Описание
The fish of Lake Tanganyika documented in March 2024 along the coast of Tanganyika Province, DRC.
Записи данных
Данные этого occurrence ресурса были опубликованы в виде Darwin Core Archive (DwC-A), который является стандартным форматом для обмена данными о биоразнообразии в виде набора из одной или нескольких таблиц. Основная таблица данных содержит 62 записей.
Данный экземпляр IPT архивирует данные и таким образом служит хранилищем данных. Данные и метаданные ресурсов доступны для скачивания в разделе Загрузки. В таблице версий перечислены другие версии ресурса, которые были доступны публично, что позволяет отслеживать изменения, внесенные в ресурс с течением времени.
Версии
В таблице ниже указаны только опубликованные версии ресурса, которые доступны для свободного скачивания.
Как оформить ссылку
Исследователи должны дать ссылку на эту работу следующим образом:
Mushagalusa D, Moore F, Lehman A (2024): Fisheries of Western Lake Tanganyika. v1.0. Lake Tanganyika Floating Health Clinic/WAVE. Dataset/Occurrence.
Права
Исследователи должны соблюдать следующие права:
Публикующей организацией и владельцем прав на данную работу является Lake Tanganyika Floating Health Clinic. Эта работа находится под лицензией Creative Commons Attribution Non Commercial (CC-BY-NC 4.0).
Регистрация в GBIF
Этот ресурс был зарегистрирован в GBIF, ему был присвоен следующий UUID: c58e37c4-90dd-49c1-b101-3ab9904d4854. Lake Tanganyika Floating Health Clinic отвечает за публикацию этого ресурса, и зарегистрирован в GBIF как издатель данных при оподдержке Participant Node Managers Committee.
Ключевые слова
Occurrence; Fisheries; Lake; Tanganyika; Africa; Freshwater
Контакты
- Originator ●
- Point Of Contact
- Researcher
- Metadata Provider ●
- Originator ●
- Point Of Contact
- Project Manager
- Principal Investigator
- Founder/CEO
- Principal Investigator
- CEO/FOUNDER
Географический охват
Western Lake Tanganyika within the boundaries of the Democratic Republic of the Congo.
| Ограничивающие координаты | Юг Запад [-6, 29,1], Север Восток [-5, 29,55] |
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Таксономический охват
Описание отсутсвует
| Kingdom | Animalia |
|---|---|
| Phylum | Chordata |
| Class | Actinopterygii |
| Order | Clupeiformes, Perciformes, Cichliformes, Cyprinodontiformes, Siluriformes |
| Family | Cichlidae, Poeciliidae, Bagridae, Latidae, Clupeidae |
Временной охват
| Дата начала / Дата окончания | 2024-03-07 / 2024-03-18 |
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Данные проекта
Key biodiversity sampling of fish populations in western Lake Tanganyika.
| Название | Critical Biodiversity Surveys in the Lake Tanganyika & Ruzizi River Basins |
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| Финансирование | JRS Biodiversity Foundation - P.O. Box 4541, Arlington VA 22204 The Nature Conservancy - 4245 North Fairfax Drive, Suite 100, Arlington, Virgina 22203-1606 |
| Описание района исследования | Western Lake Tanganyika, within the boundaries of the Democratic Republic of the Congo. |
| Описание плана выполнения исследований | Fish sampling was carried out from local commercial caches by fishermen using various fishing gears and techniques (e.g., gillnet, seine, liftnet and handlines) when landing in nearshore villages visited at the study area and analysed at the laboratory of Biology at the Centre for Research on Hydrobiology (DR Congo). |
Исполнители проекта:
- Principal Investigator
Методы сбора
Collections of fish samples were performed once or twice per site during the study period using complementary methods in each selected station. Individuals fish species were collected in different habitats within the selected sites from local commercial catches of fishermen using their different fishing gears: gillnets of different mesh sizes and widths, beach seines and liftnets with mixed mesh sizes, gillnets with various techniques (i.e., monofilament, dormant, encircling and deep gillnets, …) and illegal mosquito nets of smaller mesh-sizes (02-03 mm). These various gears were surveyed in each sampling day and site according to the fishing habitat (lake substratum) and lake site (inshore vs. offshore). We recorded the features of each net directly at the sampling site such as the length, width (near 1.00 m) and mesh-size (near 1.00 mm) using a measuring tape or decametre. We noted the fishing depth, the duration as well as the effort (e.g., number of nets per active fishing unit, number of