A5078103523- Fish Ecology and Management Studies
- Fish Biology and Ecology Studies
- Fish biology, ecology, and behavior
- Aquatic Ecosystems and Biodiversity
- Aquatic Invertebrate Ecology and Behavior
- Parasite Biology and Host Interactions
- Marine and fisheries research
- Parasites and Host Interactions
- Genetic diversity and population structure
- Aquaculture Nutrition and Growth
- Environmental DNA in Biodiversity Studies
- Animal Behavior and Reproduction
- Ichthyology and Marine Biology
- Physiological and biochemical adaptations
- Freshwater macroinvertebrate diversity and ecology
- Global Maternal and Child Health
- Hydrology and Sediment Transport Processes
- Wildlife Ecology and Conservation
- Identification and Quantification in Food
- Ecology and biodiversity studies
- Species Distribution and Climate Change
- Vector-Borne Animal Diseases
- Helminth infection and control
- Hemiptera Insect Studies
- Amphibian and Reptile Biology
Pennsylvania State University
2016-2025
South African Institute for Aquatic Biodiversity
2016-2025
Universities UK
2024
Pennsylvania Department of Education
2023-2024
Park University
2023-2024
Ecosystem Sciences
1996-2017
Indiana State Department of Health
2013
Virginia Tech
1974-2006
Skidmore College
2003
University of Massachusetts Amherst
1998-2003
Background. Variant influenza virus infections are rare but may have pandemic potential if person-to-person transmission is efficient. We describe the epidemiology of a multistate outbreak an A(H3N2) variant (H3N2v) first identified in 2011.
Selected temperatures increased for 15 fish species in a laboratory gradient when acclimated to 3 °C increments from 12 27 °C. Temperature preferences exceeded acclimation between all except the telescope shiner (Notropis telescopus), yellow perch (Perca flavescens), rainbow trout (Salmo gairdneri), brown trutta), and brook (Salvelinus fontinalis). At 30, 33, or 36 acclimation, preferred were less than temperature. The highest temperature occurred at acclimations of 27, 33 Bluegill (Lepomis...
Lake Malaŵi is known for its endemic haplochromine species flock, most notably the rock-dwelling cichlids as mbuna. The group of mbuna referred to Pseudotropheus elongatus currently comprised Metriaclima spp., Tropheops Cynotilapia and spp. In this study, Chindongo, a new genus with type C. bellicosus, described additional in group. Chindongo distinguished from other genera by 1) presence bicuspid teeth anterior portion outer row both upper lower jaw; 2) moderately steeply sloped vomer...
Pseudotropheus livingstonii and P. elegans are two sand-dwelling cichlid species that belong to the so-called mbuna, a group of predominantly rock-dwelling haplochromines Lake Malaŵi. The identity these has confused taxonomists for almost century until recent rediscovery representatives close its type locality. New diagnoses both provided.
The present study describes Serranochromis alvum n. sp., swartzi cuanza and cacuchi sp. from Angolan tributaries of the Cuanza Okavango systems in Angola. presence four or five scale rows between posterior margin orbit ascending arm preoperculum, widely set unicuspid teeth on jaws, separated gill rakers, anal fins with egg ocelli place these species Serranochromis. described herein are distinguishable based a combination morphological meristic characters, as well pigmentation patterns....
The genotypes of two microsatellite loci were determined for the mouthbrooded progeny 13 females, representing seven species both rock- and sand-dwelling Lake Malawi cichlid fishes. Multiple paternity is clearly demonstrated all but broods. One brood contained at least six males. Heterozygosity these in a sample 18 male Copadichromis cyclicos was 89% 83%, respectively. Each locus displayed 16 alleles among expected average exclusion probability using loci, given mother/offspring pair, 0.968,...
The hypothesis that male reproductive success of a lekking species depends on the size display site was investigated. For Cyrtocara eucinostomus, height bower appears to be crucial characteristic used by females in determining with which males court and eventually spawn. In this study, more vigorously defended, were less likely abandon, taller bowers. This pattern consistent at all depths, although showed peak density bowers 6.0-7.5 m depth. lower-depth distribution is probably due nocturnal...
Serranochromis robustus from Lake Malaŵi and jallae Zambia were compared using morphological data. We re-elevated S. to species based on the following. generally has a longer lower jaw (50.7–59.6% HL) than (49.2–52.7% HL). is not as deep-bodied evidenced by distance between posterior insertion of dorsal fin anal (13.4–15.1% SL in vs. 14.9–18.4% jallae). Additionally, narrower least caudal peduncle depth (10.9–12.8% SL) (11.3–14.2% SL); all was less 12.8% while, except for smallest specimen...
Metriaclima is the most speciose genus of rock-dwelling fishes (mbuna) found in Lake Malai with 32 described species and about 40 recognized forms that still await formal description. The comprised many geographically narrow populations restricted to specific habitat landmarks, such as reefs or islands. A few have taken open sandy where empty gastropod shells provide shelter. Two shell-dwellers are here new. combination a black submarginal band dorsal anal fins five fewer bars on flank...
Extremely fine–scale genetic partitioning has recently been detected among populations of Lake Malawi's rock–dwelling cichlids through the study microsatellite loci. Understanding mechanisms differentiation that operate in this rapidly speciating group requires further investigation geographic patterns gene flow and congruence between morphological divergence. In pursuit goal, variation at four loci male breeding coloration were examined several Labeotropheus fuelleborni from southern...
Journal Article African Tilapia in Lake Nicaragua: Ecosystem transition Get access Kenneth R. McKaye, McKaye Search for other works by this author on: Oxford Academic Google Scholar Joseph D. Ryan, Ryan Jay Stauffer, Jr., Jr. Lorenzo J. Lopez Perez, Perez Gabriel I. Vega, Vega Eric P. van den Berghe BioScience, Volume 45, Issue 6, June 1995, Pages 406–411, https://doi.org/10.2307/1312721 Published: 01 1995
Abstract Of the 46 species of foreign fishes known to be established as reproducing populations in open waters contiguous United States, approximately 65% are or presumed have originated from aquarium fish trade. Many escaped were released culture facilities and some introduced by aquarists. More than 50 additional, non‐established fishes, mostly species, been collected wild. These introductions, with populations, not restricted so‐called Sun Belt states, but occurred throughout U.S. Because...
Abstract Phenotypic plasticity is the capacity of an organism's phenotype to vary in different environments. Although diet-induced phenotypic has been documented New World cichlids, it hypothesised that this type would be limited certain Old because morphological constraints on jaw imposed by mouth-brooding. This hypothesis was experimentally tested determining effect diets head and morphology split broods several species haplochromine cichlids from Lake Malaŵi, Africa, two...
The mechanisms that underlie the diversity of cichlids in East African Great Lakes are poorly understood. Sexual selection through female choice based on male body coloration has often been suggested as a driving force behind speciation these fishes. objectives this study were to investigate, mate trials, cues guide species-isolating choice. In group sympatric Lake Malawi mbuna (rock-dwelling fish), we investigated both visual and chemical might by giving gravid females between...
Summary 1. Human activities affect fish assemblages in a variety of ways. Large‐scale and long‐term disturbances such as in‐stream dredging mining alter habitat hydrodynamic characteristics within rivers which can, turn, distribution. Habitat heterogeneity is decreased the natural riffle–pool–run sequences are lost to continuous pools and, consequence, lotic species displaced by lentic species, while generalist invasive displace native specialists. Sediment organic detritus accumulate deep,...