{"refrec":{"BRefID":405748,"RR":"<b>Tavares, R.G.; Paschoal, L.R.P.; Guimarães, F.J.; Brandão, S.N.; da Conceição Guerreiro Couto, E.</b> (2025). Spatio-temporal distribution and population dynamics of two sympatric species: The rock shrimps <i>Sicyonia dorsalis</i> Kingsley, 1878 and <i>Sicyonia typica</i> (Boeck, 1864) (Penaeoidea: Sicyoniidae) on the coast of Ilhéus, Bahia, northeastern Brazil. <i>Arthropoda 3(1)</i>: 1. <a href=\"https://dx.doi.org/10.3390/arthropoda3010001\" target=\"_blank\">https://dx.doi.org/10.3390/arthropoda3010001</a>","BEntID":403543,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>Arthropoda 3(1)</i>: 1. <a href=\"https://dx.doi.org/10.3390/arthropoda3010001\" target=\"_blank\">https://dx.doi.org/10.3390/arthropoda3010001</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Tavares, R.G.; Paschoal, L.R.P.; Guimarães, F.J.; Brandão, S.N.; da Conceição Guerreiro Couto, E.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Tavares, R.G. <i>et al.</i>","Englishabstract":"Rock shrimps (Sicyonia dorsalis and Sicyonia typica) are commonly caught as bycatch during shrimp trawling along the Brazilian coast, but are not commercially exploited due to their small size and hard carapace. This study evaluated their spatio-temporal distribution, size classes, and sex ratio near the Almada River Estuary, Ilhéus, Bahia, Northeastern Brazil, and tested correlations between environmental factors and species abundance. Samples were collected monthly using double-rig trawl nets in the estuary and along transects at depths of 5–35 m. Bottom water and sediment samples were obtained for analyses of environmental factors. In total, 5336 individuals of S. dorsalis and 303 individuals of S. typica were collected. No individuals were recorded in the estuary. Both species were significantly more abundant between 25 and 35 m, where fine sediment with high levels of organic matter occurred. Considering the temporal variation, their abundance decreased during the rainy season, coinciding with increased river flow. Organic matter content, salinity, and water transparency were the primary environmental factors influencing abundance. Females were generally larger and predominant compared to males, likely due to life cycle dynamics. Despite being congeneric and sympatric, the species exhibited distinct population patterns, possibly to avoid niche overlap and competition.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Spatio-temporal distribution and population dynamics of two sympatric species: The rock shrimps <i>Sicyonia dorsalis</i> Kingsley, 1878 and <i>Sicyonia typica</i> (Boeck, 1864) (Penaeoidea: Sicyoniidae) on the coast of Ilhéus, Bahia, northeastern Brazil","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Almada River; bycatch; shrimp trawling; southern Bahia","OtherDescriptors":null,"Notes":null,"AnaPub":2025,"MonPub":null,"DateUpdate":"2025-02-17","DateCreate":"2025-02-17","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1,"DOI":"10.3390/arthropoda3010001"},"refs":null,"anarec":{"AnaID":405748,"PubliDate":2025,"Pagination":"1","XtraPublOfAnaID":null,"ISBN":null,"Volume":"3","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":367370,"SerRR":"Arthropoda. 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