Habitat use, non-breeding groupings and chromatic pattern in Johngarthia lagostoma (H. Milne Edwards, 1837) (Decapoda, Gecarcinidae) in Trindade Island, South Atlantic Ocean
The land crab Johngarthia lagostoma is endemic to Trindade Island, Atol das Rocas, Fernando de Noronha and Ascension Islands. The natural history of the species in non-breeding periods is little known. Therefore, here we reported the formation of non-breeding groups and evaluated the chromatic popul...
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Online Access: | https://doi.org/10.3897/neotropical.18.e101409 https://neotropical.pensoft.net/article/101409/ |
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ftpensoft:10.3897/neotropical.18.e101409 2023-05-15T18:21:17+02:00 Habitat use, non-breeding groupings and chromatic pattern in Johngarthia lagostoma (H. Milne Edwards, 1837) (Decapoda, Gecarcinidae) in Trindade Island, South Atlantic Ocean Entringer Jr,Hilton Srbek-Araujo,Ana Carolina 2023 text/html https://doi.org/10.3897/neotropical.18.e101409 https://neotropical.pensoft.net/article/101409/ en eng Pensoft Publishers info:eu-repo/semantics/altIdentifier/eissn/2236-3777 info:eu-repo/semantics/openAccess Neotropical Biology and Conservation 18(1): 83-95 Chromatic variation founder effect insular environment land crab natural history oceanic islands Short Communication 2023 ftpensoft https://doi.org/10.3897/neotropical.18.e101409 2023-03-28T00:01:59Z The land crab Johngarthia lagostoma is endemic to Trindade Island, Atol das Rocas, Fernando de Noronha and Ascension Islands. The natural history of the species in non-breeding periods is little known. Therefore, here we reported the formation of non-breeding groups and evaluated the chromatic populational pattern of J. lagostoma in Trindade Island. Records were obtained between April and June 2015. The groups were characterized according to their location, terrain elevation, environmental characteristics and specimens’ behavior. The chromatic pattern was defined by the classification of individuals between yellow and purple, and the proportion of each color was compared between populational units (previously defined based on genetic differences). Non-breeding groups were recorded in four locations in Trindade Island, at altitudes < 40 m, and all of them were in locations with food resources and sediment suitable for the construction of shelters. Isolated individuals or the absence of the species were observed in the most inhospitable places, indicating that the maintenance of the species depends on portions of suitable habitat amid the currently arid matrix. Yellow individuals (96.4%) were predominant on Trindade Island and the chromatic pattern differed from the other populations. Color patterns seem to follow genetic differences between populations, and the founder effect may account for current patterns. From the data obtained, we emphasize that the maintenance of the species may depend on food, sediment suitable for shelters construction, humidity and shade. Due to the significant population decline in other regions, the need to define guidelines for the conservation of the species on Trindade Island is highlighted. In this context, the regeneration of insular vegetation and prohibiting the known anthropic consumption of individuals may represent important strategies for the maintenance of the species. Other/Unknown Material South Atlantic Ocean Pensoft Publishers Ascension Islands ENVELOPE(-81.687,-81.687,64.373,64.373) Rocas ENVELOPE(-56.948,-56.948,-63.398,-63.398) Neotropical Biology and Conservation 18 1 83 95 |
institution |
Open Polar |
collection |
Pensoft Publishers |
op_collection_id |
ftpensoft |
language |
English |
topic |
Chromatic variation founder effect insular environment land crab natural history oceanic islands |
spellingShingle |
Chromatic variation founder effect insular environment land crab natural history oceanic islands Entringer Jr,Hilton Srbek-Araujo,Ana Carolina Habitat use, non-breeding groupings and chromatic pattern in Johngarthia lagostoma (H. Milne Edwards, 1837) (Decapoda, Gecarcinidae) in Trindade Island, South Atlantic Ocean |
