Description
Data on the distribution, reproductive and survival rates and abundance of the Lahille's bottlenose dolphin, Tursiops truncatus gephyreus, inhabiting the Patos Lagoon estuary and adjacent marine coast have been collected data from August 2005 to December 2018. Data have been acquired systematically and intensively applying direct observation and photo-identification approaches. This temporal data series allowed estimating the reproductive and survival rates of calf, juvenile and adult (females and males) dolphins and total population abundance. Variability in estimates was evaluated based on the continuity of the long-term surveys carried out during this period.
Data Records
The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 679 records.
2 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versions
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Secchi E R, Fruet P, Genoves R C (2018): PELD-ELPA Ecology of Lahille's bottlenose dolphin Tursiops truncatus gephyreus in the Patos Lagoon estuary and adjacent marine coast. v1.11. Sistema de Informação sobre a Biodiversidade Brasileira - SiBBr. Dataset/Samplingevent. https://ipt.sibbr.gov.br/peld/resource?r=ecology_of_bottlenose_dolphin_-_tursiops_truncatus_on_the_patos_lagoon_estuary_and_adjacent_marine_coast&v=1.11
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is Universidade Federal do Rio Grande. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC 4.0) License.
GBIF Registration
This resource has been registered with GBIF, and assigned the following GBIF UUID: b26471a6-7ef8-4bea-b62f-20c5bd8deffe. Universidade Federal do Rio Grande publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Brazil.
Keywords
Samplingevent; Tursiops truncatus gephyreus; abundance; survival; trophic ecology; distribution; reproduction; stable isotopes; diet.; Samplingevent
Contacts
- Principal Investigator
https://orcid.org/0000-0001-9087-9909
- Originator
- Originator
- Point Of Contact
- Point Of Contact
- Principal Investigator
- Point Of Contact
Geographic Coverage
The study area of 140km² was divided in three major areas: estuary, with 40km² and the coastal areas south and north, each one with 50km². These three areas were subdivided in more three sub-areas: inner estuary (31° 58,94’S/52° 04,33’W; 31° 58,69’S/052° 03,30’W; 32° 03,00’S/052° 02,87’W and 32° 02,99’S/052° 04,24’W); medium estuary (32° 02,99’S/052° 04,24’W; 32° 03,00’S/052° 02,87’W; 32° 07,99’S/052° 05,66’W and 32° 08,00’S/052° 06,19’W); mouth of estuary (32° 08,00’S/052° 06,19’W; 32° 07,99’S/052° 05,66’W; 32° 11,21’S/052° 04,47’W and 32° 11,27’S/052° 04,83’W); adjacency south (32° 09,97’S/052° 05,90’W; 32° 11,27’S/052° 04,83’W; 32° 12,17’S/052° 07,84’W and 32° 11,40’S/052° 08,72’W); medium south (32° 11,40’S/052° 08,72’W; 32° 12,17’S/052° 07,84’W; 32° 16,01’S/052° 12,16’W and 32° 15,31’S/052° 13,12’W); further south (32° 15,31’S/052° 13,12’W; 32° 16,01’S/052° 12,16’W; 32° 20,42’S/052° 15,57’W and 32° 19,82’S/052° 16,60’W); adjacency north (32° 09,61’S/052° 04,85’W; 32° 11,20’S/052° 04,47’W; 32° 07,93’S/052° 02,33’W and 32° 07,20’S/052° 03,27’W); medium north (32° 07,20’S/052° 03,27’W; 32° 07,93’S/052° 02,33’W; 32° 03,73’S/051° 58,25’W and 32° 03,07’S/051° 59,24’W) and further north (32° 03,07’S/051° 59,24’W; 32° 03,73’S/051° 58,25’W; 31° 59,71’S/051° 53,95’W and 31° 59,03’S/051° 54,93’W).
| Bounding Coordinates | South West [-32.59, -52.54], North East [-31.55, -51.15] |
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Taxonomic Coverage
Collected species: Lahille's bottlenose dolphins (Tursiops truncatus gephyreus Montagu, 1821).
