species of madtom catfishes, the slender madtom (Noturus exilis) and the Ozark madtom (Noturus albater), were aged using pectoral spines and otoliths. Validation was provided using marginal increment analysis, a technique which monitors the seasonal progression of …
-
Life history of the endangered fine-rayed pigtoe pearly mussel, Fusconaia cuneolus (Lea, 1840), in the Clinch River, Virginia
… (Cottus bairdi). Tested species of sunfishes, catfishes, and darters did not serve as hosts. Age and growth characteristics were obtained by thin-sectioning shells collected in muskrat middens at Slant and Pendleton Island, Virginia. As predicted by the von Bertalanffy equation, the fine-rayed …
-
Systematic revision of the South American armored catfish genus Loricaria (Siluriformes: Loricariidae)
… teeth. Loricaria are small to moderate-sized catfishes widely distributed throughout most of the major river drainages of cis-Andean South America, including the Amazon, Orinoco, Paraguay, Paraná, and smaller coastal rivers draining the Guyana and Brazilian Shields. Based on multivariate …
-
An ecosystem-based approach to balancing cage aquaculture, capture fisheries, and biodiversity conservation in Lake Victoria, Kenya
… In the gulf's eutrophic waters, indigenous catfishes and cyprinids were abundant, while Nile perch and haplochromines were abundant in the open less eutrophic waters. Along the inner gulf-open lake gradient, Nile perch population structure, size at 50% maturity, and feeding patterns …
-
Upper Missouri River Basin Aquatic GAP Fish Distribution Model Accuracy Assessment and White Sucker, Catostomus commersonii, Population Characteristics in the Upper Missouri River Basin
… by suckers (family Catostomidae, 6.5%), and catfishes (Ictaluridae, 5.7%). Of the 21,204 fish collected, fathead minnow Pimephales promelas (40.9%), unidentified Hybognathus spp. (9.8%), and longnose dace Rhinichthys cataractae (7.8%) were the dominant species. Important findings include: the …