topic_facet |
Chromatic variation founder effect insular environment land crab natural history oceanic islands |
description |
The land crab Johngarthia lagostoma is endemic to Trindade Island, Atol das Rocas, Fernando de Noronha and Ascension Islands. The natural history of the species in non-breeding periods is little known. Therefore, here we reported the formation of non-breeding groups and evaluated the chromatic populational pattern of J. lagostoma in Trindade Island. Records were obtained between April and June 2015. The groups were characterized according to their location, terrain elevation, environmental characteristics and specimens’ behavior. The chromatic pattern was defined by the classification of individuals between yellow and purple, and the proportion of each color was compared between populational units (previously defined based on genetic differences). Non-breeding groups were recorded in four locations in Trindade Island, at altitudes < 40 m, and all of them were in locations with food resources and sediment suitable for the construction of shelters. Isolated individuals or the absence of the species were observed in the most inhospitable places, indicating that the maintenance of the species depends on portions of suitable habitat amid the currently arid matrix. Yellow individuals (96.4%) were predominant on Trindade Island and the chromatic pattern differed from the other populations. Color patterns seem to follow genetic differences between populations, and the founder effect may account for current patterns. From the data obtained, we emphasize that the maintenance of the species may depend on food, sediment suitable for shelters construction, humidity and shade. Due to the significant population decline in other regions, the need to define guidelines for the conservation of the species on Trindade Island is highlighted. In this context, the regeneration of insular vegetation and prohibiting the known anthropic consumption of individuals may represent important strategies for the maintenance of the species. |
format |
Other/Unknown Material |
author |
Entringer Jr,Hilton Srbek-Araujo,Ana Carolina |
author_facet |
Entringer Jr,Hilton Srbek-Araujo,Ana Carolina |
author_sort |
Entringer Jr,Hilton |
title |
Habitat use, non-breeding groupings and chromatic pattern in Johngarthia lagostoma (H. Milne Edwards, 1837) (Decapoda, Gecarcinidae) in Trindade Island, South Atlantic Ocean |
title_short |
Habitat use, non-breeding groupings and chromatic pattern in Johngarthia lagostoma (H. Milne Edwards, 1837) (Decapoda, Gecarcinidae) in Trindade Island, South Atlantic Ocean |
title_full |
Habitat use, non-breeding groupings and chromatic pattern in Johngarthia lagostoma (H. Milne Edwards, 1837) (Decapoda, Gecarcinidae) in Trindade Island, South Atlantic Ocean |
title_fullStr |
Habitat use, non-breeding groupings and chromatic pattern in Johngarthia lagostoma (H. Milne Edwards, 1837) (Decapoda, Gecarcinidae) in Trindade Island, South Atlantic Ocean |
title_full_unstemmed |
Habitat use, non-breeding groupings and chromatic pattern in Johngarthia lagostoma (H. Milne Edwards, 1837) (Decapoda, Gecarcinidae) in Trindade Island, South Atlantic Ocean |
title_sort |
habitat use, non-breeding groupings and chromatic pattern in johngarthia lagostoma (h. milne edwards, 1837) (decapoda, gecarcinidae) in trindade island, south atlantic ocean |
publisher |
Pensoft Publishers |
publishDate |
2023 |
url |
https://doi.org/10.3897/neotropical.18.e101409 https://neotropical.pensoft.net/article/101409/ |
long_lat |
ENVELOPE(-81.687,-81.687,64.373,64.373) ENVELOPE(-56.948,-56.948,-63.398,-63.398) |
geographic |
Ascension Islands Rocas |
geographic_facet |
Ascension Islands Rocas |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Neotropical Biology and Conservation 18(1): 83-95 |
op_relation |
info:eu-repo/semantics/altIdentifier/eissn/2236-3777 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3897/neotropical.18.e101409 |
container_title |
Neotropical Biology and Conservation |
container_volume |
18 |
container_issue |
1 |
container_start_page |
83 |
op_container_end_page |
95 |
_version_ |
1766200467394658304 |