Based on light and scanning electron microscopical studies, three adult spirurid nematode species, Camallanus (Zeylanema) ctenopomae Vassiliadès & Petter, 1972, Paracamallanus cyathopharynx (Baylis, 1923) (both Camallanidae) and Spinitectus polli Campana-Rouget, 1961 (Cystidicolidae), are redescribed from specimens collected in fishes of the Okavango River, Botswana: C. (Z.) ctenopomae from Ctenopoma sp. (Anabantidae), P. cyathopharynx from Clarias stappersi Boulenger, C. theodorae Weber (both new hosts, Clariidae) and C. gariepinus (Burchell), as well as S. polli from Synodontis nigromaculatus Boulenger (new host, Mochokidae). Moreover, spirurid larvae of an additional three species were found in fishes from the same locality: Rhabdochona paski Baylis, 1928 fourth-stage larva (Rhabdochonidae) in S. nigromaculatus (Mochokidae), Physalopteridae gen. sp. 1 third-stage larva in C. gariepinus (Clariidae) and Physalopteridae gen. sp. 2 third-stage larva in Serranochromis angusticeps (Boulenger) (Cichlidae), all representing new host and geographical records. Spinitectus zambezensis Boomker, 1993 is considered a junior synonym of S. polli.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s11230-015-9565-0 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Most herbivores must balance demands to meet nutritional requirements, maintain stable thermoregulation and avoid predation. Species-specific predator and prey characteristics determine the ability of prey to avoid predation and the ability of predators to maximize hunting success. Using GPS collar data from African wild dogs, lions, impala, tsessebes, wildebeest and zebra in the Okavango Delta, Botswana, we studied proactive predation risk avoidance by herbivores.
View Article and Find Full Text PDFLinks between the timing of life-history transitions and dietary and morphological variation during early life history in the sand goby, Pomatoschistus minutus.
J Fish Biol
September 2023
Department of Biology, University of Southern Denmark, Odense, Denmark.
Bipartite life histories involve a suite of morphological changes that support the pelagic to demersal transition and an expanded range of prey options and microhabitats. Pelagic individuals are thought to shift (settle) to their preferred benthic habitat at the earliest opportunity once they have attained a minimum level of morphological competency to access their new environment. In theory, early changes in larval morphology (collectively termed 'metamorphosis'), habitat and diet-a measure of habitat-use-ought to be synchronous.
View Article and Find Full Text PDFMicroplastic load in the surface water and Tilapia sparrmanii (Smith, 1840) of the river systems of Okavango Delta, Botswana.
Environ Monit Assess
July 2022
Department of Earth and Environmental Sciences, Botswana International University of Science and Technology, Palapye, Botswana.
Microplastics are 'emerging' contaminants that threatens freshwaters and may have negative impact on the aquatic organisms. However, Botswana has no information on the status of microplastics, including freshwater like the Okavango Delta- the largest, inland wetland hosting wildlife, tourism, and supporting the socio-economic lifestyle of inhabitants. This study assessed the spatial distribution and characterization of microplastics in surface water and in the digestive organs of fish (Tilapia sparrmanii) from the Okavango delta.
View Article and Find Full Text PDFFour new species of Serranochromis (Teleostei: Cichlidae) from the Cuanza and Okavango river systems in Angola, including a preliminary key for the genus.
Zootaxa
January 2021
Penn State University, 432 Forest Resources Building, University Park, Pennsylvania 16802, USA., 2Honorary Research Associate, South African Institute for Aquatic Biodiversity, Makhanda, RSA. South African Institute for Aquatic Biodiversity, Private Bag 1015, Makhanda, 6140, RSA.
Article Synopsis
- The study introduces four new species of fish in the Serranochromis genus, discovered in Angolan tributaries of the Cuanza and Okavango river systems.
- *Each species is characterized by unique morphological and meristic features, including variations in scale rows, teeth structure, and fin patterns, helping to distinguish them from one another.
- *The findings suggest that the limited geographic distribution of these species, along with their distinct traits, supports a theory of speciation driven by drainage isolation rather than just lake-based speciation.
Re-elevation to species level and redescription of Serranochromis jallae and Serranochromis robustus (Teleostei: Cichlidae).
Zootaxa
September 2020
Penn State University, 432 Forest Resources Building, University Park, Pennsylvania 16802, USA. Honorary Research Associate, South African Institute for Aquatic Biodiversity, Makhanda, 6140, RSA..
Article Synopsis
- The study compared two subspecies of fish, Serranochromis robustus from Lake Malaŵi and Serranochromis robustus jallae from Zambia, using morphological characteristics.
- Serranochromis robustus was reclassified as a separate species due to notable differences in jaw length, body depth, and caudal peduncle measurements between the two subspecies.
- Additionally, the color patterns during breeding were distinct: Serranochromis robustus displays blue/green coloration while Serranochromis robustus jallae has yellow/green coloration, along with varying fin band colors. *
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!