fisherman and net hauls) for each gear. The presence of each gear at a site allowed assessing the rate of fishing activity and fish distribution within the sampling habitats. The type of fishery and net, the numbers of fishermen involved per trip and per fishing unit were recorded and are discussed in relation to the type of gear used. After each fishing trial, fresh weight (in kg) of each sample was measured per fishing gear and number (net hauls per trip) recorded whenever possible. For each type of fishing, fish samples with a selection of species were usually bought from fishermen, and preliminary sorted at sampling sites (as fishermen did not deliver their entire fish capture) by species and after being weighed. The fish samples (handful) were collected and killed and preserved into ethanol (75%) and then fixed in formaldehyde (10%) to slow decomposition of organs. All fish species captured were identified, weighed and counted following the fishing habitat and effort. The samples were separated into smaller bags by type of fishing-gear, site and other parameters of the fishing-effort and environment and kept in 10% formaldehyde for subsequent analysis in the laboratory
| Охват исследования | The field area was located at the northwestern part of Lake Tanganyika along the Congolese shores near and north of Baraka City in the territory of Fizi. Due to logistic constraints and field accessibility (human activities disruption or not, fishing effort) and safety, the sampling and survey sites consisted of main villages established along the coastline in these areas. This region has a tropical humid climate characterized by an alternation of wet and dry seasons and is currently subject to physical factors at different scales. All those beach fishing sites were easily accessible from each one by boat and have fishing activities as main occupation. Whenever necessary, each main site was split up into different small sub-sites according to the type of littoral habitat of the lake, i.e., sandy, rocky, mixed, and the type of fishing practices. The critical habitat of a fish species is defined as a geographic or physical area essential to the realization of the life cycle (Lévêque 1995). However, the knowledge of local communities and advices of experienced local fishermen were considered during the fish sampling in each site. At the field of investigation, some localities of high human influences are undergoing alterations (water pollution and sedimentation, fishing with unsuitable fishing gears and techniques and deforestation) with some fish species exposed to human pressures or extinction in the future. |
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| Контроль качества | Quality control was implemented through the steps and process outlined for all staff at the Center for Research on Hydrobiology. In addition, there was internal quality control measures that were put in place such as routine monitoring and evaluation of project progress. |
Описание этапа методики:
- At the laboratory of Biology at the Centre de Recherche en Hydrobiologie (CRH, Uvira, DR Congo) each sample was re-sorted into species by fishing gear and habitat or fishing effort and each species identified following available books and/or keys (Fryer and Iles 1972; Axelrod et al 1977; Poll 1956, 1986; Brichard 1978, 1989; Eccles 1992; Konings 2015; Fermon et al 2007) Then, specimens were sorted by species, counted and the total, standard lengths (TL and SL) and the body height (BH) were measured (nearest 0.1 mm). These measurements and measuring techniques of fish were executed according to Barel et al. (1977), Eccles (1992), Snoeks (1994), Snoeks et al (1994), Snoeks et al (1997), Snoeks (2000) and Hanssens and Snoeks (2003). Sex was determined by exanimating the genital papillae and other external body feature such as coloration patterns (Snoeks 2000). For details in the sex, fish were dissected to determine the maturity stages of gonads following De Kimpe (1964), Micha (1973), Plisnier (1990). Each fish was then weighed (using various scales following species and individual sizes), the viscera and the gonads removed, and weighed (nearest 0.001g) and the body re-weighed to calculate the gonado-somatic index (GSI).
Дополнительные метаданные
| Альтернативные идентификаторы | c58e37c4-90dd-49c1-b101-3ab9904d4854 |
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| https://cloud.gbif.org/africa/resource?r=ltfhcfisheriesdata052924 |