Citation:

s10750-018-3798-2

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Abstract:

For the parasitological survey, 23 cichlid species were screened for metazoan ecto- and endoparasites (Supplementary Table 1). Sampling was conducted at Toby's place on the Zambian shoreline of Lake Tanganyika. While most fish species were obtained in August 2012, S. diagramma and H. microlepis were captured in August 2011 and July 2013, respectively. One species, A. burtoni, was obtained in July 2013 at Kapata, which is about 20 km southward. About 7 to 18 individuals per species (usually ten) were caught by chasing fish into standing nets (Supplementary Table 1). After capture the fish were kept in tanks of 0.8 m x 0.8 m x 1.2 m depth or 0.8 m x 0.8 m x 2 m depth. Before usage, tanks were cleaned, dried and filled with lake water.

All fish were dissected in the field within four days post-capture. The day of dissection (0, 1, 2 or 3 days after capture) was recorded in order to keep track of changes in parasitological parameters while the fish were kept in the tanks. Individual fish were killed with an overdose of MS222. The parasitological survey consisted of three parts. First, the outer surface and the mouth cavity of the fish were inspected for ectoparasitic monogeneans and crustaceans (copepods, branchiurans, isopods), bivalves, and any kind of helminthic cysts. Second, the four gill-branches on the left were dissected and stored on 100% analytical ethanol (EtOH), and later in the lab screened for ectoparasitic monogeneans, crustaceans (copepods and branchiurans), bivalves, and any kind of helminthic cysts. Third, fish were screened for intestinal monogeneans, digeneans, acanthocephalans, nematodes, and any kind of helminthic cysts. To do so, stomach, intestines, gall and urinary bladder were dissected and inspected in a petridish with lake water. Finally, the sex of the fish was determined by visual inspection of the genital papilla and gonad development.

The parasitological survey was performed with a stereomicroscope and by multiple observers. Observers were recorded in order to keep track of observer bias. A single observer screened the outer surface and the mouth cavity of the fish. The number of observers varied between years for gills and intestines (gills: two observers in each year; intestines: three, four and one observer(s) in 2011, 2012 and 2013, respectively). All parasites were counted and identified to genus or class level and preserved as follows. Monogeneans were isolated using dissection needles and were either mounted on slides in ammonium picrate glycerine for further morphological characterization, or stored on 100 % EtOH. Acanthocephalans and nematodes were stored on 80 % EtOH, while intestinal monogeneans, branchiurans, copepods, any kind of helminthic cysts, bivalves and unknown groups were stored on 100 % EtOH.

Coverage:

Median Latitude: -8.675165 * Median Longitude: 31.187398 * South-bound Latitude: -8.749203 * West-bound Longitude: 31.172739 * North-bound Latitude: -8.623293 * East-bound Longitude: 31.200454

Event(s):

Isanga * Latitude: -8.653000 * Longitude: 31.189000 * Method/Device: Net (NET)

Kapata * Latitude: -8.749203 * Longitude: 31.172739 * Method/Device: Net (NET)

Tobys-place * Latitude: -8.623293 * Longitude: 31.200454 * Method/Device: Net (NET)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Meyer, Britta S
2	Identification	ID		Meyer, Britta S	specimen ID
3	Code	Code		Meyer, Britta S	species abbreviation
4	Sampling date	Sampling date		Meyer, Britta S	Year
5	Species	Species		Meyer, Britta S
6	Tribe	Tribe		Meyer, Britta S
7	Location	Location		Meyer, Britta S
8	Length, standard	l std	cm	Meyer, Britta S	of specimen
9	Sex	Sex		Meyer, Britta S
10	Sampling date	Sampling date		Meyer, Britta S
11	Date	Date		Meyer, Britta S	processing
12	Duration, number of days	Duration	days	Meyer, Britta S	between collection and processing
13	Curator/sampler	Curator		Meyer, Britta S	Intestine.Dissector
14	Curator/sampler	Curator		Meyer, Britta S	Gill.screener
15	Acanthocephala	Acanthocephala	#	Meyer, Britta S	found in the intestine
16	Nematoda	Nematoda	#	Meyer, Britta S	found in the intestine
17	Urogyrus sp.	Urogyrus sp.	#	Meyer, Britta S	found in the urinary bladder
18	Enterogyrus spp.	Enterogyrus spp.	#	Meyer, Britta S	found on the gills
19	Digenea	Digenea	#	Meyer, Britta S	found in the intestine
20	Cysts	Cysts	#	Meyer, Britta S	helminthic cysts on gills
21	Cysts	Cysts	#	Meyer, Britta S	helminthic cysts on fins and other areas
22	Gyrodactylus spp.	Gyrodactylus spp.	#	Meyer, Britta S	found on the gills
23	Cichlidogyrus spp.	Cichlidogyrus spp.	#	Meyer, Britta S	found on the gills
24	Ergasilus spp.	Ergasilus spp.	#	Meyer, Britta S	found on the gills

License:

Creative Commons Attribution-NonCommercial 3.0 Unported (CC-BY-NC-3.0)

Size:

5491 data points

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