Version 1
: Received: 2 May 2023 / Approved: 4 May 2023 / Online: 4 May 2023 (03:52:38 CEST)
Version 2
: Received: 18 May 2023 / Approved: 19 May 2023 / Online: 19 May 2023 (08:10:55 CEST)
How to cite:
Costa, T.D.M.M.; Stauffer, T.; Soares-Gomes, A. Population Dynamics of the Coastal Wetland Key Specie Neohelice granulata (Decapoda, Varunidae) at the Northern Limit of its Distribution. Preprints2023, 2023050177. https://doi.org/10.20944/preprints202305.0177.v2
Costa, T.D.M.M.; Stauffer, T.; Soares-Gomes, A. Population Dynamics of the Coastal Wetland Key Specie Neohelice granulata (Decapoda, Varunidae) at the Northern Limit of its Distribution. Preprints 2023, 2023050177. https://doi.org/10.20944/preprints202305.0177.v2
Costa, T.D.M.M.; Stauffer, T.; Soares-Gomes, A. Population Dynamics of the Coastal Wetland Key Specie Neohelice granulata (Decapoda, Varunidae) at the Northern Limit of its Distribution. Preprints2023, 2023050177. https://doi.org/10.20944/preprints202305.0177.v2
APA Style
Costa, T.D.M.M., Stauffer, T., & Soares-Gomes, A. (2023). Population Dynamics of the Coastal Wetland Key Specie <em>Neohelice granulata</em> (Decapoda, Varunidae) at the Northern Limit of its Distribution. Preprints. https://doi.org/10.20944/preprints202305.0177.v2
Chicago/Turabian Style
Costa, T.D.M.M., Tainá Stauffer and Abilio Soares-Gomes. 2023 "Population Dynamics of the Coastal Wetland Key Specie <em>Neohelice granulata</em> (Decapoda, Varunidae) at the Northern Limit of its Distribution" Preprints. https://doi.org/10.20944/preprints202305.0177.v2
Abstract
In order to study the burrowing crab Neohelice granulata (Dana, 1851) in the northern limit of its distribution and to test the hypothesis that mesoscale factors are more deterministic than latitudinal variation in this crab life history, the population dynamics of this specie was studied in the Caceribú river (Rio de Janeiro state, Brazil). The sex ratio was female-biased over the year. Males were significantly larger (t-test = 3.53, p < 0.05) than females (CW mean = 29.14 mm and 27.32 mm, respectively), which were predominant in the intermediary-size classes. The breading season took place from February to November, with a peak in May. The recruitment was observed all over the year, but mostly from October to December. The size at maturity was estimated at 19.0 mm for females and 23.9 mm for males. Average fecundity was 20,419 eggs (±12,627.12) and showed a decrease from the first to the last stage of embryonic development. The asymptotic size was similar between males (CW∞ = 24.86 mm) and females (CW∞ = 24.50 mm). Longevity was estimated in 1.33 and 1.23 years in males and females, respectively. Mortality rates were slightly higher in males (Z = 3.71) than in females (Z 0 3.41). Analysing the results of this study and the literature we conclude that the population dynamics of N. granulata do not follow a latitudinal trend. This strengthens the hypothesis that brachyurans’ life histories are mainly driven by mesoscales factors than latitudinal variation.
Keywords
growth; reproduction; mangroves; Decapoda
Subject
Biology and Life Sciences, Animal Science, Veterinary Science and Zoology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Commenter: Tarso Costa
Commenter's Conflict of Interests: Author