Distribution and Characteristics of Halobates germanus Population in the Red Sea
| Autor: | Susana Agustí, Carlos M. Duarte, Gauri A. Mahadik |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
lcsh:QH1-199.5 010504 meteorology & atmospheric sciences Population Zoology Ocean Engineering neuston lcsh:General. Including nature conservation geographical distribution Aquatic Science Biology Oceanography 01 natural sciences sea skaters Halobates germanus Abundance (ecology) Halobates lcsh:Science Nymph education 0105 earth and related environmental sciences Water Science and Technology abundance Global and Planetary Change education.field_of_study 010604 marine biology & hydrobiology population structure biology.organism_classification Instar lcsh:Q Neuston Sex ratio |
| Zdroj: | Frontiers in Marine Science, Vol 6 (2019) |
| ISSN: | 2296-7745 |
| DOI: | 10.3389/fmars.2019.00408 |
| Popis: | We investigated the occurrence of the sea skater Halobates spp. from samples collected at a fixed time series station and from six cruises along the north-south extend of the Red Sea during 2016–2018. Halobates germanus White, 1883 was the only species found during our study, its distribution ranging between 17° 9′N and 27° 27′N and between 35° 67′E and 41° 49′E. Total H. germanus abundance ranged between zero to 158,610 individuals km-2 with a considerable temporal (at the fixed station) and spatial (cruises) variation. In general, nymphs of different instar stages dominated the population, followed by females and males. The sex ratio was female-biased, with a higher number of females than males. Presence and prevalence of eggs, exuviae (molts), and early nymphal stages indicate a year round breeding cycle by H. germanus. The apparent optimum temperature for H. germanus occurrence in the central Red Sea was at 28.2°C, corresponding to peak abundances in spring and fall. Absence of any significant correlation of the abundances with environmental parameters indicate relative resilience of H. germanus to changes in environmental conditions. |
| Databáze: | OpenAIRE |
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