| Kingdom | Animalia |
|---|---|
| Phylum | Chordata |
| Class | Mammalia |
| Order | Cetartiodactyla |
| Infraorder | Cetacea |
| Superfamily | Odontoceti |
| Family | Delphinidae |
| Genus | Tursiops |
| Species | Tursiops truncatus gephyreus (Lahille's bottlenose dolphins) |
Temporal Coverage
| Start Date / End Date | 2005-08-04 / 2018-12-21 |
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Project Data
To evaluate variations on the Patos Lagoon estuary biota in response to hidrological long-term changes related to climatic events and anthropic action.
| Title | Long-term studies to assess natural and anthropogenic impacts on the estuary of the Patos Lagoon and Adjacent Coast. |
|---|---|
| Identifier | PELD-ELPA |
| Funding | Long term research program (PELD) of the Brazilian Ministry of Sciences/National Science and Technology Council (CNPq) |
| Study Area Description | The Patos Lagoon at the southern Brazilian coastal plain (Rio Grande do Sul state) is the largest (10,360 km2) choked lagoon in the world stretching in a NE SW direction from the city of Porto Alegre (30º30’ S) to Rio Grande (32º12’ S). In the southern estuarine region, approximately 10 % of total area, a single and narrow inlet connects this lagoon to the Atlantic Ocean. The major tributary rivers at the northern and central areas of Patos Lagoon, and the São Gonçalo channel at the southern area, are significant freshwater sources from an extensive drainage basin. The hydrodynamics of Patos Lagoon estuary is strongly controlled by the discharge of tributary rivers and the action of predominant meteorological factors like winds, rainfall and evaporation. |
| Design Description | The sampling area on the Patos Lagoon estuary extends from the inner estuary, channel and shallow coastal region, including the adjacent marine coastal waters. Different sampling strategies are used, according to the goals and characteristics of the abiotic and biotic data to be obtained. Meteorological data, current and climatic indexes are also used. Terrestrial and aquatic vehicles are used for sampling. |
The personnel involved in the project:
Sampling Methods
Distribution patterns and habitat use: All field work was carry out onboard a 5.6m inflatable boat equipped with 90 hp outboard engine, VHF radio, echo sounder and GPS. Boat-based surveys were conducted year-round on the core area of Patos Lagoon estuary (PLE) dolphin community. Surveys in estuarine waters were conducted following predefined zigzag transects whereas in the adjacent marine coast we run either zigzag or parallel-to-shore transects up to 20 km north and south of the estuary mouth, depending on the sea conditions. Surveys were halted when the sea state (Beaufort scale) were > 3. Transects were run at speeds between 18 and 22 km/h. Two observers positioned in the bow searched for dolphins visually. Whenever a dolphin group was sighted, the survey route was abandoned to approach the animals for photo-identification and to obtain data of group size and composition, sighting depth and geographical position. After a sufficient number of good-quality digital photographs of the dorsal fins of all presumed animals were taken, the survey was resumed.
| Study Extent | The area sampled is 140 km2 and encompasses the lower portion of the PLE (40 km2) and adjacent marine coast (50 km2 south and 50 km2 north of PLE in the coastal zone). Temporal coverage: August 2005 to December 2018. |
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Method step description:
- Estimates of abundance, reproductive and survival rates: Abundance estimates were based on mark-recapture models for closed populations that deals with heterogeneity in capture probabilities. Survival rates were also estimated from mark-recapture models, but in this case, using open population models. The identification and monitoring of mother-calf pairs over time, from the beginning of the breeding season, were designed to allow approximate calculations of birth intervals and reproductive rates and their temporal trends.
Bibliographic Citations
- Lemos, V. M., Lanari, M., Copertino, M., Secchi, E. R., de Abreu, P. C. O., Muelbert, J. H., Garcia, A. M., Dumont, F. C., Muxagata, E., Vieira, J. P., Colling, A. & Odebrecht, C. (2022). Patos Lagoon estuary and adjacent marine coastal biodiversity long-term data. Earth System Science Data, 14(3), 1015-1041. https://doi.org/10.5194/essd-14-1015-2022
Additional Metadata
| Purpose | The general purposes of this data bank are to provide information on observations of Lahille's bottlenose dolphins in the Patos Lagoon estuary. |
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| Maintenance Description | The data bank is continously checked and complemented, in general with a weekly and monthly approach. |
| Alternative Identifiers | 5f8eeafe-fa02-4e89-9027-d0922d611cca |
| https://ipt.sibbr.gov.br/peld/resource?r=ecology_tursiops_truncatus |